yuxiqian opened a new pull request, #4397:
URL: https://github.com/apache/flink-cdc/pull/4397
This closes FLINK-39682.
The behavior of `TO_DATE` built-in function is silently changed after
FLINK-38888. Previously, `TO_DATE(timestamp)` is equivalent to
`TO_DATE(CAST(timestamp AS VARCHAR))` or `TO_DATE('2026-01-01 21:48:25')`,
results in `2026-01-01`.
However, after rewriting `TO_DATE` strictly checks if input matches
`yyyy-MM-dd` format, and returns `null` then.
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