planner: fix panic of merge join for tables with redundant indexes (#15840) #15919
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cherry-pick #15840 to release-3.0
What problem does this PR solve?
Issue Number: close #15813
Problem Summary:
MergeJoin for tables with redundant index would panic.
What is changed and how it works?
Proposal: xxx
What's Changed:
Use length of de-duplicated conditions instead of original length for declaring slice in
moveEqualToOtherConditions.How it Works:
Avoid the capacity of slice to be out of bound.
Related changes
Check List
Tests
Side effects
N/A
Release note