diff options
Diffstat (limited to 'doc/src/sgml/ref/create_language.sgml')
| -rw-r--r-- | doc/src/sgml/ref/create_language.sgml | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/doc/src/sgml/ref/create_language.sgml b/doc/src/sgml/ref/create_language.sgml index 1431c32fc5..5cdf5dc934 100644 --- a/doc/src/sgml/ref/create_language.sgml +++ b/doc/src/sgml/ref/create_language.sgml @@ -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 |