From b7dd7d978d99d042dbbfcfb890010735ad3e3e3f Mon Sep 17 00:00:00 2001
From: Frank945946 <108602632+Frank945946@users.noreply.github.com>
Date: Mon, 9 Mar 2026 15:34:00 +0800
Subject: [PATCH 1/2] Update system-variables.md
---
system-variables.md | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/system-variables.md b/system-variables.md
index 79af0db79a694..e9b5002f3c595 100644
--- a/system-variables.md
+++ b/system-variables.md
@@ -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 `-`. Sinc v8.5.6, the value of this variable is case-insensitive. The system 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 New in v7.4.0
From e34f94a3a2aae96d2d8d14083d36e33c0b471699 Mon Sep 17 00:00:00 2001
From: xixirangrang
Date: Mon, 16 Mar 2026 16:31:16 +0800
Subject: [PATCH 2/2] Update system-variables.md
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
---
system-variables.md | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/system-variables.md b/system-variables.md
index e9b5002f3c595..a3c7ebafacbd7 100644
--- a/system-variables.md
+++ b/system-variables.md
@@ -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 `-`. Sinc v8.5.6, the value of this variable is case-insensitive. The system converts the input value to lowercase for storage and comparison.
+- 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 New in v7.4.0