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May 2016

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Re: [Maria-developers] [Commits] 454a9dc: MDEV-10004: Galera's pc.recovery process fails in 10.1 with systemd
by Sergey Vojtovich 27 May '16

27 May '16

Hi Nirbhay, I believe this patch is acceptable. Still I didn't completely understand the need for all this complexity and your answer to Daniel's question. Some minor comments inline. On Fri, May 20, 2016 at 11:04:24PM -0400, Nirbhay Choubey wrote: > revision-id: 454a9dc53a5b02af316dd713c577082eb8cf79c4 (mariadb-10.1.14-4-g454a9dc) > parent(s): 9a1c4e900b98fdb9940aab57c895753f175c2bd8 > author: Nirbhay Choubey > committer: Nirbhay Choubey > timestamp: 2016-05-20 23:04:20 -0400 > message: > > MDEV-10004: Galera's pc.recovery process fails in 10.1 with systemd > > Galera recovery process works in two phases. In the first > phase, mysqld is started as non-daemon with --wsrep-recover > to recover and fetch the last logged global transaction ID. > This ID is then used in second phase as the start position > (--wsrep-start-position=XX) to start mysqld as daemon. > > As this process was implemented in mysqld_safe script, the > recovery did not work when server was started using systemd. > > Fixed by introducing a shell script (wsrep_recovery.sh) that > mimics the first phase of the recovery process. > > --- > cmake/systemd.cmake | 3 +- > scripts/galera_recovery.sh | 94 ++++++++++++++++++++++++++++++++++++++++ > support-files/mariadb.service.in | 11 ++++- > 3 files changed, 106 insertions(+), 2 deletions(-) > > diff --git a/cmake/systemd.cmake b/cmake/systemd.cmake > index b0161cf..17f44f7 100644 > --- a/cmake/systemd.cmake > +++ b/cmake/systemd.cmake > @@ -55,9 +55,10 @@ MACRO(CHECK_SYSTEMD) > IF(HAVE_SYSTEMD AND HAVE_SYSTEMD_SD_DAEMON_H AND HAVE_SYSTEMD_SD_LISTEN_FDS > AND HAVE_SYSTEMD_SD_NOTIFY AND HAVE_SYSTEMD_SD_NOTIFYF) > ADD_DEFINITIONS(-DHAVE_SYSTEMD) > - SET(SYSTEMD_SCRIPTS mariadb-service-convert galera_new_cluster) > + SET(SYSTEMD_SCRIPTS mariadb-service-convert galera_new_cluster galera_recovery) > SET(SYSTEMD_DEB_FILES "usr/bin/mariadb-service-convert > usr/bin/galera_new_cluster > + usr/bin/galera_recovery > ${INSTALL_SYSTEMD_UNITDIR}/mariadb.service > ${INSTALL_SYSTEMD_UNITDIR}/mariadb@.service > ${INSTALL_SYSTEMD_UNITDIR}/mariadb(a)bootstrap.service.d/use_galera_new_cluster.conf") > diff --git a/scripts/galera_recovery.sh b/scripts/galera_recovery.sh > new file mode 100755 > index 0000000..6d4f1d5 > --- /dev/null > +++ b/scripts/galera_recovery.sh > @@ -0,0 +1,94 @@ > +#!/bin/sh > + > +# Copyright (c) 2016 MariaDB Corporation > +# > +# This program is free software; you can redistribute it and/or modify > +# it under the terms of the GNU General Public License as published by > +# the Free Software Foundation; version 2 of the License. > +# > +# This program is distributed in the hope that it will be useful, > +# but WITHOUT ANY WARRANTY; without even the implied warranty of > +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > +# GNU General Public License for more details. > +# > +# You should have received a copy of the GNU General Public License > +# along with this program; if not, write to the Free Software > +# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ > + > + > +# This script is intended to be executed by systemd. It starts mysqld with > +# --wsrep-recover to recover from a non-graceful shutdown, determines the > +# last stored global transaction ID and echoes it in --wsrep-start-position=XX > +# format. The output is then captured and used by systemd to start mysqld. > +# If the server was configured to start without wsrep, nothing is echoed. > + > +user='@MYSQLD_USER@' > +log_file=$(mktemp /tmp/wsrep_recovery.XXXXXX) > +euid=$(id -u) > +recovered_pos="" > +skipped="" > +start_pos="" > +start_pos_opt="" > +ret=0 > + > +log () > +{ > + local msg="$1" > + # Print all messages to stderr as we reserve stdout for printing > + # --wsrep-start-position=XXXX. > + echo "$msg" >&2 > +} > + > +finish() > +{ > + rm -f "$log_file" > +} > + > +trap finish EXIT > + > +# Safety checks > +if [ -z "$log_file" ]; then > + log "WSREP: mktemp failed" > + exit 1 > +fi > + > +if [ -f "$log_file" ]; then > + [ "$euid" = "0" ] && chown $user $log_file > + chmod 600 $log_file > +else > + log "WSREP: Failed to change the permissions of $log_file." I'd say it's rather mktemp failed than change permissions failed. > + exit 1 > +fi > + > +# Redirect server's error log to the log file. > +eval /usr/sbin/mysqld --user=$user --wsrep_recover 2> "$log_file" > +ret=$? > +if [ $ret -ne 0 ]; then > + # Something went wrong, let us also print the error log so that it > + # shows up in systemctl status output as a hint to the user. > + log "WSREP: Failed to start mysqld for wsrep recovery: '`cat $log_file`'" > + exit 1 > +fi Since this script is executed unconditionally, what shall happen if wsrep is not enabled at compile time (--wsrep_recover is not known)? Fail the whole service startup? > + > +# Parse server's error log for recovered position. The server prints > +# "..skipping position recovery.." if started without wsrep. > + > +recovered_pos="$(grep 'WSREP: Recovered position:' $log_file)" > + > +if [ -z "$recovered_pos" ]; then > + skipped="$(grep WSREP $log_file | grep 'skipping position recovery')" > + if [ -z "$skipped" ]; then > + log "WSREP: Failed to recover position: '`cat $log_file`'" > + exit 1 Can we come here with wsrep disabled? > + else > + log "WSREP: Position recovery skipped." > + fi > +else > + start_pos="$(echo $recovered_pos | sed 's/.*WSREP\:\ Recovered\ position://' \ > + | sed 's/^[ \t]*//')" > + log "WSREP: Recovered position $start_pos" > + start_pos_opt="--wsrep_start_position=$start_pos" > +fi > + > +echo "$start_pos_opt" > + > diff --git a/support-files/mariadb.service.in b/support-files/mariadb.service.in > index b18674b..00162d4 100644 > --- a/support-files/mariadb.service.in > +++ b/support-files/mariadb.service.in > @@ -48,6 +48,12 @@ CapabilityBoundingSet=CAP_IPC_LOCK > # Execute pre and post scripts as root, otherwise it does it as User= > PermissionsStartOnly=true > > +# Perform automatic wsrep recovery. When server is started without wsrep, > +# galera_recovery simply returns an empty string. In any case, however, > +# the script is not expected to return with a non-zero status. > +ExecStartPre=/bin/sh -c "VAR=`/usr/bin/galera_recovery`; [ $? -eq 0 ] && \ > + systemctl set-environment _WSREP_START_POSITION=$VAR || exit 1" I believe _WSREP_START_POSITION won't work with multi instance version. Not sure if it works but we may need to use something like _WSREP_START_POSITION%I here. > + > # Needed to create system tables etc. > # ExecStartPre=/usr/bin/mysql_install_db -u mysql > > @@ -57,9 +63,12 @@ PermissionsStartOnly=true > # This isn't a replacement for my.cnf. > # _WSREP_NEW_CLUSTER is for the exclusive use of the script galera_new_cluster > @SYSTEMD_EXECSTARTPRE@ > -ExecStart=/usr/sbin/mysqld $MYSQLD_OPTS $_WSREP_NEW_CLUSTER > +ExecStart=/usr/sbin/mysqld $MYSQLD_OPTS $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION > @SYSTEMD_EXECSTARTPOST@ > > +# Unset _WSREP_START_POSITION environment variable. > +ExecStartPost=/bin/sh -c "systemctl unset-environment _WSREP_START_POSITION" > + > KillMode=process > KillSignal=SIGTERM > > _______________________________________________ > commits mailing list > commits(a)mariadb.org > https://lists.askmonty.org/cgi-bin/mailman/listinfo/commits Regards, Sergey

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Re: [Maria-developers] [ME-585] Integrate existing Community Patch “Flashback” into MariaDB Server.
by Kristian Nielsen 26 May '16

26 May '16

Lixun Peng <lixun.peng(a)mariadb.com> writes: > Hi Kristian, > > I ported Flashback to MariaDB 10.1, could you please review this patch? Thanks for the patch. Some comments and questions below, inline in the patch. > [2. text/plain; ME-585.diff] > > commit 11421434433fb6a5160dae721f0ecb0549e4a5fe > Author: plinux <lixun.penglx(a)alibaba-inc.com> > Date: Wed May 25 19:46:43 2016 +0800 > > [ME-585] Integrate existing Community Patch “Flashback” into MariaDB Server. > > ==== Description ==== > > Flashback can roll-back the instances/databases/tables to a snapshot. > It's implement on Server-Level by full image format binary logs, so it supports all engines. > Currently, it’s a feature inside mysqlbinlog tool (with --flashback arguments). > > ==== New Arguments ==== > > --flashback (-B) > It will let mysqlbinlog to work on FLASHBACK mode. > > --table (-T) > It's similar with -d, but this argument is for specific tables. > > --review > It will let mysqlbinlog print the SQL for reviewing. > Reviewing feature will create a new "review" table to record the data that will be modified by FLASHBACK feature > If you don't set the --review-dbname/tablename, "review" table will created on current DB, and the table name will be "__original_table_name". And for getting the original table struct, mysqlbinlog need to connect mysql, so --user/--host/--password is necessary. > > --review-dbname > The DB name that you want to store the review table. > > --review-tablename > The TABLE name that you want to store the original data before modified. > Only if you set -T, this argument is useful. Nice documentation! Some suggestions for improvement: Maybe you could mention explicitly to what point the database is rolled back. I assume it is to the point at which mysqlbinlog would normally start dumping? I think it would be useful for users to have an explicit list of how the starting point may be specified (the most important probably being --start-datetime that you use in the examples). Also, what happens if one needs to flashback across multiple binlog files? What happens in the case of DDL (or other query_log_event)? I assume these cannot be flashback'ed. Will the tool stop with an error before doing anything? Will it stop with an error half-way, leaving a partial flashback? Or will it leave a corrupted state (row events flashed back, query event modifications kept)? It is not 100% clear to me what the --review feature does. Given table t1, does it create a table `__original_t1`, which contains the subset of rows of t1 that would be modified by flashback - basically the after image of all row events? There does not seem to be any test case for the --review option. Did you test this feature with binlog checksums enabled? What is the format for table name in --table and --review-tablename options? Is it DB.TABLE, where the quialifying DB is mandatory? This does not seem to be tested in the test case. Is it possible to flashback across multiple binlog files? What happens if the user attempts to use flashback with the option to fetch binlog files from the server rather than from local files? > > ==== Example ==== > > I have a table "t" in database "test", we can compare the output with --flashback and without. > #client/mysqlbinlog /data/mysqldata_10.0/binlog/mysql-bin.000001 -vv -d test -T t --start-datetime="2013-03-27 14:54:00" > /tmp/1.sql > #client/mysqlbinlog /data/mysqldata_10.0/binlog/mysql-bin.000001 -vv -uroot -d test -T t --start-datetime="2013-03-27 14:54:00" -B --review > /tmp/2.sql > > Then, importing the output flashback file, it can flashback your database/table to the special time. > > ==== Implement ==== > > 1. As we know, if binlog_format is ROW (binlog-row-image=FULL in 5.6 and later), all columns’ values are store in the row event, so we can get the data before mis-operation. > > 2. Just do following things: > 2.1 Change Event Type, INSERT->DELETE, DELETE->INSERT > 2.2 For Update_Event, swapping the SET part and WHERE part > 2.3 Applying those events from the last one to the first one which mis-operation happened. > 2.4 All the data will be recovered by inverse operations of mis-oprerations. > > diff --git a/client/client_priv.h b/client/client_priv.h > index c0c4954..31ad7df 100644 > --- a/client/client_priv.h > +++ b/client/client_priv.h > @@ -65,6 +65,8 @@ enum options_client > OPT_MYSQLDUMP_SLAVE_APPLY, > OPT_MYSQLDUMP_SLAVE_DATA, > OPT_MYSQLDUMP_INCLUDE_MASTER_HOST_PORT, > + OPT_REVIEW, > + OPT_REVIEW_DBNAME, OPT_REVIEW_TABLENAME, > OPT_SLAP_CSV, OPT_SLAP_CREATE_STRING, > OPT_SLAP_AUTO_GENERATE_SQL_LOAD_TYPE, OPT_SLAP_AUTO_GENERATE_WRITE_NUM, > OPT_SLAP_AUTO_GENERATE_ADD_AUTO, > diff --git a/client/mysqlbinlog.cc b/client/mysqlbinlog.cc > index da41268..969540e 100644 > --- a/client/mysqlbinlog.cc > +++ b/client/mysqlbinlog.cc > @@ -44,7 +44,6 @@ > #include <welcome_copyright_notice.h> // ORACLE_WELCOME_COPYRIGHT_NOTICE > > > -#include "sql_string.h" // needed for Rpl_filter Hm, why remove this include? I assume this is related to starting to use the `String' class in mysqlbinlog? I know there is quite a mess with mysqlbinlog.cc sharing parts of the server source code, so I could imagine something "interesting" going on here - can you explain, and probably put in a comment describing the issue? > #include "sql_list.h" // needed for Rpl_filter > #include "rpl_filter.h" > > @@ -63,6 +62,10 @@ Rpl_filter *binlog_filter= 0; > /* Needed for Rpl_filter */ > CHARSET_INFO* system_charset_info= &my_charset_utf8_general_ci; > > +/* Needed for Flashback */ > +DYNAMIC_ARRAY binlog_events; // Storing the events output string > +String stop_event_string; // Storing the STOP_EVENT output string > + > char server_version[SERVER_VERSION_LENGTH]; > ulong server_id = 0; > > @@ -86,7 +89,7 @@ static const char *load_groups[]= > static void error(const char *format, ...) ATTRIBUTE_FORMAT(printf, 1, 2); > static void warning(const char *format, ...) ATTRIBUTE_FORMAT(printf, 1, 2); > > -static bool one_database=0, to_last_remote_log= 0, disable_log_bin= 0; > +static bool one_database=0, one_table=0, to_last_remote_log= 0, disable_log_bin= 0; > static bool opt_hexdump= 0, opt_version= 0; > const char *base64_output_mode_names[]= > {"NEVER", "AUTO", "ALWAYS", "UNSPEC", "DECODE-ROWS", NullS}; > @@ -96,6 +99,7 @@ TYPELIB base64_output_mode_typelib= > static enum_base64_output_mode opt_base64_output_mode= BASE64_OUTPUT_UNSPEC; > static char *opt_base64_output_mode_str= NullS; > static char* database= 0; > +static char* table= 0; > static my_bool force_opt= 0, short_form= 0, remote_opt= 0; > static my_bool debug_info_flag, debug_check_flag; > static my_bool force_if_open_opt= 1; > @@ -129,6 +133,10 @@ static MYSQL* mysql = NULL; > static const char* dirname_for_local_load= 0; > static bool opt_skip_annotate_row_events= 0; > > +static my_bool opt_flashback; > +static my_bool opt_review; > +static char *review_dbname, *review_tablename; > + > /** > Pointer to the Format_description_log_event of the currently active binlog. > > @@ -788,6 +796,23 @@ print_skip_replication_statement(PRINT_EVENT_INFO *pinfo, const Log_event *ev) > } > > /** > + Indicates whether the given table should be filtered out, > + according to the --table=X option. > + > + @param log_tblname Name of table. > + > + @return nonzero if the table with the given name should be > + filtered out, 0 otherwise. > +*/ > +static bool shall_skip_table(const char *log_tblname) > +{ > + return one_table && > + (log_tblname != NULL) && > + strcmp(log_tblname, table); > +} > + > + > +/** > Prints the given event in base64 format. > > The header is printed to the head cache and the body is printed to > @@ -949,6 +974,10 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, > Exit_status retval= OK_CONTINUE; > IO_CACHE *const head= &print_event_info->head_cache; > > + /* Bypass flashback settings to event */ > + ev->is_flashback= opt_flashback; > + ev->need_review= opt_review; > + > /* > Format events are not concerned by --offset and such, we always need to > read them to be able to process the wanted events. > @@ -985,7 +1014,7 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, > retval= OK_STOP; > goto end; > } > - if (!short_form) > + if (!short_form && !opt_flashback) > fprintf(result_file, "# at %s\n",llstr(pos,ll_buff)); > > if (!opt_hexdump) > @@ -1210,12 +1239,123 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, > case TABLE_MAP_EVENT: > { > Table_map_log_event *map= ((Table_map_log_event *)ev); > - if (shall_skip_database(map->get_db_name())) > + if (shall_skip_database(map->get_db_name()) || > + shall_skip_table(map->get_table_name())) > { > print_event_info->m_table_map_ignored.set_table(map->get_table_id(), map); > destroy_evt= FALSE; > goto end; > } > + /* Create review table for Flashback */ > + if (opt_review) > + { > + // Check table has created or not ^^^ "Check if the table was already created" ? > + Table_map_log_event *exist_table; > + exist_table= print_event_info->m_table_map.get_table(map->get_table_id()); > + > + if (!exist_table) > + { > + > + MYSQL *conn; > + MYSQL_RES *res; > + MYSQL_ROW row; > + char tmp_sql[8096]; > + int tmp_sql_offset; > + > + conn = mysql_init(NULL); > + if (!mysql_real_connect(conn, host, user, pass, > + map->get_db_name(), port, sock, 0)) > + { > + fprintf(stderr, "%s\n", mysql_error(conn)); > + exit(1); > + } > + > + if (mysql_query(conn, "SET group_concat_max_len=10000;")) > + { > + fprintf(stderr, "%s\n", mysql_error(conn)); > + exit(1); > + } > + > + memset(tmp_sql, 0, sizeof(tmp_sql)); > + sprintf(tmp_sql, " " > + "SELECT Group_concat(cols) " What happens if Group_concat() truncates the result? Maybe you need to first determine the maximum size, and SET SESSION group_concat_max_len accordingly. Or alternatively, you could just select each column as a row, and do the concatenation in the C code. > + "FROM (SELECT 'op_type char(1)' cols " > + " UNION ALL " > + " SELECT Concat(column_name, '_old ', column_type, ' ', " > + " IF(character_set_name IS NOT NULL, " > + " Concat('character set ', character_set_name, ' '), ' '), " > + " IF(collation_name IS NOT NULL, " > + " Concat('collate ', collation_name, ' '), ' ')) cols " > + " FROM information_schema.columns " > + " WHERE table_schema = '%s' " > + " AND table_name = '%s' " This is vulnerable to sql injection. You need to use proper quoting functions. Also, the generated statement does not seem to work correctly if column names contain special characters. You should add test cases that tests this - table names with ' ` " \n characters in them, as well as column names. > + " UNION ALL " > + " SELECT Concat(column_name, '_new ', column_type, ' ', " > + " IF(character_set_name IS NOT NULL, " > + " Concat('character set ', character_set_name, ' '), ' '), " > + " IF(collation_name IS NOT NULL, " > + " Concat('collate ', collation_name, ' '), ' ')) cols " > + " FROM information_schema.columns " > + " WHERE table_schema = '%s' " > + " AND table_name = '%s') tmp;", > + map->get_db_name(), map->get_table_name(), > + map->get_db_name(), map->get_table_name()); > + > + if (mysql_query(conn, tmp_sql)) > + { > + fprintf(stderr, "%s\n", mysql_error(conn)); > + exit(1); > + } > + res = mysql_use_result(conn); > + if ((row = mysql_fetch_row(res)) != NULL) // only one row > + { > + if (review_dbname) > + { > + ev->set_review_dbname(review_dbname); > + } > + else > + { > + ev->set_review_dbname(map->get_db_name()); > + } > + if (review_tablename) > + { > + ev->set_review_tablename(review_tablename); > + } > + else > + { > + memset(tmp_sql, 0, sizeof(tmp_sql)); > + sprintf(tmp_sql, "__%s", map->get_table_name()); > + ev->set_review_tablename(tmp_sql); > + } > + memset(tmp_sql, 0, sizeof(tmp_sql)); > + tmp_sql_offset= sprintf(tmp_sql, "CREATE TABLE IF NOT EXISTS"); > + tmp_sql_offset+= sprintf(tmp_sql + tmp_sql_offset, " `%s`.`%s` (%s) Engine = InnoDB%s", > + ev->get_review_dbname(), ev->get_review_tablename(), row[0], print_event_info->delimiter); > + } > + fprintf(result_file, "%s\n", tmp_sql); > + mysql_free_result(res); > + mysql_close(conn); > + } > + else > + { > + char tmp_str[128]; > + > + if (review_dbname) > + ev->set_review_dbname(review_dbname); > + else > + ev->set_review_dbname(map->get_db_name()); > + > + if (review_tablename) > + ev->set_review_tablename(review_tablename); > + else > + { > + memset(tmp_str, 0, sizeof(tmp_str)); > + sprintf(tmp_str, "__%s", map->get_table_name()); > + ev->set_review_tablename(tmp_str); > + } > + } > + } > + > /* > The Table map is to be printed, so it's just the time when we may > print the kept Annotate event (if there is any). > @@ -1281,6 +1421,41 @@ Exit_status process_event(PRINT_EVENT_INFO *print_event_info, Log_event *ev, > */ > if (ev) > { > + /* Holding event output if needed */ > + if (!ev->output_buf.is_empty()) > + { > + String *tmp_str = new String[1]; > + > + //if (!short_form && opt_flashback) > + //{ > + // tmp_str->append("# at "); > + // tmp_str->append(llstr(pos,ll_buff)); > + // tmp_str->append("\n"); > + //} What is this? If it is not needed, remove rather than leaving stray commented-out code. > + tmp_str->append(ev->output_buf); > + > + if (opt_flashback) > + { > + if (ev_type == STOP_EVENT) > + stop_event_string.copy(*tmp_str); What makes STOP_EVENT special? I don't understand the logic in the code here. > + else > + (void) push_dynamic(&binlog_events, (uchar *) tmp_str); > + } > + else > + { > + fprintf(result_file, "%s", tmp_str->ptr()); > + delete tmp_str; > + } > + ev->free_output_buffer(); > + } > + //else > + //{ > + // if (!short_form && opt_flashback) > + // fprintf(result_file, "# at %s\n",llstr(pos,ll_buff)); > + //} Same about commented-out code. > + > + if (remote_opt) > + ev->temp_buf= 0; > if (destroy_evt) /* destroy it later if not set (ignored table map) */ > delete ev; > } > @@ -1339,6 +1514,11 @@ static struct my_option my_options[] = > "already have. NOTE: you will need a SUPER privilege to use this option.", > &disable_log_bin, &disable_log_bin, 0, GET_BOOL, > NO_ARG, 0, 0, 0, 0, 0, 0}, > + {"flashback", 'B', "Flashback feature can rollback you committed data to a special time point," > + "before Flashback feature writing a row, original row can insert to review-dbname.review-tablename," > + "and mysqlbinlog will login mysql by user(-u) and password(-p) and host(-h).", > + &opt_flashback, &opt_flashback, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, > + 0, 0}, > {"force-if-open", 'F', "Force if binlog was not closed properly.", > &force_if_open_opt, &force_if_open_opt, 0, GET_BOOL, NO_ARG, > 1, 0, 0, 0, 0, 0}, > @@ -1382,6 +1562,17 @@ static struct my_option my_options[] = > "prefix for the file names.", > &result_file_name, &result_file_name, 0, GET_STR, REQUIRED_ARG, > 0, 0, 0, 0, 0, 0}, > + {"review", OPT_REVIEW, "Print review sql in output file.", > + &opt_review, &opt_review, 0, GET_BOOL, NO_ARG, 0, 0, 0, 0, > + 0, 0}, > + {"review-dbname", OPT_REVIEW_DBNAME, > + "Writing flashback original row data into this db", > + &review_dbname, &review_dbname, > + 0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, > + {"review-tablename", OPT_REVIEW_TABLENAME, > + "Writing flashback original row data into this table", > + &review_tablename, &review_tablename, > + 0, GET_STR_ALLOC, REQUIRED_ARG, 0, 0, 0, 0, 0, 0}, > {"server-id", 0, > "Extract only binlog entries created by the server having the given id.", > &server_id, &server_id, 0, GET_ULONG, > @@ -1445,6 +1636,9 @@ static struct my_option my_options[] = > &stop_position, &stop_position, 0, GET_ULL, > REQUIRED_ARG, (longlong)(~(my_off_t)0), BIN_LOG_HEADER_SIZE, > (ulonglong)(~(my_off_t)0), 0, 0, 0}, > + {"table", 'T', "List entries for just this table (local log only).", > + &table, &table, 0, GET_STR_ALLOC, REQUIRED_ARG, > + 0, 0, 0, 0, 0, 0}, > {"to-last-log", 't', "Requires -R. Will not stop at the end of the \ > requested binlog but rather continue printing until the end of the last \ > binlog of the MySQL server. If you send the output to the same MySQL server, \ > @@ -1554,6 +1748,7 @@ static void cleanup() > { > my_free(pass); > my_free(database); > + my_free(table); > my_free(host); > my_free(user); > my_free(const_cast<char*>(dirname_for_local_load)); > @@ -1624,6 +1819,9 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)), > break; > #endif > #include <sslopt-case.h> > + case 'B': > + opt_flashback= 1; > + break; > case 'd': > one_database = 1; > break; > @@ -1645,10 +1843,16 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)), > case 'R': > remote_opt= 1; > break; > + case 'T': > + one_table= 1; > + break; > case OPT_MYSQL_PROTOCOL: > opt_protocol= find_type_or_exit(argument, &sql_protocol_typelib, > opt->name); > break; > + case OPT_REVIEW: > + opt_review= 1; > + break; > case OPT_START_DATETIME: > start_datetime= convert_str_to_timestamp(start_datetime_str); > break; > @@ -1848,7 +2052,7 @@ static Exit_status dump_log_entries(const char* logname) > dump_local_log_entries(&print_event_info, logname)); > > /* Set delimiter back to semicolon */ > - if (!opt_raw_mode) > + if (!opt_raw_mode && !opt_flashback) > fprintf(result_file, "DELIMITER ;\n"); > strmov(print_event_info.delimiter, ";"); > return rc; > @@ -2648,6 +2852,8 @@ int main(int argc, char** argv) > DBUG_ENTER("main"); > DBUG_PROCESS(argv[0]); > > + (void) my_init_dynamic_array(&binlog_events, sizeof(String), 1024, 1024, MYF(0)); > + > my_init_time(); // for time functions > tzset(); // set tzname > > @@ -2784,6 +2990,35 @@ int main(int argc, char** argv) > start_position= BIN_LOG_HEADER_SIZE; > } > > + /* If enable flashback, need to print the events from the end to the beginning */ > + if(opt_flashback) > + { > + ///if (binlog_events.elements > 0) > + ///{ > + /// String *event_str= dynamic_element(&binlog_events, 0, String*); > + /// fprintf(result_file, "%s", event_str->ptr()); > + /// delete event_str; > + /// delete_dynamic_element(&binlog_events, 0); > + ///} Same about commented-out code. > + uint i= 0; > + for (i= binlog_events.elements; i > 0; --i) > + { > + String *event_str= dynamic_element(&binlog_events, i - 1, String*); > + fprintf(result_file, "%s", event_str->ptr()); > + delete event_str; > + delete_dynamic_element(&binlog_events, i - 1); > + } > + fprintf(result_file, "COMMIT\n/*!*/;\n"); > + } Hm, so the entire output from flashback needs to be stored in RAM. I guess it is a reasonable limitation. But I think it should be documented, so users will be aware of this, and can eg. cut a large flashback into smaller pieces, if needed. But you don't seem to check the return value from push_dynamic() ? That seems a requirement to do, and give an appropriate error message for out-of-memory. (Though probably most often the OOM killer will get to it first...). > + > + /* Set delimiter back to semicolon */ > + if (!stop_event_string.is_empty()) > + fprintf(result_file, "%s", stop_event_string.ptr()); > + if (opt_flashback) > + fprintf(result_file, "DELIMITER ;\n"); > + > + delete_dynamic(&binlog_events); > + > if (!opt_raw_mode) > { > /* > diff --git a/include/my_sys.h b/include/my_sys.h > index 36530eb..4989f95 100644 > --- a/include/my_sys.h > +++ b/include/my_sys.h > @@ -609,6 +609,7 @@ static inline size_t my_b_bytes_in_cache(const IO_CACHE *info) > } > > int my_b_copy_to_file(IO_CACHE *cache, FILE *file); > +char* my_b_copy_to_string(IO_CACHE *cache, size_t *bytes_in_cache); // Used for Flashback Why this addition? It does not seem to be used anywhere else in the patch? > my_off_t my_b_append_tell(IO_CACHE* info); > my_off_t my_b_safe_tell(IO_CACHE* info); /* picks the correct tell() */ > int my_b_pread(IO_CACHE *info, uchar *Buffer, size_t Count, my_off_t pos); > diff --git a/mysql-test/suite/binlog/r/mysqlbinlog_row_flashback.result b/mysql-test/suite/binlog/r/mysqlbinlog_row_flashback.result > new file mode 100644 > index 0000000..c7c3493 > --- /dev/null > +++ b/mysql-test/suite/binlog/r/mysqlbinlog_row_flashback.result > @@ -0,0 +1,459 @@ > +SET binlog_format= ROW; > +# > +# Preparatory cleanup. > +# > +DROP TABLE IF EXISTS t1; > +# > +# We need a fixed timestamp to avoid varying results. > +# > +SET timestamp=1000000000; > +# > +# Delete all existing binary logs. > +# > +RESET MASTER; > +CREATE TABLE t1 ( > +c01 tinyint, > +c02 smallint, > +c03 mediumint, > +c04 int, > +c05 bigint, > +c06 char(10), > +c07 varchar(20), > +c08 TEXT > +); > +# > +# Insert data to t1 > +# > +INSERT INTO t1 VALUES(0,0,0,0,0,'','',''); > +INSERT INTO t1 VALUES(1,2,3,4,5, "abc", "abcdefg", "abcedfghijklmnopqrstuvwxyz"); > +INSERT INTO t1 VALUES(127, 32767, 8388607, 2147483647, 9223372036854775807, repeat('a', 10), repeat('a', 20), repeat('a', 65535)); > +# > +# Update t1 > +# > +UPDATE t1 SET c01=100 WHERE c02=0 OR c03=3; > +# > +# Clear t1 > +# > +DELETE FROM t1; > +FLUSH LOGS; > +# > +# Without -B > +# > +/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/; > +/*!40019 SET @@session.max_insert_delayed_threads=0*/; > +/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; > +DELIMITER /*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Start: binlog v 4, server v #.##.## created 010909 9:46:40 at startup > +ROLLBACK/*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Gtid list [] > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Binlog checkpoint master-bin.000001 > +# at # > +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-1 ddl > +/*!100101 SET @@session.skip_parallel_replication=0*//*!*/; > +/*!100001 SET @@session.gtid_domain_id=0*//*!*/; > +/*!100001 SET @@session.server_id=1*//*!*/; > +/*!100001 SET @@session.gtid_seq_no=1*//*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 > +use `test`/*!*/; > +SET TIMESTAMP=1000000000/*!*/; > +SET @@session.pseudo_thread_id=#/*!*/; > +SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/; > +SET @@session.sql_mode=1342177280/*!*/; > +SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/; > +/*!\C latin1 *//*!*/; > +SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/; > +SET @@session.lc_time_names=0/*!*/; > +SET @@session.collation_database=DEFAULT/*!*/; > +CREATE TABLE t1 ( > +c01 tinyint, > +c02 smallint, > +c03 mediumint, > +c04 int, > +c05 bigint, > +c06 char(10), > +c07 varchar(20), > +c08 TEXT > +) > +/*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-2 > +/*!100001 SET @@session.gtid_seq_no=2*//*!*/; > +BEGIN > +/*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Write_rows: table id # flags: STMT_END_F > +### INSERT INTO `test`.`t1` > +### SET > +### @1=0 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 > +SET TIMESTAMP=1000000000/*!*/; > +COMMIT > +/*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-3 > +/*!100001 SET @@session.gtid_seq_no=3*//*!*/; > +BEGIN > +/*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Write_rows: table id # flags: STMT_END_F > +### INSERT INTO `test`.`t1` > +### SET > +### @1=1 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 > +SET TIMESTAMP=1000000000/*!*/; > +COMMIT > +/*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-4 > +/*!100001 SET @@session.gtid_seq_no=4*//*!*/; > +BEGIN > +/*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Write_rows: table id # flags: STMT_END_F > +### INSERT INTO `test`.`t1` > +### SET > +### @1=127 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=32767 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=8388607 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=2147483647 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=9223372036854775807 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='aaaaaaaaaa' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='aaaaaaaaaaaaaaaaaaaa' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa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/* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 > +SET TIMESTAMP=1000000000/*!*/; > +COMMIT > +/*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-5 > +/*!100001 SET @@session.gtid_seq_no=5*//*!*/; > +BEGIN > +/*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Update_rows: table id # flags: STMT_END_F > +### UPDATE `test`.`t1` > +### WHERE > +### @1=0 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +### SET > +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +### UPDATE `test`.`t1` > +### WHERE > +### @1=1 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +### SET > +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 > +SET TIMESTAMP=1000000000/*!*/; > +COMMIT > +/*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-6 > +/*!100001 SET @@session.gtid_seq_no=6*//*!*/; > +BEGIN > +/*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # > +# at # > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Delete_rows: table id # > +#010909 9:46:40 server id 1 end_log_pos # Delete_rows: table id # flags: STMT_END_F > +### DELETE FROM `test`.`t1` > +### WHERE > +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +### DELETE FROM `test`.`t1` > +### WHERE > +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +### DELETE FROM `test`.`t1` > +### WHERE > +### @1=127 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=32767 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=8388607 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=2147483647 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=9223372036854775807 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='aaaaaaaaaa' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='aaaaaaaaaaaaaaaaaaaa' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### 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/* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 > +SET TIMESTAMP=1000000000/*!*/; > +COMMIT > +/*!*/; > +# at # > +#010909 9:46:40 server id 1 end_log_pos # Rotate to master-bin.000002 pos: 4 > +DELIMITER ; > +# End of log file > +ROLLBACK /* added by mysqlbinlog */; > +/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; > +/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/; > +# > +# With -B > +# > +/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=1*/; > +/*!40019 SET @@session.max_insert_delayed_threads=0*/; > +/*!50003 SET @OLD_COMPLETION_TYPE=@@COMPLETION_TYPE,COMPLETION_TYPE=0*/; > +DELIMITER /*!*/; > +#010909 9:46:40 server id 1 end_log_pos # Start: binlog v 4, server v #.##.## created 010909 9:46:40 at startup > +ROLLBACK/*!*/; > +#010909 9:46:40 server id 1 end_log_pos # Gtid list [] > +#010909 9:46:40 server id 1 end_log_pos # Binlog checkpoint master-bin.000001 > +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-1 ddl > +/*!100101 SET @@session.skip_parallel_replication=0*//*!*/; > +/*!100001 SET @@session.gtid_domain_id=0*//*!*/; > +/*!100001 SET @@session.server_id=1*//*!*/; > +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-2 > +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # > +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-3 > +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # > +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-4 > +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # > +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-5 > +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # > +#010909 9:46:40 server id 1 end_log_pos # GTID 0-1-6 > +#010909 9:46:40 server id 1 end_log_pos # Table_map: `test`.`t1` mapped to number # Hm, what are these? Are they left-overs from reading forward over the binlog prior to emitting flashback operations? If these are just comments, I suppose they are not harmful, but they might be confusing? It seems the rows_log_event and xid_events are filtered out, maybe the table_map and gtid events should also not be printed in -B mode? > +#010909 9:46:40 server id 1 end_log_pos # Rotate to master-bin.000002 pos: 4 > +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 > +SET TIMESTAMP=1000000000/*!*/; > +BEGIN > +/*!*/; > +#010909 9:46:40 server id 1 end_log_pos # Delete_rows: table id # > +#010909 9:46:40 server id 1 end_log_pos # Delete_rows: table id # flags: STMT_END_F Again, why these Delete_rows comments? Do I understand correctly, that in the "normal" output, this would be BINLOG statements, where the events are changed INSERT<->DELETE and so on? Maybe these comments should be changed as well, to avoid confusion. > +### INSERT INTO `test`.`t1` > +### SET > +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +### INSERT INTO `test`.`t1` > +### SET > +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +### INSERT INTO `test`.`t1` > +### SET > +### @1=127 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=32767 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=8388607 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=2147483647 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=9223372036854775807 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='aaaaaaaaaa' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='aaaaaaaaaaaaaaaaaaaa' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa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/* BLOB/TEXT meta=2 nullable=1 is_null=0 */ So it looks like the flashback events are output in the same order that they were originally executed? Doesn't it need to be in the reverse order? I am thinking in particular of transactions that UPDATE the same row multiple times. For example: BEGIN; UPDATE t1 SET a=3 WHERE a=2 AND pk=1; UPDATE t1 SET a=4 WHERE a=3 AND pk=1; COMMIT; This needs to appear in the flashback output in the reverse order: BEGIN; UPDATE t1 SET a=3 WHERE a=4 AND pk=1; UPDATE t1 SET a=2 WHERE a=3 AND pk=1; COMMIT; If flashback'ed in the same order as originally executed, it would leave the wrong value "3" in a (or maybe fail with a "cannot find row" error). In any case, I think a test case for this should be added. > +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 > +SET TIMESTAMP=1000000000/*!*/; > +BEGIN > +/*!*/; > +#010909 9:46:40 server id 1 end_log_pos # Update_rows: table id # flags: STMT_END_F > +### UPDATE `test`.`t1` > +### WHERE > +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +### SET > +### @1=1 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +### UPDATE `test`.`t1` > +### WHERE > +### @1=100 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +### SET > +### @1=0 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 So this Query event was originally the COMMIT event, right? Shouldn't there be a COMMIT in the flashback output also? The test case seems to use MyISAM. Probably there should be also tests with InnoDB (maybe a good idea to have both a t1 MyISAM and a t2 InnoDB, to test mixing them, also testing mixed MyISAM/InnoDB transactions). > +SET TIMESTAMP=1000000000/*!*/; > +BEGIN > +/*!*/; > +#010909 9:46:40 server id 1 end_log_pos # Write_rows: table id # flags: STMT_END_F > +### DELETE FROM `test`.`t1` > +### WHERE > +### @1=127 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=32767 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=8388607 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=2147483647 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=9223372036854775807 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='aaaaaaaaaa' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='aaaaaaaaaaaaaaaaaaaa' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa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/* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 > +SET TIMESTAMP=1000000000/*!*/; > +BEGIN > +/*!*/; > +#010909 9:46:40 server id 1 end_log_pos # Write_rows: table id # flags: STMT_END_F > +### DELETE FROM `test`.`t1` > +### WHERE > +### @1=1 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=2 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=3 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=4 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=5 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='abc' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='abcdefg' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='abcedfghijklmnopqrstuvwxyz' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 > +SET TIMESTAMP=1000000000/*!*/; > +BEGIN > +/*!*/; > +#010909 9:46:40 server id 1 end_log_pos # Write_rows: table id # flags: STMT_END_F > +### DELETE FROM `test`.`t1` > +### WHERE > +### @1=0 /* TINYINT meta=0 nullable=1 is_null=0 */ > +### @2=0 /* SHORTINT meta=0 nullable=1 is_null=0 */ > +### @3=0 /* MEDIUMINT meta=0 nullable=1 is_null=0 */ > +### @4=0 /* INT meta=0 nullable=1 is_null=0 */ > +### @5=0 /* LONGINT meta=0 nullable=1 is_null=0 */ > +### @6='' /* STRING(10) meta=65034 nullable=1 is_null=0 */ > +### @7='' /* VARSTRING(20) meta=20 nullable=1 is_null=0 */ > +### @8='' /* BLOB/TEXT meta=2 nullable=1 is_null=0 */ > +#010909 9:46:40 server id 1 end_log_pos # Query thread_id=# exec_time=# error_code=0 > +use `test`/*!*/; > +SET TIMESTAMP=1000000000/*!*/; > +SET @@session.pseudo_thread_id=#/*!*/; > +SET @@session.foreign_key_checks=1, @@session.sql_auto_is_null=0, @@session.unique_checks=1, @@session.autocommit=1/*!*/; > +SET @@session.sql_mode=1342177280/*!*/; > +SET @@session.auto_increment_increment=1, @@session.auto_increment_offset=1/*!*/; > +/*!\C latin1 *//*!*/; > +SET @@session.character_set_client=8,@@session.collation_connection=8,@@session.collation_server=8/*!*/; > +SET @@session.lc_time_names=0/*!*/; > +SET @@session.collation_database=DEFAULT/*!*/; > +COMMIT > +/*!*/; > +DELIMITER ; > +# End of log file > +ROLLBACK /* added by mysqlbinlog */; > +/*!50003 SET COMPLETION_TYPE=@OLD_COMPLETION_TYPE*/; > +/*!50530 SET @@SESSION.PSEUDO_SLAVE_MODE=0*/; > +# > +# Insert data to t1 > +# > +TRUNCATE TABLE t1; > +INSERT INTO t1 VALUES(0,0,0,0,0,'','',''); > +INSERT INTO t1 VALUES(1,2,3,4,5, "abc", "abcdefg", "abcedfghijklmnopqrstuvwxyz"); > +INSERT INTO t1 VALUES(127, 32767, 8388607, 2147483647, 9223372036854775807, repeat('a', 10), repeat('a', 20), repeat('a', 60)); > +# > +# Delete all existing binary logs. > +# > +RESET MASTER; > +SELECT * FROM t1; > +c01 c02 c03 c04 c05 c06 c07 c08 > +0 0 0 0 0 > +1 2 3 4 5 abc abcdefg abcedfghijklmnopqrstuvwxyz > +127 32767 8388607 2147483647 9223372036854775807 aaaaaaaaaa aaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa > +# > +# Operate some data > +# > +UPDATE t1 SET c01=20; > +UPDATE t1 SET c02=200; > +UPDATE t1 SET c03=2000; > +DELETE FROM t1; > +FLUSH LOGS; > +# > +# With -B > +# > +SELECT * FROM t1; > +c01 c02 c03 c04 c05 c06 c07 c08 > +127 32767 8388607 2147483647 9223372036854775807 aaaaaaaaaa aaaaaaaaaaaaaaaaaaaa aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa > +0 0 0 0 0 > +1 2 3 4 5 abc abcdefg abcedfghijklmnopqrstuvwxyz > +DROP TABLE t1; > diff --git a/mysql-test/suite/binlog/t/mysqlbinlog_row_flashback.test b/mysql-test/suite/binlog/t/mysqlbinlog_row_flashback.test > new file mode 100644 > index 0000000..eb0f14f > --- /dev/null > +++ b/mysql-test/suite/binlog/t/mysqlbinlog_row_flashback.test > @@ -0,0 +1,110 @@ > +SET binlog_format= ROW; This should not be needed, since you have the proper have_binlog_format_row.inc. Or is there some specific reason it is needed, and if so, what? > + > +--source include/have_log_bin.inc > +--source include/have_binlog_format_row.inc > + > +--echo # > +--echo # Preparatory cleanup. > +--echo # > +--disable_warnings > +DROP TABLE IF EXISTS t1; > +--enable_warnings > + > +--echo # > +--echo # We need a fixed timestamp to avoid varying results. > +--echo # > +SET timestamp=1000000000; > + > +--echo # > +--echo # Delete all existing binary logs. > +--echo # > +RESET MASTER; > + > + > +CREATE TABLE t1 ( > + c01 tinyint, > + c02 smallint, > + c03 mediumint, > + c04 int, > + c05 bigint, > + c06 char(10), > + c07 varchar(20), > + c08 TEXT > +); > + > +--echo # > +--echo # Insert data to t1 > +--echo # > +INSERT INTO t1 VALUES(0,0,0,0,0,'','',''); > +INSERT INTO t1 VALUES(1,2,3,4,5, "abc", "abcdefg", "abcedfghijklmnopqrstuvwxyz"); > +INSERT INTO t1 VALUES(127, 32767, 8388607, 2147483647, 9223372036854775807, repeat('a', 10), repeat('a', 20), repeat('a', 65535)); > + > + > +--echo # > +--echo # Update t1 > +--echo # > +UPDATE t1 SET c01=100 WHERE c02=0 OR c03=3; > + > +--echo # > +--echo # Clear t1 > +--echo # > +DELETE FROM t1; > + > +FLUSH LOGS; > + > +--echo # > +--echo # Without -B > +--echo # > + > +let $MYSQLD_DATADIR= `select @@datadir`; > +--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR > +--replace_regex /SQL_LOAD_MB-[0-9]-[0-9]/SQL_LOAD_MB-#-#/ /exec_time=[0-9]*/exec_time=#/ /end_log_pos [0-9]*/end_log_pos #/ /# at [0-9]*/# at #/ /thread_id=[0-9]*/thread_id=#/ /table id [0-9]*/table id #/ /mapped to number [0-9]*/mapped to number #/ /server v [^ ]*/server v #.##.##/ /((a)[0-9]*=[0-9]*[.][0-9]{1,3})[0-9e+-]*[^ ]*(.*(FLOAT|DOUBLE).*[*].)/\1...\2/ > +--exec $MYSQL_BINLOG --base64-output=decode-rows -v -v $MYSQLD_DATADIR/master-bin.000001 > + > +--echo # > +--echo # With -B > +--echo # > + > +let $MYSQLD_DATADIR= `select @@datadir`; > +--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR > +--replace_regex /SQL_LOAD_MB-[0-9]-[0-9]/SQL_LOAD_MB-#-#/ /exec_time=[0-9]*/exec_time=#/ /end_log_pos [0-9]*/end_log_pos #/ /# at [0-9]*/# at #/ /thread_id=[0-9]*/thread_id=#/ /table id [0-9]*/table id #/ /mapped to number [0-9]*/mapped to number #/ /server v [^ ]*/server v #.##.##/ /((a)[0-9]*=[0-9]*[.][0-9]{1,3})[0-9e+-]*[^ ]*(.*(FLOAT|DOUBLE).*[*].)/\1...\2/ > +--exec $MYSQL_BINLOG -B --base64-output=decode-rows -v -v $MYSQLD_DATADIR/master-bin.000001 > + > +--echo # > +--echo # Insert data to t1 > +--echo # > +TRUNCATE TABLE t1; > +INSERT INTO t1 VALUES(0,0,0,0,0,'','',''); > +INSERT INTO t1 VALUES(1,2,3,4,5, "abc", "abcdefg", "abcedfghijklmnopqrstuvwxyz"); > +INSERT INTO t1 VALUES(127, 32767, 8388607, 2147483647, 9223372036854775807, repeat('a', 10), repeat('a', 20), repeat('a', 60)); > + > +--echo # > +--echo # Delete all existing binary logs. > +--echo # > +RESET MASTER; > +SELECT * FROM t1; > + > +--echo # > +--echo # Operate some data > +--echo # > + > +UPDATE t1 SET c01=20; > +UPDATE t1 SET c02=200; > +UPDATE t1 SET c03=2000; > + > +DELETE FROM t1; > + > +FLUSH LOGS; > + > +--echo # > +--echo # With -B > +--echo # > + > +let $MYSQLD_DATADIR= `select @@datadir`; > +--replace_result $MYSQLTEST_VARDIR MYSQLTEST_VARDIR > +--exec $MYSQL_BINLOG -B -vv $MYSQLD_DATADIR/master-bin.000001 > $MYSQLTEST_VARDIR/tmp/mysqlbinlog_row_flashback.sql > +--exec $MYSQL -e "SET binlog_format= ROW; source $MYSQLTEST_VARDIR/tmp/mysqlbinlog_row_flashback.sql;" > + > +SELECT * FROM t1; > + > +DROP TABLE t1; > diff --git a/sql/log_event.cc b/sql/log_event.cc > index ea0afdd..4cf54d3 100644 > --- a/sql/log_event.cc > +++ b/sql/log_event.cc > @@ -299,17 +299,28 @@ class Write_on_release_cache > constructor, but it would be possible to create a subclass > holding the IO_CACHE itself. > */ > - Write_on_release_cache(IO_CACHE *cache, FILE *file, flag_set flags = 0) > - : m_cache(cache), m_file(file), m_flags(flags) > + Write_on_release_cache(IO_CACHE *cache, FILE *file, flag_set flags = 0, Log_event *ev = NULL) > + : m_cache(cache), m_file(file), m_flags(flags), m_ev(ev) > { > reinit_io_cache(m_cache, WRITE_CACHE, 0L, FALSE, TRUE); > } > > ~Write_on_release_cache() > { > - copy_event_cache_to_file_and_reinit(m_cache, m_file); > - if (m_flags & FLUSH_F) > - fflush(m_file); > + if(m_ev == NULL) > + { > + copy_event_cache_to_file_and_reinit(m_cache, m_file); > + if (m_flags | FLUSH_F) > + fflush(m_file); > + } > + else // if m_ev<>NULL, then storing the output in output_buf > + { > + size_t bytes_in_cache= 0; > + char *buff= 0; > + buff= copy_event_cache_to_string_and_reinit(m_cache, &bytes_in_cache); > + m_ev->output_buf.append(buff, bytes_in_cache); > + my_free(buff); > + } > } > > /* > @@ -339,6 +350,7 @@ class Write_on_release_cache > IO_CACHE *m_cache; > FILE *m_file; > flag_set m_flags; > + Log_event *m_ev; // Used for Flashback > }; > > /* > @@ -2356,7 +2368,7 @@ log_event_print_value(IO_CACHE *file, const uchar *ptr, > d= (ulong) (i64 / 1000000); > t= (ulong) (i64 % 1000000); > > - my_b_printf(file, "%04d-%02d-%02d %02d:%02d:%02d", > + my_b_printf(file, "'%04d-%02d-%02d %02d:%02d:%02d'", > (int) (d / 10000), (int) (d % 10000) / 100, (int) (d % 100), > (int) (t / 10000), (int) (t % 10000) / 100, (int) t % 100); Why is this change needed? Maybe it is so that SQL output for --review can work? There does not seem to be any test case for this, should probably be added. > return 8; > @@ -2590,22 +2602,29 @@ size_t > Rows_log_event::print_verbose_one_row(IO_CACHE *file, table_def *td, > PRINT_EVENT_INFO *print_event_info, > MY_BITMAP *cols_bitmap, > - const uchar *value, const uchar *prefix) > + const uchar *value, const uchar *prefix, > + const my_bool only_parse) Can you come up with a better name for "only_parse"? It is not clear to me what it means, I think it is an option if the function needs to instead generate the SQL for filling-in the flashback review table? > { > const uchar *value0= value; > const uchar *null_bits= value; > uint null_bit_index= 0; > char typestr[64]= ""; > - > + > + /* Storing the review SQL */ "Storing the SQL for filling in the flashback review table" would be easier to understand. > + IO_CACHE *review_sql= &print_event_info->review_sql_cache; > + uchar *begin_pos; > + size_t bytes_in_cache; > + > /* > Skip metadata bytes which gives the information about nullabity of master > columns. Master writes one bit for each affected column. > */ > > value+= (bitmap_bits_set(cols_bitmap) + 7) / 8; > - > - my_b_printf(file, "%s", prefix); > - > + > + if (!only_parse) > + my_b_printf(file, "%s", prefix); > + > for (size_t i= 0; i < td->size(); i ++) > { > size_t size; > @@ -2614,8 +2633,10 @@ Rows_log_event::print_verbose_one_row(IO_CACHE *file, table_def *td, > > if (bitmap_is_set(cols_bitmap, i) == 0) > continue; > - > - my_b_printf(file, "### @%d=", static_cast<int>(i + 1)); > + > + if (!only_parse) > + my_b_printf(file, "### @%d=", static_cast<int>(i + 1)); > + > if (!is_null) > { > size_t fsize= td->calc_field_size((uint)i, (uchar*) value); > @@ -2627,9 +2648,67 @@ Rows_log_event::print_verbose_one_row(IO_CACHE *file, table_def *td, > return 0; > } > } > - if (!(size= log_event_print_value(file,is_null? NULL: value, > - td->type(i), td->field_metadata(i), > - typestr, sizeof(typestr)))) > + > + if (!only_parse) > + { > + begin_pos= file->write_pos; > + size= log_event_print_value(file,is_null? NULL: value, > + td->type(i), td->field_metadata(i), > + typestr, sizeof(typestr)); > + > + if (need_review) > + { > + String tmp_str, hex_str; > + IO_CACHE tmp_cache; > + char *buff; > + > + // Using a tmp IO_CACHE to get the value output > + open_cached_file(&tmp_cache, NULL, NULL, 0, MYF(MY_WME | MY_NABP)); > + size= log_event_print_value(&tmp_cache, is_null? NULL: value, > + td->type(i), td->field_metadata(i), > + typestr, sizeof(typestr)); > + buff= copy_event_cache_to_string_and_reinit(&tmp_cache, &bytes_in_cache); > + close_cached_file(&tmp_cache); > + > + switch (td->type(i)) // Covert string to Hex > + { > + case MYSQL_TYPE_VARCHAR: > + case MYSQL_TYPE_VAR_STRING: > + case MYSQL_TYPE_STRING: > + case MYSQL_TYPE_BLOB: > + // Avoid write_pos changed to a new area > + tmp_str.free(); I do not understand this comment or code ... the tmp_str is newly created at this point. Is it because tmp_str.free() is needed to initialise it to empty? Maybe you can clarify. > + tmp_str.append(buff + 1, bytes_in_cache - 2); // Removing quotation marks > + if (hex_str.alloc(tmp_str.length()*2+1)) // if no memory > + { > + tmp_str.free(); > + tmp_str.append(buff, bytes_in_cache); > + my_b_printf(review_sql, ", %s", tmp_str.ptr()); But what happens if no memory? Does it just silently output wrong SQL (SQL injection...)? Why doesn't it produce a proper error instead? > + break; > + } > + octet2hex((char*) hex_str.ptr(), tmp_str.ptr(), tmp_str.length()); > + my_b_printf(review_sql, ", UNHEX('%s')", hex_str.ptr()); > + break; > + default: > + tmp_str.free(); > + tmp_str.append(buff, bytes_in_cache); > + my_b_printf(review_sql, ", %s", tmp_str.ptr()); > + break; > + } > + my_free(buff); > + } > + } > + else > + { > + IO_CACHE tmp_cache; > + open_cached_file(&tmp_cache, NULL, NULL, 0, MYF(MY_WME | MY_NABP)); > + size= log_event_print_value(&tmp_cache,is_null? NULL: value, > + td->type(i), td->field_metadata(i), > + typestr, sizeof(typestr)); > + close_cached_file(&tmp_cache); > + } > + > + if (!size) > return 0; > > if (!is_null) > @@ -2637,23 +2716,91 @@ Rows_log_event::print_verbose_one_row(IO_CACHE *file, table_def *td, > > if (print_event_info->verbose > 1) > { > - my_b_write(file, (uchar*)" /* ", 4); > + if (!only_parse) > + { > + my_b_write(file, (uchar*)" /* ", 4); > > - my_b_printf(file, "%s ", typestr); > - > - my_b_printf(file, "meta=%d nullable=%d is_null=%d ", > - td->field_metadata(i), > - td->maybe_null(i), is_null); > - my_b_write(file, (uchar*)"*/", 2); > + my_b_printf(file, "%s ", typestr); > + > + my_b_printf(file, "meta=%d nullable=%d is_null=%d ", > + td->field_metadata(i), > + td->maybe_null(i), is_null); > + my_b_write(file, (uchar*)"*/", 2); > + } > } > - > - my_b_write_byte(file, '\n'); > - > + > + if (!only_parse) > + my_b_write_byte(file, '\n'); > + > null_bit_index++; > } > return value - value0; > } > > +void Rows_log_event::exchange_update_rows(PRINT_EVENT_INFO *print_event_info, > + uchar *rows_buff) Ok, so I think this function handles the problem that I mentioned earlier - that the individual rows for UPDATE need to be flashbacked in the reverse order for things to work. Please explain this in a comment describing the function - and please add test cases that tests this. I'm also wondering - isn't the same swapping needed for INSERT and DELETE, in case of self-referencing foreign keys? CREATE TABLE t1 (a INT PRIMARY KEY, b INT, FOREIGN KEY my_fk(b) REFERENCES t1(a)) ENGINE=InnoDB; BEGIN; INSERT INTO t1 VALUES (1, NULL); INSERT INTO t1 VALUES (2, 1), (3, 2), (4, 3); COMMIT; DELETE FROM t1 ORDER BY a DESC; You should add test cases for these kinds of issues as well. > +{ > + Table_map_log_event *map; > + table_def *td; > + DYNAMIC_ARRAY rows_arr; > + uchar *data_buff= rows_buff + m_rows_before_size; > + > + if (!(map= print_event_info->m_table_map.get_table(m_table_id)) || > + !(td= map->create_table_def())) > + return; > + > + (void) my_init_dynamic_array(&rows_arr, sizeof(String), 8, 8, MYF(0)); > + > + for (uchar *value= m_rows_buf; value < m_rows_end; ) > + { > + uchar *start_pos= value; > + size_t length1; > + if (!(length1= print_verbose_one_row(NULL, td, print_event_info, > + &m_cols, value, > + (const uchar*) "", TRUE))) > + return; > + value+= length1; > + > + size_t length2; > + if (!(length2= print_verbose_one_row(NULL, td, print_event_info, > + &m_cols, value, > + (const uchar*) "", TRUE))) > + return; > + value+= length2; > + > + /* Swap SET and WHERE part */ > + uchar *swap_buff1= (uchar *) my_malloc(length1, MYF(0)); > + uchar *swap_buff2= (uchar *) my_malloc(length2, MYF(0)); > + > + memcpy(swap_buff1, start_pos, length1); // SET part > + memcpy(swap_buff2, start_pos + length1, length2); // WHERE part > + > + memcpy(start_pos, swap_buff2, length2); > + memcpy(start_pos + length2, swap_buff1, length1); > + > + /* Copying one row into a buff, and pushing into the array */ > + String *one_row= new String[1]; > + one_row->append((const char *)start_pos, (uint32)(length1 + length2), &my_charset_bin); > + (void) push_dynamic(&rows_arr, (uchar *) one_row); > + > + /* Free tmp buffers */ > + my_free(swap_buff1); > + my_free(swap_buff2); > + } > + > + /* Copying rows from the end to the begining into event */ > + uchar *pos= data_buff; > + for (uint i= rows_arr.elements; i > 0; --i) > + { > + String *one_row= dynamic_element(&rows_arr, i - 1, String*); > + > + memcpy(pos, (uchar *)one_row->ptr(), one_row->length()); > + pos+= one_row->length(); > + delete one_row; > + } > + delete_dynamic(&rows_arr); > +} > + > > /** > Print a row event into IO cache in human readable form (in SQL format) > @@ -2667,8 +2814,10 @@ void Rows_log_event::print_verbose(IO_CACHE *file, > Table_map_log_event *map; > table_def *td; > const char *sql_command, *sql_clause1, *sql_clause2; > + const char *sql_command_short; > Log_event_type general_type_code= get_general_type_code(); > - > + IO_CACHE *review_sql= &print_event_info->review_sql_cache; > + > if (m_extra_row_data) > { > uint8 extra_data_len= m_extra_row_data[EXTRA_ROW_INFO_LEN_OFFSET]; > @@ -2698,19 +2847,23 @@ void Rows_log_event::print_verbose(IO_CACHE *file, > sql_command= "INSERT INTO"; > sql_clause1= "### SET\n"; > sql_clause2= NULL; > + sql_command_short= "I"; > break; > case DELETE_ROWS_EVENT: > sql_command= "DELETE FROM"; > sql_clause1= "### WHERE\n"; > sql_clause2= NULL; > + sql_command_short= "D"; > break; > case UPDATE_ROWS_EVENT: > sql_command= "UPDATE"; > sql_clause1= "### WHERE\n"; > sql_clause2= "### SET\n"; > + sql_command_short= "U"; > break; > default: > sql_command= sql_clause1= sql_clause2= NULL; > + sql_command_short= ""; > DBUG_ASSERT(0); /* Not possible */ > } > > @@ -2736,6 +2889,11 @@ void Rows_log_event::print_verbose(IO_CACHE *file, > my_b_printf(file, "### %s %`s.%`s\n", > sql_command, > map->get_db_name(), map->get_table_name()); > + > + if (need_review) > + my_b_printf(review_sql, "\nINSERT INTO `%s`.`%s` VALUES ('%s'", This is vulnerable to sql injection on the database and table names. Check the existing code, there are functions that handle quoting the names correctly. By the way, there is also the issue that depending on the SQL mode, `` or "" are the correct quoting characters to use. I seem to recall that there is an SQL mode where `` cannot be used to quote names? But I cannot seem to find it just now, so maybe I'm wrong, and `` can always be used? > + map->get_review_dbname(), map->get_review_tablename(), sql_command_short); > + > /* Print the first image */ > if (!(length= print_verbose_one_row(file, td, print_event_info, > &m_cols, value, > @@ -2752,6 +2910,15 @@ void Rows_log_event::print_verbose(IO_CACHE *file, > goto end; > value+= length; > } > + else > + { > + if (need_review) > + for (size_t i= 0; i < td->size(); i ++) > + my_b_printf(review_sql, ", NULL"); Does this generate an insert of a row with all NULLs? What is the purpose of this? If this is to handle the case where the server logged an event in not full rows mode, shouldn't this generate a sensible error to the user instead? Maybe with an option to override the error (if DBA is desparate and wants to just recover whatever can be recovered), rather than silently do a partial flashback leaving the data in unknown and inconsistent state? Same about query_log_event, what happens if those are found during flashback? Shouldn't it generate an error? > + } > + > + if (need_review) > + my_b_printf(review_sql, ")%s\n", print_event_info->delimiter); > } > > end: > @@ -2767,7 +2934,7 @@ void Log_event::print_base64(IO_CACHE* file, > PRINT_EVENT_INFO* print_event_info, > bool more) > { > - const uchar *ptr= (const uchar *)temp_buf; > + uchar *ptr= (uchar *)temp_buf; > uint32 size= uint4korr(ptr + EVENT_LEN_OFFSET); > DBUG_ENTER("Log_event::print_base64"); > > @@ -2779,6 +2946,32 @@ void Log_event::print_base64(IO_CACHE* file, > DBUG_VOID_RETURN; > } > > + if (is_flashback) > + { > + switch (ptr[EVENT_TYPE_OFFSET]) { > + case WRITE_ROWS_EVENT: > + ptr[EVENT_TYPE_OFFSET]= DELETE_ROWS_EVENT; > + break; > + case WRITE_ROWS_EVENT_V1: > + ptr[EVENT_TYPE_OFFSET]= DELETE_ROWS_EVENT_V1; > + break; > + case DELETE_ROWS_EVENT: > + ptr[EVENT_TYPE_OFFSET]= WRITE_ROWS_EVENT; > + break; > + case DELETE_ROWS_EVENT_V1: > + ptr[EVENT_TYPE_OFFSET]= WRITE_ROWS_EVENT_V1; > + break; > + case UPDATE_ROWS_EVENT: > + case UPDATE_ROWS_EVENT_V1: > + Rows_log_event *ev= NULL; > + ev= new Update_rows_log_event((const char*) ptr, size, > + glob_description_event); > + ev->exchange_update_rows(print_event_info, ptr); > + delete ev; > + break; > + } > + } > + > if (base64_encode(ptr, (size_t) size, tmp_str)) > { > DBUG_ASSERT(0); > @@ -2795,7 +2988,7 @@ void Log_event::print_base64(IO_CACHE* file, > my_b_printf(file, "'%s\n", print_event_info->delimiter); > } > > - if (print_event_info->verbose) > + if (print_event_info->verbose || need_review) > { > Rows_log_event *ev= NULL; > Log_event_type et= (Log_event_type) ptr[EVENT_TYPE_OFFSET]; > @@ -2811,6 +3004,11 @@ void Log_event::print_base64(IO_CACHE* file, > Table_map_log_event *map; > map= new Table_map_log_event((const char*) ptr, size, > glob_description_event); > + if (need_review) > + { > + map->set_review_dbname(m_review_dbname.ptr()); > + map->set_review_tablename(m_review_tablename.ptr()); > + } > print_event_info->m_table_map.set_table(map->get_table_id(), map); > break; > } > @@ -2838,14 +3036,23 @@ void Log_event::print_base64(IO_CACHE* file, > default: > break; > } > - > + > if (ev) > { > - ev->print_verbose(file, print_event_info); > + ev->need_review= need_review; > + if (print_event_info->verbose) > + ev->print_verbose(file, print_event_info); > + else > + { > + IO_CACHE tmp_cache; > + open_cached_file(&tmp_cache, NULL, NULL, 0, MYF(MY_WME | MY_NABP)); > + ev->print_verbose(&tmp_cache, print_event_info); > + close_cached_file(&tmp_cache); > + } > delete ev; > } > } > - > + > my_free(tmp_str); > DBUG_VOID_RETURN; > } > @@ -4127,7 +4334,7 @@ void Query_log_event::print_query_header(IO_CACHE* file, > > void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info) > { > - Write_on_release_cache cache(&print_event_info->head_cache, file); > + Write_on_release_cache cache(&print_event_info->head_cache, file, 0, this); > > /** > reduce the size of io cache so that the write function is called > @@ -4136,8 +4343,24 @@ void Query_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info) > DBUG_EXECUTE_IF ("simulate_file_write_error", > {(&cache)->write_pos= (&cache)->write_end- 500;}); > print_query_header(&cache, print_event_info); > - my_b_write(&cache, (uchar*) query, q_len); > - my_b_printf(&cache, "\n%s\n", print_event_info->delimiter); > + if (!is_flashback) > + { > + my_b_write(&cache, (uchar*) query, q_len); > + my_b_printf(&cache, "\n%s\n", print_event_info->delimiter); > + } > + else // is_flashback == 1 > + { > + if (strcmp("BEGIN", query) == 0) > + { > + my_b_write(&cache, (uchar*) "COMMIT", 6); > + my_b_printf(&cache, "\n%s\n", print_event_info->delimiter); > + } Hm, in MariaDB, transactions in the binlog do not start with a Query_log_event "BEGIN" event, they start with a Gtid_log_event. You probably need to handle this to output a COMMIT. > + else if (strcmp("COMMIT", query) == 0) > + { > + my_b_write(&cache, (uchar*) "BEGIN", 5); > + my_b_printf(&cache, "\n%s\n", print_event_info->delimiter); > + } > + } > } > #endif /* MYSQL_CLIENT */ > > @@ -6885,10 +7108,11 @@ Gtid_log_event::print(FILE *file, PRINT_EVENT_INFO *print_event_info) > print_event_info->server_id_printed= true; > } > > - my_b_printf(&cache, "/*!100001 SET @@session.gtid_seq_no=%s*/%s\n", > - buf, print_event_info->delimiter); > + if (!is_flashback) > + my_b_printf(&cache, "/*!100001 SET @@session.gtid_seq_no=%s*/%s\n", > + buf, print_event_info->delimiter); > } > - if (!(flags2 & FL_STANDALONE)) > + if (!(flags2 & FL_STANDALONE) && !is_flashback) > my_b_printf(&cache, "BEGIN\n%s\n", print_event_info->delimiter); > } > > @@ -7531,7 +7755,7 @@ bool Xid_log_event::write() > void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info) > { > Write_on_release_cache cache(&print_event_info->head_cache, file, > - Write_on_release_cache::FLUSH_F); > + Write_on_release_cache::FLUSH_F, this); > > if (!print_event_info->short_form) > { > @@ -7541,7 +7765,10 @@ void Xid_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info) > print_header(&cache, print_event_info, FALSE); > my_b_printf(&cache, "\tXid = %s\n", buf); > } > - my_b_printf(&cache, "COMMIT%s\n", print_event_info->delimiter); > + if (!is_flashback) > + my_b_printf(&cache, "COMMIT%s\n", print_event_info->delimiter); > + else > + my_b_printf(&cache, "BEGIN%s\n", print_event_info->delimiter); > } > #endif /* MYSQL_CLIENT */ > > @@ -8185,7 +8412,7 @@ void Unknown_log_event::print(FILE* file_arg, PRINT_EVENT_INFO* print_event_info > void Stop_log_event::print(FILE* file, PRINT_EVENT_INFO* print_event_info) > { > Write_on_release_cache cache(&print_event_info->head_cache, file, > - Write_on_release_cache::FLUSH_F); > + Write_on_release_cache::FLUSH_F, this); > > if (print_event_info->short_form) > return; > @@ -9517,6 +9744,7 @@ Rows_log_event::Rows_log_event(const char *buf, uint event_len, > m_rows_end= m_rows_buf + data_size; > m_rows_cur= m_rows_end; > memcpy(m_rows_buf, ptr_rows_data, data_size); > + m_rows_before_size= ptr_rows_data - (const uchar *) buf; // Get the size that before SET part > } > else > m_cols.bitmap= 0; // to not free it > @@ -10346,6 +10574,7 @@ void Rows_log_event::print_helper(FILE *file, > { > IO_CACHE *const head= &print_event_info->head_cache; > IO_CACHE *const body= &print_event_info->body_cache; > + IO_CACHE *const sql= &print_event_info->review_sql_cache; > if (!print_event_info->short_form) > { > bool const last_stmt_event= get_flags(STMT_END_F); > @@ -10358,8 +10587,17 @@ void Rows_log_event::print_helper(FILE *file, > > if (get_flags(STMT_END_F)) > { > - copy_event_cache_to_file_and_reinit(head, file); > - copy_event_cache_to_file_and_reinit(body, file); > + reinit_io_cache(head, READ_CACHE, 0L, FALSE, FALSE); > + output_buf.append(head, head->end_of_file); > + reinit_io_cache(head, WRITE_CACHE, 0, FALSE, TRUE); > + > + reinit_io_cache(body, READ_CACHE, 0L, FALSE, FALSE); > + output_buf.append(body, body->end_of_file); > + reinit_io_cache(body, WRITE_CACHE, 0, FALSE, TRUE); > + > + reinit_io_cache(sql, READ_CACHE, 0L, FALSE, FALSE); > + output_buf.append(sql, sql->end_of_file); > + reinit_io_cache(sql, WRITE_CACHE, 0, FALSE, TRUE); > } > } > #endif > @@ -12856,6 +13094,7 @@ st_print_event_info::st_print_event_info() > myf const flags = MYF(MY_WME | MY_NABP); > open_cached_file(&head_cache, NULL, NULL, 0, flags); > open_cached_file(&body_cache, NULL, NULL, 0, flags); > + open_cached_file(&review_sql_cache, NULL, NULL, 0, flags); > } > #endif > > diff --git a/sql/log_event.h b/sql/log_event.h > index bc850c2..c274368 100644 > --- a/sql/log_event.h > +++ b/sql/log_event.h > @@ -41,6 +41,7 @@ > #include "rpl_utility.h" > #include "hash.h" > #include "rpl_tblmap.h" > +#include "sql_string.h" > #endif > > #ifdef MYSQL_SERVER > @@ -52,7 +53,9 @@ > #include "rpl_gtid.h" > > /* Forward declarations */ > +#ifndef MYSQL_CLIENT > class String; > +#endif Ok, so the #include of sql_string.h was moved into log_event.h from mysqlbinlog.cc. Why was this necessary? Could it be avoided somehow? If not, I think at least a comment is needed here explaining why this #ifndef MYSQL_CLIENT is needed, the whole sharing of code between mysqlbinlog and server is already very confusing. > > #define PREFIX_SQL_LOAD "SQL_LOAD-" > #define LONG_FIND_ROW_THRESHOLD 60 /* seconds */ > @@ -781,9 +784,10 @@ typedef struct st_print_event_info > ~st_print_event_info() { > close_cached_file(&head_cache); > close_cached_file(&body_cache); > + close_cached_file(&review_sql_cache); > } > bool init_ok() /* tells if construction was successful */ > - { return my_b_inited(&head_cache) && my_b_inited(&body_cache); } > + { return my_b_inited(&head_cache) && my_b_inited(&body_cache) && my_b_inited(&review_sql_cache); } > > > /* Settings on how to print the events */ > @@ -811,6 +815,9 @@ typedef struct st_print_event_info > */ > IO_CACHE head_cache; > IO_CACHE body_cache; > + > + /* Storing the SQL for reviewing */ > + IO_CACHE review_sql_cache; > } PRINT_EVENT_INFO; > #endif > > @@ -1159,6 +1166,41 @@ class Log_event > void print_base64(IO_CACHE* file, PRINT_EVENT_INFO* print_event_info, > bool is_more); > #endif > + > + /* The following code used for Flashback */ > + my_bool is_flashback; > + my_bool need_review; I'm wondering if a better name would be "need_flashback_review". "review" is such a generic term... > + String output_buf; // Storing the event output > + String m_review_dbname; > + String m_review_tablename; Did you consider the performance impact of adding these extra fields to the Log_event class? I am thinking of the overhead for the server (master and slave), which creates quite a lot of events, but does not have anything to do with flashback? Did you consider alternatives, such as putting the new fields somewhere else (maybe struct st_print_event_info), or using #ifdef to add these only for mysqlbinlog, not the server? > + > + void set_review_dbname(const char *name) > + { > + if (name) > + { > + m_review_dbname.free(); > + m_review_dbname.append(name); > + } > + } > + void set_review_tablename(const char *name) > + { > + if (name) > + { > + m_review_tablename.free(); > + m_review_tablename.append(name); > + } > + } > + const char *get_review_dbname() const { return m_review_dbname.ptr(); } > + const char *get_review_tablename() const { return m_review_tablename.ptr(); } > + void free_output_buffer() > + { > + if (!output_buf.is_empty()) > + { > + output_buf.free(); > + } > + } > + /* End */ > + > /* > read_log_event() functions read an event from a binlog or relay > log; used by SHOW BINLOG EVENTS, the binlog_dump thread on the > @@ -1293,7 +1335,13 @@ class Log_event > } > Log_event(const char* buf, const Format_description_log_event > *description_event); > - virtual ~Log_event() { free_temp_buf();} > + virtual ~Log_event() > + { > + free_temp_buf(); > +#ifdef MYSQL_CLIENT > + free_output_buffer(); > +#endif > + } > void register_temp_buf(char* buf, bool must_free) > { > temp_buf= buf; > @@ -4265,12 +4313,14 @@ class Rows_log_event : public Log_event > #ifdef MYSQL_CLIENT > /* not for direct call, each derived has its own ::print() */ > virtual void print(FILE *file, PRINT_EVENT_INFO *print_event_info)= 0; > + void exchange_update_rows(PRINT_EVENT_INFO *print_event_info, uchar *rows_buff); // Exchanging the SET/WHERE part in UPDATE event > void print_verbose(IO_CACHE *file, > PRINT_EVENT_INFO *print_event_info); > size_t print_verbose_one_row(IO_CACHE *file, table_def *td, > PRINT_EVENT_INFO *print_event_info, > MY_BITMAP *cols_bitmap, > - const uchar *ptr, const uchar *prefix); > + const uchar *ptr, const uchar *prefix, > + const my_bool only_parse= 0); // if only_parse=1, then print result is unnecessary > #endif > > #ifdef MYSQL_SERVER > @@ -4407,6 +4457,8 @@ class Rows_log_event : public Log_event > uchar *m_rows_cur; /* One-after the end of the data */ > uchar *m_rows_end; /* One-after the end of the allocated space */ > > + size_t m_rows_before_size; /* The length before m_rows_buf BY P.Linux */ > + Probably don't need the "BY P.Linux" here. > flag_set m_flags; /* Flags for row-level events */ > > Log_event_type m_type; /* Actual event type */ > @@ -4889,6 +4941,23 @@ class Ignorable_log_event : public Log_event { > }; > > > +static inline char *copy_event_cache_to_string_and_reinit(IO_CACHE *cache, size_t *bytes_in_cache) > +{ > + char *buff; > + String tmp; > + > + tmp.length(0); > + reinit_io_cache(cache, READ_CACHE, 0L, FALSE, FALSE); > + tmp.append(cache, cache->end_of_file); > + reinit_io_cache(cache, WRITE_CACHE, 0, FALSE, TRUE); > + > + buff= (char *) my_malloc(tmp.length() + 1, MYF(0)); > + memcpy(buff, tmp.ptr(), tmp.length()); > + *bytes_in_cache= tmp.length(); > + > + return buff; > +} > + > static inline bool copy_event_cache_to_file_and_reinit(IO_CACHE *cache, > FILE *file) > { Hope this helps, - Kristian.

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[Maria-developers] GSoC 2016: Can anybody help me with a minor technical problem?
by Галина Шалыгина 22 May '16

22 May '16

Hi everyone, I've just posted it in my blog here <http://gsocmariadbshagalla.blogspot.ru/> : Finially I finished my project on recursive CTE, so I can resume working on my project of GSOC 2016. As I said in my previous post, I decided to start with building items clones (items are used to build different kinds of expressions in MySQL). Items are typical tree structures. If I just copy a node in the item structure, pointers to the subtrees won't be right. Fortunately this pointers can be fixed in the method Item_func_or_sum::build_clone. To copy nodes we use copy constructor. As we don't know the type of the node in general the copy constructor should be virtual. I called it get_copy. It should be implemented for each terminal class of items. There are dozens of such classes. How they could be caught? I used the following trick. My get_copy for the base class Item is 'pseudo-abstract': Item *tem::get_copy(...) { dbug_print_item(this); DBUG_ASSERT(0); return 0; } Here dbug_print_item(this) helps me to understand for which class get_copy is missed. If I call now method build_clone, for example in JOIN::optimize_inner(), to build a clone for the WHERE condition, and launch tests, it'll be easy for me to understand for which classes lack implementations of get_copy. Here I've faced some minor problem: how to skip the queries that are excuted by mtr before it starts running the tests. Anybody knows? (Now I have a workaround: call build_clone() conditinally and manually trigger the condition. Of course it's not nice.) Best wishes, Galina Shalygina.

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[Maria-developers] GSoC 2016 Community Bonding : Building Maxscale from Source
by Lisa Brinson 20 May '16

20 May '16

Hi everyone, I have created a blog on which I will bee making posts on progress in developing a filter for MS server, My first post explains how I installed MariaDB and build Maxscale from source, a challenging task. Please find the blog post HERE <https://maxscalefiltergsocproject.wordpress.com/2016/05/06/maxscale-filter-…> and feel free to provide comments. Lisa.

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Re: [Maria-developers] InnoDB blob for primary key
by Sachin Setia 19 May '16

19 May '16

Hi Sergei! As i told you i was prototyping for hash table It is done around 90% apart from one thing when hash is same how to get record from .myd file when i have offset of record so currently i am skipping it But it is very fast i do not know why this is so fast here are results of employee database salary table definition CREATE TABLE salaries ( emp_no INT NOT NULL, salary blob NOT NULL, from_date DATE NOT NULL, to_date DATE NOT NULL, FOREIGN KEY (emp_no) REFERENCES employees (emp_no) ON DELETE CASCADE, PRIMARY KEY (emp_no, from_date) ) ; And query is MariaDB [employees]> select distinct salary from salaries; Result with out using hash table +--------+ 85814 rows in set (2 min 24.76 sec) Result with using hash table | 39420 | +--------+ 85809 rows in set (6.24 sec) ( number of rows are not equal but this can be solved if i get record by offset) I am sure there is something wrong.The whole hash table is in memory like wise the b tree of hash is in memory but why there is so much improvement. Please sir check the prototype and tell if i am wrong .thanks Regards sachin On Mon, May 2, 2016 at 11:43 AM, Sergei Golubchik <serg(a)mariadb.org> wrote: > Hi, Sachin! > > On May 02, Sachin Setia wrote: > > I am sorry sir Currently my exam are going on > > But i am working on prototype of second project. Will be done by tommorow > > Regards > > sachin > > Sure thing, that's totally fine! > > Still, in the future, if you plan to go silent for a while (exam or you > just want to relax for a few days or something else :) - please drop me > a short email and then I will know that you didn't disappear from the > project. Thanks! > > Regards, > Sergei > Chief Architect MariaDB > and security(a)mariadb.org >

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Re: [Maria-developers] 1e883e9: MDEV-5535: Cannot reopen temporary table
by Sergei Golubchik 19 May '16

19 May '16

Hi, Nirbhay! Here's a review of MDEV-5535. Sorry, it took a while - this was a big patch. The approach is fine, my comments are mostly about details. On Mar 07, Nirbhay Choubey wrote: > diff --git a/mysql-test/r/temp_table.result b/mysql-test/r/temp_table.result > index ee0b3ab..94b02a6 100644 > --- a/mysql-test/r/temp_table.result > +++ b/mysql-test/r/temp_table.result > @@ -308,3 +308,185 @@ show status like 'com_drop%table'; > Variable_name Value > Com_drop_table 2 > Com_drop_temporary_table 1 > +# > +# MDEV-5535: Cannot reopen temporary table > +# > +DROP DATABASE IF EXISTS temp_db; > +CREATE DATABASE temp_db; > +USE temp_db; > +# > +# SHOW TABLES do not list temporary tables. > +# > +CREATE TEMPORARY TABLE temp_t1(i INT) ENGINE=INNODB; > +INSERT INTO temp_t1 VALUES(1); > +SELECT * FROM temp_t1; > +i > +1 > +SHOW TABLES; > +Tables_in_temp_db > +DROP TABLE temp_t1; > +# > +# Create and drop a temporary table. > +# > +CREATE TEMPORARY TABLE temp_t1(i INT) ENGINE=INNODB; > +INSERT INTO temp_t1 VALUES(1); > +SELECT * FROM temp_t1; > +i > +1 > +DROP TABLE temp_t1; > +SELECT * FROM temp_t1; > +ERROR 42S02: Table 'temp_db.temp_t1' doesn't exist > +# > +# Create a tempporary table and base table with same name and DROP TABLE. > +# > +CREATE TABLE t1(c1 VARCHAR(20)) ENGINE=INNODB; > +INSERT INTO t1 VALUES("BASE TABLE"); > +CREATE TEMPORARY TABLE t1(c1 VARCHAR(20)) ENGINE=INNODB; > +INSERT INTO t1 VALUES("TEMPORARY TABLE"); > +SELECT * FROM t1; > +c1 > +TEMPORARY TABLE > +DROP TABLE t1; > +SELECT * FROM t1; > +c1 > +BASE TABLE > +DROP TABLE t1; > +SELECT * FROM t1; > +ERROR 42S02: Table 'temp_db.t1' doesn't exist > +# > +# Create a tempporary table and base table with same name and DROP TEMPORARY > +# TABLE. > +# > +CREATE TABLE t1(c1 VARCHAR(20)) ENGINE=INNODB; > +INSERT INTO t1 VALUES("BASE TABLE"); > +CREATE TEMPORARY TABLE t1(c1 VARCHAR(20)) ENGINE=INNODB; > +INSERT INTO t1 VALUES("TEMPORARY TABLE"); > +SELECT * FROM t1; > +c1 > +TEMPORARY TABLE > +DROP TEMPORARY TABLE t1; > +SELECT * FROM t1; > +c1 > +BASE TABLE > +DROP TEMPORARY TABLE t1; > +ERROR 42S02: Unknown table 'temp_db.t1' > +SELECT * FROM t1; > +c1 > +BASE TABLE > +DROP TABLE t1; > +# > +# Create a temporary table and drop its parent database. > +# > +USE temp_db; > +CREATE TEMPORARY TABLE temp_t1(i INT) ENGINE=INNODB; > +INSERT INTO temp_t1 VALUES (1); > +DROP DATABASE temp_db; > +CREATE DATABASE temp_db; > +USE temp_db; > +DROP TEMPORARY TABLE temp_t1; > +# > +# Similar to above, but this time with a base table with same name. > +# > +USE temp_db; > +CREATE TABLE t1(i INT)ENGINE=INNODB; > +CREATE TEMPORARY TABLE t1(i INT) ENGINE=INNODB; > +INSERT INTO t1 VALUES (1); > +DROP DATABASE temp_db; > +CREATE DATABASE temp_db; > +USE temp_db; > +DROP TEMPORARY TABLE t1; > +DROP TABLE t1; > +ERROR 42S02: Unknown table 'temp_db.t1' > +# > +# Create a temporary table within a function. > +# > +USE temp_db; > +CREATE FUNCTION f1() RETURNS INT > +BEGIN > +DROP TEMPORARY TABLE IF EXISTS temp_t1; > +CREATE TEMPORARY TABLE temp_t1(i INT) ENGINE=INNODB; > +INSERT INTO `temp_t1` VALUES(1); > +RETURN (SELECT COUNT(*) FROM temp_t1); > +END| > +SELECT f1(); > +f1() > +1 > +SELECT * FROM temp_t1; > +i > +1 > +DROP TABLE temp_t1; > +CREATE TEMPORARY TABLE `temp_t1`(i INT) ENGINE=INNODB; > +SELECT f1(); > +f1() > +1 > +SELECT * FROM temp_t1; > +i > +1 > +DROP FUNCTION f1; > +# > +# Create and drop a temporary table within a function. > +# > +CREATE FUNCTION f2() RETURNS INT > +BEGIN > +DROP TEMPORARY TABLE IF EXISTS temp_t1; > +CREATE TEMPORARY TABLE temp_t1(i INT) ENGINE=INNODB; > +INSERT INTO temp_t1 VALUES(1); > +DROP TABLE temp_t1; > +RETURN 0; > +END| > +ERROR HY000: Explicit or implicit commit is not allowed in stored function or trigger. > +# > +# Create a temporary table within a function and select it from another > +# function. > +# > +CREATE FUNCTION f2() RETURNS INT > +BEGIN > +DROP TEMPORARY TABLE IF EXISTS temp_t1; > +CREATE TEMPORARY TABLE temp_t1 (i INT) ENGINE=INNODB; > +INSERT INTO temp_t1 VALUES (1); > +RETURN f2_1(); > +END| > +CREATE FUNCTION f2_1() RETURNS INT > +RETURN (SELECT COUNT(*) FROM temp_t1)| > +DROP TEMPORARY TABLE temp_t1; > +SELECT f2(); > +f2() > +1 > +DROP TEMPORARY TABLE temp_t1; > +DROP FUNCTION f2; > +# > +# Create temporary table like base table. > +# > +CREATE TABLE t1(i INT) ENGINE=INNODB; > +INSERT INTO t1 VALUES(1); > +CREATE TEMPORARY TABLE temp_t1 LIKE t1; > +SELECT * FROM temp_t1; > +i > +CREATE TEMPORARY TABLE t1 LIKE t1; > +ERROR 42000: Not unique table/alias: 't1' > +DROP TABLE temp_t1, t1; > +# > +# Create temporary table as base table. > +# > +CREATE TABLE t1(i INT) ENGINE=INNODB; > +INSERT INTO t1 VALUES(1); > +CREATE TEMPORARY TABLE temp_t1 AS SELECT * FROM t1; > +SELECT * FROM temp_t1; > +i > +1 > +DROP TABLE temp_t1, t1; > +# > +# Reopen temporary table > +# > +CREATE TEMPORARY TABLE temp_t1(i int)ENGINE=INNODB; > +INSERT INTO temp_t1 VALUES(1), (2); > +SELECT * FROM temp_t1 a, temp_t1 b; > +i i > +1 1 > +1 2 > +2 1 > +2 2 > +DROP TABLE temp_t1; > +# Cleanup > +DROP DATABASE temp_db; > +# MDEV-5535: End of tests What's that? You have lots of tests for temporary tables - not that I mind the number, but they are mostly unrelated to MDEV-5535. Only the one last test is about the new feature. I'd expect it to be the other way around - many tests for the new functionality and few, if at all - for the unmodified behavior. > diff --git a/mysql-test/r/temp_table_frm.result b/mysql-test/r/temp_table_frm.result > index 19c6638..58e9a0a 100644 > --- a/mysql-test/r/temp_table_frm.result > +++ b/mysql-test/r/temp_table_frm.result > @@ -16,6 +16,6 @@ variable_name session_status.variable_value - t1.variable_value > OPENED_FILES 0 > OPENED_PLUGIN_LIBRARIES 0 > OPENED_TABLE_DEFINITIONS 2 > -OPENED_TABLES 1 > +OPENED_TABLES 2 why did it change? UPDATE: now, I see - you close and open temporary tables all the time. See my comment about it below. > OPENED_VIEWS 0 > drop table t1; > diff --git a/mysql-test/suite/handler/handler.inc b/mysql-test/suite/handler/handler.inc > index c71dc53..ca67b62 100644 > --- a/mysql-test/suite/handler/handler.inc > +++ b/mysql-test/suite/handler/handler.inc > @@ -489,7 +489,7 @@ handler t1 open as a1; > handler a1 read a=(1); > handler a1 read a next; > handler a1 read a next; > ---error ER_CANT_REOPEN_TABLE > +#--error ER_CANT_REOPEN_TABLE remove it, don't comment. And, please, fix the comment before this test. > select a,b from t1; > handler a1 read a prev; > handler a1 read a prev; > diff --git a/mysql-test/suite/multi_source/status_vars.result b/mysql-test/suite/multi_source/status_vars.result > index 12917f9..50d500e 100644 > --- a/mysql-test/suite/multi_source/status_vars.result > +++ b/mysql-test/suite/multi_source/status_vars.result > @@ -76,22 +76,34 @@ start slave; > include/wait_for_slave_to_start.inc > set binlog_format = statement; > create temporary table tmp1 (i int) engine=MyISAM; > +show status like 'Slave_open_temp_table_definitions'; > +Variable_name Value > +Slave_open_temp_table_definitions 1 > show status like 'Slave_open_temp_tables'; > Variable_name Value > -Slave_open_temp_tables 1 > +Slave_open_temp_tables 0 why did it change? > set default_master_connection = 'master1'; > +show status like 'Slave_open_temp_table_definitions'; > +Variable_name Value > +Slave_open_temp_table_definitions 1 > show status like 'Slave_open_temp_tables'; > Variable_name Value > -Slave_open_temp_tables 1 > +Slave_open_temp_tables 0 > set binlog_format = statement; > create temporary table tmp1 (i int) engine=MyISAM; > +show status like 'Slave_open_temp_table_definitions'; > +Variable_name Value > +Slave_open_temp_table_definitions 2 > show status like 'Slave_open_temp_tables'; > Variable_name Value > -Slave_open_temp_tables 2 > +Slave_open_temp_tables 0 > set default_master_connection = ''; > +show status like 'Slave_open_temp_table_definitions'; > +Variable_name Value > +Slave_open_temp_table_definitions 2 > show status like 'Slave_open_temp_tables'; > Variable_name Value > -Slave_open_temp_tables 2 > +Slave_open_temp_tables 0 > include/reset_master_slave.inc > include/reset_master_slave.inc > include/reset_master_slave.inc > diff --git a/mysql-test/suite/multi_source/status_vars.test b/mysql-test/suite/multi_source/status_vars.test > index d1cfda7..f9d2e85 100644 > --- a/mysql-test/suite/multi_source/status_vars.test > +++ b/mysql-test/suite/multi_source/status_vars.test > @@ -107,9 +107,11 @@ create temporary table tmp1 (i int) engine=MyISAM; > > --connection slave > --sync_with_master 0,'master1' > +show status like 'Slave_open_temp_table_definitions'; > show status like 'Slave_open_temp_tables'; You can do show status like 'Slave_open_temp_table%'; instead. here and everywhere. > > set default_master_connection = 'master1'; > +show status like 'Slave_open_temp_table_definitions'; > show status like 'Slave_open_temp_tables'; > > --connect (master2,127.0.0.1,root,,,$SERVER_MYPORT_2) > diff --git a/sql/rpl_rli.cc b/sql/rpl_rli.cc > index 7bdd9c1..426989c 100644 > --- a/sql/rpl_rli.cc > +++ b/sql/rpl_rli.cc > @@ -1060,24 +1061,14 @@ void Relay_log_info::inc_group_relay_log_pos(ulonglong log_pos, > > void Relay_log_info::close_temporary_tables() > { > - TABLE *table,*next; > DBUG_ENTER("Relay_log_info::close_temporary_tables"); > > - for (table=save_temporary_tables ; table ; table=next) > + if (sql_driver_thd) > { > - next=table->next; > - > - /* Reset in_use as the table may have been created by another thd */ > - table->in_use=0; > - /* > - Don't ask for disk deletion. For now, anyway they will be deleted when > - slave restarts, but it is a better intention to not delete them. > - */ > - DBUG_PRINT("info", ("table: 0x%lx", (long) table)); > - close_temporary(table, 1, 0); > + sql_driver_thd->temporary_tables.close_tables(true); Hmm, really? see that comment above in the old code: /* Reset in_use as the table may have been created by another thd */ and now you assume that all temptables belong to sql_driver_thd? but sql_driver_thd comment says THD for the main sql thread, the one that starts threads to process slave requests. If there is only one thread, then this THD is also used for SQL processing. and indeed in parallel replication there can be many sql threads, all with their own temporary tables. > } > - save_temporary_tables= 0; > - slave_open_temp_tables= 0; > + save_temp_table_shares= 0; > + > DBUG_VOID_RETURN; > } > > @@ -1753,6 +1744,10 @@ void rpl_group_info::cleanup_context(THD *thd, bool error) > } > m_table_map.clear_tables(); > slave_close_thread_tables(thd); > + > + /* Cleanup temporary tables. */ > + thd->temporary_tables.cleanup(); > + why this was not needed before? > if (error) > { > thd->mdl_context.release_transactional_locks(); > diff --git a/sql/sp_head.cc b/sql/sp_head.cc > index cf0b8e8..45346cd 100644 > --- a/sql/sp_head.cc > +++ b/sql/sp_head.cc > @@ -2929,6 +2929,7 @@ void sp_head::add_mark_lead(uint ip, List<sp_instr> *leads) > thd->get_stmt_da()->set_overwrite_status(false); > } > thd_proc_info(thd, "closing tables"); > + /* main.temp_table: check this */ what does that mean? > close_thread_tables(thd); > thd_proc_info(thd, 0); > > @@ -2970,8 +2971,7 @@ void sp_head::add_mark_lead(uint ip, List<sp_instr> *leads) > open_tables stage. > */ > if (!res || !thd->is_error() || > - (thd->get_stmt_da()->sql_errno() != ER_CANT_REOPEN_TABLE && can ER_CANT_REOPEN_TABLE still happen somewhere? > - thd->get_stmt_da()->sql_errno() != ER_NO_SUCH_TABLE && > + (thd->get_stmt_da()->sql_errno() != ER_NO_SUCH_TABLE && > thd->get_stmt_da()->sql_errno() != ER_NO_SUCH_TABLE_IN_ENGINE && > thd->get_stmt_da()->sql_errno() != ER_UPDATE_TABLE_USED)) > thd->stmt_arena->state= Query_arena::STMT_EXECUTED; > diff --git a/sql/sql_class.cc b/sql/sql_class.cc > index 6656a84..e73ada2 100644 > --- a/sql/sql_class.cc > +++ b/sql/sql_class.cc > @@ -4230,7 +4234,8 @@ void THD::restore_backup_open_tables_state(Open_tables_backup *backup) > Before we will throw away current open tables state we want > to be sure that it was properly cleaned up. > */ > - DBUG_ASSERT(open_tables == 0 && temporary_tables == 0 && > + DBUG_ASSERT(open_tables == 0 && > + temporary_tables.is_empty() && temporary_tables.is_empty() is not the same as temporary_tables == 0, because it takes into account thd->rgi_slave > derived_tables == 0 && > lock == 0 && > locked_tables_mode == LTM_NONE && > diff --git a/sql/sql_class.h b/sql/sql_class.h > index ae240ae..02b5739 100644 > --- a/sql/sql_class.h > +++ b/sql/sql_class.h > @@ -799,6 +800,13 @@ enum killed_type > volatile int64 local_memory_used; > /* Memory allocated for global usage */ > volatile int64 global_memory_used; > + > + /* Open temporary tables. */ > + ulong open_temporary_tables; this one doesn't seem to be used anywhere > + /* Number of temporary table definitions opened by THD. */ > + ulong opened_temporary_table_definitions; > + /* Number of temporary tables opened by THD. */ > + ulong opened_temporary_tables; > } STATUS_VAR; > > /* > @@ -3506,13 +3525,13 @@ class THD :public Statement, > */ > DBUG_PRINT("debug", > ("temporary_tables: %s, in_sub_stmt: %s, system_thread: %s", > - YESNO(temporary_tables), YESNO(in_sub_stmt), > + YESNO(temporary_tables.is_empty()), YESNO(in_sub_stmt), > show_system_thread(system_thread))); > if (in_sub_stmt == 0) > { > if (wsrep_binlog_format() == BINLOG_FORMAT_ROW) > set_current_stmt_binlog_format_row(); > - else if (temporary_tables == NULL) > + else if (temporary_tables.is_empty()) temporary_tables.is_empty() is not the same as temporary_tables == NULL > set_current_stmt_binlog_format_stmt(); > } > DBUG_VOID_RETURN; > diff --git a/sql/sql_handler.cc b/sql/sql_handler.cc > index e8ade81..52b14e1 100644 > --- a/sql/sql_handler.cc > +++ b/sql/sql_handler.cc > @@ -180,7 +180,7 @@ static void mysql_ha_close_table(SQL_HANDLER *handler) > table->file->ha_index_or_rnd_end(); > table->query_id= thd->query_id; > table->open_by_handler= 0; > - mark_tmp_table_for_reuse(table); > + //mark_tmp_table_for_reuse(table); why? > } > my_free(handler->lock); > handler->init(); > diff --git a/sql/sql_insert.cc b/sql/sql_insert.cc > index aa2cae5..c594ef1 100644 > --- a/sql/sql_insert.cc > +++ b/sql/sql_insert.cc > @@ -4051,16 +4051,16 @@ static TABLE *create_table_from_items(THD *thd, > } > else > { > - if (open_temporary_table(thd, create_table)) > - { > - /* > - This shouldn't happen as creation of temporary table should make > - it preparable for open. Anyway we can't drop temporary table if > - we are unable to find it. > - */ > - DBUG_ASSERT(0); > - } > - DBUG_ASSERT(create_table->table == create_info->table); > + /* > + TODO: Explain why we do not need to call THD::wait_for_prior_commit() > + here? > + */ So? > + TABLE *tab= create_info->table; > + tab->query_id= thd->query_id; > + thd->thread_specific_used= true; > + create_table->updatable= true; > + create_table->table= tab; > + tab->init(thd, create_table); hmm, you don't create a table here. how comes? > } > } > else > diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc > index 52dcc7e..64227d4 100644 > --- a/sql/sql_parse.cc > +++ b/sql/sql_parse.cc > @@ -23,7 +23,7 @@ > // set_handler_table_locks, > // lock_global_read_lock, > // make_global_read_lock_block_commit > -#include "sql_base.h" // find_temporary_table > +#include "sql_base.h" // Temporary_tables::find_table really? it's in temporary_tables.h, not in sql_base.h anymore > #include "sql_cache.h" // QUERY_CACHE_FLAGS_SIZE, query_cache_* > #include "sql_show.h" // mysqld_list_*, mysqld_show_*, > // calc_sum_of_all_status > @@ -5730,6 +5731,8 @@ static bool do_execute_sp(THD *thd, sp_head *sp) > > /* Free tables */ > close_thread_tables(thd); > + /* Do not close HANDLER tables. */ > + thd->temporary_tables.close_tables(false); why this wasn't here before? > #ifdef WITH_WSREP > thd->wsrep_consistency_check= NO_CONSISTENCY_CHECK; > #endif /* WITH_WSREP */ > diff --git a/sql/sql_table.cc b/sql/sql_table.cc > index 40032c3..f568432 100644 > --- a/sql/sql_table.cc > +++ b/sql/sql_table.cc > @@ -4608,13 +4602,14 @@ handler *mysql_create_frm_image(THD *thd, > which was created. > @param[out] key_count Number of keys in table which was created. > > - If one creates a temporary table, this is automatically opened > - > Note that this function assumes that caller already have taken > exclusive metadata lock on table being created or used some other > way to ensure that concurrent operations won't intervene. > mysql_create_table() is a wrapper that can be used for this. > > + In case of temporary tables, the TABLE_SHARE is added to thd's > + temporary_tables_share list. > + hmm, so you've decided not to open the table automatically... > @retval 0 OK > @retval 1 error > @retval -1 table existed but IF EXISTS was used > @@ -4820,17 +4813,12 @@ int create_table_impl(THD *thd, > create_info->table= 0; > if (!frm_only && create_info->tmp_table()) > { > - /* > - Open a table (skipping table cache) and add it into > - THD::temporary_tables list. > - */ > - > - TABLE *table= open_table_uncached(thd, create_info->db_type, frm, path, > - db, table_name, true, true); > + TABLE *table= > + thd->temporary_tables.create_and_use_table(create_info->db_type, frm, > + path, db, table_name, true); > > if (!table) > { > - (void) rm_temporary_table(create_info->db_type, path); why not? because create_and_use_table() is atomic? > goto err; > } > > diff --git a/sql/table.h b/sql/table.h > index ab39603..8b7c665 100644 > --- a/sql/table.h > +++ b/sql/table.h > @@ -600,6 +601,7 @@ struct TABLE_STATISTICS_CB > struct TABLE_SHARE > { > TABLE_SHARE() {} /* Remove gcc warning */ > + TABLE_SHARE *next, *prev; I'd rather not add two pointers to TABLE_SHARE just for the sake of temporary tables. Use something else, please. May be List<> will work for you? Or, like struct TMP_TABLE_SHARE: TABLE_SHARE { TMP_TABLE_SHARE *next, *prev; } > > /** Category of this table. */ > TABLE_CATEGORY table_category; > diff --git a/sql/table_cache.cc b/sql/table_cache.cc > index 2dd368a..b307841 100644 > --- a/sql/table_cache.cc > +++ b/sql/table_cache.cc > @@ -589,6 +589,7 @@ void tdc_unlock_share(TDC_element *element) > key Table cache key > key_length Length of key > flags operation: what to open table or view > + out_table TABLE for the requested table please, put unrelated comment fixes in a separate commit (it's very easy to do with git citool) > > IMPLEMENTATION > Get a table definition from the table definition cache. > diff --git a/sql/table_cache.h b/sql/table_cache.h > index 2c5b0fc..ac36269 100644 > --- a/sql/table_cache.h > +++ b/sql/table_cache.h > @@ -1,3 +1,5 @@ > +#ifndef TABLE_CACHE_H_INCLUDED > +#define TABLE_CACHE_H_INCLUDED and this one too. commit all unrelated changes separately > /* Copyright (c) 2000, 2012, Oracle and/or its affiliates. > Copyright (c) 2010, 2011 Monty Program Ab > Copyright (C) 2013 Sergey Vojtovich and MariaDB Foundation > diff --git a/storage/myisam/mi_close.c b/storage/myisam/mi_close.c > index f0a82bc..23e01ef 100644 > --- a/storage/myisam/mi_close.c > +++ b/storage/myisam/mi_close.c > @@ -67,7 +67,7 @@ int mi_close(register MI_INFO *info) > if (share->kfile >= 0 && > flush_key_blocks(share->key_cache, share->kfile, > &share->dirty_part_map, > - ((share->temporary || share->deleting) ? > + ((share->deleting) ? Why? in all your myisam/aria changes (this one and others) you've enabled updating of on-disk data for temporary tables. like, flush keycache blocks, update file header, etc. Why should it be done persistently on disk? Temporary tables are not persistent, if mariadb crashes nobody will care what old temporary table files will contain. It should be enough to have all up-to-date information in memory. > FLUSH_IGNORE_CHANGED : > FLUSH_RELEASE))) > error=my_errno; > diff --git a/sql/temporary_tables.h b/sql/temporary_tables.h > new file mode 100644 > index 0000000..c345bea > --- /dev/null > +++ b/sql/temporary_tables.h > @@ -0,0 +1,112 @@ > +#ifndef TEMPORARY_TABLES_H > +#define TEMPORARY_TABLES_H > +/* > + Copyright (c) 2016 MariaDB Corporation > + > + This program is free software; you can redistribute it and/or modify > + it under the terms of the GNU General Public License as published by > + the Free Software Foundation; version 2 of the License. > + > + This program is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + GNU General Public License for more details. > + > + You should have received a copy of the GNU General Public License > + along with this program; if not, write to the Free Software > + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA > +*/ > + > +#define TMP_TABLE_KEY_EXTRA 8 > + > +class Temporary_tables { > +public: > + Temporary_tables() : m_thd(0), m_table_shares(0), m_opened_tables(0) {} > + bool init(THD *thd); > + bool is_empty(); > + bool reset(); > + bool cleanup(); > + TABLE_SHARE *create_table(handlerton *hton, LEX_CUSTRING *frm, > + const char *path, const char *db, > + const char *table_name); > + TABLE_SHARE *find_table(const TABLE_LIST *tl); > + TABLE_SHARE *find_table_reduced_key_length(const char *key, uint key_length); > + TABLE_SHARE *find_table(const char *db, const char *table_name); > + TABLE *find_open_table(const char *db, const char *table_name); > + TABLE *create_and_use_table(handlerton *hton, LEX_CUSTRING *frm, > + const char *path, const char *db, > + const char *table_name, bool open_in_engine); > + TABLE *open_table(TABLE_SHARE *share, const char *alias, bool open_in_engine); > + bool open_table(TABLE_LIST *tl); > + bool open_tables(TABLE_LIST *tl); > + bool close_tables(bool all); > + bool rename_table(TABLE *table, const char *db, const char *table_name); > + bool drop_table(TABLE *table, bool *is_trans, bool delete_in_engine); > + void mark_tables_as_free_for_reuse(); > + > +private: > + uint create_table_def_key(char *key, > + const char *db, > + const char *table_name); > + TABLE_SHARE *find_table(const char *key, uint key_length); > + TABLE *find_open_table(const char *key, uint key_length); > + TABLE *open_table(const char *db, const char *table_name); > + bool close_table(TABLE *table); > + bool rm_temporary_table(handlerton *hton, const char *path); > + bool wait_for_prior_commit(); > + bool write_query_log_events(); > + void lock_tables(); > + void unlock_tables(); > + > + /* > + Return true if the table was created explicitly. > + */ > + bool is_user_table(TABLE_SHARE *share) > + { > + const char *name= share->table_name.str; > + return strncmp(name, tmp_file_prefix, tmp_file_prefix_length); > + } Is that right? I can do CREATE TEMPORARY TABLE `#sql-foo` (a int). the correct test needs to look at, for example, table->s->path or some flag, may be... Why wouldn't it use share->tmp_table? > + > + /* List operations */ > + template <class T> > + void link(T **list, T *element) > + { > + element->next= *list; > + if (element->next) > + element->next->prev= element; > + *list= element; > + (*list)->prev= 0; > + } > + > + template <class T> > + void unlink(T **list, T *element) > + { > + if (element->prev) > + { > + element->prev->next= element->next; > + if (element->prev->next) > + element->next->prev= element->prev; > + } > + else > + { > + DBUG_ASSERT(element == *list); > + > + *list= element->next; > + if (*list) > + element->next->prev= 0; > + } > + } > + > + uint tmpkeyval(TABLE_SHARE *share) > + { > + return uint4korr(share->table_cache_key.str + > + share->table_cache_key.length - 4); > + } > + > +private: > + THD *m_thd; Hmm, is that necessary? Temporary_tables class is instantiated in only one place - inside the THD. So Temporary_tables always belongs to its thd, and storing a point to the parent THD in the Temporary_tables you basically add another void* to already big THD class, while thid pointer stores no useful information at all. A hackish way to fix is is to replace m_thd with (((char*)this) - offsetof(THD, temporary_tables)) I'm not suggesting this hack, it is just to prove that m_thd is redundant. I hope you'll find a nicer and safer solution :) By the way, any increase in the THD size will most probably cause a test failure on labrador, you'll need to increase the DEFAULT_THREAD_STACK to fix it. Please check that - even if you remove m_thd there is still a m_table_shares pointer that increases THD size. > + TABLE_SHARE *m_table_shares; > + TABLE *m_opened_tables; > +}; > + > +#endif /* TEMPORARY_TABLES_H */ > diff --git a/sql/temporary_tables.cc b/sql/temporary_tables.cc > new file mode 100644 > index 0000000..5d8bce6 > --- /dev/null > +++ b/sql/temporary_tables.cc > @@ -0,0 +1,1265 @@ > +/* > + Copyright (c) 2016 MariaDB Corporation > + > + This program is free software; you can redistribute it and/or modify > + it under the terms of the GNU General Public License as published by > + the Free Software Foundation; version 2 of the License. > + > + This program is distributed in the hope that it will be useful, > + but WITHOUT ANY WARRANTY; without even the implied warranty of > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + GNU General Public License for more details. > + > + You should have received a copy of the GNU General Public License > + along with this program; if not, write to the Free Software > + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA > +*/ > + > +#include "sql_acl.h" /* TMP_TABLE_ACLS */ > +#include "sql_base.h" /* free_io_cache, > + get_table_def_key, > + tdc_create_key */ > +#include "lock.h" /* mysql_lock_remove */ > +#include "log_event.h" /* Query_log_event */ > +#include "sql_show.h" /* append_identifier */ > +#include "sql_handler.h" /* mysql_ha_rm_temporary_tables */ > +#include "temporary_tables.h" /* Temporary_tables */ > +#include "rpl_rli.h" /* rpl_group_info */ > + > + > +/* > + Initialize the Temporary_tables object. Currently it always returns > + false (success). > + > + @param thd [IN] Thread handle > + > + @return false Success > + true Error > +*/ > +bool Temporary_tables::init(THD *thd) > +{ > + DBUG_ENTER("Temporary_tables::init"); > + this->m_thd= thd; > + DBUG_RETURN(false); > +} > + > + > +/* > + Check whether temporary tables exist. The decision is made based on the > + existence of TABLE_SHAREs. > + > + @return false Temporary tables exist > + true No temporary table exist > +*/ > +bool Temporary_tables::is_empty() > +{ > + bool result; > + > + if (!m_thd) > + { > + return true; > + } > + > + rpl_group_info *rgi_slave= m_thd->rgi_slave; > + > + if (rgi_slave) > + { > + result= (rgi_slave->rli->save_temp_table_shares == NULL) ? true : false; > + } > + else > + { > + result= (m_table_shares == NULL) ? true : false; > + } > + > + return result; > +} > + > + > +/* > + Reset the Temporary_tables object. Currently, it always returns > + false (success). > + > + @return false Success > + true Error > +*/ > +bool Temporary_tables::reset() > +{ > + DBUG_ENTER("Temporary_tables::reset"); > + m_table_shares= 0; > + m_opened_tables= 0; > + DBUG_RETURN(false); > +} > + > + > +/* > + Cleanup the session's temporary tables by closing all open temporary tables > + as well as freeing the respective TABLE_SHAREs. > + It also writes "DROP TEMPORARY TABLE .." query log events to the binary log. > + > + Currently, it always returns false (success). > + > + @return false Success > + true Error > +*/ > +bool Temporary_tables::cleanup() > +{ > + DBUG_ENTER("Temporary_tables::cleanup"); > + > + TABLE_SHARE *share; > + TABLE_SHARE *next; > + lock_tables(); old code used to have here: if (!thd->temporary_tables) DBUG_RETURN(FALSE); DBUG_ASSERT(!thd->rgi_slave); you don't do either, instead you do lock_tables() (which is only needed if thd->rgi_slave != NULL). How comes? > + > + /* > + Ensure we don't have open HANDLERs for tables we are about to close. > + This is necessary when close_temporary_tables() is called as part s/close_temporary_tables/Temporary_tables::cleanup/ in the comment > + of execution of BINLOG statement (e.g. for format description event). > + */ > + mysql_ha_rm_temporary_tables(m_thd); > + > + // Close all open temporary tables. > + close_tables(true); > + > + // Write DROP TEMPORARY TABLE query log events to binary log. > + if (!m_thd->rgi_slave) another if (!m_thd->rgi_slave) while the old code had DBUG_ASSERT instead > + { > + write_query_log_events(); > + } > + > + // Free all TABLE_SHARES. > + share= m_table_shares; > + > + while (share) { > + next= share->next; > + rm_temporary_table(share->db_type(), share->path.str); > + > + /* Delete the share from table share list */ > + unlink<TABLE_SHARE>(&m_table_shares, share); > + > + free_table_share(share); > + my_free(share); > + > + /* Decrement Slave_open_temp_table_definitions status variable count. */ > + if (m_thd->rgi_slave) > + { > + thread_safe_decrement32(&slave_open_temp_table_definitions); > + } why did you put write_query_log_events() in a separate function? now you need to iterate the list of tables twice. > + > + share= next; > + } > + > + reset(); > + > + unlock_tables(); > + > + DBUG_RETURN(false); > +} > + > + > +/* > + Create a temporary table. > + > + @param hton [in] Handlerton > + @param frm [in] Binary frm image > + @param path [in] File path (without extension) > + @param db [in] Schema name > + @param table_name [in] Table name > + > + @return Success A pointer to table share object > + Failure NULL > +*/ > +TABLE_SHARE *Temporary_tables::create_table(handlerton *hton, LEX_CUSTRING *frm, > + const char *path, const char *db, > + const char *table_name) > +{ > + DBUG_ENTER("Temporary_tables::create_table"); > + > + TABLE_SHARE *share= NULL; > + char key_cache[MAX_DBKEY_LENGTH], *saved_key_cache, *tmp_path; > + uint key_length; > + int res; > + > + lock_tables(); > + > + if (wait_for_prior_commit()) > + { > + goto end; /* Failure */ > + } > + > + /* Create the table definition key for the temporary table. */ > + key_length= create_table_def_key(key_cache, db, table_name); > + > + if (!(share= (TABLE_SHARE *) my_malloc(sizeof(TABLE_SHARE) + strlen(path) + > + 1 + key_length, MYF(MY_WME)))) > + { > + goto end; /* Out of memory */ > + } > + > + tmp_path= (char *)(share + 1); > + saved_key_cache= strmov(tmp_path, path) + 1; > + memcpy(saved_key_cache, key_cache, key_length); > + > + init_tmp_table_share(m_thd, share, saved_key_cache, key_length, > + strend(saved_key_cache) + 1, tmp_path); > + > + share->db_plugin= ha_lock_engine(m_thd, hton); > + > + /* > + Prefer using frm image over file. The image might not be available in > + ALTER TABLE, when the discovering engine took over the ownership (see > + TABLE::read_frm_image). > + */ > + res= (frm->str) > + ? share->init_from_binary_frm_image(m_thd, false, frm->str, frm->length) > + : open_table_def(m_thd, share, GTS_TABLE | GTS_USE_DISCOVERY); > + > + if (res) > + { > + /* > + No need to lock share->mutex as this is not needed for temporary tables. > + */ > + free_table_share(share); > + my_free(share); > + share= NULL; > + goto end; > + } > + > + share->m_psi= PSI_CALL_get_table_share(true, share); > + > + /* Add share to the head of table share list. */ > + link<TABLE_SHARE>(&m_table_shares, share); > + > + /* Increment Slave_open_temp_table_definitions status variable count. */ > + if (m_thd->rgi_slave) > + { > + thread_safe_increment32(&slave_open_temp_table_definitions); > + } > + > +end: > + unlock_tables(); > + > + DBUG_RETURN(share); > +} > + > + > +/* > + Lookup the TABLE_SHARE using the given db/table_name.The server_id and > + pseudo_thread_id used to generate table definition key is taken from > + m_thd (see create_table_def_key()). Return NULL is none found. > + > + @return Success A pointer to table share object > + Failure NULL > +*/ > +TABLE_SHARE *Temporary_tables::find_table(const char *db, > + const char *table_name) > +{ > + DBUG_ENTER("Temporary_tables::find_table"); > + > + TABLE_SHARE *share; > + char key[MAX_DBKEY_LENGTH]; > + uint key_length; > + > + key_length= create_table_def_key(key, db, table_name); > + share= find_table(key, key_length); > + > + DBUG_RETURN(share); > +} > + > + > +/* > + Lookup TABLE_SHARE using the specified TABLE_LIST element. Return NULL is none > + found. > + > + @return Success A pointer to table share object > + Failure NULL > +*/ > +TABLE_SHARE *Temporary_tables::find_table(const TABLE_LIST *tl) > +{ > + DBUG_ENTER("Temporary_tables::find_table"); > + > + TABLE_SHARE *share; > + const char *tmp_key; > + char key[MAX_DBKEY_LENGTH]; > + uint key_length; > + > + key_length= get_table_def_key(tl, &tmp_key); > + memcpy(key, tmp_key, key_length); > + int4store(key + key_length, m_thd->variables.server_id); > + int4store(key + key_length + 4, m_thd->variables.pseudo_thread_id); > + key_length += TMP_TABLE_KEY_EXTRA; > + > + share= find_table(key, key_length); > + > + DBUG_RETURN(share); > +} > + > + > +/* > + Lookup TABLE_SHARE using the specified table definition key. Return NULL is > + none found. > + > + @return Success A pointer to table share object > + Failure NULL > +*/ > +TABLE_SHARE *Temporary_tables::find_table(const char *key, > + uint key_length) > +{ > + DBUG_ENTER("Temporary_tables::find_table"); > + > + TABLE_SHARE *share; > + TABLE_SHARE *result= NULL; > + > + lock_tables(); > + > + for (share= m_table_shares; share; share= share->next) > + { > + if (share->table_cache_key.length == key_length && > + !(memcmp(share->table_cache_key.str, key, key_length))) > + { > + result= share; > + break; > + } > + } > + > + unlock_tables(); > + > + DBUG_RETURN(result); > +} > + > + > +/* > + Lookup TABLE_SHARE based on the specified key. This key, however, is not > + the usual key used for temporary tables. It does not contain server_id & > + pseudo_thread_id. This function is essentially used use to check whether > + there is any temporary table which _shadows_ a base table. > + (see: Query_cache::send_result_to_client()) > + > + @return Success A pointer to table share object > + Failure NULL > +*/ > +TABLE_SHARE *Temporary_tables::find_table_reduced_key_length(const char *key, > + uint key_length) > +{ > + DBUG_ENTER("Temporary_tables::find_table_reduced_key_length"); > + > + TABLE_SHARE *share; > + TABLE_SHARE *result= NULL; > + > + lock_tables(); > + > + for (share= m_table_shares; share; share= share->next) > + { > + if ((share->table_cache_key.length - TMP_TABLE_KEY_EXTRA) == key_length && > + !(memcmp(share->table_cache_key.str, key, key_length))) > + { > + result= share; > + break; > + } > + } > + > + unlock_tables(); > + > + DBUG_RETURN(result); > +} > + > + > +/* > + Lookup the list of opened temporary tables using the specified > + db/table_name. Return NULL is none found. > + > + @return Success A pointer to table object > + Failure NULL > +*/ > +TABLE *Temporary_tables::find_open_table(const char *db, > + const char *table_name) > +{ > + DBUG_ENTER("Temporary_tables::find_open_table"); > + > + TABLE *table; > + char key[MAX_DBKEY_LENGTH]; > + uint key_length; > + > + if (wait_for_prior_commit()) > + { > + DBUG_RETURN(NULL); /* Failure */ > + } > + > + key_length= create_table_def_key(key, db, table_name); > + > + table= find_open_table(key, key_length); > + > + DBUG_RETURN(table); > +} > + > + > +/* > + Lookup the list of opened temporary tables using the specified > + key. Return NULL is none found. > + > + @return Success A pointer to table object > + Failure NULL > +*/ > +TABLE *Temporary_tables::find_open_table(const char *key, > + uint key_length) > +{ > + DBUG_ENTER("Temporary_tables::find_open_table"); > + > + TABLE *table, *result= NULL; > + > + for (table= m_opened_tables; table; table= table->next) > + { > + if (table->s->table_cache_key.length == key_length && > + !(memcmp(table->s->table_cache_key.str, key, key_length))) > + { > + result= table; > + break; > + } > + } > + > + DBUG_RETURN(result); > +} > + > + > +/* > + Create a temporary table, open it and return the TABLE handle. > + > + @param hton [in] Handlerton > + @param frm [in] Binary frm image > + @param path [in] File path (without extension) > + @param db [in] Schema name > + @param table_name [in] Table name > + @param open_in_engine [in] Whether open table in SE > + > + > + @return Success A pointer to table object > + Failure NULL > +*/ > +TABLE *Temporary_tables::create_and_use_table(handlerton *hton, better create_and_open() > + LEX_CUSTRING *frm, > + const char *path, > + const char *db, > + const char *table_name, > + bool open_in_engine) > +{ > + DBUG_ENTER("Temporary_tables::create_and_use_table"); > + > + TABLE_SHARE *share; > + TABLE *table; > + > + if (wait_for_prior_commit()) > + { > + DBUG_RETURN(NULL); /* Failure */ > + } > + > + if (!(share= create_table(hton, frm, path, db, table_name))) > + { > + DBUG_RETURN(NULL); > + } > + > + if ((table= open_table(share, table_name, open_in_engine))) > + { > + DBUG_RETURN(table); > + } > + > + DBUG_RETURN(NULL); > +} > + > + > +/* > + Open a table from the specified TABLE_SHARE with the given alias. > + > + @param share [in] Table share > + @param alias [in] Table alias > + @param open_in_engine [in] Whether open table in SE > + > + @return Success A pointer to table object > + Failure NULL > +*/ > +TABLE *Temporary_tables::open_table(TABLE_SHARE *share, > + const char *alias, > + bool open_in_engine) > +{ > + DBUG_ENTER("Temporary_tables::open_table"); > + > + TABLE *table; > + > + if (wait_for_prior_commit()) > + { > + DBUG_RETURN(NULL); /* Failure */ > + } > + > + if (!(table= (TABLE *) my_malloc(sizeof(TABLE), MYF(MY_WME)))) > + { > + DBUG_RETURN(NULL); /* Out of memory */ > + } > + > + if (open_table_from_share(m_thd, share, alias, > + (open_in_engine) ? > + (uint) (HA_OPEN_KEYFILE | HA_OPEN_RNDFILE | > + HA_GET_INDEX) : 0, > + (uint) (READ_KEYINFO | COMPUTE_TYPES | > + EXTRA_RECORD), > + ha_open_options, > + table, > + open_in_engine ? false : true)) > + { > + my_free(table); > + DBUG_RETURN(NULL); > + } > + > + table->reginfo.lock_type= TL_WRITE; /* Simulate locked */ > + table->grant.privilege= TMP_TABLE_ACLS; > + share->tmp_table= (table->file->has_transactions() ? > + TRANSACTIONAL_TMP_TABLE : NON_TRANSACTIONAL_TMP_TABLE); > + > + table->pos_in_table_list= 0; > + table->query_id= m_thd->query_id; > + > + lock_tables(); > + > + /* Add table to the head of table list. */ > + link<TABLE>(&m_opened_tables, table); > + > + /* Increment Slave_open_temp_table_definitions status variable count. */ > + if (m_thd->rgi_slave) > + { > + thread_safe_increment32(&slave_open_temp_tables); > + } > + > + unlock_tables(); > + > + DBUG_PRINT("tmptable", ("Opened table: '%s'.'%s' 0x%lx", table->s->db.str, > + table->s->table_name.str, (long) table)); > + DBUG_RETURN(table); > +} > + > + > +/* > + Lookup the table share list and open a table based on db/table_name. > + Return NULL if none found. > + > + @param db [in] Schema name > + @param table_name [in] Table name > + > + @return Success A pointer to table object > + Failure 0 > +*/ > +TABLE *Temporary_tables::open_table(const char *db, > + const char *table_name) > +{ > + DBUG_ENTER("Temporary_tables::open_table"); > + > + TABLE *result= 0; > + TABLE_SHARE *share; > + > + if ((share= find_table(db, table_name))) > + { > + result= open_table(share, table_name, true); > + } why this open_table(db, table_name) is doing so much less than open_table(table_list) below? > + > + DBUG_RETURN(result); > +} > + > + > +/* > + Lookup the table share list and open a table based on the specified > + TABLE_LIST element. Return false if the table was opened successfully. > + > + @param tl [in] TABLE_LIST > + > + @return false Success > + true Failure > +*/ > +bool Temporary_tables::open_table(TABLE_LIST *tl) > +{ > + DBUG_ENTER("Temporary_tables::open_table"); > + > + TABLE *table= NULL; > + TABLE_SHARE *share; > + > + /* > + Code in open_table() assumes that TABLE_LIST::table can be non-zero only > + for pre-opened temporary tables. > + */ > + DBUG_ASSERT(tl->table == NULL); > + > + /* > + This function should not be called for cases when derived or I_S > + tables can be met since table list elements for such tables can > + have invalid db or table name. > + Instead Temporary_tables::open_tables() should be used. > + */ > + DBUG_ASSERT(!tl->derived && !tl->schema_table); > + > + if (wait_for_prior_commit()) > + { > + DBUG_RETURN(true); /* Failure */ > + } why do you have it here? The old open_temporary_table() only had it below, you have it twice. > + > + lock_tables(); > + > + if (tl->open_type == OT_BASE_ONLY || m_table_shares == NULL) > + { > + DBUG_PRINT("info", ("skip_temporary is set or no temporary tables")); > + unlock_tables(); > + DBUG_RETURN(false); > + } > + > + unlock_tables(); > + > + if ((share= find_table(tl)) && > + (table= open_table(share, tl->get_table_name(), true))) Why would you open temporary tables all the time? old code didn't do that. temporary tables were automatically opened when created and automatically dropped when closed. I understand that you *might* need to open a second instance of a temporary table (but perhaps this can be avoided too), but why would close them again? just keep them open for reuse. In that case your open_table will just pick one unused TABLE from the m_opened_tables list > + { > + if (wait_for_prior_commit()) > + { > + DBUG_RETURN(true); /* Failure */ > + } > + > +#ifdef WITH_PARTITION_STORAGE_ENGINE > + if (tl->partition_names) > + { > + /* Partitioned temporary tables is not supported. */ > + DBUG_ASSERT(!table->part_info); > + my_error(ER_PARTITION_CLAUSE_ON_NONPARTITIONED, MYF(0)); > + DBUG_RETURN(true); > + } > +#endif > + > + table->query_id= m_thd->query_id; > + m_thd->thread_specific_used= true; > + /* It is neither a derived table nor non-updatable view. */ > + tl->updatable= true; > + tl->table= table; > + table->init(m_thd, tl); > + DBUG_RETURN(false); > + } > + > + if (!table && > + tl->open_type == OT_TEMPORARY_ONLY && > + tl->open_strategy == TABLE_LIST::OPEN_NORMAL) > + { > + my_error(ER_NO_SUCH_TABLE, MYF(0), tl->db, tl->table_name); > + DBUG_RETURN(true); > + } > + > + DBUG_RETURN(false); > +} > + > + > +/* > + Pre-open temporary tables corresponding to table list elements. > + > + @note One should finalize process of opening temporary tables > + by calling open_tables(). This function is responsible > + for table version checking and handling of merge tables. > + > + @param tl [in] TABLE_LIST > + > + @return false On success. If a temporary table exists > + for the given element, tl->table is set. > + true On error. my_error() has been called. > +*/ > +bool Temporary_tables::open_tables(TABLE_LIST *tl) > +{ > + DBUG_ENTER("Temporary_tables::open_tables"); > + > + TABLE_LIST *first_not_own; > + > + if (wait_for_prior_commit()) > + { > + DBUG_RETURN(NULL); /* Failure */ > + } why do you wait_for_prior_commit here? old open_temporary_tables didn't do that, because every individual open_table() below waits for prior commit too. > + > + first_not_own= m_thd->lex->first_not_own_table(); > + > + for (TABLE_LIST *table= tl; > + table && table != first_not_own; > + table= table->next_global) > + { > + if (table->derived || table->schema_table) > + { > + /* > + Derived and I_S tables will be handled by a later call to open_tables(). > + */ > + continue; > + } > + > + if ((m_thd->temporary_tables.open_table(table))) > + { > + DBUG_RETURN(true); > + } > + } > + > + DBUG_RETURN(false); > +} > + > + > +/* > + Close a temporary table. > + > + @param table [in] Table handle > + > + @return false Success > + true Error > +*/ > +bool Temporary_tables::close_table(TABLE *table) > +{ > + DBUG_ENTER("Temporary_tables::close_table"); > + DBUG_PRINT("tmptable", ("closing table: '%s'.'%s' 0x%lx alias: '%s'", > + table->s->db.str, table->s->table_name.str, > + (long) table, table->alias.c_ptr())); > + > + /* Delete the table from table list */ > + unlink<TABLE>(&m_opened_tables, table); > + > + free_io_cache(table); > + closefrm(table, false); > + my_free(table); > + > + /* Decrement Slave_open_temp_table_definitions status variable count. */ > + if (m_thd->rgi_slave) > + { > + thread_safe_decrement32(&slave_open_temp_tables); > + } > + > + DBUG_RETURN(false); > +} > + > +/* > + Close all the opened table. When 'all' is set to false, tables opened by > + handlers and ones with query_id different than that of m_thd will not be > + be closed. Currently, false (success) is always returned. > + > + @param all [in] Whether to close all tables? > + > + @return false Success > + true Failure > +*/ > +bool Temporary_tables::close_tables(bool all) > +{ > + TABLE *table; > + TABLE *next; > + > + table= m_opened_tables; > + > + while(table) { > + next= table->next; > + > + if (all || ((table->query_id == m_thd->query_id) && > + !(table->open_by_handler))) > + { > + mysql_lock_remove(m_thd, m_thd->lock, table); > + close_table(table); > + } > + > + table= next; > + } > + return false; > +} > + > + > +/* > + Write query log events with "DROP TEMPORARY TABLES .." for each pseudo > + thread to the binary log. > + > + @return false Success > + true Error > +*/ > +bool Temporary_tables::write_query_log_events() > +{ > + DBUG_ENTER("Temporary_tables::write_query_log_events"); > + DBUG_ASSERT(!m_thd->rgi_slave); > + > + TABLE_SHARE *share; > + TABLE_SHARE *next; > + TABLE_SHARE *prev_share; > + // Assume thd->variables.option_bits has OPTION_QUOTE_SHOW_CREATE. > + bool was_quote_show= true; > + bool error= 0; > + bool found_user_tables= false; > + // Better add "IF EXISTS" in case a RESET MASTER has been done. > + const char stub[]= "DROP /*!40005 TEMPORARY */ TABLE IF EXISTS "; > + char buf[FN_REFLEN]; > + > + /* > + Return in case there are no temporary tables or binary logging is > + disabled. > + */ > + if (!(m_table_shares && mysql_bin_log.is_open())) > + { > + DBUG_RETURN(false); > + } > + > + String s_query(buf, sizeof(buf), system_charset_info); > + s_query.copy(stub, sizeof(stub) - 1, system_charset_info); > + > + /* > + Insertion sort of temporary tables by pseudo_thread_id to build ordered > + list of sublists of equal pseudo_thread_id. > + */ why does it have to be sorted? (I know that the old code also sorted the list, but I still cannot understand why) > + > + for (prev_share= m_table_shares, share= prev_share->next; > + share; > + prev_share= share, share= share->next) > + { > + TABLE_SHARE *prev_sorted; /* Same as for prev_share */ > + TABLE_SHARE *sorted; > + > + if (is_user_table(share)) > + { > + if (!found_user_tables) > + found_user_tables= true; > + > + for (prev_sorted= NULL, sorted= m_table_shares; > + sorted != share; > + prev_sorted= sorted, sorted= sorted->next) > + { > + if (!is_user_table(sorted) || > + tmpkeyval(sorted) > tmpkeyval(share)) > + { > + /* > + Move into the sorted part of the list from the unsorted. > + */ > + prev_share->next= share->next; > + share->next= sorted; > + if (prev_sorted) > + { > + prev_sorted->next= share; > + } > + else > + { > + m_table_shares= share; > + } > + share= prev_share; > + break; > + } > + } > + } > + } > + > + /* > + We always quote db, table names though it is slight overkill. > + */ it's not an overkill, it's really needed > + if (found_user_tables && > + !(was_quote_show= MY_TEST(m_thd->variables.option_bits & > + OPTION_QUOTE_SHOW_CREATE))) > + { > + m_thd->variables.option_bits |= OPTION_QUOTE_SHOW_CREATE; > + } > + > + /* > + Scan sorted temporary tables to generate sequence of DROP. > + */ > + for (share= m_table_shares; share; share= next) > + { > + if (is_user_table(share)) > + { > + bool save_thread_specific_used= m_thd->thread_specific_used; > + my_thread_id save_pseudo_thread_id= m_thd->variables.pseudo_thread_id; > + char db_buf[FN_REFLEN]; > + String db(db_buf, sizeof(db_buf), system_charset_info); > + > + /* > + Set pseudo_thread_id to be that of the processed table. > + */ > + m_thd->variables.pseudo_thread_id= tmpkeyval(share); > + > + db.copy(share->db.str, share->db.length, system_charset_info); > + /* > + Reset s_query() if changed by previous loop. > + */ > + s_query.length(sizeof(stub) - 1); > + > + /* > + Loop forward through all tables that belong to a common database > + within the sublist of common pseudo_thread_id to create single > + DROP query. > + */ > + for (; > + share && is_user_table(share) && > + tmpkeyval(share) == m_thd->variables.pseudo_thread_id && > + share->db.length == db.length() && > + memcmp(share->db.str, db.ptr(), db.length()) == 0; > + share= next) > + { > + /* > + We are going to add ` around the table names and possible more > + due to special characters. > + */ > + append_identifier(m_thd, &s_query, share->table_name.str, > + strlen(share->table_name.str)); you don't need strlen(share->table_name.str) because you can write share->table_name.length instead :) (may be this applies to other strlen's too) > + s_query.append(','); > + next= share->next; > + } > + > + m_thd->clear_error(); > + CHARSET_INFO *cs_save= m_thd->variables.character_set_client; > + m_thd->variables.character_set_client= system_charset_info; > + m_thd->thread_specific_used= true; > + > + Query_log_event qinfo(m_thd, s_query.ptr(), > + s_query.length() - 1 /* to remove trailing ',' */, > + false, true, false, 0); > + qinfo.db= db.ptr(); > + qinfo.db_len= db.length(); > + m_thd->variables.character_set_client= cs_save; > + > + m_thd->get_stmt_da()->set_overwrite_status(true); > + if ((error= (mysql_bin_log.write(&qinfo) || error))) > + { > + /* > + If we're here following THD::cleanup, thence the connection > + has been closed already. So lets print a message to the > + error log instead of pushing yet another error into the > + stmt_da. > + > + Also, we keep the error flag so that we propagate the error > + up in the stack. This way, if we're the SQL thread we notice > + that close_temporary_tables failed. (Actually, the SQL > + thread only calls close_temporary_tables while applying old s/close_temporary_tables/Temporary_tables::cleanup/ in the comment > + Start_log_event_v3 events.) > + */ > + sql_print_error("Failed to write the DROP statement for " > + "temporary tables to binary log"); > + } > + > + m_thd->get_stmt_da()->set_overwrite_status(false); > + m_thd->variables.pseudo_thread_id= save_pseudo_thread_id; > + m_thd->thread_specific_used= save_thread_specific_used; > + } > + else > + { > + next= share->next; > + } > + } > + > + if (!was_quote_show) > + { > + /* > + Restore option. > + */ > + m_thd->variables.option_bits&= ~OPTION_QUOTE_SHOW_CREATE; > + } > + > + DBUG_RETURN(error); > +} > + > + > +/* > + Rename a temporary table. > + > + @param table [in] Table handle > + @param db [in] New schema name > + @param table_name [in] New table name > + > + @return false Success > + true Error > +*/ > +bool Temporary_tables::rename_table(TABLE *table, > + const char *db, > + const char *table_name) > +{ > + DBUG_ENTER("Temporary_tables::rename_table"); > + > + char *key; > + uint key_length; > + TABLE_SHARE *share= table->s; > + > + if (!(key= (char *) alloc_root(&share->mem_root, MAX_DBKEY_LENGTH))) > + { > + DBUG_RETURN(true); > + } > + > + /* > + Temporary tables are renamed by simply changing their table definition key. > + */ > + key_length= create_table_def_key(key, db, table_name); > + share->set_table_cache_key(key, key_length); > + > + DBUG_RETURN(false); > +} > + > + > +/* > + Drop a temporary table. > + > + Try to locate the table in the list of thd->temporary_tables. > + If the table is found: > + - If the table is being used by some outer statement, i.e. > + ref_count > 1, we only close the given table and return. > + - If the table is locked with LOCK TABLES or by prelocking, > + unlock it and remove it from the list of locked tables > + (THD::lock). Currently only transactional temporary tables > + are locked. > + - Close the temporary table, remove its .FRM. > + - Remove the table share from the list of temporary table shares. > + > + This function is used to drop user temporary tables, as well as > + internal tables created in CREATE TEMPORARY TABLE ... SELECT > + or ALTER TABLE. Even though part of the work done by this function > + is redundant when the table is internal, as long as we > + link both internal and user temporary tables into the same > + temporary tables list, it's impossible to tell here whether > + we're dealing with an internal or a user temporary table. why is it impossible? there is is_user_table() function. I know that it's broken, but it should be fixed - it's used elsewhere. > + > + @param thd [in] Thread handler > + @param table [in] Temporary table to be deleted > + @param is_trans [out] Is set to the type of the table: > + transactional (e.g. innodb) as true or > + non-transactional (e.g. myisam) as false. fix the comment to match the function prototype, please. don't forget to explain why do you need delete_in_engine parameter (e.g. delete_in_engine is false in ALTER TABLE) > + > + @retval 0 the table was found and dropped successfully. > + @retval -1 the table is in use by a outer query retval is wrong > +*/ > + > + > +/* > + @return false Table was either dropped or closed in > + case multiple open tables were found > + referring the table share. > + true Error > +*/ > +bool Temporary_tables::drop_table(TABLE *table, > + bool *is_trans, > + bool delete_in_engine) rename 'delete_in_engine' please, because it also includes removing the frm file, not only "in engine". I cannot think of a good name, sorry :( > +{ > + DBUG_ENTER("Temporary_tables::drop_table"); > + > + TABLE_SHARE *share; > + handlerton *hton; > + uint ref_count= 0; > + bool result; > + > + DBUG_ASSERT(table); > + DBUG_PRINT("tmptable", ("Dropping table: '%s'.'%s'", > + table->s->db.str, table->s->table_name.str)); > + old code had here /* Table might be in use by some outer statement. */ if (table->query_id && table->query_id != thd->query_id) { my_error(ER_CANT_REOPEN_TABLE, MYF(0), table->alias.c_ptr()); DBUG_RETURN(-1); } the intention is not to allow a temporary table being dropped from a trigger or a stored function, if the table is used by the outer statement. How do you solve this now? Apparently you do, somehow, because there is a test case for it. > + lock_tables(); > + > + if (is_trans) > + *is_trans= table->file->has_transactions(); > + > + share= table->s; > + hton= share->db_type(); > + > + /* > + Iterate over the list of open tables to find the number of tables > + referencing this table share. > + */ > + for (TABLE *tab= m_opened_tables; tab; tab= tab->next) > + { > + if (tab->s == share) > + { > + ref_count ++; Strictly speaking, you can store a list of TABLE's in the TABLE_SHARE - that is, make TABLE_SHARE have a pointer to the list of its own TABLE's. That'd be particularly easy, if you introduce TMP_TABLE_SHARE as I've mentioned above But on the other hand, we don't expect many temporary tables opened at the same time, so this list is supposed to be short, right? Then this optimization doesn't matter practically. > + } > + } > + > + DBUG_ASSERT(ref_count > 0); > + > + /* > + If LOCK TABLES list is not empty and contains this table, unlock the table > + and remove the table from this list. > + */ > + mysql_lock_remove(m_thd, m_thd->lock, table); > + > + if (close_table(table)) > + { > + result= true; > + goto end; > + } > + > + /* There are other tables referencing this table share. */ > + if (ref_count > 1) > + { > + result= false; so, it is not considered an error? why? > + goto end; > + } > + > + if (delete_in_engine) > + { > + rm_temporary_table(hton, share->path.str); > + } > + > + /* Delete the share from table share list */ > + unlink<TABLE_SHARE>(&m_table_shares, share); > + > + free_table_share(share); > + my_free(share); > + > + /* Decrement Slave_open_temp_table_definitions status variable count. */ > + if (m_thd->rgi_slave) > + { > + thread_safe_decrement32(&slave_open_temp_table_definitions); > + } > + > + result= false; > + > +end: > + unlock_tables(); > + > + DBUG_RETURN(result); > +} > + > + > +/* > + Create a table definition key. > + > + @param key [out] Buffer for the key to be created (must > + be of size MAX_DBKRY_LENGTH) > + @param db [in] Database name > + @param table_name [in] Table name > + > + @return Key length. > + > + @note > + The table key is create from: > + db + \0 > + table_name + \0 > + > + Additionally, we add the following to make each temporary table unique on > + the slave. > + > + 4 bytes of master thread id > + 4 bytes of pseudo thread id > +*/ > + > +uint Temporary_tables::create_table_def_key(char *key, const char *db, > + const char *table_name) > +{ > + DBUG_ENTER("Temporary_tables::create_table_def_key"); > + > + uint key_length; > + > + key_length= tdc_create_key(key, db, table_name); > + int4store(key + key_length, m_thd->variables.server_id); > + int4store(key + key_length + 4, m_thd->variables.pseudo_thread_id); > + key_length += TMP_TABLE_KEY_EXTRA; > + > + DBUG_RETURN(key_length); > +} > + > + > +/** > + Delete a temporary table. > + > + @param base [in] Handlerton for table to be deleted. > + @param path [in] Path to the table to be deleted (i.e. path > + to its .frm without an extension). > + > + @return false Success > + true Error > +*/ > +bool Temporary_tables::rm_temporary_table(handlerton *base, const char *path) > +{ > + bool error= false; > + handler *file; > + char frm_path[FN_REFLEN + 1]; > + > + DBUG_ENTER("Temporary_tables::rm_temporary_table"); > + > + strxnmov(frm_path, sizeof(frm_path) - 1, path, reg_ext, NullS); > + if (mysql_file_delete(key_file_frm, frm_path, MYF(0))) > + error= true; > + > + file= get_new_handler((TABLE_SHARE*) 0, current_thd->mem_root, base); > + if (file && file->ha_delete_table(path)) > + { > + error= true; > + sql_print_warning("Could not remove temporary table: '%s', error: %d", > + path, my_errno); > + } > + > + delete file; > + DBUG_RETURN(error); > +} > + > + > +bool Temporary_tables::wait_for_prior_commit() > +{ > + DBUG_ENTER("Temporary_tables::wait_for_prior_commit"); > + > + /* > + Temporary tables are not safe for parallel replication. They were > + designed to be visible to one thread only, so have no table locking. > + Thus there is no protection against two conflicting transactions > + committing in parallel and things like that. > + > + So for now, anything that uses temporary tables will be serialised > + with anything before it, when using parallel replication. > + > + TODO: We might be able to introduce a reference count or something > + on temp tables, and have slave worker threads wait for it to reach > + zero before being allowed to use the temp table. Might not be worth > + it though, as statement-based replication using temporary tables is > + in any case rather fragile. > + */ > + if (m_thd->rgi_slave && > + m_thd->rgi_slave->is_parallel_exec && > + m_thd->wait_for_prior_commit()) > + { > + DBUG_RETURN(true); > + } > + > + DBUG_RETURN(false); > +} > + > + > +void Temporary_tables::mark_tables_as_free_for_reuse() { > + TABLE *table; > + TABLE *next; > + > + DBUG_ENTER("mark_temp_tables_as_free_for_reuse"); > + > + if (m_thd->query_id == 0) > + { > + /* Thread has not executed any statement and has not used any tmp tables */ > + DBUG_VOID_RETURN; > + } > + > + lock_tables(); > + > + if (!m_thd->temporary_tables.is_empty()) do you need that? it checks whether m_table_shares or rgi_slave->rli->save_temp_table_shares is NULL. But after lock_tables() m_table_shares is equal to rgi_slave->rli->save_temp_table_shares, so it's enough to check m_table_shares. And if m_table_shares is NULL then m_opened_tables is also NULL, so the whole if() condition is redundant it only duplicates this while() below. > + { > + > + table= m_opened_tables; > + > + while(table) { > + next= table->next; > + > + if ((table->query_id == m_thd->query_id) && ! table->open_by_handler) > + { > + mysql_lock_remove(m_thd, m_thd->lock, table); > + close_table(table); I don't get it. Old code had mark_tmp_table_for_reuse() here, you have mysql_lock_remove and close_table. But temporary tables aren't locked, are they? And constantly closing/reopening temporary tables is a waste of resources, you can keep them open until they're dropped. > + } > + > + table= next; > + } > + } > + > + unlock_tables(); Old code had here: if (rgi_slave) { /* Temporary tables are shared with other by sql execution threads. As a safety messure, clear the pointer to the common area. */ thd->temporary_tables= 0; } shouldn't you have put it into unlock_tables() ? (yes, it was "messure" in the old comment, not my typo :) > + > + DBUG_VOID_RETURN; > +} > + > + > +void Temporary_tables::lock_tables() > +{ > + rpl_group_info *rgi_slave= m_thd->rgi_slave; > + if (rgi_slave) > + { > + mysql_mutex_lock(&rgi_slave->rli->data_lock); > + m_table_shares= rgi_slave->rli->save_temp_table_shares; > + } > +} > + > + > +void Temporary_tables::unlock_tables() > +{ > + rpl_group_info *rgi_slave= m_thd->rgi_slave; > + if (rgi_slave) > + { > + rgi_slave->rli->save_temp_table_shares= m_table_shares; > + mysql_mutex_unlock(&rgi_slave->rli->data_lock); > + } > +} > + Regards, Sergei Chief Architect MariaDB and security(a)mariadb.org

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[Maria-developers] Effect of gcc optimization levels
by Sergey Vojtovich 17 May '16

17 May '16

Hi Wlad, Last week I promised to benchmark effect of various gcc optimization levels. Here're results: -O0 418TPS -Os 663TPS -O1 759TPS -O2 807TPS -O3 812TPS -O3 -unroll2 -ip 812TPS (default) -Ofast 819TPS Benchmark was done on a Sandy Bridge system running Ubuntu 12.10. Single thread OLTP RO, performance schema off. Regards, Sergey

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[Maria-developers] Please review MDEV-6353 my_ismbchar() and my_mbcharlen() refactoring
by Alexander Barkov 17 May '16

17 May '16

Hi Sergei, Please review a partial patch for MDEV-6353. It removes my_mbcharlen() in all remaining pieces of the code, except LOAD DATA and SELECT INTO OUTFILE. I'll do LOAD DATA and SELECT INTO OUTFILE in a separate patch. Thanks.

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[Maria-developers] MDEV-10035 DBUG_ASSERT on CREATE VIEW v1 AS SELECT * FROM t1 FOR UPDATE
by Alexander Barkov 16 May '16

16 May '16

Hi Sanja, Sergei, Sanja, you asked me to review a patch for MDEV-10035: revision-id: 4ffe2295e78538dde93df078421726f0c5a7d2a2 (mariadb-10.2.0-29-g4ffe229) parent(s): b79944950e5e5db40cf7ad49061edf5f105512c4 committer: Oleksandr Byelkin timestamp: 2016-05-15 15:25:33 +0200 message: I earlier also proposed the same idea to disallow FOR UPDATE, and even created a patch disallowing this in the parser syntactically (see attached). But Sergei worried that we should not do it this way and proposed some other solutions. Please see Sergei's comments in: MDEV-10063 VIEWs and subqueries with FOR UPDATE Sergei, are you still in doubts? Thanks.

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Re: [Maria-developers] 7e70658: MDEV-9947: COM_MULTI united response
by Sergei Golubchik 14 May '16

14 May '16

Hi, Sanja! Looks ok to me. You're simply disable net_flush as far as I can see. For comments and questions, see below... On May 09, Oleksandr Byelkin wrote: > revision-id: 7e70658d1e88b4a255e3c28426f8259e5e596a85 (mariadb-10.2.0-20-g7e70658) > parent(s): c0a59b46be5be341bd6ffc9fe188a236ced46522 > committer: Oleksandr Byelkin > timestamp: 2016-05-09 15:26:18 +0200 > message: > > MDEV-9947: COM_MULTI united response > diff --git a/sql/protocol.cc b/sql/protocol.cc > index 9e52870..0bf2a05 100644 > --- a/sql/protocol.cc > +++ b/sql/protocol.cc > @@ -208,7 +208,8 @@ bool net_send_error(THD *thd, uint sql_errno, > const char *err, > bool > net_send_ok(THD *thd, > uint server_status, uint statement_warn_count, > - ulonglong affected_rows, ulonglong id, const char > *message) > + ulonglong affected_rows, ulonglong id, const char > *message, > + bool postpond_flush) "postpone" or "delay" or even (looking at how you use it) "skip" > { > NET *net= &thd->net; > uchar buff[MYSQL_ERRMSG_SIZE+10],*pos; > diff --git a/sql/sql_error.h b/sql/sql_error.h > index e03c3dd..98c8d77 100644 > --- a/sql/sql_error.h > +++ b/sql/sql_error.h > @@ -704,6 +704,12 @@ class Diagnostics_area > const char *message() const > { DBUG_ASSERT(m_status == DA_ERROR || m_status == DA_OK); return > m_message; } > > + bool postpond_flush() const > + { DBUG_ASSERT(m_status == DA_OK); return m_postpond_flush; } What if one uses COM_MULTI to send two commands and the first fails (results in an error). Will the second be executed? (This is a question about *sending*, client-to-server, not about MDEV-9947) > + > + void set_postpond_flush() > + { m_postpond_flush= TRUE; } > + > uint sql_errno() const > { DBUG_ASSERT(m_status == DA_ERROR); return m_sql_errno; } > > @@ -857,6 +863,8 @@ class Diagnostics_area > /** Set to make set_error_status after set_{ok,eof}_status > possible. */ > bool m_can_overwrite_status; A comment would've been nice... > + bool m_postpond_flush; > + > /** Message buffer. Can be used by OK or ERROR status. */ > char m_message[MYSQL_ERRMSG_SIZE]; Regards, Sergei Chief Architect MariaDB and security(a)mariadb.org

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