Remove hstore % text[] operator; use slice() function instead.

David Wheeler, with one small correction by me.

contrib/hstore/expected/hstore.out

@@ -4,7 +4,7 @@
 --
 SET client_min_messages = warning;
 \set ECHO none
-psql:hstore.sql:234: WARNING:  => is deprecated as an operator name
+psql:hstore.sql:228: WARNING:  => is deprecated as an operator name
 DETAIL:  This name may be disallowed altogether in future versions of PostgreSQL.
 RESET client_min_messages;
 set escape_string_warning=off;
@@ -759,39 +759,39 @@ select pg_column_size('a=>g, b=>c'::hstore || ('b'=>'gf'))
  t
 (1 row)
 
--- %
-select hstore 'aa=>1, b=>2, c=>3' % ARRAY['g','h','i'];
- ?column? 
-----------
+-- slice()
+select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['g','h','i']);
+ slice 
+-------
  
 (1 row)
 
-select hstore 'aa=>1, b=>2, c=>3' % ARRAY['c','b'];
-      ?column?      
+select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b']);
+       slice        
 --------------------
  "b"=>"2", "c"=>"3"
 (1 row)
 
-select hstore 'aa=>1, b=>2, c=>3' % ARRAY['aa','b'];
-      ?column?       
+select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['aa','b']);
+        slice        
 ---------------------
  "b"=>"2", "aa"=>"1"
 (1 row)
 
-select hstore 'aa=>1, b=>2, c=>3' % ARRAY['c','b','aa'];
-           ?column?            
+select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b','aa']);
+             slice             
 -------------------------------
  "b"=>"2", "c"=>"3", "aa"=>"1"
 (1 row)
 
-select pg_column_size(hstore 'aa=>1, b=>2, c=>3' % ARRAY['c','b'])
+select pg_column_size(slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b']))
          = pg_column_size('b=>2, c=>3'::hstore);
  ?column? 
 ----------
  t
 (1 row)
 
-select pg_column_size(hstore 'aa=>1, b=>2, c=>3' % ARRAY['c','b','aa'])
+select pg_column_size(slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b','aa']))
          = pg_column_size('aa=>1, b=>2, c=>3'::hstore);
  ?column? 
 ----------

contrib/hstore/hstore.sql.in

-/* $PostgreSQL: pgsql/contrib/hstore/hstore.sql.in,v 1.14 2010/06/18 03:52:02 rhaas Exp $ */
+/* $PostgreSQL: pgsql/contrib/hstore/hstore.sql.in,v 1.15 2010/07/02 20:36:48 rhaas Exp $ */
 
 -- Adjust this setting to control where the objects get created.
 SET search_path = public;
@@ -61,17 +61,11 @@ CREATE OPERATOR -> (
 	PROCEDURE = slice_array
 );
 
-CREATE OR REPLACE FUNCTION slice_hstore(hstore,text[])
+CREATE OR REPLACE FUNCTION slice(hstore,text[])
 RETURNS hstore
 AS 'MODULE_PATHNAME','hstore_slice_to_hstore'
 LANGUAGE C STRICT IMMUTABLE;
 
-CREATE OPERATOR % (
-	LEFTARG = hstore,
-	RIGHTARG = text[],
-	PROCEDURE = slice_hstore
-);
-
 CREATE OR REPLACE FUNCTION isexists(hstore,text)
 RETURNS bool
 AS 'MODULE_PATHNAME','hstore_exists'

contrib/hstore/sql/hstore.sql

@@ -171,14 +171,14 @@ select pg_column_size(('b'=>'gf'))
 select pg_column_size('a=>g, b=>c'::hstore || ('b'=>'gf'))
          = pg_column_size('a=>g, b=>gf'::hstore);
 
--- %
-select hstore 'aa=>1, b=>2, c=>3' % ARRAY['g','h','i'];
-select hstore 'aa=>1, b=>2, c=>3' % ARRAY['c','b'];
-select hstore 'aa=>1, b=>2, c=>3' % ARRAY['aa','b'];
-select hstore 'aa=>1, b=>2, c=>3' % ARRAY['c','b','aa'];
-select pg_column_size(hstore 'aa=>1, b=>2, c=>3' % ARRAY['c','b'])
+-- slice()
+select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['g','h','i']);
+select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b']);
+select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['aa','b']);
+select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b','aa']);
+select pg_column_size(slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b']))
          = pg_column_size('b=>2, c=>3'::hstore);
-select pg_column_size(hstore 'aa=>1, b=>2, c=>3' % ARRAY['c','b','aa'])
+select pg_column_size(slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b','aa']))
          = pg_column_size('aa=>1, b=>2, c=>3'::hstore);
 
 -- array input

contrib/hstore/uninstall_hstore.sql

-/* $PostgreSQL: pgsql/contrib/hstore/uninstall_hstore.sql,v 1.10 2010/06/18 03:52:02 rhaas Exp $ */
+/* $PostgreSQL: pgsql/contrib/hstore/uninstall_hstore.sql,v 1.11 2010/07/02 20:36:48 rhaas Exp $ */
 
 -- Adjust this setting to control where the objects get dropped.
 SET search_path = public;
@@ -22,7 +22,6 @@ DROP OPERATOR <@ ( hstore, hstore );
 DROP OPERATOR @  ( hstore, hstore );
 DROP OPERATOR ~  ( hstore, hstore );
 DROP OPERATOR => ( text, text );
-DROP OPERATOR % ( hstore, text[] );
 DROP OPERATOR #= ( anyelement, hstore );
 DROP OPERATOR %% ( NONE, hstore );
 DROP OPERATOR %# ( NONE, hstore );
@@ -44,7 +43,7 @@ DROP FUNCTION hstore_le(hstore,hstore);
 DROP FUNCTION hstore_cmp(hstore,hstore);
 DROP FUNCTION hstore_hash(hstore);
 DROP FUNCTION slice_array(hstore,text[]);
-DROP FUNCTION slice_hstore(hstore,text[]);
+DROP FUNCTION slice(hstore,text[]);
 DROP FUNCTION fetchval(hstore,text);
 DROP FUNCTION isexists(hstore,text);
 DROP FUNCTION exist(hstore,text);

doc/src/sgml/hstore.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/hstore.sgml,v 1.11 2010/06/22 11:36:16 rhaas Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/hstore.sgml,v 1.12 2010/07/02 20:36:49 rhaas Exp $ -->
 
 <sect1 id="hstore">
  <title>hstore</title>
@@ -120,13 +120,6 @@
       <entry><literal>"a"=&gt;"b"</literal></entry>
      </row>
 
-     <row>
-      <entry><type>hstore</> <literal>%</> <type>text[]</></entry>
-      <entry>extract a subset of an <type>hstore</></entry>
-      <entry><literal>'a=&gt;1,b=&gt;2,c=&gt;3'::hstore % ARRAY['b','c','x']</literal></entry>
-      <entry><literal>"b"=&gt;"2", "c"=&gt;"3"</literal></entry>
-     </row>
-
      <row>
       <entry><type>hstore</> <literal>||</> <type>hstore</></entry>
       <entry>concatenate <type>hstore</>s</entry>
@@ -338,6 +331,14 @@ b
       <entry><literal>{{a,1},{b,2}}</literal></entry>
      </row>
 
+     <row>
+      <entry><function>slice(hstore, text[])</function></entry>
+      <entry><type>hstore</type></entry>
+      <entry>extract a subset of an <type>hstore</></entry>
+      <entry><literal>slice('a=&gt;1,b=&gt;2,c=&gt;3'::hstore, ARRAY['b','c','x'])</literal></entry>
+      <entry><literal>"b"=&gt;"2", "c"=&gt;"3"</literal></entry>
+     </row>
+
      <row>
       <entry><function>each(hstore)</function></entry>
       <entry><type>setof(key text, value text)</type></entry>