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[Maria-developers] Binary is built, but does it have Cassandra-v2 (Was: Re: June, 30th meeting: outcome)
by Sergey Petrunia 02 Jun '16

02 Jun '16

On Wed, Jun 01, 2016 at 08:46:45PM +0100, Charles Muurmu wrote: > Hi Sergei, > > make now runs to completion and make install as well I'm a bit surprised. I'm looking at https://github.com/charlesmuurmu/server/blob/MDEV-8947/storage/cassandra-v2… And I still see two "IF(...)" lines but three "ENDIF" lines. Are you sure cassandra-v2 gets built and linked? As I said earlier: >> Do you know how to check if mysqld binary has storage engine linked? >> >> I think this would work on OS X, too: >> >> "nm mysqld | grep cassandra" >> >> this command must produce non-empty output (for an example, try "nm >> mysqld | grep myisam"). If you've made any changes to storage/cassandra-v2, please commit them and push. BR Sergei -- Sergei Petrunia, Software Developer MariaDB Corporation | Skype: sergefp | Blog: http://s.petrunia.net/blog

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[Maria-developers] MDEV-10101 Wrong error message of SELECT 1 UNION (SELECT 1 FROM t1 GROUP BY 1 WITH ROLLUP)
by Alexander Barkov 01 Jun '16

01 Jun '16

Hello Sergei, Please review a patch for MDEV-10101. Thanks.

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[Maria-developers] Please review MDEV-10124 Incorrect usage of CUBE/ROLLUP and ORDER BY with GROUP_CONCAT(a ORDER BY a)
by Alexander Barkov 01 Jun '16

01 Jun '16

Hi Sergei, Please review MDEV-10124 Thanks. Here's the story of the related code: 1. The original patch from Wax commit: 0b505fb437eedd1b31c99888247c2259539c095b date: Tue Mar 18 03:07:40 2003 opt_gorder_clause reused the regular order_clause, which already had some protection against ROLLUP queries: order_clause: ORDER_SYM BY { LEX *lex=Lex; if (lex->current_select->linkage != GLOBAL_OPTIONS_TYPE && lex->current_select->select_lex()->olap != UNSPECIFIED_OLAP_TYPE) { net_printf(lex->thd, ER_WRONG_USAGE, "CUBE/ROLLUP", "ORDER BY"); YYABORT; } } order_list; The assumption that ORDER BY in group_concat() had to have the same ROLLUP restriction (with order_clause) was wrong. Moreover, GROUP_CONCAT() in select_item_list was not affected by this restriction, because WITH ROLLUP goes after select_item_list and therefore sel->olap is always equal to UNSPECIFIED_OLAP_TYPE during select_item_list. GROUP BY was not affected: - it goes before WITH ROLLUP and sel->olap is still UNSPECIFIED_OLAP_TYPE - Aggregate functions like AVG(), GROUP_CONCAT() in GROUP BY are not allowed So only GROUP_CONCAT() in HAVING and ORDER BY clauses were erroneously affected by this restriction. 2. Bug#27848 rollup in union part causes error with order of union commit: 3f6073ae63f9cb738cb6f0a6a8136e1d21ba0e1b Author: unknown <igor(a)olga.mysql.com> 2007-12-15 01:42:46 The condition in the ROLLUP protection code became more complex. Note, opt_gconcat_order still reuses the regular order_clause. 3. Bug#16347426 ASSERTION FAILED: (SELECT_INSERT && !TABLES->NEXT_NAME_RESOLUTION_TABLE) || !TAB commit: 2d83663380f5c0ea720e31f51898912b0006cd9f author: Chaithra Gopalareddy <chaithra.gopalareddy(a)oracle.com> date: 2013-04-14 06:00:49 opt_gorder_clause was refactored not to use order_clause and collect information directly to select->gorder_list. The ROLLUP protection code was duplicated from order_clause to the new version of opt_gorder_clause.

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[Maria-developers] Please review MDEV-9497 oqgraph fails to build with boost 1.60
by Vicențiu Ciorbaru 31 May '16

31 May '16

Hi Sergei! Can you please review the following patch for MariaDB 10.0. It fixes a compilation failure in Debian/Ubuntu when boost 1.60 or later is installed. I've looked into the code and checked if the #ifdef'ed code is used anywhere. There is absolutely no reference to it. I doubt it affect anything. Thanks! Vicentiu +--- mariadb-10.0-10.0.25.orig/storage/oqgraph/oqgraph_shim.h ++++ mariadb-10.0-10.0.25/storage/oqgraph/oqgraph_shim.h +@@ -254,7 +254,7 @@ namespace boost - #if BOOST_VERSION >= 104601 + #if BOOST_VERSION >= 104601 && BOOST_VERSION < 106000 template <> struct graph_bundle_type<oqgraph3::graph> {

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[Maria-developers] GSoC weekly reports (Unique indexes for blobs)
by Shubham Barai 30 May '16

30 May '16

GSoC (week 1) Hello everyone, After developing a prototype for MyISAM ,there were some issues to be resolved. One of the issues is related to error regarding a duplicate entry. So if there is a duplicate entry for a particular key in a row, it generates an error for another key. After debugging, I found out that it was due to mismatch of a key number between sql layer and MyISAM file. Keys are stored in the order of user's input in sql layer. In table2myisam function, this order is changed as each key is either stored as mi_keydef or mi_uniquedef. In mi_create, for each unique definition, an extra key is created in the form of mi_keydef and stored in MYI file which creates the issue of mismatch. I tried to solve the issue by adding extra member sql_key_no to mi_keydef and mi_uniquedef.I also modified mi_keydef_write and mi_keydef_read to support a new member but after compiling, I got some error related to a key file. Also with the help of my mentor, I found out that it could result in compatibility issues related to old MyISAM file. So currently, I am trying to solve this using another approach. Regards, Shubham

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Re: [Maria-developers] [Commits] 53696a6: MDEV-10004: Galera's pc.recovery process fails in 10.1 with systemd
by Sergey Vojtovich 27 May '16

27 May '16

Hi Nirbhay, Looks good to push. On Thu, May 26, 2016 at 11:52:04PM -0400, Nirbhay Choubey wrote: > revision-id: 53696a63a2a517e04bf27382184162da50994ecb (mariadb-10.1.14-4-g53696a6) > parent(s): 9a1c4e900b98fdb9940aab57c895753f175c2bd8 > author: Nirbhay Choubey > committer: Nirbhay Choubey > timestamp: 2016-05-26 23:52:04 -0400 > message: > > MDEV-10004: Galera's pc.recovery process fails in 10.1 with systemd ...skip... > +# Safety checks > +if [ -n "$log_file" -a -f "$log_file" ]; then > + [ "$euid" = "0" ] && chown $user $log_file > + chmod 600 $log_file > +else > + echo "WSREP: mktemp failed" Should this be "log" instead of "echo"? Regards, Sergey

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Re: [Maria-developers] Aggregate Stored Functions
by Varun Gupta 27 May '16

27 May '16

Hi, I have added the AGGREGATE keyword to the parser . Here is the link to the repository https://github.com/varunraiko/aggregate-functions . On Wed, May 18, 2016 at 9:50 PM, Sanja <sanja.byelkin(a)gmail.com> wrote: > Hi! > > If we get it automatically then of course it should be done, but I > doubts... We will see. > > On Wed, May 18, 2016 at 6:18 PM, Sergei Golubchik <serg(a)mariadb.org> > wrote: > >> Hi, Sanja! >> >> On May 18, Sanja wrote: >> > > >> > > No, sorry, this doesn't work. It works for procedures, but not for >> > > functions. See: >> > > >> > > CREATE FUNCTION f1 (a INT) RETURNS INT >> > > BEGIN >> > > RETURN SELECT f2(val) FROM t1 WHERE id=a; >> > > END; >> > > >> > > CREATE FUNCTION f2 (b INT) RETURNS INT >> > > BEGIN >> > > ... >> > > FETCH GROUP NEXT ROW; >> > > ... >> > > RETURN something; >> > > END; >> > > >> > > Here, depending on what function is declared aggregate you will have >> > > different results. >> > >> > I think in the first implementation we can have only one level >> > functions. if we will have time we can then expand it for calls of >> > other functions. But first the mechanism of temporary leaving then >> > entering functions should be created (then it can be reused for >> > recursive calls. >> >> First implementation - may be (althought I don't understand why - this >> requires no extra coding, nested function calls will just work >> automatically). But the first implementation should not choose to use >> the syntax that makes this extension impossible. >> >> For example, Varun's project does not include window function support. >> At all. But we will be able to add it later without redoing everything, >> exising syntax can accomodate this new feature. >> >> Regards, >> Sergei >> Chief Architect MariaDB >> and security(a)mariadb.org >> > >

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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 */ > +### 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aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa' /* 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 */ > +### @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 # 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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