On Jul 3, 2008, at 09:53, Alvaro Herrera wrote:
>> Thanks. What would citext_hash() look like? I don't see a
>> text_hash() to
>> borrow from anywhere in src/.
>
> See hash_any(). I assume the difficulty is making sure that
> hash("FOO") = hash("foo") ...
Great, big help, thank you. So does this look sensible?
Datum
citext_hash(PG_FUNCTION_ARGS)
{ char *txt; char *str; Datum result;
txt = cilower( PG_GETARG_TEXT_PP(0) ); str = VARDATA_ANY(txt);
result = hash_any((unsigned char *) str, VARSIZE_ANY_EXHDR(txt));
/* Avoid leaking memory for toasted inputs */ PG_FREE_IF_COPY(txt, 0); pfree( str );
return result;
}
And how might I be able to test that it actually works?
Best,
David
