Implement `reverse` performance optimization#4056

Closed

selsong wants to merge 17 commits intoopensearch-project:mainfrom

selsong:reverse_pushdown

Commits on Sep 8, 2025

WIP: sort flip collation
Selina Song
committed
Sort collation implemented, added ExplainIT
Selina Song
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spotless
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Add sort double reverse no op test
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update logical plan tests
Selina Song
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add opt rule for sort flip
Selina Song
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restore planutils after merge
Selina Song
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fix conflict with aggregate opt rule
Selina Song
committed

Commits on Sep 9, 2025

add no pushdown IT
Selina Song
committed
spotless format
Selina Song
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Address code review: extend hasSameField to compare all fields and simplify null direction handling
Selina Song
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add UT sparkSQL
Selina Song
committed

Commits on Sep 10, 2025

rename opt rule, cleanup explain UT
Selina Song
committed

Commits on Sep 11, 2025

remove Opt Rule, keep collation
Selina Song
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Merge branch 'main' into reverse_pushdown
selsong
authored

Commits on Sep 12, 2025

Add full reverse fallback log plan
Selina Song
committed
fix ExplainIT
Selina Song
committed