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system variables: change default value for var tidb_enable_inl_join_inner_multi_pattern #19008

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system variables: change default value for var tidb_enable_inl_join_inner_multi_pattern #19008

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system variables: change default value for var `tidb_enable_inl_join_…
winoros Sep 26, 2024
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Oreoxmt Sep 29, 2024
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6 changes: 4 additions & 2 deletions system-variables.md
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Expand Up @@ -2421,8 +2421,10 @@ mysql> SELECT job_info FROM mysql.analyze_jobs ORDER BY end_time DESC LIMIT 1;
- Persists to cluster: Yes
- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): Yes
- Type: Boolean
- Default value: `OFF`
- This variable controls whether Index Join is supported when the inner table has `Selection` or `Projection` operators on it. The default value `OFF` means that Index Join is not supported in this scenario.
- Default value: `ON`
- This variable controls whether Index Join is supported when the inner table has `Selection`, `Aggregation`, or `Projection` operators on it. The default value `OFF` means that Index Join is not supported in this scenario.
- The default value of this variable changes from `OFF` to `ON` starting from v8.4.0.
- If your cluster is upgraded from an earlier version smaller than v7.0.0, the default value of `tidb_enable_inl_join_inner_multi_pattern` will be `OFF`.

### tidb_enable_ordered_result_mode

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