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system-variable: the value of ‘tidb_service_scope’ becomes case-insensitive in v9.0.0 and v8.5.6 #22545

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Merged
ti-chi-bot merged 6 commits into from
Apr 10, 2026
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system-variable: the value of ‘tidb_service_scope’ becomes case-insensitive in v9.0.0 and v8.5.6 #22545

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Update system-variables.md
Frank945946 Mar 9, 2026
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hfxsd Mar 16, 2026
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hfxsd Apr 1, 2026
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Merge branch 'master' into patch-23
hfxsd Apr 10, 2026
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Merge remote-tracking branch 'upstream/master' into pr/22545
hfxsd Apr 10, 2026
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Update identify-slow-queries.md
hfxsd Apr 10, 2026
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2 changes: 1 addition & 1 deletion system-variables.md
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Expand Up @@ -5758,7 +5758,7 @@ SHOW WARNINGS;
- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): No
- Type: String
- Default value: ""
- Optional value: a string with a length of up to 64 characters. Valid characters include digits `0-9`, letters `a-zA-Z`, underscores `_`, and hyphens `-`.
- Optional value: a string with a length of up to 64 characters. Valid characters include digits `0-9`, letters `a-zA-Z`, underscores `_`, and hyphens `-`. Starting from v8.5.6 and v9.0.0, the value of this variable is case-insensitive. TiDB converts the input value to lowercase for storage and comparison.
- This variable is an instance-level system variable. You can use it to control the service scope of each TiDB node under the [TiDB Distributed eXecution Framework (DXF)](/tidb-distributed-execution-framework.md). The DXF determines which TiDB nodes can be scheduled to execute distributed tasks based on the value of this variable. For specific rules, see [Task scheduling](/tidb-distributed-execution-framework.md#task-scheduling).

### tidb_session_alias <span class="version-mark">New in v7.4.0</span>
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