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.

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

release-22.2.0: opt: fix WithScan errors in apply-joins #89856

Merged
merged 1 commit into from
Oct 13, 2022

Conversation

blathers-crl[bot]
Copy link

@blathers-crl blathers-crl bot commented Oct 12, 2022

Backport 1/1 commits from #89830 on behalf of @mgartner.

/cc @cockroachdb/release


In #88396, we updated the planning logic for the RHS of apply-joins so that all With expressions in the original memo's metadata are added to the metadata of the new, temporary memo. This change was brittle. It relied on the memo's curWithID to enumerate all With expressions in the metadata, but it did not propagate the same curWithID to the new temporary memo. This caused internal errors with nested apply-joins, because the With expression would not propagate to the inner-most memo's metadata.

This commit fixes the issue by removing the dependence on curWithID, and directly iterating over all With expressions to add them to the new metadata for the RHS of apply-joins.

Fixes #89601

Release note (bug fix): A bug has been fixed that caused internal errors in rare cases when running CTEs (statements with WITH clauses). This bug is only present in v22.2.0-beta.2, v22.2.0-beta.3, v21.2.16, and v22.1.9.


Release justification: Fixes recent regression in apply-join planning.

In #88396, we updated the planning logic for the RHS of apply-joins so
that all With expressions in the original memo's metadata are added to the
metadata of the new, temporary memo. This change was brittle. It relied
on the memo's `curWithID` to enumerate all With expressions in the
metadata, but it did not propagate the same `curWithID` to the new
temporary memo. This caused internal errors with nested apply-joins,
because the With expression would not propagate to the inner-most memo's
metadata.

This commit fixes the issue by removing the dependence on `curWithID`,
and directly iterating over all With expressions to add them to the new
metadata for the RHS of apply-joins.

Fixes #89601

Release note (bug fix): A bug has been fixed that caused internal errors
in rare cases when running CTEs (statements with WITH clauses). This bug
is only present in v22.2.0-beta.2, v22.2.0-beta.3, v21.2.16, and
v22.1.9.
@blathers-crl blathers-crl bot requested a review from a team as a code owner October 12, 2022 19:51
@blathers-crl blathers-crl bot force-pushed the blathers/backport-release-22.2.0-89830 branch from feeaa45 to a95204a Compare October 12, 2022 19:51
@blathers-crl blathers-crl bot requested review from michae2 and msirek October 12, 2022 19:51
@blathers-crl
Copy link
Author

blathers-crl bot commented Oct 12, 2022

Thanks for opening a backport.

Please check the backport criteria before merging:

  • Patches should only be created for serious issues or test-only changes.
  • Patches should not break backwards-compatibility.
  • Patches should change as little code as possible.
  • Patches should not change on-disk formats or node communication protocols.
  • Patches should not add new functionality.
  • Patches must not add, edit, or otherwise modify cluster versions; or add version gates.
If some of the basic criteria cannot be satisfied, ensure that the exceptional criteria are satisfied within.
  • There is a high priority need for the functionality that cannot wait until the next release and is difficult to address in another way.
  • The new functionality is additive-only and only runs for clusters which have specifically “opted in” to it (e.g. by a cluster setting).
  • New code is protected by a conditional check that is trivial to verify and ensures that it only runs for opt-in clusters.
  • The PM and TL on the team that owns the changed code have signed off that the change obeys the above rules.

Add a brief release justification to the body of your PR to justify this backport.

Some other things to consider:

  • What did we do to ensure that a user that doesn’t know & care about this backport, has no idea that it happened?
  • Will this work in a cluster of mixed patch versions? Did we test that?
  • If a user upgrades a patch version, uses this feature, and then downgrades, what happens?

@blathers-crl blathers-crl bot added blathers-backport This is a backport that Blathers created automatically. O-robot Originated from a bot. labels Oct 12, 2022
@cockroach-teamcity
Copy link
Member

This change is Reviewable

Copy link
Collaborator

@DrewKimball DrewKimball left a comment

Choose a reason for hiding this comment

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

:lgtm:

Reviewable status: :shipit: complete! 1 of 0 LGTMs obtained (waiting on @michae2 and @msirek)

Copy link
Contributor

@msirek msirek left a comment

Choose a reason for hiding this comment

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

:lgtm:

Reviewed 4 of 4 files at r1, all commit messages.
Reviewable status: :shipit: complete! 2 of 0 LGTMs obtained (waiting on @michae2)

Copy link
Collaborator

@rytaft rytaft left a comment

Choose a reason for hiding this comment

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

:lgtm:

Reviewed 4 of 4 files at r1, all commit messages.
Reviewable status: :shipit: complete! 3 of 0 LGTMs obtained (waiting on @michae2)

@mgartner mgartner merged commit 89717ee into release-22.2.0 Oct 13, 2022
@mgartner mgartner deleted the blathers/backport-release-22.2.0-89830 branch October 13, 2022 19:27
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
blathers-backport This is a backport that Blathers created automatically. O-robot Originated from a bot.
Projects
None yet
Development

Successfully merging this pull request may close these issues.

None yet

5 participants