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MariaDB ColumnStore 1.0.2 Alpha Release Notes

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Release date: 23 August 2016

MariaDB ColumnStore 1.0.2 is the development version of MariaDB ColumnStore. It is built by porting InfiniDB 4.6.2 on MariaDB 10.1.14.

MariaDB ColumnStore 1.0.1 is an Alpha release.

Do not use alpha releases on production systems!

For an overview of MariaDB ColumnStore see MariaDB ColumnStore Architectural Overview

MariaDB ColumnStore 1.0.2 is an Alpha release. This is the second alpha release of MariaDB ColumnStore with improvements over previous alpha release of 1.0.1.

Please provide feedback in JIRA for anything that is not working as expected so that we can fix it before we make the release available for the larger community. For general "how to questions" ask questions here or subscribe to [email protected]

Notable Changes

  • MCOL-70: systemd service support
  • MCOL-4 Build for CentOS 7
  • MCOL-5 Build for Ubuntu 16.04
  • MCOL-58 Non-root installs now works for columnstore mysql code

Bugs and Issues Fixed

Below is list of some of the bugs and issues fixed. For the complete list please see here

  • MCOL-35,MCOL-66: Concurrent DML and DDL failed
  • MCOL-140: Concurrent Insert threads generate errors
  • MCOL-254: ColumnStore is limited to two columns in a GROUP BY statement
  • MCOL-67: config.log and possibly other autoconf artifacts are in source control
  • MCOL-69: autotools based build process does not work
  • MCOL-151: Columnstore engine not available after reboot
  • MCOL-39: console command "getSystemConfig" return API for some parameter names
  • MCOL-59: name change of Calpont.xml files
  • MCOL-71:Problem changing the MariaDB release version in Columnstore build
  • MCOL-113: install_calpont_mysql.sh returns function not found errors on a new installation
  • MCOL-138: postConfigure mentions MySQL
  • MCOL-139: MariaDB ColumnStore version confusion
  • MCOL-146: build enterprise rpms from new build processes
  • MCOL-68: Makefile.in missing in oamapps/mcsadmin/
  • MCOL-64:Internal error: CAL0009: Error in dropping table from systables

Known Issues and Limitations

There are a number bugs and known limitations within this early Alpha version of MariaDB ColumnStore, the most serious of these are listed below. These are expected to be fixed way before the Beta release. There are some known security issues. They are listed here

  • MCOL-82: Subquery using IN with VIEW returns incorrect results. Queries selecting from view and using IN in where clause with a subquery on another view returns incorrect results.
  • MCOL-66, MCOL-64, MCOL-14: When multiple connection tries to perform DDL statements (Create Table/Drop Table/Alter Table) in parallel, system catalog tables get locked returning errors
    • Create Table, Drop Table and Alter Table must be done through a single connection at a time
  • MCOL-37: Following three window functions do not return correct value
    • FIRST_VALUE
    • LEAD
    • LAG
  • MCOL-75 and MCOL-74: NTH_VALUE and LAST_VALUE functions return syntax errors.
  • MCOL-73): Wide table formatted display causes frontend to return error
    • MariaDB ColumnStore supports wide tables storage
    • Displaying the query results on a large number of columns without formatting the column works
    • Displaying the query results on a large number of columns with formatting causes error at MariaDB Server level
  • MCOL-45 : CREATE PROCEDURE fails.
    • Do not use stored procedure with this Alpha version MCOL-16: LOAD DATA INFILE into datetime columns, data got saturated.
    • Do not use LOAD DATA INFILE when importing data into datetime columns
    • Use cpimport to bulk load data into MariaDB Columnstore instead. cpimports works correctly for datetime columns as well.
    • INSERT INTO works for datetime columns
  • MCOL-49: Drop table does not work if the PM node runs out of space.
  • MCOL-58: Non-Root install does not work in this release
    • Use root access to install this Alpha version
  • MCOL-39: console command "getSystemConfig" returns error for some parameter names While Millisecond and Microsecond storage is supported for datetime, time and timestamp columns, at this time the query results cannot return millisecond and microseconds.
  • UTF-8 Limitation
    • UTF-8 must be declared at the table level if the instance has been set up with a UTF-8 profile. Tables created with a non-matching character set will yield indeterminate results.
    • Viewing SQL output should be done using client software that supports UTF-8 character sets.
    • UTF-8 characters are not supported in object names.

The building of the software needs a special build environment. We're working on making it available for everyone to build.

Documentation

MariaDB ColumnStore Documentation include architecture, getting started, SQL Syntax guide, How to manage and How to load data into MariaDB ColumnStore.

Detailed Installation Guide will be available in next version of the MariaDB ColumnStore 1.0 series

Packaging

RPM and binary packages are provided for the Linux distributions supported by MariaDB ColumnStore 1.0.1 Alpha version.

  • The supported OS for this Alpha version are CentOS 6 and CentOS 7.
  • Packages can be downloaded here

Source Code

The source code of MariaDB ColumnStore is tagged at GitHub with a tag, which is identical with the version of MariaDB ColumnStore. For instance, the tag of version X.Y.Z of MariaDB ColumnStore is columnstore-X.Y.Z. Further, master always refers to the latest released non-beta version. The source code is available at these locations

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