mirror of https://github.com/postgres/postgres
Make LANCOMPILER clause in CREATE LANGUAGE optional. Allow "identifier"
syntax for language names (instead of 'string'). createlang now handles the case where a second language uses the same call handler as an already installed language (e.g., plperl/plperlu). droplang now handles the reverse case, i.e., dropping a language where the call handler is still used by another language. Moreover, droplang can now be used to drop any user-defined language, not just the supplied ones.
This commit is contained in:
Peter Eisentraut
parent
38cfc95865
commit
ee8ed85da3
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@ -1,5 +1,5 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_function.sgml,v 1.24 2001/06/04 23:27:23 momjian Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_function.sgml,v 1.25 2001/08/13 21:34:51 petere Exp $
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-->
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<refentry id="SQL-CREATEFUNCTION">
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@ -18,12 +18,12 @@ $Header: /cvsroot/pgsql/doc/src/sgml/ref/create_function.sgml,v 1.24 2001/06/04
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CREATE FUNCTION <replaceable class="parameter">name</replaceable> ( [ <replaceable class="parameter">argtype</replaceable> [, ...] ] )
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RETURNS <replaceable class="parameter">rettype</replaceable>
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AS '<replaceable class="parameter">definition</replaceable>'
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LANGUAGE '<replaceable class="parameter">langname</replaceable>'
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LANGUAGE <replaceable class="parameter">langname</replaceable>
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[ WITH ( <replaceable class="parameter">attribute</replaceable> [, ...] ) ]
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CREATE FUNCTION <replaceable class="parameter">name</replaceable> ( [ <replaceable class="parameter">argtype</replaceable> [, ...] ] )
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RETURNS <replaceable class="parameter">rettype</replaceable>
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AS '<replaceable class="parameter">obj_file</replaceable>', '<replaceable class="parameter">link_symbol</replaceable>'
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LANGUAGE '<replaceable class="parameter">langname</replaceable>'
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LANGUAGE <replaceable class="parameter">langname</replaceable>
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[ WITH ( <replaceable class="parameter">attribute</replaceable> [, ...] ) ]
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</synopsis>
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</refsynopsisdiv>
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@ -123,13 +123,14 @@ CREATE FUNCTION <replaceable class="parameter">name</replaceable> ( [ <replaceab
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<listitem>
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<para>
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May be '<literal>sql</literal>', '<literal>C</literal>',
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'<literal>internal</literal>', or '<replaceable
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class="parameter">plname</replaceable>', where '<replaceable
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class="parameter">plname</replaceable>' is the name of a
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May be <literal>SQL</literal>, <literal>C</literal>,
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<literal>internal</literal>, or <replaceable
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class="parameter">plname</replaceable>, where <replaceable
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class="parameter">plname</replaceable> is the name of a
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created procedural language. See
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<xref linkend="sql-createlanguage">
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for details.
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for details. For backward compatibility, the name may be
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enclosed by single quotes.
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</para>
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</listitem>
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</varlistentry>
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@ -261,7 +262,7 @@ CREATE FUNCTION <replaceable class="parameter">name</replaceable> ( [ <replaceab
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<programlisting>
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CREATE FUNCTION one() RETURNS integer
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AS 'SELECT 1 AS RESULT;'
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LANGUAGE 'sql';
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LANGUAGE SQL;
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SELECT one() AS answer;
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<computeroutput>
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@ -281,7 +282,7 @@ SELECT one() AS answer;
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<programlisting>
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CREATE FUNCTION ean_checkdigit(char, char) RETURNS boolean
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AS '/usr1/proj/bray/sql/funcs.so' LANGUAGE 'c';
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AS '/usr1/proj/bray/sql/funcs.so' LANGUAGE C;
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CREATE TABLE product (
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id char(8) PRIMARY KEY,
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@ -306,7 +307,7 @@ CREATE TABLE product (
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<programlisting>
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CREATE FUNCTION point(complex) RETURNS point
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AS '/home/bernie/pgsql/lib/complex.so', 'complex_to_point'
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LANGUAGE 'c';
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LANGUAGE C;
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</programlisting>
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The C declaration of the function could be:
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@ -1,5 +1,5 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_language.sgml,v 1.14 2000/11/20 20:36:46 tgl Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/create_language.sgml,v 1.15 2001/08/13 21:34:51 petere Exp $
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Postgres documentation
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-->
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@ -23,9 +23,8 @@ Postgres documentation
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<date>1999-07-20</date>
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</refsynopsisdivinfo>
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<synopsis>
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CREATE [ TRUSTED ] [ PROCEDURAL ] LANGUAGE '<replaceable class="parameter">langname</replaceable>'
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CREATE [ TRUSTED ] [ PROCEDURAL ] LANGUAGE <replaceable class="parameter">langname</replaceable>
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HANDLER <replaceable class="parameter">call_handler</replaceable>
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LANCOMPILER '<replaceable class="parameter">comment</replaceable>'
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</synopsis>
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<refsect2 id="R2-SQL-CREATELANGUAGE-1">
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@ -62,6 +61,10 @@ CREATE [ TRUSTED ] [ PROCEDURAL ] LANGUAGE '<replaceable class="parameter">langn
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language cannot override one of the built-in languages of
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<productname>Postgres</productname>.
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</para>
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<para>
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For backward compatibility, the name may be enclosed by single
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quotes.
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</para>
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</listitem>
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</varlistentry>
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@ -77,20 +80,6 @@ CREATE [ TRUSTED ] [ PROCEDURAL ] LANGUAGE '<replaceable class="parameter">langn
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="parameter">comment</replaceable></term>
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<listitem>
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<para>
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The <function>LANCOMPILER</function> argument is the
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string that will be
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inserted in the <literal>LANCOMPILER</literal> attribute
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of the new
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<filename>pg_language</filename> entry. At present,
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<productname>Postgres</productname> does not use
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this attribute in any way.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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@ -346,10 +335,9 @@ plsample_call_handler(PG_FUNCTION_ARGS)
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<programlisting>
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CREATE FUNCTION plsample_call_handler () RETURNS opaque
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AS '/usr/local/pgsql/lib/plsample.so'
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LANGUAGE 'C';
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CREATE PROCEDURAL LANGUAGE 'plsample'
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HANDLER plsample_call_handler
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LANCOMPILER 'PL/Sample';
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LANGUAGE C;
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CREATE LANGUAGE plsample
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HANDLER plsample_call_handler;
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</programlisting>
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</para>
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</refsect1>
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@ -1,5 +1,5 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_language.sgml,v 1.9 2000/12/25 23:15:26 petere Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/drop_language.sgml,v 1.10 2001/08/13 21:34:51 petere Exp $
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Postgres documentation
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-->
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@ -23,7 +23,7 @@ Postgres documentation
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<date>1999-07-20</date>
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</refsynopsisdivinfo>
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<synopsis>
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DROP [ PROCEDURAL ] LANGUAGE '<replaceable class="PARAMETER">name</replaceable>'
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DROP [ PROCEDURAL ] LANGUAGE <replaceable class="PARAMETER">name</replaceable>
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</synopsis>
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<refsect2 id="R2-SQL-DROPLANGUAGE-1">
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@ -40,7 +40,8 @@ DROP [ PROCEDURAL ] LANGUAGE '<replaceable class="PARAMETER">name</replaceable>'
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<term><replaceable class="PARAMETER">name</replaceable></term>
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<listitem>
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<para>
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The name of an existing procedural language.
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The name of an existing procedural language. For backward
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compatibility, the name may be enclosed by single quotes.
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</para>
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</listitem>
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</varlistentry>
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@ -132,7 +133,7 @@ ERROR: Language "<replaceable class="parameter">name</replaceable>" doesn't exis
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This command removes the PL/Sample language:
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<programlisting>
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DROP PROCEDURAL LANGUAGE 'plsample';
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DROP LANGUAGE plsample;
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</programlisting>
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</para>
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</refsect1>
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@ -1,5 +1,5 @@
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/xplang.sgml,v 1.13 2001/05/19 09:01:10 petere Exp $
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$Header: /cvsroot/pgsql/doc/src/sgml/xplang.sgml,v 1.14 2001/08/13 21:34:51 petere Exp $
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-->
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<chapter id="xplang">
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@ -79,7 +79,7 @@ createlang plpgsql template1
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<synopsis>
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CREATE FUNCTION <replaceable>handler_function_name</replaceable> ()
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RETURNS OPAQUE AS
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'<replaceable>path-to-shared-object</replaceable>' LANGUAGE 'C';
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'<replaceable>path-to-shared-object</replaceable>' LANGUAGE C;
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</synopsis>
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The special return type of <type>OPAQUE</type> tells
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the database that this function does not return one of
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@ -92,9 +92,8 @@ CREATE FUNCTION <replaceable>handler_function_name</replaceable> ()
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<para>
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The PL must be declared with the command
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<synopsis>
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CREATE <optional>TRUSTED</optional> <optional>PROCEDURAL</optional> LANGUAGE '<replaceable>language-name</replaceable>'
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HANDLER <replaceable>handler_function_name</replaceable>
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LANCOMPILER '<replaceable>description</replaceable>';
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CREATE <optional>TRUSTED</optional> <optional>PROCEDURAL</optional> LANGUAGE <replaceable>language-name</replaceable>
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HANDLER <replaceable>handler_function_name</replaceable>;
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</synopsis>
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The optional key word <token>TRUSTED</token> tells
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whether ordinary database users that have no superuser
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@ -130,7 +129,7 @@ CREATE <optional>TRUSTED</optional> <optional>PROCEDURAL</optional> LANGUAGE '<r
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<programlisting>
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CREATE FUNCTION plpgsql_call_handler () RETURNS OPAQUE AS
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'$libdir/plpgsql' LANGUAGE 'C';
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'$libdir/plpgsql' LANGUAGE C;
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</programlisting>
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</para>
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</step>
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@ -139,9 +138,8 @@ CREATE FUNCTION plpgsql_call_handler () RETURNS OPAQUE AS
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<para>
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The command
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<programlisting>
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CREATE TRUSTED PROCEDURAL LANGUAGE 'plpgsql'
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HANDLER plpgsql_call_handler
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LANCOMPILER 'PL/pgSQL';
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CREATE TRUSTED PROCEDURAL LANGUAGE plpgsql
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HANDLER plpgsql_call_handler;
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</programlisting>
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then defines that the previously declared call handler function
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should be invoked for functions and trigger procedures where the
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@ -11,7 +11,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.243 2001/08/10 18:57:36 tgl Exp $
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* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.244 2001/08/13 21:34:51 petere Exp $
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*
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* HISTORY
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* AUTHOR DATE MAJOR EVENT
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@ -163,7 +163,8 @@ static void doNegateFloat(Value *v);
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%type <list> OptUserList
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%type <defelt> OptUserElem
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%type <boolean> TriggerActionTime, TriggerForSpec, PLangTrusted, opt_procedural
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%type <boolean> TriggerActionTime, TriggerForSpec, opt_trusted, opt_procedural
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%type <str> opt_lancompiler
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%type <str> OptConstrFromTable
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@ -1688,23 +1689,26 @@ IntegerOnly: Iconst
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*
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*****************************************************************************/
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CreatePLangStmt: CREATE PLangTrusted opt_procedural LANGUAGE Sconst
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HANDLER func_name LANCOMPILER Sconst
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CreatePLangStmt: CREATE opt_trusted opt_procedural LANGUAGE ColId_or_Sconst
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HANDLER func_name opt_lancompiler
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{
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CreatePLangStmt *n = makeNode(CreatePLangStmt);
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n->plname = $5;
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n->plhandler = $7;
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n->plcompiler = $9;
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n->plcompiler = $8;
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n->pltrusted = $2;
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$$ = (Node *)n;
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}
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;
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PLangTrusted: TRUSTED { $$ = TRUE; }
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opt_trusted: TRUSTED { $$ = TRUE; }
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| /*EMPTY*/ { $$ = FALSE; }
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;
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DropPLangStmt: DROP opt_procedural LANGUAGE Sconst
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opt_lancompiler: LANCOMPILER Sconst { $$ = $2; }
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| /*EMPTY*/ { $$ = ""; }
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DropPLangStmt: DROP opt_procedural LANGUAGE ColId_or_Sconst
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{
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DropPLangStmt *n = makeNode(DropPLangStmt);
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n->plname = $4;
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@ -2511,7 +2515,7 @@ RecipeStmt: EXECUTE RECIPE recipe_name
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*****************************************************************************/
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ProcedureStmt: CREATE FUNCTION func_name func_args
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RETURNS func_return AS func_as LANGUAGE Sconst opt_with
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RETURNS func_return AS func_as LANGUAGE ColId_or_Sconst opt_with
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{
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ProcedureStmt *n = makeNode(ProcedureStmt);
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n->funcname = $3;
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@ -7,7 +7,7 @@
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# Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
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# Portions Copyright (c) 1994, Regents of the University of California
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#
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# $Header: /cvsroot/pgsql/src/bin/scripts/Attic/createlang.sh,v 1.28 2001/06/18 21:40:06 momjian Exp $
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# $Header: /cvsroot/pgsql/src/bin/scripts/Attic/createlang.sh,v 1.29 2001/08/13 21:34:54 petere Exp $
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#
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#-------------------------------------------------------------------------
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@ -121,7 +121,7 @@ do
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shift
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done
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if [ "$usage" ]; then
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if [ -n "$usage" ]; then
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echo "$CMDNAME installs a procedural language into a PostgreSQL database."
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echo
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echo "Usage:"
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@ -158,7 +158,7 @@ fi
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# List option
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# ----------
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if [ "$list" ]; then
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sqlcmd="SELECT lanname as \"Name\", lanpltrusted as \"Trusted?\", lancompiler as \"Compiler\" FROM pg_language WHERE lanispl = 't';"
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sqlcmd="SELECT lanname as \"Name\", lanpltrusted as \"Trusted?\" FROM pg_language WHERE lanispl = TRUE;"
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if [ "$showsql" = yes ]; then
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echo "$sqlcmd"
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fi
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@ -185,46 +185,43 @@ fi
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# ----------
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# Check if supported and set related values
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# ----------
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langname=`echo "$langname" | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
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case "$langname" in
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plpgsql)
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lancomp="PL/pgSQL"
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trusted="TRUSTED "
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handler="plpgsql_call_handler"
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object="plpgsql"
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;;
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pltcl)
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lancomp="PL/Tcl"
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trusted="TRUSTED "
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handler="pltcl_call_handler"
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object="pltcl"
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;;
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pltclu)
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lancomp="PL/Tcl (untrusted)"
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trusted=""
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handler="pltclu_call_handler"
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object="pltcl"
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;;
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plperl)
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lancomp="PL/Perl"
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trusted="TRUSTED "
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handler="plperl_call_handler"
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object="plperl"
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;;
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plperlu)
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lancomp="PL/Perl (untrusted)"
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trusted=""
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handler="plperl_call_handler"
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object="plperl"
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;;
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plpython)
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lancomp="PL/Python"
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trusted="TRUSTED "
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handler="plpython_call_handler"
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object="plpython"
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;;
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*)
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echo "$CMDNAME: unsupported language '$langname'" 1>&2
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echo "Supported languages are 'plpgsql', 'pltcl', 'pltclu', 'plperl', and 'plpython'." 1>&2
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echo "$CMDNAME: unsupported language \"$langname\"" 1>&2
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echo "Supported languages are plpgsql, pltcl, pltclu, plperl, plperlu, and plpython." 1>&2
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exit 1
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;;
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esac
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@ -244,39 +241,42 @@ if [ $? -ne 0 ]; then
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echo "$CMDNAME: external error" 1>&2
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exit 1
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fi
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if [ "$res" ]; then
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echo "$CMDNAME: '$langname' is already installed in database $dbname" 1>&2
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if [ -n "$res" ]; then
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echo "$CMDNAME: language \"$langname\" is already installed in database $dbname" 1>&2
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# separate exit status for "already installed"
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exit 2
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fi
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# ----------
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# Check that there is no function named as the call handler
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# Check whether the call handler exists
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# ----------
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sqlcmd="SELECT oid FROM pg_proc WHERE proname = '$handler';"
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sqlcmd="SELECT oid FROM pg_proc WHERE proname = '$handler' AND prorettype = 0 AND pronargs = 0;"
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if [ "$showsql" = yes ]; then
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echo "$sqlcmd"
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fi
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res=`$PSQL "$sqlcmd"`
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if [ ! -z "$res" ]; then
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echo "$CMDNAME: A function named '$handler' already exists. Installation aborted." 1>&2
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exit 1
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if [ -n "$res" ]; then
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handlerexists=yes
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else
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handlerexists=no
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fi
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# ----------
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# Create the call handler and the language
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# ----------
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sqlcmd="CREATE FUNCTION $handler () RETURNS OPAQUE AS '$PGLIB/${object}' LANGUAGE 'C';"
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if [ "$showsql" = yes ]; then
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echo "$sqlcmd"
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fi
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$PSQL "$sqlcmd"
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if [ $? -ne 0 ]; then
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echo "$CMDNAME: language installation failed" 1>&2
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exit 1
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if [ "$handlerexists" = no ]; then
|
||||
sqlcmd="CREATE FUNCTION \"$handler\" () RETURNS OPAQUE AS '$PGLIB/${object}' LANGUAGE C;"
|
||||
if [ "$showsql" = yes ]; then
|
||||
echo "$sqlcmd"
|
||||
fi
|
||||
$PSQL "$sqlcmd"
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "$CMDNAME: language installation failed" 1>&2
|
||||
exit 1
|
||||
fi
|
||||
fi
|
||||
|
||||
sqlcmd="CREATE ${trusted}PROCEDURAL LANGUAGE '$langname' HANDLER $handler LANCOMPILER '$lancomp';"
|
||||
sqlcmd="CREATE ${trusted}LANGUAGE \"$langname\" HANDLER \"$handler\";"
|
||||
if [ "$showsql" = yes ]; then
|
||||
echo "$sqlcmd"
|
||||
fi
|
||||
|
|
|
|||
|
|
@ -7,7 +7,7 @@
|
|||
# Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
|
||||
# Portions Copyright (c) 1994, Regents of the University of California
|
||||
#
|
||||
# $Header: /cvsroot/pgsql/src/bin/scripts/Attic/droplang,v 1.15 2001/05/12 01:30:30 petere Exp $
|
||||
# $Header: /cvsroot/pgsql/src/bin/scripts/Attic/droplang,v 1.16 2001/08/13 21:34:54 petere Exp $
|
||||
#
|
||||
#-------------------------------------------------------------------------
|
||||
|
||||
|
|
@ -130,7 +130,7 @@ fi
|
|||
|
||||
|
||||
if [ "$list" ]; then
|
||||
sqlcmd="SELECT lanname as \"Name\", lanpltrusted as \"Trusted?\", lancompiler as \"Compiler\" FROM pg_language WHERE lanispl = 't'"
|
||||
sqlcmd="SELECT lanname as \"Name\", lanpltrusted as \"Trusted?\" FROM pg_language WHERE lanispl = TRUE"
|
||||
if [ "$showsql" = yes ]; then
|
||||
echo "$sqlcmd"
|
||||
fi
|
||||
|
|
@ -157,55 +157,23 @@ if [ -z "$langname" ]; then
|
|||
read langname
|
||||
fi
|
||||
|
||||
# ----------
|
||||
# Check if supported and set related values
|
||||
# ----------
|
||||
case "$langname" in
|
||||
plpgsql)
|
||||
lancomp="PL/pgSQL"
|
||||
handler="plpgsql_call_handler"
|
||||
;;
|
||||
pltcl)
|
||||
lancomp="PL/Tcl"
|
||||
handler="pltcl_call_handler"
|
||||
;;
|
||||
pltclu)
|
||||
lancomp="PL/Tcl (untrusted)"
|
||||
handler="pltclu_call_handler"
|
||||
;;
|
||||
plperl)
|
||||
lancomp="PL/Perl"
|
||||
handler="plperl_call_handler"
|
||||
;;
|
||||
plpython)
|
||||
lancomp="PL/Python"
|
||||
handler="plpython_call_handler"
|
||||
;;
|
||||
*)
|
||||
echo "$CMDNAME: unsupported language '$langname'" 1>&2
|
||||
echo "Supported languages are 'plpgsql', 'pltcl', 'pltclu', 'plperl', and 'plpython'." 1>&2
|
||||
exit 1
|
||||
;;
|
||||
esac
|
||||
|
||||
|
||||
PSQL="${PATHNAME}psql -A -t -q $PSQLOPT -d $dbname -c"
|
||||
|
||||
|
||||
# ----------
|
||||
# Make sure the language is installed
|
||||
# Make sure the language is installed and find the oid of the handler function
|
||||
# ----------
|
||||
sqlcmd="SELECT oid FROM pg_language WHERE lanname = '$langname';"
|
||||
sqlcmd="SELECT lanplcallfoid FROM pg_language WHERE lanname = '$langname' AND lanispl;"
|
||||
if [ "$showsql" = yes ]; then
|
||||
echo "$sqlcmd"
|
||||
fi
|
||||
res=`$PSQL "$sqlcmd"`
|
||||
lanplcallfoid=`$PSQL "$sqlcmd"`
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "$CMDNAME: external error" 1>&2
|
||||
exit 1
|
||||
fi
|
||||
if [ -z "$res" ]; then
|
||||
echo "$CMDNAME: '$langname' is not installed in database $dbname" 1>&2
|
||||
if [ -z "$lanplcallfoid" ]; then
|
||||
echo "$CMDNAME: language \"$langname\" is not installed in database $dbname" 1>&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
|
|
@ -224,14 +192,32 @@ if [ $? -ne 0 ]; then
|
|||
fi
|
||||
if [ "$res" -ne 0 ]; then
|
||||
echo "$CMDNAME: There are $res functions/trigger procedures declared in language" 1>&2
|
||||
echo "$lancomp. Language not removed." 1>&2
|
||||
echo "$langname. Language not removed." 1>&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
# ----------
|
||||
# Drop the language and the call handler function
|
||||
# Check that the handler function isn't used by some other language
|
||||
# ----------
|
||||
sqlcmd="DROP PROCEDURAL LANGUAGE '$langname';"
|
||||
sqlcmd="SELECT count(*) FROM pg_language WHERE lanplcallfoid = $lanplcallfoid AND lanname <> '$langname';"
|
||||
if [ "$showsql" = yes ]; then
|
||||
echo "$sqlcmd"
|
||||
fi
|
||||
res=`$PSQL "$sqlcmd"`
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "$CMDNAME: external error" 1>&2
|
||||
exit 1
|
||||
fi
|
||||
if [ "$res" -eq 0 ]; then
|
||||
keephandler=no
|
||||
else
|
||||
keephandler=yes
|
||||
fi
|
||||
|
||||
# ----------
|
||||
# Drop the language
|
||||
# ----------
|
||||
sqlcmd="DROP LANGUAGE \"$langname\";"
|
||||
if [ "$showsql" = yes ]; then
|
||||
echo "$sqlcmd"
|
||||
fi
|
||||
|
|
@ -241,7 +227,24 @@ if [ $? -ne 0 ]; then
|
|||
exit 1
|
||||
fi
|
||||
|
||||
sqlcmd="DROP FUNCTION $handler();"
|
||||
# ----------
|
||||
# Drop the call handler
|
||||
# ----------
|
||||
if [ "$keephandler" = yes ]; then
|
||||
exit 0
|
||||
fi
|
||||
|
||||
sqlcmd="SELECT proname FROM pg_proc WHERE oid = $lanplcallfoid;"
|
||||
if [ "$showsql" = yes ]; then
|
||||
echo "$sqlcmd"
|
||||
fi
|
||||
handler=`$PSQL "$sqlcmd"`
|
||||
if [ $? -ne 0 ]; then
|
||||
echo "$CMDNAME: external error" 1>&2
|
||||
exit 1
|
||||
fi
|
||||
|
||||
sqlcmd="DROP FUNCTION \"$handler\" ();"
|
||||
if [ "$showsql" = yes ]; then
|
||||
echo "$sqlcmd"
|
||||
fi
|
||||
|
|
|
|||
Loading…
Reference in New Issue