Release Notes for MariaDB Enterprise ColumnStore 5.5.1

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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.

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)

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)

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)

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