Skip to content

Update the default value of tidb_enable_column_tracking #20433

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

Draft
wants to merge 2 commits into
base: master
Choose a base branch
from
+2 −2
Draft

Update the default value of tidb_enable_column_tracking #20433

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
bceaf64
Update system-variables.md
lilin90 Mar 3, 2025
9eaff78
Update system-variables.md
lilin90 Mar 3, 2025
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
4 changes: 2 additions & 2 deletions system-variables.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2010,13 +2010,13 @@ mysql> SELECT job_info FROM mysql.analyze_jobs ORDER BY end_time DESC LIMIT 1;

> **Warning:**
>
> Starting from v8.3.0, this variable is deprecated. TiDB tracks predicate columns by default. For more information, see [`tidb_analyze_column_options`](#tidb_analyze_column_options-new-in-v830).
> Starting from v8.3.0, this variable is deprecated. TiDB tracks predicate columns **by default**, and the behavior is not affected by the value of this variable. For more information, see [`tidb_analyze_column_options`](#tidb_analyze_column_options-new-in-v830).

- Scope: GLOBAL
- Persists to cluster: Yes
- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): No
- Type: Boolean
- Default value: `OFF`
- Default value: `ON`. Before v8.x.0, the default value is `OFF`.
Copy link
Member Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

@winoros Please check and confirm this change starts from which version. Thanks!

- This variable controls whether to enable TiDB to collect `PREDICATE COLUMNS`. After enabling the collection, if you disable it, the information of previously collected `PREDICATE COLUMNS` is cleared. For details, see [Collect statistics on some columns](/statistics.md#collect-statistics-on-some-columns).

### tidb_enable_enhanced_security
Expand Down
Loading