Re: strange type name in information_schema

I'll try that .

Thank you very much for your help.

Best Regards
Dan S

2011/5/21 Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>

> 2011/5/21 Dan S <strd911(at)gmail(dot)com>:
> >
> > Is there any examples of how to join the system tables to get the same
> > information as I was trying to get from the function ?
>
> you can try to run "psql" consolewoth parameter -E, then you can see
> all SQL to system tables
>
> [pavel(at)nemesis src]$ psql -E postgres
> psql (9.1beta1)
> Type "help" for help.
>
> postgres=# \dt
> ********* QUERY **********
> SELECT n.nspname as "Schema",
> c.relname as "Name",
> CASE c.relkind WHEN 'r' THEN 'table' WHEN 'v' THEN 'view' WHEN 'i'
> THEN 'index' WHEN 'S' THEN 'sequence' WHEN 's' THEN 'special' WHEN 'f'
> THEN 'foreign table' END as "Type",
> pg_catalog.pg_get_userbyid(c.relowner) as "Owner"
> FROM pg_catalog.pg_class c
> LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
> WHERE c.relkind IN ('r','')
> AND n.nspname <> 'pg_catalog'
> AND n.nspname <> 'information_schema'
> AND n.nspname !~ '^pg_toast'
> AND pg_catalog.pg_table_is_visible(c.oid)
> ORDER BY 1,2;
> **************************
>
> List of relations
> Schema | Name | Type | Owner
> --------+------+-------+-------
> public | foo | table | pavel
> public | tbl1 | table | pavel
> (2 rows)
>
> postgres=# \d foo
> ********* QUERY **********
> SELECT c.oid,
> n.nspname,
> c.relname
> FROM pg_catalog.pg_class c
> LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
> WHERE c.relname ~ '^(foo)$'
> AND pg_catalog.pg_table_is_visible(c.oid)
> ORDER BY 2, 3;
> **************************
>
> ********* QUERY **********
> SELECT c.relchecks, c.relkind, c.relhasindex, c.relhasrules,
> c.relhastriggers, c.relhasoids, '', c.reltablespace, CASE WHEN
> c.reloftype = 0 THEN '' ELSE
> c.reloftype::pg_catalog.regtype::pg_catalog.text END, c.relpersistence
> FROM pg_catalog.pg_class c
> LEFT JOIN pg_catalog.pg_class tc ON (c.reltoastrelid = tc.oid)
> WHERE c.oid = '16385'
>
> **************************
>
> ********* QUERY **********
> SELECT a.attname,
> pg_catalog.format_type(a.atttypid, a.atttypmod),
> (SELECT substring(pg_catalog.pg_get_expr(d.adbin, d.adrelid) for 128)
> FROM pg_catalog.pg_attrdef d
> WHERE d.adrelid = a.attrelid AND d.adnum = a.attnum AND a.atthasdef),
> a.attnotnull, a.attnum,
> (SELECT c.collname FROM pg_catalog.pg_collation c, pg_catalog.pg_type t
> WHERE c.oid = a.attcollation AND t.oid = a.atttypid AND
> a.attcollation <> t.typcollation) AS attcollation
> FROM pg_catalog.pg_attribute a
> WHERE a.attrelid = '16385' AND a.attnum > 0 AND NOT a.attisdropped
> ORDER BY a.attnum
> **************************
>
> ********* QUERY **********
> SELECT c.oid::pg_catalog.regclass FROM pg_catalog.pg_class c,
> pg_catalog.pg_inherits i WHERE c.oid=i.inhparent AND i.inhrelid =
> '16385' ORDER BY inhseqno
> **************************
>
> ********* QUERY **********
> SELECT c.oid::pg_catalog.regclass FROM pg_catalog.pg_class c,
> pg_catalog.pg_inherits i WHERE c.oid=i.inhrelid AND i.inhparent =
> '16385' ORDER BY c.oid::pg_catalog.regclass::pg_catalog.text;
> **************************
>
> Table "public.foo"
> Column | Type | Modifiers
> --------+------+-----------
> a | text |
>
> postgres=# \df
> ********* QUERY **********
> SELECT n.nspname as "Schema",
> p.proname as "Name",
> pg_catalog.pg_get_function_result(p.oid) as "Result data type",
> pg_catalog.pg_get_function_arguments(p.oid) as "Argument data types",
> CASE
> WHEN p.proisagg THEN 'agg'
> WHEN p.proiswindow THEN 'window'
> WHEN p.prorettype = 'pg_catalog.trigger'::pg_catalog.regtype THEN
> 'trigger'
> ELSE 'normal'
> END as "Type"
> FROM pg_catalog.pg_proc p
> LEFT JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace
> WHERE pg_catalog.pg_function_is_visible(p.oid)
> AND n.nspname <> 'pg_catalog'
> AND n.nspname <> 'information_schema'
> ORDER BY 1, 2, 4;
> **************************
>
> List of functions
> Schema | Name | Result data type | Argument data types | Type
> --------+---------------+------------------+---------------------+--------
> public | dynamic_query | TABLE(i integer) | i integer | normal
> public | foo | void | | normal
> (2 rows)
>
> Regards
>
> Pavel
>
>
> >
> > Best Regards
> > Dan S
> >
> > 2011/5/21 Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
> >>
> >> 2011/5/21 Dan S <strd911(at)gmail(dot)com>:
> >> > So is there always an underscore prepended to the type name of an
> array
> >> > ?
> >> > for example float[] would then be _float right ?
> >>
> >> usually yes - this is older method for marking some type as array. Now
> >> array types are described by typelem in pg_type table.
> >>
> >> Pavel
> >>
> >> >
> >> > Best Regards
> >> > Dan S
> >> >
> >> > 2011/5/21 Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
> >> >>
> >> >> Hello
> >> >>
> >> >> type "array of text" has name "_text"
> >> >>
> >> >> Regards
> >> >>
> >> >> Pavel Stehule
> >> >>
> >> >> 2011/5/21 Dan S <strd911(at)gmail(dot)com>:
> >> >> > Hi !
> >> >> >
> >> >> > I'm running "PostgreSQL 9.0.2, compiled by Visual C++ build 1500,
> >> >> > 32-bit".
> >> >> >
> >> >> > I'm trying to get type information on functions out of
> >> >> > information_schema.
> >> >> > When there is an array as input or output of a function I try to
> >> >> > query
> >> >> > information_schema of the array type.
> >> >> >
> >> >> > In this case udt_name gives the type name _text why does it not
> give
> >> >> > text ?
> >> >> >
> >> >> > Is this the right way to query the parameter types ?
> >> >> >
> >> >> > CREATE OR REPLACE FUNCTION test(ta text[]) RETURNS void AS $$
> >> >> > BEGIN
> >> >> > RETURN;
> >> >> > END;
> >> >> > $$ LANGUAGE plpgsql;
> >> >> >
> >> >> > select p.udt_name,p.data_type,*
> >> >> > from information_schema.routines r ,information_schema.parameters p
> >> >> > where r.routine_name = 'test'
> >> >> > and p.specific_name = r.specific_name
> >> >> > and p.specific_catalog=r.specific_catalog
> >> >> > and p.specific_schema=r.specific_schema
> >> >> >
> >> >> >
> >> >> > Best Regards
> >> >> > Dan S
> >> >> >
> >> >
> >> >
> >
> >
>