[FLINK-39682] Fix unable to invoke TO_DATE with TIMESTAMP types#4397
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lvyanquan
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May 18, 2026
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This closes FLINK-39682.
The behavior of
TO_DATEbuilt-in function is silently changed after FLINK-38888. Previously,TO_DATE(timestamp)is equivalent toTO_DATE(CAST(timestamp AS VARCHAR))orTO_DATE('2026-01-01 21:48:25'), results in2026-01-01.However, after rewriting
TO_DATEstrictly checks if input matchesyyyy-MM-ddformat, and returnsnullthen.