Remove unnecessary use of PROCEDURAL

Remove some unnecessary, legacy-looking use of the PROCEDURAL keyword
before LANGUAGE.  We mostly don't use this anymore, so some of these
look a bit old.

There is still some use in pg_dump, which is harder to remove because
it's baked into the archive format, so I'm not touching that.

Discussion: https://www.postgresql.org/message-id/2330919b-62d9-29ac-8de3-58c024fdcb96@2ndquadrant.com

Author: petere

doc/src/sgml/xplang.sgml

@@ -137,7 +137,7 @@ CREATE FUNCTION <replaceable>validator_function_name</replaceable>(oid)
      <para>
       Finally, the PL must be declared with the command
 <synopsis>
-CREATE <optional>TRUSTED</optional> <optional>PROCEDURAL</optional> LANGUAGE <replaceable>language-name</replaceable>
+CREATE <optional>TRUSTED</optional> LANGUAGE <replaceable>language-name</replaceable>
     HANDLER <replaceable>handler_function_name</replaceable>
     <optional>INLINE <replaceable>inline_function_name</replaceable></optional>
     <optional>VALIDATOR <replaceable>validator_function_name</replaceable></optional> ;
@@ -200,7 +200,7 @@ CREATE FUNCTION plperl_validator(oid) RETURNS void AS
      <para>
       The command:
 <programlisting>
-CREATE TRUSTED PROCEDURAL LANGUAGE plperl
+CREATE TRUSTED LANGUAGE plperl
     HANDLER plperl_call_handler
     INLINE plperl_inline_handler
     VALIDATOR plperl_validator;

src/backend/commands/proclang.c

@@ -1,7 +1,7 @@
 /*-------------------------------------------------------------------------
  *
  * proclang.c
- *	  PostgreSQL PROCEDURAL LANGUAGE support code.
+ *	  PostgreSQL LANGUAGE support code.
  *
  * Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
@@ -55,9 +55,8 @@ static ObjectAddress create_proc_lang(const char *languageName, bool replace,
 				 Oid valOid, bool trusted);
 static PLTemplate *find_language_template(const char *languageName);
 
-/* ---------------------------------------------------------------------
- * CREATE PROCEDURAL LANGUAGE
- * ---------------------------------------------------------------------
+/*
+ * CREATE LANGUAGE
  */
 ObjectAddress
 CreateProceduralLanguage(CreatePLangStmt *stmt)

src/include/nodes/parsenodes.h

@@ -2433,8 +2433,7 @@ typedef struct AlterEventTrigStmt
 } AlterEventTrigStmt;
 
 /* ----------------------
- *		Create/Drop PROCEDURAL LANGUAGE Statements
- *		Create PROCEDURAL LANGUAGE Statements
+ *		Create LANGUAGE Statements
  * ----------------------
  */
 typedef struct CreatePLangStmt

src/pl/plperl/plperl--1.0.sql

@@ -6,6 +6,6 @@
  * knowledge into this script.
  */
 
-CREATE PROCEDURAL LANGUAGE plperl;
+CREATE LANGUAGE plperl;
 
-COMMENT ON PROCEDURAL LANGUAGE plperl IS 'PL/Perl procedural language';
+COMMENT ON LANGUAGE plperl IS 'PL/Perl procedural language';

src/pl/plperl/plperl--unpackaged--1.0.sql

@@ -1,6 +1,6 @@
 /* src/pl/plperl/plperl--unpackaged--1.0.sql */
 
-ALTER EXTENSION plperl ADD PROCEDURAL LANGUAGE plperl;
+ALTER EXTENSION plperl ADD LANGUAGE plperl;
 -- ALTER ADD LANGUAGE doesn't pick up the support functions, so we have to.
 ALTER EXTENSION plperl ADD FUNCTION plperl_call_handler();
 ALTER EXTENSION plperl ADD FUNCTION plperl_inline_handler(internal);

src/pl/plperl/plperlu--1.0.sql

@@ -6,6 +6,6 @@
  * knowledge into this script.
  */
 
-CREATE PROCEDURAL LANGUAGE plperlu;
+CREATE LANGUAGE plperlu;
 
-COMMENT ON PROCEDURAL LANGUAGE plperlu IS 'PL/PerlU untrusted procedural language';
+COMMENT ON LANGUAGE plperlu IS 'PL/PerlU untrusted procedural language';

src/pl/plperl/plperlu--unpackaged--1.0.sql

@@ -1,6 +1,6 @@
 /* src/pl/plperl/plperlu--unpackaged--1.0.sql */
 
-ALTER EXTENSION plperlu ADD PROCEDURAL LANGUAGE plperlu;
+ALTER EXTENSION plperlu ADD LANGUAGE plperlu;
 -- ALTER ADD LANGUAGE doesn't pick up the support functions, so we have to.
 ALTER EXTENSION plperlu ADD FUNCTION plperlu_call_handler();
 ALTER EXTENSION plperlu ADD FUNCTION plperlu_inline_handler(internal);

src/pl/plpgsql/src/plpgsql--1.0.sql

@@ -6,6 +6,6 @@
  * knowledge into this script.
  */
 
-CREATE PROCEDURAL LANGUAGE plpgsql;
+CREATE LANGUAGE plpgsql;
 
-COMMENT ON PROCEDURAL LANGUAGE plpgsql IS 'PL/pgSQL procedural language';
+COMMENT ON LANGUAGE plpgsql IS 'PL/pgSQL procedural language';

src/pl/plpgsql/src/plpgsql--unpackaged--1.0.sql

@@ -1,6 +1,6 @@
 /* src/pl/plpgsql/src/plpgsql--unpackaged--1.0.sql */
 
-ALTER EXTENSION plpgsql ADD PROCEDURAL LANGUAGE plpgsql;
+ALTER EXTENSION plpgsql ADD LANGUAGE plpgsql;
 -- ALTER ADD LANGUAGE doesn't pick up the support functions, so we have to.
 ALTER EXTENSION plpgsql ADD FUNCTION plpgsql_call_handler();
 ALTER EXTENSION plpgsql ADD FUNCTION plpgsql_inline_handler(internal);

src/pl/plpython/plpython2u--1.0.sql

@@ -6,6 +6,6 @@
  * knowledge into this script.
  */
 
-CREATE PROCEDURAL LANGUAGE plpython2u;
+CREATE LANGUAGE plpython2u;
 
-COMMENT ON PROCEDURAL LANGUAGE plpython2u IS 'PL/Python2U untrusted procedural language';
+COMMENT ON LANGUAGE plpython2u IS 'PL/Python2U untrusted procedural language';