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branch-4.0: [Fix](cast) Fix wrong corner case of datetime conversion about timezone convert #57422 - #57442
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…ne convert (#57422) before: ```sql mysql> select cast('9999-12-31 23:59:59.999999 +00:00' as datetime(6)); +----------------------------------------------------------+ | cast('9999-12-31 23:59:59.999999 +00:00' as datetime(6)) | +----------------------------------------------------------+ | | +----------------------------------------------------------+ ``` now: ```sql mysql> select cast('9999-12-31 23:59:59.999999 +00:00' as datetime(6)); +----------------------------------------------------------+ | cast('9999-12-31 23:59:59.999999 +00:00' as datetime(6)) | +----------------------------------------------------------+ | NULL | +----------------------------------------------------------+ ```
yiguolei
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Oct 29, 2025
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Oct 30, 2025
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Cherry-picked from #57422