-<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.353 2007/01/29 13:24:30 petere Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.354 2007/01/30 02:39:27 momjian Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
</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.)
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.246 2007/01/25 04:17:46 momjian Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.247 2007/01/30 02:39:27 momjian Exp $
*
*-------------------------------------------------------------------------
*/
* 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)