MariaDB ColumnStore 25.10.4 Release Notes

Release date: 17 Mar 2026

MariaDB ColumnStore 25.10.4 is a Stable (GA) release of MariaDB ColumnStore.

Issues fixed

Can result in hang or crash

• [MCOL-5987] - DROP TABLE doesn't release OID bit in oidbitmap

• [MCOL-4270] - DROP COLUMN IF EXISTS fails if the column is already present

• [MCOL-6083] - Post upgrade to 23.10.4, some queries are taking forever to execute..’

• [MCOL-6088] - group by alias improvement: ERROR 1178 (42000): The storage engine for the table doesn't support MCS-2016: Non supported item on the GROUP BY list.

• [MCOL-6243] - cpimport fails at fields longer than 1M like longtext and MariaDB ColumnStore crashes with "Broken pipe"

• [MCOL-6093] - Multiple PUT /config operations had arrived from primary CMAPI node shutting down a cluster

Related to performance

• [MCOL-5983] - Bit-wise operations slower than expected

Notable changes

• [MCOL-6151] - Query Accelerator select filter support

• [MCOL-6156] - Query Accelerator TPCH Q19 fix

• [MCOL-6157] - Query Accelerator TPCH Q7 fix

• [MCOL-6251] - Query Accelerator support subqueries

• [MCOL-6268] - Query Accelerator TPC-H queries with subslect with aggregate are not working (queries 2, 11 and 18)

• [MCOL-6075] - Research/Reproduce 23.10.4 Memory Allocation Related Errors

• [MCOL-6291] - Cmapi Python now 3.13.11

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