Skip to content
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

planner: plan cache support subquery #12945

Merged
merged 3 commits into from
Mar 20, 2023
Merged

planner: plan cache support subquery #12945

Changes from 1 commit
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
d91f303
planner: plan cache support subquery
Oreoxmt Mar 16, 2023
6d5ac91
Apply suggestions from code review
Oreoxmt Mar 17, 2023
b8b3987
add tidb_enable_plan_cache_for_subquery
Oreoxmt Mar 17, 2023
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
8 changes: 8 additions & 0 deletions system-variables.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1735,6 +1735,14 @@ MPP is a distributed computing framework provided by the TiFlash engine, which a
- Default value: `ON`
- This variable controls whether Prepared Plan Cache caches execution plans with a variable as the `LIMIT` parameter (`LIMIT ?`). The default value is `ON`, which means Prepared Plan Cache supports caching such execution plans. Note that Prepared Plan Cache does not support caching execution plans with a variable that is greater than 10000.

### tidb_enable_plan_cache_for_subquery <span class="version-mark">New in v7.0.0</span>
Oreoxmt marked this conversation as resolved.
Show resolved Hide resolved

- Scope: SESSION | GLOBAL
- Persists to cluster: Yes
- Type: Boolean
- Default value: `ON`
- This variable controls whether Prepared Plan Cache caches queries that contain subqueries.

### tidb_enable_plan_replayer_capture

<CustomContent platform="tidb-cloud">
Expand Down