rdear <rdear(at)dev(dot)internal> writes:
> I'm doing a check within a PL/PGSQL function using a regular expression
> and I get the error:
> ERROR: regcomp failed with error invalid character range
> This appears to be because of the underscore "_" character. The regex I
> want to use is ''[A-Za-z0-9_]'' but this doesn't work.
Seems to work for me:
regression=# select 'a' ~ '[A-Za-z0-9_]';
?column?
----------
t
(1 row)
regression=# select '_' ~ '[A-Za-z0-9_]';
?column?
----------
t
(1 row)
regression=# select ':' ~ '[A-Za-z0-9_]';
?column?
----------
f
(1 row)
How old is your Postgres? (I can tell by the spelling of the error
message that it's not current.)
regards, tom lane