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Clarify paramater handling for pg_get_serial_sequence().

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This commit is contained in:
Bruce Momjian 2007-01-30 02:32:05 +00:00
parent 01d9754bd9
commit c22f642f2f
2 changed files with 16 additions and 8 deletions
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20
doc/src/sgml/func.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.347.2.1 2007/01/12 23:35:03 tgl Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.347.2.2 2007/01/30 02:32:04 momjian Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
@ -9882,12 +9882,18 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
</para>
<para>
<function>pg_get_serial_sequence</function> fetches the name of the
sequence associated with a column, or NULL if there is no sequence
associated with the column. The result is suitably formatted for passing
to the sequence functions (see <xref linkend="functions-sequence">).
This association can be modified or removed with <command>ALTER SEQUENCE
OWNED BY</>. (The function probably should have been called
<function>pg_get_serial_sequence</function> returns the name of the
sequence associated with a column, or NULL if no sequence is associated
with the column. The first input parameter is a table name with
optional schema, and the second parameter is a column name. Because
the first parameter is potentially a schema and table, it is not treated
as a double-quoted identifier, meaning it is lowercased by default,
while the second parameter, being just a column name, is treated as
double-quoted and has its case preserved. The function returns a value
suitably formatted for passing to the sequence functions (see <xref
linkend="functions-sequence">). This association can be modified or
removed with <command>ALTER SEQUENCE OWNED BY</>. (The function
probably should have been called
<function>pg_get_owned_sequence</function>; its name reflects the fact
that it's typically used with <type>serial</> or <type>bigserial</>
columns.)

4
src/backend/utils/adt/ruleutils.c
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@ -2,7 +2,7 @@
* ruleutils.c - Functions to convert stored expressions/querytrees
* back to source text
*
* $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.235.2.1 2007/01/25 04:17:56 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.235.2.2 2007/01/30 02:32:05 momjian Exp $
**********************************************************************/
#include "postgres.h"
@ -1232,6 +1232,8 @@ pg_get_userbyid(PG_FUNCTION_ARGS)
* pg_get_serial_sequence
* Get the name of the sequence used by a serial column,
* formatted suitably for passing to setval, nextval or currval.
* First parameter is not treated as double-quoted, second parameter
* is --- see documentation for reason.
*/
Datum
pg_get_serial_sequence(PG_FUNCTION_ARGS)