feat(spark): implement Spark `date_diff` function#19845

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Jefffrey merged 3 commits intoapache:mainfrom

cht42:spark-datediff

Jan 19, 2026

Commits on Jan 16, 2026

feat(spark): implement Spark `date_diff` function
cht42
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Commits on Jan 17, 2026

feat(spark): enhance `date_diff` function to support various input types including string and timestamp
cht42
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Commits on Jan 19, 2026

Merge branch 'main' into spark-datediff
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