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Re: \df

From: "Jie Liang" <jie(at)stbernard(dot)com>
To: "Stefan Weiss" <spaceman(at)foo(dot)at>, <pgsql-sql(at)postgresql(dot)org>
Subject: Re: \df
Date: 2004-05-07 23:47:40
Message-ID: E7E213858379814A9AE48CA6754F5ECB1E1F92@mail01.stbernard.com (view raw or flat)
Thread:
Lists: pgsql-sql
Thanks.

Jie Liang

-----Original Message-----
From: Stefan Weiss [mailto:spaceman(at)foo(dot)at] 
Sent: Friday, May 07, 2004 4:40 PM
To: pgsql-sql(at)postgresql(dot)org
Subject: Re: [SQL] \df


On Saturday, 08 May 2004 01:15, Jie Liang wrote:
> What sql statement equal to \df function_name
> I want to know the result data type for a given function within 
> plpgsql.


Try the -E switch for pgsql:


spaceman(at)weyoun:~ $ psql -E
Welcome to psql 7.4.2, the PostgreSQL interactive terminal.

Type:  \copyright for distribution terms
       \h for help with SQL commands
       \? for help on internal slash commands
       \g or terminate with semicolon to execute query
       \q to quit

spaceman=# \df alt_to_iso

********* QUERY **********
SELECT CASE WHEN p.proretset THEN 'setof ' ELSE '' END ||
  pg_catalog.format_type(p.prorettype, NULL) as "Result data type",
  n.nspname as "Schema",
  p.proname as "Name",
  pg_catalog.oidvectortypes(p.proargtypes) as "Argument data types" FROM
pg_catalog.pg_proc p
     LEFT JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace WHERE
p.prorettype <> 'pg_catalog.cstring'::pg_catalog.regtype
      AND p.proargtypes[0] <> 'pg_catalog.cstring'::pg_catalog.regtype
      AND NOT p.proisagg
      AND pg_catalog.pg_function_is_visible(p.oid)
      AND p.proname ~ '^alt_to_iso$'
ORDER BY 2, 3, 1, 4;
**************************

                         List of functions
 Result data type |   Schema   |    Name    |     Argument data types
------------------+------------+------------+---------------------------
------------------+------------+------------+------------------
 void             | pg_catalog | alt_to_iso | integer, integer, cstring,
... 
(1 row)


HTH,
stefan weiss

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Next:From: Gaetano MendolaDate: 2004-05-07 23:50:22
Subject: Re: CONTEXT on PL/pgSQL
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