Skip to content
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

Jump to bottom

planner: update the fix-control doc #19520

Open
wants to merge 2 commits into
base: master
Choose a base branch
from
Open

planner: update the fix-control doc #19520

Changes from 1 commit
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
7f1d9fc
fixup
qw4990 Nov 28, 2024
a23c5ff
fixup
qw4990 Nov 29, 2024
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
6 changes: 6 additions & 0 deletions optimizer-fix-controls.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -71,6 +71,12 @@ SET SESSION tidb_opt_fix_control = '44262:ON,44389:ON';
- This variable sets the threshold for the optimizer's heuristic strategy to select access paths. If the estimated rows for an access path (such as `Index_A`) is much smaller than that of other access paths (default `1000` times), the optimizer skips the cost comparison and directly selects `Index_A`.
- `0` means to disable this heuristic strategy.

### [`45798`](https://github.com/pingcap/tidb/issues/45798) <span class="version-mark">New in v7.5.0</span>

- Default value: `ON`
- Possible values: `ON`, `OFF`
- This variable controls whether to allow the Plan Cache to cache plans accessing generated columns.

### [`47400`](https://github.com/pingcap/tidb/issues/47400) <span class="version-mark">New in v8.4.0</span>

- Default value: `ON`
Expand Down