[branch-2.1](function) fix wrong result when convert_tz is out of bound (#37358) #38313
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…che#37358) ## Proposed changes Issue Number: close #xxx before: ```sql mysql> select CONVERT_TZ(cast('0000-01-01 00:00:00.00001' as DATETIMEV1), cast('Asia/Shanghai' as VARCHAR(65533)), cast('America/Los_Angeles' as VARCHAR(65533))); +---------------------------------------------------------------------------------------------------------------------------------------------------+ | convert_tz(cast('0000-01-01 00:00:00.00001' as DATETIME), cast('Asia/Shanghai' as VARCHAR(65533)), cast('America/Los_Angeles' as VARCHAR(65533))) | +---------------------------------------------------------------------------------------------------------------------------------------------------+ | q535-12-31 08:01:19 | +---------------------------------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.12 sec) ``` now: ```sql mysql> select CONVERT_TZ(cast('0000-01-01 00:00:00.00001' as DATETIMEV1), cast('Asia/Shanghai' as VARCHAR(65533)), cast('America/Los_Angeles' as VARCHAR(65533))); +---------------------------------------------------------------------------------------------------------------------------------------------------+ | convert_tz(cast('0000-01-01 00:00:00.00001' as DATETIME), cast('Asia/Shanghai' as VARCHAR(65533)), cast('America/Los_Angeles' as VARCHAR(65533))) | +---------------------------------------------------------------------------------------------------------------------------------------------------+ | NULL | +---------------------------------------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.09 sec) ```
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Proposed changes
pick #37358
before:
now: