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This is basically a finger exercise to prove that it's possible for an extension module to add subscripting ability. Subscripted fetch from an hstore is not different from the existing "hstore -> text" operator. Subscripted update does seem to be a little easier to use than the traditional update method using hstore concatenation, but it's not a fundamentally new ability. However, there may be some value in the code as sample code, since it shows what's basically the minimum-complexity way to implement subscripting when one needn't consider nested container objects. Discussion: https://postgr.es/m/3724341.1607551174@sss.pgh.pa.us
383 lines
16 KiB
SQL
383 lines
16 KiB
SQL
CREATE EXTENSION hstore;
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-- Check whether any of our opclasses fail amvalidate
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SELECT amname, opcname
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FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
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WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
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set escape_string_warning=off;
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--hstore;
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select ''::hstore;
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select 'a=>b'::hstore;
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select ' a=>b'::hstore;
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select 'a =>b'::hstore;
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select 'a=>b '::hstore;
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select 'a=> b'::hstore;
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select '"a"=>"b"'::hstore;
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select ' "a"=>"b"'::hstore;
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select '"a" =>"b"'::hstore;
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select '"a"=>"b" '::hstore;
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select '"a"=> "b"'::hstore;
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select 'aa=>bb'::hstore;
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select ' aa=>bb'::hstore;
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select 'aa =>bb'::hstore;
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select 'aa=>bb '::hstore;
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select 'aa=> bb'::hstore;
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select '"aa"=>"bb"'::hstore;
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select ' "aa"=>"bb"'::hstore;
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select '"aa" =>"bb"'::hstore;
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select '"aa"=>"bb" '::hstore;
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select '"aa"=> "bb"'::hstore;
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select 'aa=>bb, cc=>dd'::hstore;
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select 'aa=>bb , cc=>dd'::hstore;
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select 'aa=>bb ,cc=>dd'::hstore;
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select 'aa=>bb, "cc"=>dd'::hstore;
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select 'aa=>bb , "cc"=>dd'::hstore;
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select 'aa=>bb ,"cc"=>dd'::hstore;
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select 'aa=>"bb", cc=>dd'::hstore;
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select 'aa=>"bb" , cc=>dd'::hstore;
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select 'aa=>"bb" ,cc=>dd'::hstore;
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select 'aa=>null'::hstore;
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select 'aa=>NuLl'::hstore;
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select 'aa=>"NuLl"'::hstore;
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select e'\\=a=>q=w'::hstore;
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select e'"=a"=>q\\=w'::hstore;
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select e'"\\"a"=>q>w'::hstore;
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select e'\\"a=>q"w'::hstore;
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select ''::hstore;
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select ' '::hstore;
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-- -> operator
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select 'aa=>b, c=>d , b=>16'::hstore->'c';
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select 'aa=>b, c=>d , b=>16'::hstore->'b';
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select 'aa=>b, c=>d , b=>16'::hstore->'aa';
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select ('aa=>b, c=>d , b=>16'::hstore->'gg') is null;
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select ('aa=>NULL, c=>d , b=>16'::hstore->'aa') is null;
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select ('aa=>"NULL", c=>d , b=>16'::hstore->'aa') is null;
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-- -> array operator
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select 'aa=>"NULL", c=>d , b=>16'::hstore -> ARRAY['aa','c'];
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select 'aa=>"NULL", c=>d , b=>16'::hstore -> ARRAY['c','aa'];
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select 'aa=>NULL, c=>d , b=>16'::hstore -> ARRAY['aa','c',null];
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select 'aa=>1, c=>3, b=>2, d=>4'::hstore -> ARRAY[['b','d'],['aa','c']];
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-- exists/defined
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select exist('a=>NULL, b=>qq', 'a');
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select exist('a=>NULL, b=>qq', 'b');
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select exist('a=>NULL, b=>qq', 'c');
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select exist('a=>"NULL", b=>qq', 'a');
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select defined('a=>NULL, b=>qq', 'a');
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select defined('a=>NULL, b=>qq', 'b');
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select defined('a=>NULL, b=>qq', 'c');
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select defined('a=>"NULL", b=>qq', 'a');
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select hstore 'a=>NULL, b=>qq' ? 'a';
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select hstore 'a=>NULL, b=>qq' ? 'b';
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select hstore 'a=>NULL, b=>qq' ? 'c';
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select hstore 'a=>"NULL", b=>qq' ? 'a';
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select hstore 'a=>NULL, b=>qq' ?| ARRAY['a','b'];
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select hstore 'a=>NULL, b=>qq' ?| ARRAY['b','a'];
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select hstore 'a=>NULL, b=>qq' ?| ARRAY['c','a'];
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select hstore 'a=>NULL, b=>qq' ?| ARRAY['c','d'];
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select hstore 'a=>NULL, b=>qq' ?| '{}'::text[];
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select hstore 'a=>NULL, b=>qq' ?& ARRAY['a','b'];
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select hstore 'a=>NULL, b=>qq' ?& ARRAY['b','a'];
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select hstore 'a=>NULL, b=>qq' ?& ARRAY['c','a'];
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select hstore 'a=>NULL, b=>qq' ?& ARRAY['c','d'];
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select hstore 'a=>NULL, b=>qq' ?& '{}'::text[];
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-- delete
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select delete('a=>1 , b=>2, c=>3'::hstore, 'a');
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select delete('a=>null , b=>2, c=>3'::hstore, 'a');
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select delete('a=>1 , b=>2, c=>3'::hstore, 'b');
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select delete('a=>1 , b=>2, c=>3'::hstore, 'c');
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select delete('a=>1 , b=>2, c=>3'::hstore, 'd');
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select 'a=>1 , b=>2, c=>3'::hstore - 'a'::text;
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select 'a=>null , b=>2, c=>3'::hstore - 'a'::text;
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select 'a=>1 , b=>2, c=>3'::hstore - 'b'::text;
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select 'a=>1 , b=>2, c=>3'::hstore - 'c'::text;
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select 'a=>1 , b=>2, c=>3'::hstore - 'd'::text;
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select pg_column_size('a=>1 , b=>2, c=>3'::hstore - 'b'::text)
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= pg_column_size('a=>1, b=>2'::hstore);
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-- delete (array)
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select delete('a=>1 , b=>2, c=>3'::hstore, ARRAY['d','e']);
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select delete('a=>1 , b=>2, c=>3'::hstore, ARRAY['d','b']);
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select delete('a=>1 , b=>2, c=>3'::hstore, ARRAY['a','c']);
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select delete('a=>1 , b=>2, c=>3'::hstore, ARRAY[['b'],['c'],['a']]);
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select delete('a=>1 , b=>2, c=>3'::hstore, '{}'::text[]);
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select 'a=>1 , b=>2, c=>3'::hstore - ARRAY['d','e'];
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select 'a=>1 , b=>2, c=>3'::hstore - ARRAY['d','b'];
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select 'a=>1 , b=>2, c=>3'::hstore - ARRAY['a','c'];
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select 'a=>1 , b=>2, c=>3'::hstore - ARRAY[['b'],['c'],['a']];
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select 'a=>1 , b=>2, c=>3'::hstore - '{}'::text[];
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select pg_column_size('a=>1 , b=>2, c=>3'::hstore - ARRAY['a','c'])
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= pg_column_size('b=>2'::hstore);
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select pg_column_size('a=>1 , b=>2, c=>3'::hstore - '{}'::text[])
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= pg_column_size('a=>1, b=>2, c=>3'::hstore);
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-- delete (hstore)
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select delete('aa=>1 , b=>2, c=>3'::hstore, 'aa=>4, b=>2'::hstore);
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select delete('aa=>1 , b=>2, c=>3'::hstore, 'aa=>NULL, c=>3'::hstore);
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select delete('aa=>1 , b=>2, c=>3'::hstore, 'aa=>1, b=>2, c=>3'::hstore);
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select delete('aa=>1 , b=>2, c=>3'::hstore, 'b=>2'::hstore);
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select delete('aa=>1 , b=>2, c=>3'::hstore, ''::hstore);
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select 'aa=>1 , b=>2, c=>3'::hstore - 'aa=>4, b=>2'::hstore;
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select 'aa=>1 , b=>2, c=>3'::hstore - 'aa=>NULL, c=>3'::hstore;
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select 'aa=>1 , b=>2, c=>3'::hstore - 'aa=>1, b=>2, c=>3'::hstore;
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select 'aa=>1 , b=>2, c=>3'::hstore - 'b=>2'::hstore;
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select 'aa=>1 , b=>2, c=>3'::hstore - ''::hstore;
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select pg_column_size('a=>1 , b=>2, c=>3'::hstore - 'b=>2'::hstore)
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= pg_column_size('a=>1, c=>3'::hstore);
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select pg_column_size('a=>1 , b=>2, c=>3'::hstore - ''::hstore)
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= pg_column_size('a=>1, b=>2, c=>3'::hstore);
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-- ||
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select 'aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>f';
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select 'aa=>1 , b=>2, cq=>3'::hstore || 'aq=>l';
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select 'aa=>1 , b=>2, cq=>3'::hstore || 'aa=>l';
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select 'aa=>1 , b=>2, cq=>3'::hstore || '';
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select ''::hstore || 'cq=>l, b=>g, fg=>f';
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select pg_column_size(''::hstore || ''::hstore) = pg_column_size(''::hstore);
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select pg_column_size('aa=>1'::hstore || 'b=>2'::hstore)
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= pg_column_size('aa=>1, b=>2'::hstore);
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select pg_column_size('aa=>1, b=>2'::hstore || ''::hstore)
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= pg_column_size('aa=>1, b=>2'::hstore);
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select pg_column_size(''::hstore || 'aa=>1, b=>2'::hstore)
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= pg_column_size('aa=>1, b=>2'::hstore);
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-- hstore(text,text)
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select 'a=>g, b=>c'::hstore || hstore('asd', 'gf');
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select 'a=>g, b=>c'::hstore || hstore('b', 'gf');
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select 'a=>g, b=>c'::hstore || hstore('b', 'NULL');
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select 'a=>g, b=>c'::hstore || hstore('b', NULL);
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select ('a=>g, b=>c'::hstore || hstore(NULL, 'b')) is null;
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select pg_column_size(hstore('b', 'gf'))
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= pg_column_size('b=>gf'::hstore);
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select pg_column_size('a=>g, b=>c'::hstore || hstore('b', 'gf'))
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= pg_column_size('a=>g, b=>gf'::hstore);
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-- slice()
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select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['g','h','i']);
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select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b']);
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select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['aa','b']);
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select slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b','aa']);
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select pg_column_size(slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b']))
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= pg_column_size('b=>2, c=>3'::hstore);
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select pg_column_size(slice(hstore 'aa=>1, b=>2, c=>3', ARRAY['c','b','aa']))
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= pg_column_size('aa=>1, b=>2, c=>3'::hstore);
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-- array input
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select '{}'::text[]::hstore;
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select ARRAY['a','g','b','h','asd']::hstore;
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select ARRAY['a','g','b','h','asd','i']::hstore;
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select ARRAY[['a','g'],['b','h'],['asd','i']]::hstore;
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select ARRAY[['a','g','b'],['h','asd','i']]::hstore;
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select ARRAY[[['a','g'],['b','h'],['asd','i']]]::hstore;
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select hstore('{}'::text[]);
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select hstore(ARRAY['a','g','b','h','asd']);
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select hstore(ARRAY['a','g','b','h','asd','i']);
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select hstore(ARRAY[['a','g'],['b','h'],['asd','i']]);
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select hstore(ARRAY[['a','g','b'],['h','asd','i']]);
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select hstore(ARRAY[[['a','g'],['b','h'],['asd','i']]]);
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select hstore('[0:5]={a,g,b,h,asd,i}'::text[]);
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select hstore('[0:2][1:2]={{a,g},{b,h},{asd,i}}'::text[]);
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-- pairs of arrays
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select hstore(ARRAY['a','b','asd'], ARRAY['g','h','i']);
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select hstore(ARRAY['a','b','asd'], ARRAY['g','h',NULL]);
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select hstore(ARRAY['z','y','x'], ARRAY['1','2','3']);
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select hstore(ARRAY['aaa','bb','c','d'], ARRAY[null::text,null,null,null]);
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select hstore(ARRAY['aaa','bb','c','d'], null);
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select quote_literal(hstore('{}'::text[], '{}'::text[]));
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select quote_literal(hstore('{}'::text[], null));
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select hstore(ARRAY['a'], '{}'::text[]); -- error
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select hstore('{}'::text[], ARRAY['a']); -- error
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select pg_column_size(hstore(ARRAY['a','b','asd'], ARRAY['g','h','i']))
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= pg_column_size('a=>g, b=>h, asd=>i'::hstore);
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-- records
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select hstore(v) from (values (1, 'foo', 1.2, 3::float8)) v(a,b,c,d);
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create domain hstestdom1 as integer not null default 0;
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create table testhstore0 (a integer, b text, c numeric, d float8);
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create table testhstore1 (a integer, b text, c numeric, d float8, e hstestdom1);
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insert into testhstore0 values (1, 'foo', 1.2, 3::float8);
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insert into testhstore1 values (1, 'foo', 1.2, 3::float8);
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select hstore(v) from testhstore1 v;
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select hstore(null::testhstore0);
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select hstore(null::testhstore1);
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select pg_column_size(hstore(v))
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= pg_column_size('a=>1, b=>"foo", c=>"1.2", d=>"3", e=>"0"'::hstore)
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from testhstore1 v;
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select populate_record(v, hstore('c', '3.45')) from testhstore1 v;
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select populate_record(v, hstore('d', '3.45')) from testhstore1 v;
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select populate_record(v, hstore('e', '123')) from testhstore1 v;
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select populate_record(v, hstore('e', null)) from testhstore1 v;
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select populate_record(v, hstore('c', null)) from testhstore1 v;
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select populate_record(v, hstore('b', 'foo') || hstore('a', '123')) from testhstore1 v;
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select populate_record(v, hstore('b', 'foo') || hstore('e', null)) from testhstore0 v;
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select populate_record(v, hstore('b', 'foo') || hstore('e', null)) from testhstore1 v;
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select populate_record(v, '') from testhstore0 v;
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select populate_record(v, '') from testhstore1 v;
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select populate_record(null::testhstore1, hstore('c', '3.45') || hstore('a', '123'));
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select populate_record(null::testhstore1, hstore('c', '3.45') || hstore('e', '123'));
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select populate_record(null::testhstore0, '');
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select populate_record(null::testhstore1, '');
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select v #= hstore('c', '3.45') from testhstore1 v;
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select v #= hstore('d', '3.45') from testhstore1 v;
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select v #= hstore('e', '123') from testhstore1 v;
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select v #= hstore('c', null) from testhstore1 v;
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select v #= hstore('e', null) from testhstore0 v;
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select v #= hstore('e', null) from testhstore1 v;
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select v #= (hstore('b', 'foo') || hstore('a', '123')) from testhstore1 v;
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select v #= (hstore('b', 'foo') || hstore('e', '123')) from testhstore1 v;
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select v #= hstore '' from testhstore0 v;
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select v #= hstore '' from testhstore1 v;
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select null::testhstore1 #= (hstore('c', '3.45') || hstore('a', '123'));
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select null::testhstore1 #= (hstore('c', '3.45') || hstore('e', '123'));
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select null::testhstore0 #= hstore '';
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select null::testhstore1 #= hstore '';
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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;
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-- keys/values
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select akeys('aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>f');
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select akeys('""=>1');
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select akeys('');
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select avals('aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>f');
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select avals('aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>NULL');
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select avals('""=>1');
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select avals('');
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select hstore_to_array('aa=>1, cq=>l, b=>g, fg=>NULL'::hstore);
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select %% 'aa=>1, cq=>l, b=>g, fg=>NULL';
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select hstore_to_matrix('aa=>1, cq=>l, b=>g, fg=>NULL'::hstore);
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select %# 'aa=>1, cq=>l, b=>g, fg=>NULL';
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select * from skeys('aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>f');
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select * from skeys('""=>1');
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select * from skeys('');
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select * from svals('aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>f');
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select *, svals is null from svals('aa=>1 , b=>2, cq=>3'::hstore || 'cq=>l, b=>g, fg=>NULL');
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select * from svals('""=>1');
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select * from svals('');
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select * from each('aaa=>bq, b=>NULL, ""=>1 ');
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-- @>
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select 'a=>b, b=>1, c=>NULL'::hstore @> 'a=>b';
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select 'a=>b, b=>1, c=>NULL'::hstore @> 'a=>b, c=>NULL';
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select 'a=>b, b=>1, c=>NULL'::hstore @> 'a=>b, g=>NULL';
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select 'a=>b, b=>1, c=>NULL'::hstore @> 'g=>NULL';
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select 'a=>b, b=>1, c=>NULL'::hstore @> 'a=>c';
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select 'a=>b, b=>1, c=>NULL'::hstore @> 'a=>b';
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select 'a=>b, b=>1, c=>NULL'::hstore @> 'a=>b, c=>q';
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CREATE TABLE testhstore (h hstore);
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\copy testhstore from 'data/hstore.data'
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select count(*) from testhstore where h @> 'wait=>NULL';
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select count(*) from testhstore where h @> 'wait=>CC';
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select count(*) from testhstore where h @> 'wait=>CC, public=>t';
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select count(*) from testhstore where h ? 'public';
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select count(*) from testhstore where h ?| ARRAY['public','disabled'];
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select count(*) from testhstore where h ?& ARRAY['public','disabled'];
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create index hidx on testhstore using gist(h);
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set enable_seqscan=off;
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select count(*) from testhstore where h @> 'wait=>NULL';
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select count(*) from testhstore where h @> 'wait=>CC';
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select count(*) from testhstore where h @> 'wait=>CC, public=>t';
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select count(*) from testhstore where h ? 'public';
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select count(*) from testhstore where h ?| ARRAY['public','disabled'];
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select count(*) from testhstore where h ?& ARRAY['public','disabled'];
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drop index hidx;
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create index hidx on testhstore using gist(h gist_hstore_ops(siglen=0));
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create index hidx on testhstore using gist(h gist_hstore_ops(siglen=2025));
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create index hidx on testhstore using gist(h gist_hstore_ops(siglen=2024));
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set enable_seqscan=off;
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select count(*) from testhstore where h @> 'wait=>NULL';
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select count(*) from testhstore where h @> 'wait=>CC';
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select count(*) from testhstore where h @> 'wait=>CC, public=>t';
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select count(*) from testhstore where h ? 'public';
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select count(*) from testhstore where h ?| ARRAY['public','disabled'];
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select count(*) from testhstore where h ?& ARRAY['public','disabled'];
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drop index hidx;
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create index hidx on testhstore using gin (h);
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set enable_seqscan=off;
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select count(*) from testhstore where h @> 'wait=>NULL';
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select count(*) from testhstore where h @> 'wait=>CC';
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select count(*) from testhstore where h @> 'wait=>CC, public=>t';
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select count(*) from testhstore where h ? 'public';
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select count(*) from testhstore where h ?| ARRAY['public','disabled'];
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select count(*) from testhstore where h ?& ARRAY['public','disabled'];
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select count(*) from (select (each(h)).key from testhstore) as wow ;
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select key, count(*) from (select (each(h)).key from testhstore) as wow group by key order by count desc, key;
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-- sort/hash
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select count(distinct h) from testhstore;
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set enable_hashagg = false;
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select count(*) from (select h from (select * from testhstore union all select * from testhstore) hs group by h) hs2;
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set enable_hashagg = true;
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set enable_sort = false;
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select count(*) from (select h from (select * from testhstore union all select * from testhstore) hs group by h) hs2;
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select distinct * from (values (hstore '' || ''),('')) v(h);
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set enable_sort = true;
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|
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-- btree
|
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drop index hidx;
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create index hidx on testhstore using btree (h);
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set enable_seqscan=off;
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|
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select count(*) from testhstore where h #># 'p=>1';
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select count(*) from testhstore where h = 'pos=>98, line=>371, node=>CBA, indexed=>t';
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|
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-- json and jsonb
|
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select hstore_to_json('"a key" =>1, b => t, c => null, d=> 12345, e => 012345, f=> 1.234, g=> 2.345e+4');
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select cast( hstore '"a key" =>1, b => t, c => null, d=> 12345, e => 012345, f=> 1.234, g=> 2.345e+4' as json);
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select hstore_to_json_loose('"a key" =>1, b => t, c => null, d=> 12345, e => 012345, f=> 1.234, g=> 2.345e+4, h=> "2016-01-01"');
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|
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select hstore_to_jsonb('"a key" =>1, b => t, c => null, d=> 12345, e => 012345, f=> 1.234, g=> 2.345e+4');
|
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select cast( hstore '"a key" =>1, b => t, c => null, d=> 12345, e => 012345, f=> 1.234, g=> 2.345e+4' as jsonb);
|
|
select hstore_to_jsonb_loose('"a key" =>1, b => t, c => null, d=> 12345, e => 012345, f=> 1.234, g=> 2.345e+4, h=> "2016-01-01"');
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|
|
|
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;
|
|
select json_agg(q) from (select f1, hstore_to_json_loose(f2) as f2 from test_json_agg) q;
|
|
|
|
-- Test subscripting
|
|
insert into test_json_agg default values;
|
|
select f2['d'], f2['x'] is null as x_isnull from test_json_agg;
|
|
select f2['d']['e'] from test_json_agg; -- error
|
|
select f2['d':'e'] from test_json_agg; -- error
|
|
update test_json_agg set f2['d'] = f2['e'], f2['x'] = 'xyzzy';
|
|
select f2 from test_json_agg;
|
|
|
|
-- Check the hstore_hash() and hstore_hash_extended() function explicitly.
|
|
SELECT v as value, hstore_hash(v)::bit(32) as standard,
|
|
hstore_hash_extended(v, 0)::bit(32) as extended0,
|
|
hstore_hash_extended(v, 1)::bit(32) as extended1
|
|
FROM (VALUES (NULL::hstore), (''), ('"a key" =>1'), ('c => null'),
|
|
('e => 012345'), ('g => 2.345e+4')) x(v)
|
|
WHERE hstore_hash(v)::bit(32) != hstore_hash_extended(v, 0)::bit(32)
|
|
OR hstore_hash(v)::bit(32) = hstore_hash_extended(v, 1)::bit(32);
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