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planner: fix wrong behavior for = all() (#52801) #53256
planner: fix wrong behavior for = all() (#52801) #53256
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Signed-off-by: ti-chi-bot <ti-community-prow-bot@tidb.io>
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Signed-off-by: Weizhen Wang <wangweizhen@pingcap.com>
Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## release-7.1 #53256 +/- ##
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Coverage ? 73.4616%
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Files ? 1211
Lines ? 380423
Branches ? 0
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Hits ? 279465
Misses ? 83117
Partials ? 17841 |
[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: hawkingrei, qw4990 The full list of commands accepted by this bot can be found here. The pull request process is described here
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[LGTM Timeline notifier]Timeline:
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This is an automated cherry-pick of #52801
What problem does this PR solve?
Issue Number: close #52755
Problem Summary:
What changed and how does it work?
Use
max
function instead offirst_row
function.if the query is
t.id = all (select s.id from s)
, it will be rewrote tot.id = (select s.id from s having count(distinct s.id) <= 1 and [all checker])
.If there is NULL in the
s.id
column, s.id should be the value that isn't null in condition t.id == s.id. So use function max to filter NULL.Check List
Tests
Side effects
Documentation
Release note
Please refer to Release Notes Language Style Guide to write a quality release note.