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planner: estimate index row count using extended correlation stats - #20160
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What problem does this PR solve?
Forth TiDB PR for #18330
Parser PR: pingcap/parser#913, merged.
CREATE / DROP / RELOAD extended stats PR: #18880, merged.
Compute extended stats in ANALYZE: #19134, merged.
Dump / load / GC extended stats PR: #19260, merged.
Problem Summary:
Not a problem, this PR improves index row count estimation by using extended stats.
What is changed and how it works?
What's Changed:
Related changes
pingcap/docs/pingcap/docs-cn:Check List
Tests
Side effects
N/A
Release note