Skip to content

planner: update the default value of tidb_ignore_inlist_plan_digest to True #22516

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
qw4990 wants to merge 2 commits into
base: master
Choose a base branch
from
Open

planner: update the default value of tidb_ignore_inlist_plan_digest to True #22516

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
8d53a8c
fixup
qw4990 Mar 2, 2026
80164e1
Update system-variables.md
hfxsd Mar 3, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
6 changes: 3 additions & 3 deletions system-variables.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -3503,11 +3503,11 @@ For a system upgraded to v5.0 from an earlier version, if you have not modified
- Persists to cluster: Yes
- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): No
- Type: Boolean
- Default value: `OFF`
- Default value: `ON`
- This variable controls whether TiDB ignores the element differences in the `IN` list across different queries when generating Plan Digests.

- When it is the default value `OFF`, TiDB does not ignore the element differences (including the difference in the number of elements) in the `IN` list when generating Plan Digests. The element differences in the `IN` list result in different Plan Digests.
- When it is set to `ON`, TiDB ignores the element differences (including the difference in the number of elements) in the `IN` list and uses `...` to replace elements in the `IN` list in Plan Digests. In this case, TiDB generates the same Plan Digests for `IN` queries of the same type.
- When it is the default value `ON`, TiDB ignores the element differences (including the difference in the number of elements) in the `IN` list and uses `...` to replace elements in the `IN` list in Plan Digests. In this case, TiDB generates the same Plan Digests for `IN` queries of the same type.
- When it is set to `OFF`, TiDB does not ignore the element differences (including the difference in the number of elements) in the `IN` list when generating Plan Digests. The element differences in the `IN` list result in different Plan Digests.

### tidb_index_join_batch_size

Expand Down