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Attached patch for unconditional enabling of pltcl-unknown support.

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Enabling this feature adds very light overhead of 1 select from pg_class on
first using of pl/tcl in backend if unknown suppport is really unused.
But pl/tcl with this support has very improved functionality.

Patch includes changes to documentation.
This commit is contained in:
Bruce Momjian
2001-10-13 04:23:50 +00:00
parent 36458b93e0
commit 1d3a47af0c
6 changed files with 18 additions and 67 deletions
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11
doc/src/sgml/installation.sgml
View File

@ -1,4 +1,4 @@
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/installation.sgml,v 1.61 2001/10/09 22:32:32 petere Exp $ -->
<!-- $Header: /cvsroot/pgsql/doc/src/sgml/installation.sgml,v 1.62 2001/10/13 04:23:50 momjian Exp $ -->
<chapter id="installation">
<title><![%standalone-include[<productname>PostgreSQL</>]]>
@ -683,15 +683,6 @@ su - postgres
</listitem>
</varlistentry>
<varlistentry>
<term><option>--enable-pltcl-unknown</option></term>
<listitem>
<para>
Enables enables PL/Tcl unknown support.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>--enable-odbc</option></term>
<listitem>

31
doc/src/sgml/pltcl.sgml
View File

@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/pltcl.sgml,v 2.14 2001/09/13 15:55:23 petere Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/pltcl.sgml,v 2.15 2001/10/13 04:23:50 momjian Exp $
-->
<chapter id="pltcl">
@ -513,11 +513,13 @@ CREATE FUNCTION t1_count(int4, int4) RETURNS int4 AS '
</listitem>
</varlistentry>
<varlistentry>
<term>
Modules and the <function>unknown</> command
</term>
<listitem>
</variablelist>
</sect2>
<sect2>
<title> Modules and the <function>unknown</> command</title>
<para>
PL/Tcl has a special support for things often used. It
recognizes two magic tables, <literal>pltcl_modules</> and
@ -526,20 +528,15 @@ CREATE FUNCTION t1_count(int4, int4) RETURNS int4 AS '
creation. Whenever an unknown Tcl procedure is called, the
unknown proc is asked to check if the procedure is defined in
one of the modules. If this is true, the module is loaded on
demand. To enable this behavior, the
<productname>PostgreSQL</> must be configured with the option
<option>--enable-pltcl-unknown</option>.
demand.
</para>
<para>
There are support scripts to maintain these tables in the modules
subdirectory of the PL/Tcl source including the source for the
unknown module that must get installed initially.
There are support scripts to maintain these tables:
<command>pltcl_loadmod</>,<command>pltcl_listmod</>,
<command>pltcl_delmod</> and source for the
unknown module <filename>share/unknown.pltcl</> that must be loaded
into database initially for getting unknown support.
</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>
</sect1>