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MariaDB is supported by SQLancer — the main repository ships a testing implementation for it. SQLancer is credited with 15 bugs in it, reported between 2019-11-11 and 2026-04-01. Its source is at MariaDB/server.

A further 4 reports were filed and rejected by the developers as invalid or duplicate. Those are kept in the dataset for transparency and are excluded from every count here.

How the bugs break down

By year reported

2019
6
2026
1
Year not recorded
8

Who found them

Found by the SQLancer project
6
Found by someone outside the project
1
Reporter not recorded
8

By status

Fixed
1
Confirmed
5
Open
1
Unknown
8

By symptom

Logic bug
5
Crash
1
Unclassified
9

By technique

Technique not recorded
9
Non-optimizing Reference Engine Construction (NoREC)
6

Why each bug counts

Listed in the project's own bug repository
9
The report names a SQLancer oracle
5
The reproducer carries SQLancer's generated schema
1

Who reported them (2)

Manuel Rigger
6
Jasper Andrew
1

Every bug on record (19)

One row per report, newest first, each linking to the report itself. Rejected reports are marked and are not part of any count above.

Reported Report Status Technique Reporter
2026-04-01 NoREC logical bug: unoptimized evaluation of REGEXP_SUBSTR in the WHERE clause produces inconsistent counts... open NOREC Jasper Andrew
2026-04-01 NoREC logical bug: unoptimized evaluation of REGEXP_REPLACE in the WHERE clause produces inconsistent count... closed duplicate NOREC Jasper Andrew
2024-04-11 OPTIMIZE TABLE t0 NOWAIT results in Got error -2 "Internal error < 0 (Not system error)" from storage engin... closed duplicate — Tan Ming Wei
2023-04-07 The phenomenon of inconsistent query results caused by null data values closed not a bug TLP Chenglin Tian
2019-11-18 NOT NULL and UNIQUE constraints cause SUM() to yield an incorrect result verified NOREC Manuel Rigger
2019-11-15 UNIQUE constraint causes a query with string comparison to omit a row in the result set fixed NOREC Manuel Rigger
2019-11-14 CREATE UNIQUE INDEX USING HASH malfunctions for engine=Aria table closed duplicate — Manuel Rigger
2019-11-14 CREATE TABLE with generated column and RLIKE results in segfault verified — Manuel Rigger
2019-11-11 Index causes incorrect result when comparing float-point number with INT verified NOREC Manuel Rigger
2019-11-11 Incorrect result for expression with the <=> operator and IS NULL verified NOREC Manuel Rigger
2019-11-11 GREATEST() and LEAST() malfunction for NULL verified NOREC Manuel Rigger
— https://jira.mariadb.org/browse/MDEV-33893 unknown — —
— https://jira.mariadb.org/browse/MDEV-32143 unknown — —
— https://jira.mariadb.org/browse/MDEV-32108 unknown — —
— https://jira.mariadb.org/browse/MDEV-32107 unknown — —
— https://jira.mariadb.org/browse/MDEV-32106 unknown — —
— https://jira.mariadb.org/browse/MDEV-32105 unknown — —
— https://jira.mariadb.org/browse/MDEV-32099 unknown — —
— https://jira.mariadb.org/browse/MDEV-32076 unknown — —

Every figure on this page is computed from _data/impact/. The attribution policy explains what has to be true for a bug to be counted.