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Support for OUT parameters in procedures

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Unlike for functions, OUT parameters for procedures are part of the
signature.  Therefore, they have to be listed in pg_proc.proargtypes
as well as mentioned in ALTER PROCEDURE and DROP PROCEDURE.

Reviewed-by: Andrew Dunstan <andrew.dunstan@2ndquadrant.com>
Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/2b8490fe-51af-e671-c504-47359dc453c5@2ndquadrant.com
This commit is contained in:
Peter Eisentraut
2020-10-05 09:09:09 +02:00
parent e899742081
commit 2453ea1422
28 changed files with 416 additions and 93 deletions
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11
doc/src/sgml/ref/alter_extension.sgml
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@@ -212,11 +212,12 @@ ALTER EXTENSION <replaceable class="parameter">name</replaceable> DROP <replacea
argument: <literal>IN</literal>, <literal>OUT</literal>,
<literal>INOUT</literal>, or <literal>VARIADIC</literal>.
If omitted, the default is <literal>IN</literal>.
Note that <command>ALTER EXTENSION</command> does not actually pay
any attention to <literal>OUT</literal> arguments, since only the input
arguments are needed to determine the function's identity.
So it is sufficient to list the <literal>IN</literal>, <literal>INOUT</literal>,
and <literal>VARIADIC</literal> arguments.
Note that <command>ALTER EXTENSION</command> does not actually pay any
attention to <literal>OUT</literal> arguments for functions and
aggregates (but not procedures), since only the input arguments are
needed to determine the function's identity. So it is sufficient to
list the <literal>IN</literal>, <literal>INOUT</literal>, and
<literal>VARIADIC</literal> arguments for functions and aggregates.
</para>
</listitem>
</varlistentry>