The Ultimate Guide to High Availability with MariaDB

MariaDB ColumnStore 5.5.1 Release Notes

Contents

  1. Overview
  2. Notable Changes
  3. Issues Fixed
    1. Can result in a hang or crash
    2. Can result in unexpected behavior
    3. Related to install and upgrade
  4. Platforms
  5. Installation Instructions
  6. Upgrade Instructions

Overview

MariaDB Enterprise ColumnStore is a columnar storage engine included with MariaDB Enterprise Server. This is the third release in the Enterprise ColumnStore 5 series.

This release of MariaDB Enterprise ColumnStore is included with MariaDB Enterprise Server 10.5.8-5.

This release is of General Availability (GA) maturity.

MariaDB Enterprise ColumnStore 5.5.1 was released on 2020-12-14.

  • Documentation

Notable Changes

  • ColumnStore VARCHAR was sized in bytes, which required customers with multi-byte data to account for the byte variance within their capacity calculations and column definitions. VARCHAR is now sized by characters (which may be multi-byte) in alignment to the behavior of InnoDB and as required by SQL standard (ISO/IEC 9075:2016 feature E021 - Character string types). (MCOL-2000)
  • Non-equality comparison operators previously produced storage engine-specific results with NOPAD collations. This behavior now aligns to the behavior of InnoDB. (MCOL-4417)
  • Added ENCODE() and DECODE() function support. (MCOL-4323)
  • ColumnStore now respects case-insensitive comparison during JOIN when called for by the specified collation. (MCOL-495, MCOL-4064)
  • Enhanced performance of multi-node ColumnStore startup. (MCOL-4337)

Issues Fixed

Can result in a hang or crash

  • Possible crash in mariadbd when calling stored procedures in the columnstore_info database. (MCOL-4105)
  • INSERT .. SELECT hangs on cpimport when MariaDB Enterprise ColumnStore is installed in a non-default path. (MCOL-4425)

Can result in unexpected behavior

  • Incorrect error message shown when using unsupported JSON functions. (MCOL-4108)
  • Equality does not respect the NOPAD collation attribute. (MCOL-4388)
  • ROUND() function returns incorrect answer for DATE data type. (MCOL-4255, MCOL-4281)
  • calgetshowpartitions fails if MariaDB Enterprise Server started before MariaDB Enterprise ColumnStore. (MCOL-4397)
  • mcs-loadbrm and mcs-savebrm have hard coded paths to load_brm and save_brm (MCOL-4295)
  • In-place upgrade from 1.5 to 5.5 failed due to DEB package conflicts. (MCOL-4166)
  • A configuration file x-columnstore.cnf previously existed during Beta and Gamma releases of ColumnStore. This file has been removed as it is no longer required. (MCOL-4155)

Platforms

In alignment to the enterprise lifecycle, MariaDB Enterprise ColumnStore 5.5.1 is provided for:

  • CentOS 7
  • CentOS 8
  • Debian 9
  • Debian 10
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • SUSE Linux Enterprise Server 12
  • SUSE Linux Enterprise Server 15
  • Ubuntu 16.04
  • Ubuntu 18.04
  • Ubuntu 20.04

Installation Instructions

  • ColumnStore Object Storage Topology with MariaDB Enterprise Server 10.5 and MariaDB Enterprise ColumnStore 5
  • ColumnStore Shared Local Storage Topology with MariaDB Enterprise Server 10.5 and MariaDB Enterprise ColumnStore 5
  • HTAP Topology with MariaDB Enterprise Server 10.5 and MariaDB Enterprise ColumnStore 5
  • Single-Node Enterprise ColumnStore 5 with MariaDB Enterprise Server 10.5 and Object Storage
  • Single-Node Enterprise ColumnStore 5 with MariaDB Enterprise Server 10.5

Upgrade Instructions

  • Major Release Upgrades for MariaDB Enterprise ColumnStore

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