"Andrew McNamara" <andrewm@object-craft.com.au> writes:
> I'm trying to use PQexecParams to do an "IN" query, where the set of
> values is supplied as a single parameter - essentially:
>
> SELECT * FROM sometable WHERE colvalue IN $1
>
> With $1 as a set or array of some sort. Unfortunately, the above doesn't
> pass parsing. Is there any way to do an IN query via PQexecParams that
> doesn't involve enumerating the set of values as individual parameters?
No but there is a way to do something equivalent with arrays:
SELECT * FROM sometable WHERE colvalue = any($1::integer[]);
I'm not sure which (if any) drivers have good support for arrays though. I
think with most if not all drivers you'll have to crunch your list of elements
down into a string argument of the form "{1,2,3}" (without the quotes).
If you're using something more complex than integers then you'll have to deal
with quoting the array elements which will start to get annoying.
-- Gregory Stark EnterpriseDB http://www.enterprisedb.com
