Remove createlang and droplang

They have been deprecated since PostgreSQL 9.1.

Reviewed-by: Magnus Hagander <magnus@hagander.net>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>

Author: petere

doc/src/sgml/installation.sgml

@@ -2256,17 +2256,17 @@ hosts=local4,bind4
      memory management.  You can have a server with many multiples of
      gigabytes of RAM free, but still get out of memory or address
      space errors when running applications.  One example
-     is <command>createlang</command> failing with unusual errors.
+     is loading of extensions failing with unusual errors.
      For example, running as the owner of the PostgreSQL installation:
 <screen>
--bash-3.00$ createlang plperl template1
-createlang: language installation failed: ERROR:  could not load library "/opt/dbs/pgsql748/lib/plperl.so": A memory address is not in the address space for the process.
+=# CREATE EXTENSION plperl;
+ERROR:  could not load library "/opt/dbs/pgsql/lib/plperl.so": A memory address is not in the address space for the process.
 </screen>
     Running as a non-owner in the group possessing the PostgreSQL
     installation:
 <screen>
--bash-3.00$ createlang plperl template1
-createlang: language installation failed: ERROR:  could not load library "/opt/dbs/pgsql748/lib/plperl.so": Bad address
+=# CREATE EXTENSION plperl;
+ERROR:  could not load library "/opt/dbs/pgsql/lib/plperl.so": Bad address
 </screen>
      Another example is out of memory errors in the PostgreSQL server
      logs, with every memory allocation near or greater than 256 MB
@@ -2284,7 +2284,7 @@ createlang: language installation failed: ERROR:  could not load library "/opt/d
     </para>
 
     <para>
-     In the case of the <command>createlang</command> example, above,
+     In the case of the <literal>plperl</literal> example, above,
      check your umask and the permissions of the binaries in your
      PostgreSQL installation.  The binaries involved in that example
      were 32-bit and installed as mode 750 instead of 755.  Due to the

doc/src/sgml/plperl.sgml

@@ -27,8 +27,7 @@
 
   <para>
    To install PL/Perl in a particular database, use
-   <literal>CREATE EXTENSION plperl</>, or from the shell command line use
-   <literal>createlang plperl <replaceable>dbname</></literal>.
+   <literal>CREATE EXTENSION plperl</>.
   </para>
 
   <tip>

doc/src/sgml/plpython.sgml

@@ -14,8 +14,7 @@
 
  <para>
   To install PL/Python in a particular database, use
-  <literal>CREATE EXTENSION plpythonu</>, or from the shell command line use
-  <literal>createlang plpythonu <replaceable>dbname</></literal> (but
+  <literal>CREATE EXTENSION plpythonu</> (but
   see also <xref linkend="plpython-python23">).
  </para>
 

doc/src/sgml/pltcl.sgml

@@ -66,10 +66,9 @@
     directory if Tcl support is specified in the configuration step of
     the installation procedure.  To install <application>PL/Tcl</>
     and/or <application>PL/TclU</> in a particular database, use the
-    <command>CREATE EXTENSION</> command or the
-    <command>createlang</command> program, for example
-    <literal>createlang pltcl <replaceable>dbname</></literal> or
-    <literal>createlang pltclu <replaceable>dbname</></literal>.
+    <command>CREATE EXTENSION</> command, for example
+    <literal>CREATE EXTENSION pltcl</literal> or
+    <literal>CREATE EXTENSION pltclu</literal>.
    </para>
   </sect1>
 

doc/src/sgml/ref/allfiles.sgml

@@ -182,10 +182,8 @@ Complete list of usable sgml source files in this directory.
 <!-- applications and utilities -->
 <!ENTITY clusterdb          SYSTEM "clusterdb.sgml">
 <!ENTITY createdb           SYSTEM "createdb.sgml">
-<!ENTITY createlang         SYSTEM "createlang.sgml">
 <!ENTITY createuser         SYSTEM "createuser.sgml">
 <!ENTITY dropdb             SYSTEM "dropdb.sgml">
-<!ENTITY droplang           SYSTEM "droplang.sgml">
 <!ENTITY dropuser           SYSTEM "dropuser.sgml">
 <!ENTITY ecpgRef            SYSTEM "ecpg-ref.sgml">
 <!ENTITY initdb             SYSTEM "initdb.sgml">

doc/src/sgml/ref/create_function.sgml

@@ -847,7 +847,6 @@ COMMIT;
    <member><xref linkend="sql-grant"></member>
    <member><xref linkend="sql-load"></member>
    <member><xref linkend="sql-revoke"></member>
-   <member><xref linkend="app-createlang"></member>
   </simplelist>
  </refsect1>
 

doc/src/sgml/ref/create_language.sgml

@@ -230,21 +230,14 @@ CREATE [ OR REPLACE ] [ TRUSTED ] [ PROCEDURAL ] LANGUAGE <replaceable class="pa
   <title>Notes</title>
 
   <para>
-   The <xref linkend="app-createlang"> program is a simple wrapper around
-   the <command>CREATE LANGUAGE</> command.  It eases
-   installation of procedural languages from the shell command line.
-  </para>
-
-  <para>
-   Use <xref linkend="sql-droplanguage">, or better yet the <xref
-   linkend="app-droplang"> program, to drop procedural languages.
+   Use <xref linkend="sql-droplanguage"> to drop procedural languages.
   </para>
 
   <para>
    The system catalog <classname>pg_language</classname> (see <xref
    linkend="catalog-pg-language">) records information about the
-   currently installed languages.  Also, <command>createlang</command>
-   has an option to list the installed languages.
+   currently installed languages.  Also, the <application>psql</application>
+   command <command>\dL</command> lists the installed languages.
   </para>
 
   <para>
@@ -325,8 +318,6 @@ CREATE LANGUAGE plsample
    <member><xref linkend="sql-droplanguage"></member>
    <member><xref linkend="sql-grant"></member>
    <member><xref linkend="sql-revoke"></member>
-   <member><xref linkend="app-createlang"></member>
-   <member><xref linkend="app-droplang"></member>
   </simplelist>
  </refsect1>
 </refentry>