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[Maria-developers] MDEV-9709 Unexpected modification of value and warning about out of range value upon ALTER
by Alexander Barkov 11 Mar '16

11 Mar '16

Hi Elena, can you please review a patch for MDEV-9709? I'm quite sure about the code change, it's trivial. Please have a look into the tests. Thanks.

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[Maria-developers] GSoC 2016 Maxscale Filter
by Lisa Brinson 08 Mar '16

08 Mar '16

Hi everyone, My name is Lisa Brinson and I am a junior Computer science student at Oregon State University. I wish to participate in an open source project through GSoC 2016. I am proficient in C and C++ as well as git. I have looked through the proposed projects and I have developed interest in the Maxscale tasks especially the filters. I have been going through the filter API and have also looked at some sample filters in server/modules/filter directory. I will try to write my first filter(a hello world filter) to get familiar with the API. I will be submitting 3 proposals for the 3 Maxscale filters hoping one will be selected. Best regards, Lisa.

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[Maria-developers] Questions regarding GSoC 2016 and Import / Export
by Dan Ungureanu 08 Mar '16

08 Mar '16

Hello, I am a second year student currently attending University Politehnica of Bucharest and I am interested in contributing to MariaDB during this year's Google Summer of Code. I have looked at the ideas you published in the Knowledge Base [1] and two projects caught my attention. The first one is related to the import and export process related to dynamic columns [2] and the second one is related to the GIS enhancements [3]. I am willing to implement both of them, but I am not sure whether the time will allow me properly implement both of them. I cannot estimate how much effort do these projects require as I am still trying to become acquainted with the code base. I hope I am not underestimating the projects and some guidance from one of the mentors (Oleksandr Byelkin, Georg Richter or Alexey Botchkov - Holyfoot) is certainly welcome. I will focus on "Import and export popular data formats from and to dynamic columns" and as soon as I am done with this one, hopefully I will be able to work on GIS enhancements as well. Before continuing, I would like to clarify some aspects related to these projects. Import and export popular data formats from and to dynamic columns: - Can be split in four main tasks: a) adding support for arrays (vectors) in dynamic columns. Currently, dynamic columns only store dictionaries (maps); b) implement a library that can import (parse) and export (build in a specific format) data to and from dynamic columns; c) provide interface to access to the new import and export mechanism; d) provide unit tests for the new features. - The second part (b) of the project is mostly standalone and requires little edits to the project and the third part (c) will be mostly shared by the server and the C connector. - The outcome of (b) is going to be a minimal parsing and building library for various formats. - Some of the formats that I plan to support are: JSON, XML, CSV (maybe XLS too?), PHP Array, YAML, SQL (export as INSERT INTO statement?), etc. One of the key aspects I have to keep in mind when designing the library is to provide a extensible interface to quickly implement new formats in the future. - Probably, most of my work will be located in: - ./server/sql/item_*.(cc|h) - implement user defined functions - ./server/mysys/ma_dyncol.c - provide interface for user defined functions - ./server/include/ma_dyncol.h - ./mariadb-connector-c/libmariadb/mariadb_dyncol.c - provide interface in C Connector - ./mariadb-connector-c/include/mariadb_dyncol.h GIS enhancements: - This project is based on extending the current functionality related to GIS. I am not very familiar with GIS and I still have to do more research based on documents [4], [5] and [6], but the biggest part of the project consists in defining user functions for handling GIS. - I found this compliance test suite [7] for PostGIS that may come in handy. Also, I have a few other questions related to how should I proceed: - I have already read the introductory developers guide [8], the contributing guidelines [9] and will submit the MariaDB Contributor Agreement [10] as soon as possible. Is there anything else I should do before getting started? - I found no template for Google Summer of Code applications. Is there anything in particular that mentors would like to see? I was thinking of organizing my application in multiple sections, some of the most important being: Synopsis, Benefits to the Users, Project Details, Deliverables, Project Schedule and my resume. I believe that I will receive more feedback related after I will have submitted my application. - Most issues already have an assignee. Is it fine if I try and send pull requests for some of those bugs? I could not decide between whether I should send this mail to discuss or developers mailing list. Hopefully, I chose the right one. I am sorry for my long email and thank you for attention. I am looking for feedback, so please do not hesitate to send me any suggestion you might have. [1] https://mariadb.com/kb/en/mariadb/google-summer-of-code-2016/ [2] https://jira.mariadb.org/browse/CONC-125 [3] https://jira.mariadb.org/browse/MDEV-5813 [4] http://www.opengeospatial.org/standards/sfs [5] http://portal.opengeospatial.org/files/?artifact_id=25354 [6] http://www.opengeospatial.org/compliance/ [7] https://svn.osgeo.org/postgis/trunk/extras/ogc_test_suite/README [8] https://mariadb.org/get-involved/getting-started-for-developers/ [9] https://mariadb.com/kb/en/mariadb/contributing-code/ [10] https://mariadb.com/kb/en/mariadb/mca/ Best regards, Dan Ungureanu

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[Maria-developers] GSoC 2016 Maxscale Luafilter
by Pedro Moratta 08 Mar '16

08 Mar '16

Hi, My name in Pedro Mora and I am a MS Computer Science student at Milano Institute of technology. I wish to work on Maxscale filters during GSoC 2016. I am interested in working on the Lua filter because I am familiar with Lua scripting and C/C++ programming as well as working Knowledge of Maxscale. I have been looking at some sample filters but could not find the luafilter mentioned as it seems the github branch https://github.com/mariadb-corporation/MaxScale/blob/luafilter/server/modul… <https://github.com/mariadb-corporation/MaxScale/blob/luafilter/server/modul…> no longer exists. Please I would love to know where the current repo for the Luafilter is located so as to see what had been done and what we would need to enhance this summer. I look forward to feedback soon. Regards, Pedro

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[Maria-developers] Enhancing mysqlbinlog (MDEV-4989 and MDEV-5993)
by Dan Ungureanu 08 Mar '16

08 Mar '16

Hello, I have been looking into MDEV-4989 [1] and MDEV-5993 [2] and as far as I know, the features requested in those two tickets have already been implemented in MySQL. However, the team decided to approach this problem in a different manner and focus more on parallel replication so the GTID implementations diverged. Now, my question is: for starters, is it enough to consider the code from MySQL as some sort of guideline when implementing these features in MariaDB? Kristian Nielsen did a great job explaining GTID in his blog posts and even though the mechanism behind the scene seems to be pretty simple, the codebase is quite massive and I have a hard time going through all of it. >From what I can understand so far, I do not believe that porting the code from MySQL to MariaDB is possible since there are a few key aspects that differ. Is that correct? I hope I made myself clear and I look forward to hearing from you. [1] https://jira.mariadb.org/browse/MDEV-4989 [2] https://jira.mariadb.org/browse/MDEV-5993 Best regards, Dan Ungureanu

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Re: [Maria-developers] [Commits] e19e45b: MDEV-9651 - Simplify audit event dispatching
by Sergei Golubchik 07 Mar '16

07 Mar '16

Hi, Sergey! On Mar 01, Sergey Vojtovich wrote: > revision-id: e19e45b23c07ef8d0679ca0ed7d93b70625e1a26 (mariadb-10.1.8-141-ge19e45b) > parent(s): e9f6c8167e238107643b9ef6228ca23976afb654 > committer: Sergey Vojtovich > timestamp: 2016-03-01 10:21:42 +0400 > message: > > MDEV-9651 - Simplify audit event dispatching > > Simplified audit event dispatching call chain from: Ok to push. Btw, you there's a conveniency helper safe_strlen() that you could've used. Regards, Sergei Chief Architect MariaDB and security(a)mariadb.org

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[Maria-developers] GSoC 2016 Maxscale Filter Implementation.
by Jason Kravitz 07 Mar '16

07 Mar '16

Hi, I am Jay Kravitz an Informations systems student at Georgetown University and I would love to work on Maxscale during GSoC 2016. I am interested in the Filter projects specifically the filter to capture incoming operations for consumption in external sources. I have build Maxscale on Ubuntu 15 and I am currently looking at some filters in the codebase to understand the filter API. I will also submit a backup proposal for the query injection filter hoping I am given the opportunity to implement one. I look forward to hearing from anyone soon. Regards, JK.

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[Maria-developers] main.delayed fails on timeout
by Alexander Barkov 03 Mar '16

03 Mar '16

Hello Monty, Sergei, Can you please have a look into: http://buildbot.askmonty.org/buildbot/builders/kvm-deb-precise-amd64/builds… Can you please give any suggestions about what we can do to fix the problem with main.delayed failing sporadically? This problem is blocking us badly in Debian. Otto can try to disable this test temporary. But it would be nice to have a real fix. Any tips would be very appreciated. Thanks!

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[Maria-developers] GSoC 2015 mysqlbinlog Enhancement.
by Rebecca Tucker 03 Mar '16

03 Mar '16

Hello everyone, I am Rebecca Tucker a MS student at University of Maryland and I wish to participate in the summer of code to work on making the mysqlbinlog tool to understand global transaction IDs. I am familiar with the tool and replication and can write documented C and C++ code. I Look forward to communicating with you soon to get more pointers on the project. Cheers, Becca.

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[Maria-developers] GSOC 2016 self Introduction
by Tapan Halani 02 Mar '16

02 Mar '16

Hello all devs, I am Tapan Halani , an undergrad student from India. I am interested in contributing code to MariaDB and am taking part in GSoC 2016 also. I have already done all the prerequisite code cloning and setup etc. and am going through MDEV-4989 , trying to understand and solve it. Looking forward to have a great time contributing. Thanks Tapan

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