CREATE EXTENSION hstore;
set escape_string_warning=off;
--hstore;
select ''::hstore;
 hstore 
--------
 
(1 row)

select 'a=>b'::hstore;
  hstore  
----------
 "a"=>"b"
(1 row)

select ' a=>b'::hstore;
  hstore  
----------
 "a"=>"b"
(1 row)

select 'a =>b'::hstore;
  hstore  
----------
 "a"=>"b"
(1 row)

select 'a=>b '::hstore;
  hstore  
----------
 "a"=>"b"
(1 row)

select 'a=> b'::hstore;
  hstore  
----------
 "a"=>"b"
(1 row)

select '"a"=>"b"'::hstore;
  hstore  
----------
 "a"=>"b"
(1 row)

select ' "a"=>"b"'::hstore;
  hstore  
----------
 "a"=>"b"
(1 row)

select '"a" =>"b"'::hstore;
  hstore  
----------
 "a"=>"b"
(1 row)

select '"a"=>"b" '::hstore;
  hstore  
----------
 "a"=>"b"
(1 row)

select '"a"=> "b"'::hstore;
  hstore  
----------
 "a"=>"b"
(1 row)

select 'aa=>bb'::hstore;
   hstore   
------------
 "aa"=>"bb"
(1 row)

select ' aa=>bb'::hstore;
   hstore   
------------
 "aa"=>"bb"
(1 row)

select 'aa =>bb'::hstore;
   hstore   
------------
 "aa"=>"bb"
(1 row)

select 'aa=>bb '::hstore;
   hstore   
------------
 "aa"=>"bb"
(1 row)

select 'aa=> bb'::hstore;
   hstore   
------------
 "aa"=>"bb"
(1 row)

select '"aa"=>"bb"'::hstore;
   hstore   
------------
 "aa"=>"bb"
(1 row)

select ' "aa"=>"bb"'::hstore;
   hstore   
------------
 "aa"=>"bb"
(1 row)

select '"aa" =>"bb"'::hstore;
   hstore   
------------
 "aa"=>"bb"
(1 row)

select '"aa"=>"bb" '::hstore;
   hstore   
------------
 "aa"=>"bb"
(1 row)

select '"aa"=> "bb"'::hstore;
   hstore   
------------
 "aa"=>"bb"
(1 row)

select 'aa=>bb, cc=>dd'::hstore;
         hstore         
------------------------
 "aa"=>"bb", "cc"=>"dd"
(1 row)

select 'aa=>bb , cc=>dd'::hstore;
         hstore         
------------------------
 "aa"=>"bb", "cc"=>"dd"
(1 row)

select 'aa=>bb ,cc=>dd'::hstore;
         hstore         
------------------------
 "aa"=>"bb", "cc"=>"dd"
(1 row)

select 'aa=>bb, "cc"=>dd'::hstore;
         hstore         
------------------------
 "aa"=>"bb", "cc"=>"dd"
(1 row)

select 'aa=>bb , "cc"=>dd'::hstore;
         hstore         
------------------------
 "aa"=>"bb", "cc"=>"dd"
(1 row)

select 'aa=>bb ,"cc"=>dd'::hstore;
         hstore         
------------------------
 "aa"=>"bb", "cc"=>"dd"
(1 row)

select 'aa=>"bb", cc=>dd'::hstore;
         hstore         
------------------------
 "aa"=>"bb", "cc"=>"dd"
(1 row)

select 'aa=>"bb" , cc=>dd'::hstore;
         hstore         
------------------------
 "aa"=>"bb", "cc"=>"dd"
(1 row)

select 'aa=>"bb" ,cc=>dd'::hstore;
         hstore         
------------------------
 "aa"=>"bb", "cc"=>"dd"
(1 row)

select 'aa=>null'::hstore;
   hstore   
------------
 "aa"=>NULL
(1 row)

select 'aa=>NuLl'::hstore;
   hstore   
------------
 "aa"=>NULL
(1 row)

select 'aa=>"NuLl"'::hstore;
    hstore    
--------------
 "aa"=>"NuLl"
(1 row)

select 'aa=>nul'::hstore;
   hstore    
-------------
 "aa"=>"nul"
(1 row)

select 'aa=>NuL'::hstore;
   hstore    
-------------
 "aa"=>"NuL"
(1 row)

select 'aa=>"NuL"'::hstore;
   hstore    
-------------
 "aa"=>"NuL"
(1 row)

select e'\\=a=>q=w'::hstore;
   hstore    
-------------
 "=a"=>"q=w"
(1 row)

select e'"=a"=>q\\=w'::hstore;
   hstore    
-------------
 "=a"=>"q=w"
(1 row)

select e'"\\"a"=>q>w'::hstore;
    hstore    
--------------
 "\"a"=>"q>w"
(1 row)

select e'\\"a=>q"w'::hstore;
    hstore     
---------------
 "\"a"=>"q\"w"
(1 row)

select ''::hstore;
 hstore 
--------
 
(1 row)

select '	'::hstore;
 hstore 
--------
 
(1 row)

-- -> operator
select 'aa=>b, c=>d , b=>16'::hstore->'c';
 ?column? 
----------
 d
(1 row)

select 'aa=>b, c=>d , b=>16'::hstore->'b';
 ?column? 
----------
 16
(1 row)

select 'aa=>b, c=>d , b=>16'::hstore->'aa';
 ?column? 
----------
 b
(1 row)

select ('aa=>b, c=>d , b=>16'::hstore->'gg') is null;
 ?column? 
----------
 t
(1 row)

select ('aa=>NULL, c=>d , b=>16'::hstore->'aa') is null;
 ?column? 
----------
 t
(1 row)

select ('aa=>"NULL", c=>d , b=>16'::hstore->'aa') is null;
 ?column? 
----------
 f
(1 row)

-- -> array operator
select 'aa=>"NULL", c=>d , b=>16'::hstore -> ARRAY['aa','c'];
  ?column?  
------------
 {"NULL",d}
(1 row)

select 'aa=>"NULL", c=>d , b=>16'::hstore -> ARRAY['c','aa'];
  ?column?  
------------
 {d,"NULL"}
(1 row)

select 'aa=>NULL, c=>d , b=>16'::hstore -> ARRAY['aa','c',null];
   ?column?    
---------------
 {NULL,d,NULL}
(1 row)

select 'aa=>1, c=>3, b=>2, d=>4'::hstore -> ARRAY[['b','d'],['aa','c']];
   ?column?    
---------------
 {{2,4},{1,3}}
(1 row)

-- exists/defined
select exist('a=>NULL, b=>qq', 'a');
 exist 
-------
 t
(1 row)

select exist('a=>NULL, b=>qq', 'b');
 exist 
-------
 t
(1 row)

select exist('a=>NULL, b=>qq', 'c');
 exist 
-------
 f
(1 row)

select exist('a=>"NULL", b=>qq', 'a');
 exist 
-------
 t
(1 row)

select defined('a=>NULL, b=>qq', 'a');
 defined 
---------
 f
(1 row)

select defined('a=>NULL, b=>qq', 'b');
 defined 
---------
 t
(1 row)

select defined('a=>NULL, b=>qq', 'c');
 defined 
---------
 f
(1 row)

select defined('a=>"NULL", b=>qq', 'a');
 defined 
---------
 t
(1 row)

select hstore 'a=>NULL, b=>qq' ? 'a';
 ?column? 
----------
 t
(1 row)

select hstore 'a=>NULL, b=>qq' ? 'b';
 ?column? 
----------
 t
(1 row)

select hstore 'a=>NULL, b=>qq' ? 'c';
 ?column? 
----------
 f
(1 row)

select hstore 'a=>"NULL", b=>qq' ? 'a';
 ?column? 
----------
 t
(1 row)

select hstore 'a=>NULL, b=>qq' ?| ARRAY['a','b'];
 ?column? 
----------
 t
(1 row)

select hstore 'a=>NULL, b=>qq' ?| ARRAY['b','a'];
 ?column? 
----------
 t
(1 row)

select hstore 'a=>NULL, b=>qq' ?| ARRAY['c','a'];
 ?column? 
----------
 t
(1 row)

select hstore 'a=>NULL, b=>qq' ?| ARRAY['c','d'];
 ?column? 
----------
 f
(1 row)

select hstore 'a=>NULL, b=>qq' ?| '{}'::text[];
 ?column? 
----------
 f
(1 row)

select hstore 'a=>NULL, b=>qq' ?& ARRAY['a','b'];
 ?column? 
----------
 t
(1 row)

select hstore 'a=>NULL, b=>qq' ?& ARRAY['b','a'];
 ?column? 
----------
 t
(1 row)

select hstore 'a=>NULL, b=>qq' ?& ARRAY['c','a'];
 ?column? 
----------
 f
(1 row)

select hstore 'a=>NULL, b=>qq' ?& ARRAY['c','d'];
 ?column? 
----------
 f
(1 row)

select hstore 'a=>NULL, b=>qq' ?& '{}'::text[];
 ?column? 
----------
 t
(1 row)

-- delete
select delete('a=>1 , b=>2, c=>3'::hstore, 'a');
     delete     
----------------
 "b"=>2, "c"=>3
(1 row)

select delete('a=>null , b=>2, c=>3'::hstore, 'a');
     delete     
----------------
 "b"=>2, "c"=>3
(1 row)

select delete('a=>1 , b=>2, c=>3'::hstore, 'b');
     delete     
----------------
 "a"=>1, "c"=>3
(1 row)

select delete('a=>1 , b=>2, c=>3'::hstore, 'c');
     delete     
----------------
 "a"=>1, "b"=>2
(1 row)

select delete('a=>1 , b=>2, c=>3'::hstore, 'd');
         delete         
------------------------
 "a"=>1, "b"=>2, "c"=>3
(1 row)

select 'a=>1 , b=>2, c=>3'::hstore - 'a'::text;
    ?column?    
----------------
 "b"=>2, "c"=>3
(1 row)

select 'a=>null , b=>2, c=>3'::hstore - 'a'::text;
    ?column?    
----------------
 "b"=>2, "c"=>3
(1 row)

select 'a=>1 , b=>2, c=>3'::hstore - 'b'::text;
    ?column?    
----------------
 "a"=>1, "c"=>3
(1 row)

select 'a=>1 , b=>2, c=>3'::hstore - 'c'::text;
    ?column?    
----------------
 "a"=>1, "b"=>2
(1 row)

select 'a=>1 , b=>2, c=>3'::hstore - 'd'::text;
        ?column?        
------------------------
 "a"=>1, "b"=>2, "c"=>3
(1 row)

select pg_column_size('a=>1 , b=>2, c=>3'::hstore - 'b'::text)
         = pg_column_size('a=>1, b=>2'::hstore);
 ?column? 
----------
 t
(1 row)

-- delete (array)
select delete('a=>1 , b=>2, c=>3'::hstore, ARRAY['d','e']);
         delete         
------------------------
 "a"=>1, "b"=>2, "c"=>3
(1 row)

select delete('a=>1 , b=>2, c=>3'::hstore, ARRAY['d','b']);
     delete     
----------------
 "a"=>1, "c"=>3
(1 row)

select delete('a=>1 , b=>2, c=>3'::hstore, ARRAY['a','c']);
 delete 
--------
 "b"=>2
(1 row)

select delete('a=>1 , b=>2, c=>3'::hstore, ARRAY[['b'],['c'],['a']]);
 delete 
--------
 
(1 row)

select delete('a=>1 , b=>2, c=>3'::hstore, '{}'::text[]);
         delete         
------------------------
 "a"=>1, "b"=>2, "c"=>3
(1 row)

select 'a=>1 , b=>2, c=>3'::hstore - ARRAY['d','e'];
        ?column?        
------------------------
 "a"=>1, "b"=>2, "c"=>3
(1 row)

select 'a=>1 , b=>2, c=>3'::hstore - ARRAY['d','b'];
    ?column?    
----------------
 "a"=>1, "c"=>3
(1 row)

select 'a=>1 , b=>2, c=>3'::hstore - ARRAY['a','c'];
 ?column? 
----------
 "b"=>2
(1 row)

select 'a=>1 , b=>2, c=>3'::hstore - ARRAY[['b'],['c'],['a']];
 ?column? 
----------
 
(1 row)

select 'a=>1 , b=>2, c=>3'::hstore - '{}'::text[];
        ?column?        
------------------------
 "a"=>1, "b"=>2, "c"=>3
(1 row)

select pg_column_size('a=>1 , b=>2, c=>3'::hstore - ARRAY['a','c'])
         = pg_column_size('b=>2'::hstore);
 ?column? 
----------
 t
(1 row)

select pg_column_size('a=>1 , b=>2, c=>3'::hstore - '{}'::text[])
         = pg_column_size('a=>1, b=>2, c=>3'::hstore);
 ?column? 
----------
 t
(1 row)

-- delete (hstore)
select delete('aa=>1 , b=>2, c=>3'::hstore, 'aa=>4, b=>2'::hstore);
     delete      
-----------------
 "c"=>3, "aa"=>1
(1 row)

select delete('aa=>1 , b=>2, c=>3'::hstore, 'aa=>NULL, c=>3'::hstore);
     delete      
-----------------
 "b"=>2, "aa"=>1
(1 row)

select delete('aa=>1 , b=>2, c=>3'::hstore, 'aa=>1, b=>2, c=>3'::hstore);
 delete 
--------
 
(1 row)

select delete('aa=>1 , b=>2, c=>3'::hstore, 'b=>2'::hstore);
     delete      
-----------------
 "c"=>3, "aa"=>1
(1 row)

select delete('aa=>1 , b=>2, c=>3'::hstore, ''::hstore);
         delete          
-------------------------
 "b"=>2, "c"=>3, "aa"=>1
(1 row)

select 'aa=>1 , b=>2, c=>3'::hstore - 'aa=>4, b=>2'::hstore;
    ?column?     
-----------------
 "c"=>3, "aa"=>1
(1 row)

select 'aa=>1 , b=>2, c=>3'::hstore - 'aa=>NULL, c=>3'::hstore;
    ?column?     
-----------------
 "b"=>2, "aa"=>1
(1 row)

select 'aa=>1 , b=>2, c=>3'::hstore - 'aa=>1, b=>2, c=>3'::hstore;
 ?column? 
----------
 
(1 row)

select 'aa=>1 , b=>2, c=>3'::hstore - 'b=>2'::hstore;
    ?column?     
-----------------
 "c"=>3, "aa"=>1
(1 row)

select 'aa=>1 , b=>2, c=>3'::hstore - ''::hstore;
        ?column?         
-------------------------
 "b"=>2, "c"=>3, "aa"=>1
(1 row)

select pg_column_size('a=>1 , b=>2, c=>3'::hstore - 'b=>2'::hstore)
         = pg_column_size('a=>1, c=>3'::hstore);
 ?column? 
----------
 t
(1 row)

select pg_column_size('a=>1 , b=>2, c=>3'::hstore - ''::hstore)
         = pg_column_size('a=>1, b=>2, c=>3'::hstore);
 ?column? 
----------
 t
(1 row)

-- ||
select 'aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>f';
               ?column?                
---------------------------------------
 "b"=>"g", "aa"=>1, "cq"=>"l", "fg"=>f
(1 row)

select 'aa=>1 , b=>2, cq=>3'::hstore || 'aq=>l';
              ?column?               
-------------------------------------
 "b"=>2, "aa"=>1, "aq"=>"l", "cq"=>3
(1 row)

select 'aa=>1 , b=>2, cq=>3'::hstore || 'aa=>l';
          ?column?          
----------------------------
 "b"=>2, "aa"=>"l", "cq"=>3
(1 row)

select 'aa=>1 , b=>2, cq=>3'::hstore || '';
         ?column?         
--------------------------
 "b"=>2, "aa"=>1, "cq"=>3
(1 row)

select ''::hstore || 'cq=>l, b=>g, fg=>f';
           ?column?           
------------------------------
 "b"=>"g", "cq"=>"l", "fg"=>f
(1 row)

select pg_column_size(''::hstore || ''::hstore) = pg_column_size(''::hstore);
 ?column? 
----------
 t
(1 row)

select pg_column_size('aa=>1'::hstore || 'b=>2'::hstore)
         = pg_column_size('aa=>1, b=>2'::hstore);
 ?column? 
----------
 t
(1 row)

select pg_column_size('aa=>1, b=>2'::hstore || ''::hstore)
         = pg_column_size('aa=>1, b=>2'::hstore);
 ?column? 
----------
 t
(1 row)

select pg_column_size(''::hstore || 'aa=>1, b=>2'::hstore)
         = pg_column_size('aa=>1, b=>2'::hstore);
 ?column? 
----------
 t
(1 row)

-- hstore(text,text)
select 'a=>g, b=>c'::hstore || hstore('asd', 'gf');
            ?column?             
---------------------------------
 "a"=>"g", "b"=>"c", "asd"=>"gf"
(1 row)

select 'a=>g, b=>c'::hstore || hstore('b', 'gf');
      ?column?       
---------------------
 "a"=>"g", "b"=>"gf"
(1 row)

select 'a=>g, b=>c'::hstore || hstore('b', 'NULL');
       ?column?        
-----------------------
 "a"=>"g", "b"=>"NULL"
(1 row)

select 'a=>g, b=>c'::hstore || hstore('b', NULL);
      ?column?       
---------------------
 "a"=>"g", "b"=>NULL
(1 row)

select ('a=>g, b=>c'::hstore || hstore(NULL, 'b')) is null;
 ?column? 
----------
 t
(1 row)

select pg_column_size(hstore('b', 'gf'))
         = pg_column_size('b=>gf'::hstore);
 ?column? 
----------
 t
(1 row)

select pg_column_size('a=>g, b=>c'::hstore || hstore('b', 'gf'))
         = pg_column_size('a=>g, b=>gf'::hstore);
 ?column? 
----------
 t
(1 row)

-- slice()
select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['g','h','i']);
 slice 
-------
 
(1 row)

select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b']);
     slice      
----------------
 "b"=>2, "c"=>3
(1 row)

select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['aa','b']);
      slice      
-----------------
 "b"=>2, "aa"=>1
(1 row)

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(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(slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b','aa']))
         = pg_column_size('aa=>1, b=>2, c=>3'::hstore);
 ?column? 
----------
 t
(1 row)

-- array input
select '{}'::text[]::hstore;
 hstore 
--------
 
(1 row)

select ARRAY['a','g','b','h','asd']::hstore;
ERROR:  array must have even number of elements
select ARRAY['a','g','b','h','asd','i']::hstore;
             array              
--------------------------------
 "a"=>"g", "b"=>"h", "asd"=>"i"
(1 row)

select ARRAY[['a','g'],['b','h'],['asd','i']]::hstore;
             array              
--------------------------------
 "a"=>"g", "b"=>"h", "asd"=>"i"
(1 row)

select ARRAY[['a','g','b'],['h','asd','i']]::hstore;
ERROR:  array must have two columns
select ARRAY[[['a','g'],['b','h'],['asd','i']]]::hstore;
ERROR:  wrong number of array subscripts
select hstore('{}'::text[]);
 hstore 
--------
 
(1 row)

select hstore(ARRAY['a','g','b','h','asd']);
ERROR:  array must have even number of elements
select hstore(ARRAY['a','g','b','h','asd','i']);
             hstore             
--------------------------------
 "a"=>"g", "b"=>"h", "asd"=>"i"
(1 row)

select hstore(ARRAY[['a','g'],['b','h'],['asd','i']]);
             hstore             
--------------------------------
 "a"=>"g", "b"=>"h", "asd"=>"i"
(1 row)

select hstore(ARRAY[['a','g','b'],['h','asd','i']]);
ERROR:  array must have two columns
select hstore(ARRAY[[['a','g'],['b','h'],['asd','i']]]);
ERROR:  wrong number of array subscripts
select hstore('[0:5]={a,g,b,h,asd,i}'::text[]);
             hstore             
--------------------------------
 "a"=>"g", "b"=>"h", "asd"=>"i"
(1 row)

select hstore('[0:2][1:2]={{a,g},{b,h},{asd,i}}'::text[]);
             hstore             
--------------------------------
 "a"=>"g", "b"=>"h", "asd"=>"i"
(1 row)

-- pairs of arrays
select hstore(ARRAY['a','b','asd'], ARRAY['g','h','i']);
             hstore             
--------------------------------
 "a"=>"g", "b"=>"h", "asd"=>"i"
(1 row)

select hstore(ARRAY['a','b','asd'], ARRAY['g','h',NULL]);
             hstore              
---------------------------------
 "a"=>"g", "b"=>"h", "asd"=>NULL
(1 row)

select hstore(ARRAY['z','y','x'], ARRAY['1','2','3']);
            hstore            
------------------------------
 "x"=>"3", "y"=>"2", "z"=>"1"
(1 row)

select hstore(ARRAY['aaa','bb','c','d'], ARRAY[null::text,null,null,null]);
                    hstore                     
-----------------------------------------------
 "c"=>NULL, "d"=>NULL, "bb"=>NULL, "aaa"=>NULL
(1 row)

select hstore(ARRAY['aaa','bb','c','d'], null);
                    hstore                     
-----------------------------------------------
 "c"=>NULL, "d"=>NULL, "bb"=>NULL, "aaa"=>NULL
(1 row)

select quote_literal(hstore('{}'::text[], '{}'::text[]));
 quote_literal 
---------------
 ''
(1 row)

select quote_literal(hstore('{}'::text[], null));
 quote_literal 
---------------
 ''
(1 row)

select hstore(ARRAY['a'], '{}'::text[]);  -- error
ERROR:  arrays must have same bounds
select hstore('{}'::text[], ARRAY['a']);  -- error
ERROR:  arrays must have same bounds
select pg_column_size(hstore(ARRAY['a','b','asd'], ARRAY['g','h','i']))
         = pg_column_size('a=>g, b=>h, asd=>i'::hstore);
 ?column? 
----------
 t
(1 row)

-- records
select hstore(v) from (values (1, 'foo', 1.2, 3::float8)) v(a,b,c,d);
                hstore                
--------------------------------------
 "a"=>1, "b"=>"foo", "c"=>1.2, "d"=>3
(1 row)

create domain hstestdom1 as integer not null default 0;
create table testhstore0 (a integer, b text, c numeric, d float8);
create table testhstore1 (a integer, b text, c numeric, d float8, e hstestdom1);
insert into testhstore0 values (1, 'foo', 1.2, 3::float8);
insert into testhstore1 values (1, 'foo', 1.2, 3::float8);
select hstore(v) from testhstore1 v;
                    hstore                    
----------------------------------------------
 "a"=>1, "b"=>"foo", "c"=>1.2, "d"=>3, "e"=>0
(1 row)

select hstore(null::testhstore0);
                   hstore                   
--------------------------------------------
 "a"=>NULL, "b"=>NULL, "c"=>NULL, "d"=>NULL
(1 row)

select hstore(null::testhstore1);
                        hstore                         
-------------------------------------------------------
 "a"=>NULL, "b"=>NULL, "c"=>NULL, "d"=>NULL, "e"=>NULL
(1 row)

select pg_column_size(hstore(v))
         = pg_column_size('a=>1, b=>"foo", c=>1.2, d=>3, e=>0'::hstore)
  from testhstore1 v;
 ?column? 
----------
 t
(1 row)

select populate_record(v, hstore('c', '3.45')) from testhstore1 v;
 populate_record  
------------------
 (1,foo,3.45,3,0)
(1 row)

select populate_record(v, hstore('d', '3.45')) from testhstore1 v;
  populate_record   
--------------------
 (1,foo,1.2,3.45,0)
(1 row)

select populate_record(v, hstore('e', '123')) from testhstore1 v;
  populate_record  
-------------------
 (1,foo,1.2,3,123)
(1 row)

select populate_record(v, hstore('e', null)) from testhstore1 v;
ERROR:  domain hstestdom1 does not allow null values
select populate_record(v, hstore('c', null)) from testhstore1 v;
 populate_record 
-----------------
 (1,foo,,3,0)
(1 row)

select populate_record(v, hstore('b', 'foo') || hstore('a', '123')) from testhstore1 v;
  populate_record  
-------------------
 (123,foo,1.2,3,0)
(1 row)

select populate_record(v, hstore('b', 'foo') || hstore('e', null)) from testhstore0 v;
 populate_record 
-----------------
 (1,foo,1.2,3)
(1 row)

select populate_record(v, hstore('b', 'foo') || hstore('e', null)) from testhstore1 v;
ERROR:  domain hstestdom1 does not allow null values
select populate_record(v, '') from testhstore0 v;
 populate_record 
-----------------
 (1,foo,1.2,3)
(1 row)

select populate_record(v, '') from testhstore1 v;
 populate_record 
-----------------
 (1,foo,1.2,3,0)
(1 row)

select populate_record(null::testhstore1, hstore('c', '3.45') || hstore('a', '123'));
ERROR:  domain hstestdom1 does not allow null values
select populate_record(null::testhstore1, hstore('c', '3.45') || hstore('e', '123'));
 populate_record 
-----------------
 (,,3.45,,123)
(1 row)

select populate_record(null::testhstore0, '');
 populate_record 
-----------------
 (,,,)
(1 row)

select populate_record(null::testhstore1, '');
ERROR:  domain hstestdom1 does not allow null values
select v #= hstore('c', '3.45') from testhstore1 v;
     ?column?     
------------------
 (1,foo,3.45,3,0)
(1 row)

select v #= hstore('d', '3.45') from testhstore1 v;
      ?column?      
--------------------
 (1,foo,1.2,3.45,0)
(1 row)

select v #= hstore('e', '123') from testhstore1 v;
     ?column?      
-------------------
 (1,foo,1.2,3,123)
(1 row)

select v #= hstore('c', null) from testhstore1 v;
   ?column?   
--------------
 (1,foo,,3,0)
(1 row)

select v #= hstore('e', null) from testhstore0 v;
   ?column?    
---------------
 (1,foo,1.2,3)
(1 row)

select v #= hstore('e', null) from testhstore1 v;
ERROR:  domain hstestdom1 does not allow null values
select v #= (hstore('b', 'foo') || hstore('a', '123')) from testhstore1 v;
     ?column?      
-------------------
 (123,foo,1.2,3,0)
(1 row)

select v #= (hstore('b', 'foo') || hstore('e', '123')) from testhstore1 v;
     ?column?      
-------------------
 (1,foo,1.2,3,123)
(1 row)

select v #= hstore '' from testhstore0 v;
   ?column?    
---------------
 (1,foo,1.2,3)
(1 row)

select v #= hstore '' from testhstore1 v;
    ?column?     
-----------------
 (1,foo,1.2,3,0)
(1 row)

select null::testhstore1 #= (hstore('c', '3.45') || hstore('a', '123'));
ERROR:  domain hstestdom1 does not allow null values
select null::testhstore1 #= (hstore('c', '3.45') || hstore('e', '123'));
   ?column?    
---------------
 (,,3.45,,123)
(1 row)

select null::testhstore0 #= hstore '';
 ?column? 
----------
 (,,,)
(1 row)

select null::testhstore1 #= hstore '';
ERROR:  domain hstestdom1 does not allow null values
select v #= h from testhstore1 v, (values (hstore 'a=>123',1),('b=>foo,c=>3.21',2),('a=>null',3),('e=>123',4),('f=>blah',5)) x(h,i) order by i;
     ?column?      
-------------------
 (123,foo,1.2,3,0)
 (1,foo,3.21,3,0)
 (,foo,1.2,3,0)
 (1,foo,1.2,3,123)
 (1,foo,1.2,3,0)
(5 rows)

-- keys/values
select akeys('aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>f');
    akeys     
--------------
 {b,aa,cq,fg}
(1 row)

select akeys('""=>1');
 akeys 
-------
 {""}
(1 row)

select akeys('');
 akeys 
-------
 {}
(1 row)

select avals('aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>f');
   avals   
-----------
 {g,1,l,f}
(1 row)

select avals('aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>NULL');
    avals     
--------------
 {g,1,l,NULL}
(1 row)

select avals('""=>1');
 avals 
-------
 {1}
(1 row)

select avals('');
 avals 
-------
 {}
(1 row)

select hstore_to_array('aa=>1, cq=>l, b=>g, fg=>NULL'::hstore);
     hstore_to_array     
-------------------------
 {b,g,aa,1,cq,l,fg,NULL}
(1 row)

select %% 'aa=>1, cq=>l, b=>g, fg=>NULL';
        ?column?         
-------------------------
 {b,g,aa,1,cq,l,fg,NULL}
(1 row)

select hstore_to_matrix('aa=>1, cq=>l, b=>g, fg=>NULL'::hstore);
        hstore_to_matrix         
---------------------------------
 {{b,g},{aa,1},{cq,l},{fg,NULL}}
(1 row)

select %# 'aa=>1, cq=>l, b=>g, fg=>NULL';
            ?column?             
---------------------------------
 {{b,g},{aa,1},{cq,l},{fg,NULL}}
(1 row)

select * from skeys('aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>f');
 skeys 
-------
 b
 aa
 cq
 fg
(4 rows)

select * from skeys('""=>1');
 skeys 
-------
 
(1 row)

select * from skeys('');
 skeys 
-------
(0 rows)

select * from svals('aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>f');
 svals 
-------
 g
 1
 l
 f
(4 rows)

select *, svals is null from svals('aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>NULL');
 svals | ?column? 
-------+----------
 g     | f
 1     | f
 l     | f
       | t
(4 rows)

select * from svals('""=>1');
 svals 
-------
 1
(1 row)

select * from svals('');
 svals 
-------
(0 rows)

select * from each('aaa=>bq, b=>NULL, ""=>1 ');
 key | value 
-----+-------
     | 1
 b   | 
 aaa | bq
(3 rows)

-- @>
select 'a=>b, b=>1, c=>NULL'::hstore @> 'a=>b';
 ?column? 
----------
 t
(1 row)

select 'a=>b, b=>1, c=>NULL'::hstore @> 'a=>b, c=>NULL';
 ?column? 
----------
 t
(1 row)

select 'a=>b, b=>1, c=>NULL'::hstore @> 'a=>b, g=>NULL';
 ?column? 
----------
 f
(1 row)

select 'a=>b, b=>1, c=>NULL'::hstore @> 'g=>NULL';
 ?column? 
----------
 f
(1 row)

select 'a=>b, b=>1, c=>NULL'::hstore @> 'a=>c';
 ?column? 
----------
 f
(1 row)

select 'a=>b, b=>1, c=>NULL'::hstore @> 'a=>b';
 ?column? 
----------
 t
(1 row)

select 'a=>b, b=>1, c=>NULL'::hstore @> 'a=>b, c=>q';
 ?column? 
----------
 f
(1 row)

CREATE TABLE testhstore (h hstore);
\copy testhstore from 'data/hstore.data'
select count(*) from testhstore where h @> 'wait=>NULL';
 count 
-------
     1
(1 row)

select count(*) from testhstore where h @> 'wait=>CC';
 count 
-------
    15
(1 row)

select count(*) from testhstore where h @> 'wait=>CC, public=>t';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h @> 'age=>25';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h @> 'age=>25.0';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h @> 'age=>+25.00';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h ? 'public';
 count 
-------
   194
(1 row)

select count(*) from testhstore where h ?| ARRAY['public','disabled'];
 count 
-------
   337
(1 row)

select count(*) from testhstore where h ?& ARRAY['public','disabled'];
 count 
-------
    42
(1 row)

create index hidx on testhstore using gist(h);
set enable_seqscan=off;
select count(*) from testhstore where h @> 'wait=>NULL';
 count 
-------
     1
(1 row)

select count(*) from testhstore where h @> 'wait=>CC';
 count 
-------
    15
(1 row)

select count(*) from testhstore where h @> 'wait=>CC, public=>t';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h @> 'age=>25';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h @> 'age=>25.0';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h @> 'age=>+25.00';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h ? 'public';
 count 
-------
   194
(1 row)

select count(*) from testhstore where h ?| ARRAY['public','disabled'];
 count 
-------
   337
(1 row)

select count(*) from testhstore where h ?& ARRAY['public','disabled'];
 count 
-------
    42
(1 row)

RESET enable_seqscan;
drop index hidx;
create index hidx on testhstore using gin (h);
set enable_seqscan=off;
select count(*) from testhstore where h @> 'wait=>NULL';
 count 
-------
     1
(1 row)

select count(*) from testhstore where h @> 'wait=>CC';
 count 
-------
    15
(1 row)

select count(*) from testhstore where h @> 'wait=>CC, public=>t';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h @> 'age=>25';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h @> 'age=>25.0';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h @> 'age=>+25.00';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h ? 'public';
 count 
-------
   194
(1 row)

select count(*) from testhstore where h ?| ARRAY['public','disabled'];
 count 
-------
   337
(1 row)

select count(*) from testhstore where h ?& ARRAY['public','disabled'];
 count 
-------
    42
(1 row)

RESET enable_seqscan;
select count(*) from (select (each(h)).key from testhstore) as wow ;
 count 
-------
  4783
(1 row)

select key, count(*) from (select (each(h)).key from testhstore) as wow group by key order by count desc, key;
    key    | count 
-----------+-------
 line      |   884
 query     |   207
 pos       |   203
 node      |   202
 space     |   197
 status    |   195
 public    |   194
 title     |   190
 wait      |   190
 org       |   189
 user      |   189
 coauthors |   188
 disabled  |   185
 indexed   |   184
 cleaned   |   180
 bad       |   179
 date      |   179
 world     |   176
 state     |   172
 subtitle  |   169
 auth      |   168
 abstract  |   161
 age       |     2
(23 rows)

-- sort/hash
select count(distinct h) from testhstore;
 count 
-------
   886
(1 row)

set enable_hashagg = false;
select count(*) from (select h from (select * from testhstore union all select * from testhstore) hs group by h) hs2;
 count 
-------
   886
(1 row)

set enable_hashagg = true;
set enable_sort = false;
select count(*) from (select h from (select * from testhstore union all select * from testhstore) hs group by h) hs2;
 count 
-------
   886
(1 row)

select distinct * from (values (hstore '' || ''),('')) v(h);
 h 
---
 
(1 row)

set enable_sort = true;
RESET enable_hashagg;
RESET enable_sort;
-- btree
drop index hidx;
create index hidx on testhstore using btree (h);
set enable_seqscan=off;
select count(*) from testhstore where h #># 'p=>1';
 count 
-------
   886
(1 row)

select count(*) from testhstore where h = 'pos=>98, line=>371, node=>CBA, indexed=>t';
 count 
-------
     1
(1 row)

--gin hash
drop index hidx;
create index hidx on testhstore using gin (h gin_hstore_hash_ops);
set enable_seqscan=off;
select count(*) from testhstore where h @> 'wait=>NULL';
 count 
-------
     1
(1 row)

select count(*) from testhstore where h @> 'wait=>CC';
 count 
-------
    15
(1 row)

select count(*) from testhstore where h @> 'wait=>CC, public=>t';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h @> 'age=>25';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h @> 'age=>25.0';
 count 
-------
     2
(1 row)

select count(*) from testhstore where h @> 'age=>+25.00';
 count 
-------
     2
(1 row)

RESET enable_seqscan;
drop index hidx;
-- json
select hstore_to_json('"a key" =>1, b => t, c => null, d=> 12345, e => 012345, f=> 1.234, g=> 2.345e+4');
                                   hstore_to_json                                   
------------------------------------------------------------------------------------
 {"b": true, "c": null, "d": 12345, "e": 12345, "f": 1.234, "g": 23450, "a key": 1}
(1 row)

select cast( hstore  '"a key" =>1, b => t, c => null, d=> 12345, e => 012345, f=> 1.234, g=> 2.345e+4' as json);
                                        json                                        
------------------------------------------------------------------------------------
 {"b": true, "c": null, "d": 12345, "e": 12345, "f": 1.234, "g": 23450, "a key": 1}
(1 row)

select hstore_to_json_loose('"a key" =>1, b => t, c => null, d=> 12345, e => 012345, f=> 1.234, g=> 2.345e+4');
                                hstore_to_json_loose                                
------------------------------------------------------------------------------------
 {"b": true, "c": null, "d": 12345, "e": 12345, "f": 1.234, "g": 23450, "a key": 1}
(1 row)

create table test_json_agg (f1 text, f2 hstore);
insert into test_json_agg values ('rec1','"a key" =>1, b => t, c => null, d=> 12345, e => 012345, f=> 1.234, g=> 2.345e+4'),
       ('rec2','"a key" =>2, b => f, c => "null", d=> -12345, e => 012345.6, f=> -1.234, g=> 0.345e-4');
select json_agg(q) from test_json_agg q;
                                                      json_agg                                                      
--------------------------------------------------------------------------------------------------------------------
 [{"f1":"rec1","f2":{"b": true, "c": null, "d": 12345, "e": 12345, "f": 1.234, "g": 23450, "a key": 1}},           +
  {"f1":"rec2","f2":{"b": false, "c": "null", "d": -12345, "e": 12345.6, "f": -1.234, "g": 0.0000345, "a key": 2}}]
(1 row)

select json_agg(q) from (select f1, hstore_to_json_loose(f2) as f2 from test_json_agg) q;
                                                      json_agg                                                      
--------------------------------------------------------------------------------------------------------------------
 [{"f1":"rec1","f2":{"b": true, "c": null, "d": 12345, "e": 12345, "f": 1.234, "g": 23450, "a key": 1}},           +
  {"f1":"rec2","f2":{"b": false, "c": "null", "d": -12345, "e": 12345.6, "f": -1.234, "g": 0.0000345, "a key": 2}}]
(1 row)