[21] tell mysql to ignore the sort index for search queries #29322
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Signed-off-by: Robin Appelman <robin@icewind.nl>
mysql really likes to pick an index for sorting if it can't fully satisfy the where filter with an index, since search queries pretty much never are fully filtered by index mysql often picks an index for sorting instead of the *much* more useful index for filtering. To bypass this, we tell mysql explicitly not to use the mtime (the default order field) index, so it will instead pick an index that is actually useful. Signed-off-by: Robin Appelman <robin@icewind.nl>
icewind1991
changed the title
skjnldsv
approved these changes
Nov 4, 2021
miaulalala
approved these changes
Nov 4, 2021
skjnldsv
added
4. to release
|
the master PR and NC 22 PRs are not merged, revert ? ref #29300 |
|
/backport to stable21 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
nc21 version of #29300