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stored as a variable
We don't fix the bug itself, we just make regex functions display errors
returned from pcre_exec() as MariaDB warnings.
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Added a new system variable:
default_regex_flags='DOTALL,DUPNAMES,EXTENDED,EXTRA,MULTILINE,UNGREEDY'
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Do not pass PCRE_UCP flag for binary data.
This makes bytes 0x80..FF not to belong to
generic character classes \d (digit) and \w (word character).
SELECT 0xFF RLIKE '\\w';
-> 0
Note, this change does not affect non-binary data,
which is still examined with the PCRE_UCP flag by default.
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Adding tests with 0x00 characters from
Bug#70470 REGEXP fails to find matches after NUL character
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Adding more tests for case sensitivity,
with various collation and (?i) flags combinations.
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