feat: Support Spark levenshtein expression in native execution#4105

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Myx778 wants to merge 15 commits into

apache:mainfrom

Myx778:feat/levenshtein-expression

Commits on Jun 1, 2026

feat: Support Spark levenshtein expression in native execution
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style: fix Spotless formatting violations in test code
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fix: address CI lint failures
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test: add SLT tests for levenshtein expression
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Add levenshtein to benchmark and update expressions.md

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Support three-argument levenshtein with threshold and add collation check

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Fix Spotless formatting in levenshtein threshold test

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Fix Spotless formatting in strings.scala and test suite

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Use scalarFunctionExprToProtoWithReturnType for levenshtein

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Fix Spark 3.4 compatibility: skip levenshtein threshold tests on Spark < 3.5

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Remove duplicate levenshtein benchmark entry

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Support threshold as column (not just literal) in levenshtein
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Fix unused import warning: move ScalarValue to test module
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Fix Spotless formatting in threshold column tests
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Run cargo fmt
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