SET default_regex_flags='';
SELECT @@default_regex_flags;
@@default_regex_flags

SET default_regex_flags=DEFAULT;
SELECT @@default_regex_flags;
@@default_regex_flags

SET default_regex_flags=NULL;
ERROR 42000: Variable 'default_regex_flags' can't be set to the value of 'NULL'
SELECT @@default_regex_flags;
@@default_regex_flags

SET default_regex_flags='UNKNOWN';
ERROR 42000: Variable 'default_regex_flags' can't be set to the value of 'UNKNOWN'
SET default_regex_flags=325;
ERROR 42000: Variable 'default_regex_flags' can't be set to the value of '325'
SET default_regex_flags=123.0;
ERROR 42000: Incorrect argument type to variable 'default_regex_flags'
SET default_regex_flags=123e0;
ERROR 42000: Incorrect argument type to variable 'default_regex_flags'
SET default_regex_flags='DOTALL';
SELECT @@default_regex_flags;
@@default_regex_flags
DOTALL
SET default_regex_flags=NULL;
ERROR 42000: Variable 'default_regex_flags' can't be set to the value of 'NULL'
SELECT @@default_regex_flags;
@@default_regex_flags
DOTALL
SET @@default_regex_flags=63;
SELECT @@default_regex_flags;
@@default_regex_flags
DOTALL,DUPNAMES,EXTENDED,EXTENDED_MORE,EXTRA,MULTILINE
SET @@default_regex_flags='DOTALL';
SELECT @@default_regex_flags;
@@default_regex_flags
DOTALL
SET @@default_regex_flags='DOTALL,DUPNAMES,EXTENDED,EXTRA,MULTILINE,UNGREEDY';
SELECT @@default_regex_flags;
@@default_regex_flags
DOTALL,DUPNAMES,EXTENDED,EXTRA,MULTILINE,UNGREEDY
SET @@default_regex_flags=DEFAULT;
SET @@global.default_regex_flags='MULTILINE';
SELECT @@session.default_regex_flags;
@@session.default_regex_flags

connect  con1,localhost,root,,;
connection con1;
SELECT @@session.default_regex_flags;
@@session.default_regex_flags
MULTILINE
connection default;
disconnect con1;
SELECT @@session.default_regex_flags;
@@session.default_regex_flags

SET @@global.default_regex_flags=DEFAULT;
SET default_regex_flags=DEFAULT;