Re: pg_proc and pg_type

snpe wrote:
> Hello,
> I have column proargtypes (oidvector) in pg_proc and oid in pg_type
> Can I join tables pg_proc and pg_type and get row for every argument of
> functions

oidvector is a fixed-width array. However, you can access individual
elements, at least in the 7.3 beta I use:

select proargtypes[0] from pg_proc;
proargtypes
-------------
23
23

In <7.3 the length is fixed at 16, while in >=7.3 the length is 32.

You can then join that to pg_type:

test=> select typname from pg_proc, pg_type
test-> where proargtypes[0] = pg_type.oid;
typname
-------------
int4
int4
int4
int4

Hope that helps.

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