[feature](join) support ASOF join#59591

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starocean999 wants to merge 28 commits intoapache:masterfrom

starocean999:asof_join

Commits on Feb 7, 2026

backup code

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backup code

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back up code

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backup code

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backup code

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backup code

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fix fe ut

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BE demo
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BE use better algorithm
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check MATCH_CONDITION must specify column from both table

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todo
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update code

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update

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rebase code

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BE fix join condition with expr
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add more case

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fix failed ut

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add more case

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BE fix right join
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fix fe join commute

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BE fix ASOF RIGHT OUTER JOIN to properly handle unmatched build rows and support MATCH_CONDITION commutation
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BE refactor ASOF JOIN to materialize MATCH_CONDITION expressions and fix NULL handling
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fix cases and simplify BE codes
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BE clear codes
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BE left join
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BE fix nullable test
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BE finished left and right join
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BE optimize right join
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