planner: fix leading hint cannot take effect in UNION ALL statements (#50277)#50722
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ti-chi-bot[bot] merged 4 commits intopingcap:release-7.6from Jan 25, 2024
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hawkingrei
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qw4990
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This is an automated cherry-pick of #50277
What problem does this PR solve?
Issue Number: close #50067
Problem Summary:
What changed and how does it work?
the root cause is that the
PlanBuilder.tableHintInfowill be overwritten by push/pop in thebuildSelectCheck List
Tests
Side effects
Documentation
Release note
Please refer to Release Notes Language Style Guide to write a quality release note.