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Implement SQL-spec RETURNS TABLE syntax for functions.

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(Unlike the original submission, this patch treats TABLE output parameters
as being entirely equivalent to OUT parameters -- tgl)

Pavel Stehule
This commit is contained in:
Tom Lane
2008-07-18 03:32:53 +00:00
parent a8fb90cf2d
commit 69a785b8bf
23 changed files with 626 additions and 85 deletions
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28
doc/src/sgml/func.sgml
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@@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.441 2008/07/16 00:48:53 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.442 2008/07/18 03:32:51 tgl Exp $ -->
<chapter id="functions">
<title>Functions and Operators</title>
@@ -11563,6 +11563,14 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
<primary>pg_get_ruledef</primary>
</indexterm>
<indexterm>
<primary>pg_get_function_arguments</primary>
</indexterm>
<indexterm>
<primary>pg_get_function_result</primary>
</indexterm>
<indexterm>
<primary>pg_get_indexdef</primary>
</indexterm>
@@ -11636,6 +11644,16 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
<entry>decompile internal form of an expression, assuming that any Vars
in it refer to the relation indicated by the second parameter</entry>
</row>
<row>
<entry><literal><function>pg_get_function_arguments</function>(<parameter>func_oid</parameter>)</literal></entry>
<entry><type>text</type></entry>
<entry>get argument list for function</entry>
</row>
<row>
<entry><literal><function>pg_get_function_result</function>(<parameter>func_oid</parameter>)</literal></entry>
<entry><type>text</type></entry>
<entry>get <literal>RETURNS</> clause for function</entry>
</row>
<row>
<entry><literal><function>pg_get_indexdef</function>(<parameter>index_oid</parameter>)</literal></entry>
<entry><type>text</type></entry>
@@ -11738,6 +11756,14 @@ SELECT pg_type_is_visible('myschema.widget'::regtype);
the same result as the variant that does not have the parameter at all.
</para>
<para>
<function>pg_get_function_arguments</function> returns the argument list
of a function, in the form it would need to appear in within
<command>CREATE FUNCTION</>.
<function>pg_get_function_result</function> similarly returns the
appropriate <literal>RETURNS</> clause for the function.
</para>
<para>
<function>pg_get_serial_sequence</function> returns the name of the
sequence associated with a column, or NULL if no sequence is associated