[MDEV-38168] Lots of joins can crash the server - Jira

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Type: Bug
Status: Closed (View Workflow)
Priority: Blocker
Resolution: Fixed
Affects Version/s: 10.6, 10.11, 11.4, 11.8
Fix Version/s: 10.11.16, 11.4.10, 11.8.6, 12.2.2
Component/s: Parser
Labels:

Bug Category:
Can result in hang or crash
Release Note Summary:
A large number of joins in a SELECT can crash the server
Sprint:
Q1/2026 Server Maintenance

Description

Queries like

SELECT * FROM t1 JOIN t1 x0 ON t1

                 JOIN t1 x1 ON t1

                 JOIN t1 x2 ON t1

...

                 JOIN t1 x14000 ON t1

might get out of stack when recursively invoking JOIN::free_pushdown_handlers().

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stack-size-usage-checker.diff
2 kB
2025-12-14 12:39

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Assignee:: Sergei Golubchik

Reporter:: Sergei Golubchik

Votes:: 0 Vote for this issue

Watchers:: 4 Start watching this issue

Dates

Created:: 2025-11-24 14:14

Updated:: 2026-04-30 07:35

Resolved:: 2026-01-14 20:54

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