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.

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
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I have join pg_type and pg_proc and get view arguments and return value
(btw for getProcedureColumns in JDBC)
This is not enough.I have join all rows from pg_type, which have any from
pg_proc.oidvector (I must know length from oidvector array)
That is fine operator which is true if oid in any oid from oidvector, else
false and that be simple pg_proc.oidvector=pg_proc.oid
I don't know how any function or operator add in core postgresql (procedure
for this), but I need this operator and function for size,scale and precision
for any type (special for varchar,char,numeric etc. - this is like
format_type function, but special function for size, scale and precision).
regards
Haris Peco