statistics, planner: use the correct IndexInfo in GenerateHistCollFromColumnInfo() | tidb-test=pr/2219 (#44441)#46727
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ti-chi-bot[bot] merged 2 commits intopingcap:release-6.1from Sep 28, 2023
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Signed-off-by: Yang Keao <yangkeao@chunibyo.icu>
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IndexInfo in GenerateHistCollFromColumnInfo() | tidb-test=pr/2149 (#44441)IndexInfo in GenerateHistCollFromColumnInfo() | tidb-test=pr/2219 (#44441)
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hawkingrei
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Sep 28, 2023
winoros
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: hawkingrei, winoros The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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This is an automated cherry-pick of #44441
What problem does this PR solve?
Issue Number: close #44369
Problem Summary:
We saved the
IndexInfoin the stats cache, and use it in the query.But it may be outdated after DDL, which will cause some strange and unexpected result.
In this bug, we generated an incomplete
HistColl.Idx2ColumnIDs.The following estimation logic panicked when trying to get the needed column that was missing in it.
What is changed and how it works?
Use the
IndexInfofrom theDataSource.tableInfo.IndicesinGenerateHistCollFromColumnInfo.Check List
Tests
Side effects
Documentation
Release note
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