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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