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Add a bunch of pseudo-types to replace the behavior formerly associated

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with OPAQUE, as per recent pghackers discussion.  I still want to do some
more work on the 'cstring' pseudo-type, but I'm going to commit the bulk
of the changes now before the tree starts shifting under me ...
This commit is contained in:
Tom Lane
2002-08-22 00:01:51 +00:00
parent 606c9b9d4f
commit b663f3443b
126 changed files with 2005 additions and 1205 deletions
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16
doc/src/sgml/ref/create_language.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_language.sgml,v 1.26 2002/07/24 19:11:07 petere Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_language.sgml,v 1.27 2002/08/22 00:01:40 tgl Exp $
PostgreSQL documentation
-->
@ -108,8 +108,8 @@ CREATE [ TRUSTED ] [ PROCEDURAL ] LANGUAGE <replaceable class="parameter">langna
language such as C with version 1 call convention and
registered with <productname>PostgreSQL</productname> as a
function taking no arguments and returning the
<type>opaque</type> type, a placeholder for unspecified or
undefined types.
<type>language_handler</type> type, a placeholder type that is
simply used to identify the function as a call handler.
</para>
</listitem>
</varlistentry>
@ -122,11 +122,13 @@ CREATE [ TRUSTED ] [ PROCEDURAL ] LANGUAGE <replaceable class="parameter">langna
<replaceable class="parameter">valfunction</replaceable> is the
name of a previously registered function that will be called
when a new function in the language is created, to validate the
new function. The validator function must take one argument of
type <type>oid</type>, which will be the OID of the
to-be-created function, and can have any return type. If no
new function.
If no
validator function is specified, then a new function will not
be checked when it is created.
The validator function must take one argument of
type <type>oid</type>, which will be the OID of the
to-be-created function, and will typically return <type>void</>.
</para>
<para>
@ -251,7 +253,7 @@ ERROR: PL handler function <replaceable class="parameter">funcname</replaceable
The following two commands executed in sequence will register a new
procedural language and the associated call handler.
<programlisting>
CREATE FUNCTION plsample_call_handler () RETURNS opaque
CREATE FUNCTION plsample_call_handler () RETURNS language_handler
AS '$libdir/plsample'
LANGUAGE C;
CREATE LANGUAGE plsample