MDEV-38791: Disallow duplicate weekday formats in TO_DATE#4810
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alexDiaconuAlex wants to merge 1 commit intoMariaDB:12.3from
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MDEV-38791: Disallow duplicate weekday formats in TO_DATE#4810alexDiaconuAlex wants to merge 1 commit intoMariaDB:12.3from
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Reported-by: Elena Stepanova <elenastepanova@github> Signed-off-by: Alexandru Diaconu <alexandrudiaconu93@gmail.com>
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Problem
When using
TO_DATEwithsql_mode='ORACLE', providing duplicate weekday format specifiers (such as'DAY DY') did not throw an error during the format string parsing phase.Solution
Added duplicate format checks for weekday specifiers in
parse_format_string()(insidesql/item_timefunc.cc).Now, inputs like
SELECT TO_DATE('Monday Mon', 'DAY DY') FROM DUAL;correctly fail early and returnERROR 3047 (HY000): Invalid argument error: date format not recognized at DY in function to_date.Reported-by: Elena Stepanova elenastepanova@github