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add system variable back for tidb_enable_point_get_plan_cache. #20679

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Merged
merged 8 commits into from
Apr 8, 2025
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add system variable back for tidb_enable_point_get_plan_cache. #20679

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8 changes: 8 additions & 0 deletions system-variables.md
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Expand Up @@ -2578,6 +2578,14 @@ mysql> SELECT job_info FROM mysql.analyze_jobs ORDER BY end_time DESC LIMIT 1;

</CustomContent>

### tidb_enable_point_get_cache

- Scope: SESSION
- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): YES
- Type: Boolean
- Default value: `OFF`
- When you set the table lock type of [`LOCK TABLES`](/sql-statements/sql-statement-lock-tables-and-unlock-tables.md) to `READ`, setting this variable to `ON` enables caching of point query results, reducing the overhead of repeated queries and improving point query performance.

### tidb_enable_prepared_plan_cache <span class="version-mark">New in v6.1.0</span>

- Scope: SESSION | GLOBAL
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