Tom Lane
parent
06c22d7f51
commit
b8fab2411d
|
|
@ -1,4 +1,4 @@
|
|||
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.451 2008/10/27 09:37:46 petere Exp $ -->
|
||||
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.452 2008/11/03 17:51:12 tgl Exp $ -->
|
||||
|
||||
<chapter id="functions">
|
||||
<title>Functions and Operators</title>
|
||||
|
|
@ -11643,6 +11643,10 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
|
|||
<primary>pg_tablespace_databases</primary>
|
||||
</indexterm>
|
||||
|
||||
<indexterm>
|
||||
<primary>pg_typeof</primary>
|
||||
</indexterm>
|
||||
|
||||
<para>
|
||||
<xref linkend="functions-info-catalog-table"> lists functions that
|
||||
extract information from the system catalogs.
|
||||
|
|
@ -11766,6 +11770,11 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
|
|||
<entry><type>setof oid</type></entry>
|
||||
<entry>get the set of database OIDs that have objects in the tablespace</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal><function>pg_typeof</function>(<parameter>any</parameter>)</literal></entry>
|
||||
<entry><type>regtype</type></entry>
|
||||
<entry>get the data type of any value</entry>
|
||||
</row>
|
||||
</tbody>
|
||||
</tgroup>
|
||||
</table>
|
||||
|
|
@ -11848,6 +11857,12 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
|
|||
<structname>pg_class</> catalogs.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
<function>pg_typeof</function> returns the OID of the data type of the
|
||||
value that is passed to it. This can be helpful for troubleshooting or
|
||||
dynamically constructing SQL queries.
|
||||
</para>
|
||||
|
||||
<indexterm>
|
||||
<primary>col_description</primary>
|
||||
</indexterm>
|
||||
|
|
|
|||
|
|
@ -8,7 +8,7 @@
|
|||
*
|
||||
*
|
||||
* IDENTIFICATION
|
||||
* $PostgreSQL: pgsql/src/backend/utils/adt/misc.c,v 1.64 2008/10/05 17:33:16 petere Exp $
|
||||
* $PostgreSQL: pgsql/src/backend/utils/adt/misc.c,v 1.65 2008/11/03 17:51:13 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -371,3 +371,13 @@ pg_get_keywords(PG_FUNCTION_ARGS)
|
|||
|
||||
SRF_RETURN_DONE(funcctx);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Return the type of the argument.
|
||||
*/
|
||||
Datum
|
||||
pg_typeof(PG_FUNCTION_ARGS)
|
||||
{
|
||||
PG_RETURN_OID(get_fn_expr_argtype(fcinfo->flinfo, 0));
|
||||
}
|
||||
|
|
|
|||
|
|
@ -37,7 +37,7 @@
|
|||
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.500 2008/10/31 08:39:22 heikki Exp $
|
||||
* $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.501 2008/11/03 17:51:13 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -53,6 +53,6 @@
|
|||
*/
|
||||
|
||||
/* yyyymmddN */
|
||||
#define CATALOG_VERSION_NO 200810311
|
||||
#define CATALOG_VERSION_NO 200811031
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.520 2008/10/14 17:12:33 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.521 2008/11/03 17:51:13 tgl Exp $
|
||||
*
|
||||
* NOTES
|
||||
* The script catalog/genbki.sh reads this file and generates .bki
|
||||
|
|
@ -2289,7 +2289,8 @@ DESCR("result type of a function");
|
|||
|
||||
DATA(insert OID = 1686 ( pg_get_keywords PGNSP PGUID 12 10 400 0 f f t t s 0 2249 "" "{25,18,25}" "{o,o,o}" "{word,catcode,catdesc}" pg_get_keywords _null_ _null_ _null_ ));
|
||||
DESCR("list of SQL keywords");
|
||||
|
||||
DATA(insert OID = 1619 ( pg_typeof PGNSP PGUID 12 1 0 0 f f f f i 1 2206 "2276" _null_ _null_ _null_ pg_typeof _null_ _null_ _null_ ));
|
||||
DESCR("returns the type of the argument");
|
||||
|
||||
/* Generic referential integrity constraint triggers */
|
||||
DATA(insert OID = 1644 ( RI_FKey_check_ins PGNSP PGUID 12 1 0 0 f f t f v 0 2279 "" _null_ _null_ _null_ RI_FKey_check_ins _null_ _null_ _null_ ));
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
|
||||
* Portions Copyright (c) 1994, Regents of the University of California
|
||||
*
|
||||
* $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.324 2008/10/13 16:25:20 tgl Exp $
|
||||
* $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.325 2008/11/03 17:51:13 tgl Exp $
|
||||
*
|
||||
*-------------------------------------------------------------------------
|
||||
*/
|
||||
|
|
@ -404,6 +404,7 @@ extern Datum pg_tablespace_databases(PG_FUNCTION_ARGS);
|
|||
extern Datum pg_rotate_logfile(PG_FUNCTION_ARGS);
|
||||
extern Datum pg_sleep(PG_FUNCTION_ARGS);
|
||||
extern Datum pg_get_keywords(PG_FUNCTION_ARGS);
|
||||
extern Datum pg_typeof(PG_FUNCTION_ARGS);
|
||||
|
||||
/* oid.c */
|
||||
extern Datum oidin(PG_FUNCTION_ARGS);
|
||||
|
|
|
|||
|
|
@ -721,3 +721,58 @@ LINE 1: select formarray(1, variadic array['x'::text]);
|
|||
^
|
||||
HINT: No function matches the given name and argument types. You might need to add explicit type casts.
|
||||
drop function formarray(anyelement, variadic anyarray);
|
||||
-- test pg_typeof() function
|
||||
select pg_typeof(null); -- unknown
|
||||
pg_typeof
|
||||
-----------
|
||||
unknown
|
||||
(1 row)
|
||||
|
||||
select pg_typeof(0); -- integer
|
||||
pg_typeof
|
||||
-----------
|
||||
integer
|
||||
(1 row)
|
||||
|
||||
select pg_typeof(0.0); -- numeric
|
||||
pg_typeof
|
||||
-----------
|
||||
numeric
|
||||
(1 row)
|
||||
|
||||
select pg_typeof(1+1 = 2); -- boolean
|
||||
pg_typeof
|
||||
-----------
|
||||
boolean
|
||||
(1 row)
|
||||
|
||||
select pg_typeof('x'); -- unknown
|
||||
pg_typeof
|
||||
-----------
|
||||
unknown
|
||||
(1 row)
|
||||
|
||||
select pg_typeof('' || ''); -- text
|
||||
pg_typeof
|
||||
-----------
|
||||
text
|
||||
(1 row)
|
||||
|
||||
select pg_typeof(pg_typeof(0)); -- regtype
|
||||
pg_typeof
|
||||
-----------
|
||||
regtype
|
||||
(1 row)
|
||||
|
||||
select pg_typeof(array[1.2,55.5]); -- numeric[]
|
||||
pg_typeof
|
||||
-----------
|
||||
numeric[]
|
||||
(1 row)
|
||||
|
||||
select pg_typeof(myleast(10, 1, 20, 33)); -- polymorphic input
|
||||
pg_typeof
|
||||
-----------
|
||||
integer
|
||||
(1 row)
|
||||
|
||||
|
|
|
|||
|
|
@ -469,3 +469,14 @@ select formarray(1, 'x'::text); -- fail, type mismatch
|
|||
select formarray(1, variadic array['x'::text]); -- fail, type mismatch
|
||||
|
||||
drop function formarray(anyelement, variadic anyarray);
|
||||
|
||||
-- test pg_typeof() function
|
||||
select pg_typeof(null); -- unknown
|
||||
select pg_typeof(0); -- integer
|
||||
select pg_typeof(0.0); -- numeric
|
||||
select pg_typeof(1+1 = 2); -- boolean
|
||||
select pg_typeof('x'); -- unknown
|
||||
select pg_typeof('' || ''); -- text
|
||||
select pg_typeof(pg_typeof(0)); -- regtype
|
||||
select pg_typeof(array[1.2,55.5]); -- numeric[]
|
||||
select pg_typeof(myleast(10, 1, 20, 33)); -- polymorphic input
|
||||
|
|
|
|||
Loading…
Reference in New Issue