-- -- ARRAYS -- CREATE TABLE arrtest ( a int2[], b int4[][][], c name[], d text[][], e float8[], f char(5)[], g varchar(5)[] ); -- -- only this array as a 0-based 'e', the others are 1-based. -- 'e' is also a large object. -- INSERT INTO arrtest (a[5], b[2][1][2], c, d, f, g) VALUES ('{1,2,3,4,5}', '{{{0,0},{1,2}}}', '{}', '{}', '{}', '{}'); UPDATE arrtest SET e[0] = '1.1'; UPDATE arrtest SET e[1] = '2.2'; INSERT INTO arrtest (f) VALUES ('{"too long"}'); INSERT INTO arrtest (a, b[2][2][1], c, d, e, f, g) VALUES ('{11,12,23}', '{{3,4},{4,5}}', '{"foobar"}', '{{"elt1", "elt2"}}', '{"3.4", "6.7"}', '{"abc","abcde"}', '{"abc","abcde"}'); INSERT INTO arrtest (a, b[1][2][2], c, d[2][1]) VALUES ('{}', '{3,4}', '{foo,bar}', '{bar,foo}'); SELECT * FROM arrtest; SELECT arrtest.a[1], arrtest.b[1][1][1], arrtest.c[1], arrtest.d[1][1], arrtest.e[0] FROM arrtest; SELECT a[1], b[1][1][1], c[1], d[1][1], e[0] FROM arrtest; SELECT a[1:3], b[1:1][1:2][1:2], c[1:2], d[1:1][1:2] FROM arrtest; SELECT array_dims(a) AS a,array_dims(b) AS b,array_dims(c) AS c FROM arrtest; -- returns nothing SELECT * FROM arrtest WHERE a[1] < 5 and c = '{"foobar"}'::_name; UPDATE arrtest SET a[1:2] = '{16,25}' WHERE NOT a = '{}'::_int2; UPDATE arrtest SET b[1:1][1:1][1:2] = '{113, 117}', b[1:1][1:2][2:2] = '{142, 147}' WHERE array_dims(b) = '[1:1][1:2][1:2]'; UPDATE arrtest SET c[2:2] = '{"new_word"}' WHERE array_dims(c) is not null; SELECT a,b,c FROM arrtest; SELECT a[1:3], b[1:1][1:2][1:2], c[1:2], d[1:1][2:2] FROM arrtest; -- -- array expressions and operators -- -- table creation and INSERTs CREATE TEMP TABLE arrtest2 (i integer ARRAY[4], f float8[], n numeric[], t text[], d timestamp[]); INSERT INTO arrtest2 VALUES( ARRAY[[[113,142],[1,147]]], ARRAY[1.1,1.2,1.3]::float8[], ARRAY[1.1,1.2,1.3], ARRAY[[['aaa','aab'],['aba','abb'],['aca','acb']],[['baa','bab'],['bba','bbb'],['bca','bcb']]], ARRAY['19620326','19931223','19970117']::timestamp[] ); -- some more test data CREATE TEMP TABLE arrtest_f (f0 int, f1 text, f2 float8); insert into arrtest_f values(1,'cat1',1.21); insert into arrtest_f values(2,'cat1',1.24); insert into arrtest_f values(3,'cat1',1.18); insert into arrtest_f values(4,'cat1',1.26); insert into arrtest_f values(5,'cat1',1.15); insert into arrtest_f values(6,'cat2',1.15); insert into arrtest_f values(7,'cat2',1.26); insert into arrtest_f values(8,'cat2',1.32); insert into arrtest_f values(9,'cat2',1.30); CREATE TEMP TABLE arrtest_i (f0 int, f1 text, f2 int); insert into arrtest_i values(1,'cat1',21); insert into arrtest_i values(2,'cat1',24); insert into arrtest_i values(3,'cat1',18); insert into arrtest_i values(4,'cat1',26); insert into arrtest_i values(5,'cat1',15); insert into arrtest_i values(6,'cat2',15); insert into arrtest_i values(7,'cat2',26); insert into arrtest_i values(8,'cat2',32); insert into arrtest_i values(9,'cat2',30); -- expressions SELECT t.f[1][3][1] AS "131", t.f[2][2][1] AS "221" FROM ( SELECT ARRAY[[[111,112],[121,122],[131,132]],[[211,212],[221,122],[231,232]]] AS f ) AS t; SELECT ARRAY[[[[[['hello'],['world']]]]]]; SELECT ARRAY[ARRAY['hello'],ARRAY['world']]; SELECT ARRAY(select f2 from arrtest_f order by f2) AS "ARRAY"; -- functions SELECT array_append(array[42], 6) AS "{42,6}"; SELECT array_prepend(6, array[42]) AS "{6,42}"; SELECT array_cat(ARRAY[1,2], ARRAY[3,4]) AS "{1,2,3,4}"; SELECT array_cat(ARRAY[1,2], ARRAY[[3,4],[5,6]]) AS "{{1,2},{3,4},{5,6}}"; SELECT array_cat(ARRAY[[3,4],[5,6]], ARRAY[1,2]) AS "{{3,4},{5,6},{1,2}}"; -- operators SELECT a FROM arrtest WHERE b = ARRAY[[[113,142],[1,147]]]; SELECT NOT ARRAY[1.1,1.2,1.3] = ARRAY[1.1,1.2,1.3] AS "FALSE"; SELECT ARRAY[1,2] || 3 AS "{1,2,3}"; SELECT 0 || ARRAY[1,2] AS "{0,1,2}"; SELECT ARRAY[1,2] || ARRAY[3,4] AS "{1,2,3,4}"; SELECT ARRAY[[['hello','world']]] || ARRAY[[['happy','birthday']]] AS "ARRAY"; SELECT ARRAY[[1,2],[3,4]] || ARRAY[5,6] AS "{{1,2},{3,4},{5,6}}"; SELECT ARRAY[0,0] || ARRAY[1,1] || ARRAY[2,2] AS "{0,0,1,1,2,2}"; SELECT 0 || ARRAY[1,2] || 3 AS "{0,1,2,3}"; -- array casts SELECT ARRAY[1,2,3]::text[]::int[]::float8[] AS "{1,2,3}"; SELECT ARRAY[1,2,3]::text[]::int[]::float8[] is of (float8[]) as "TRUE"; SELECT ARRAY[['a','bc'],['def','hijk']]::text[]::varchar[] AS "{{a,bc},{def,hijk}}"; SELECT ARRAY[['a','bc'],['def','hijk']]::text[]::varchar[] is of (varchar[]) as "TRUE"; SELECT CAST(ARRAY[[[[[['a','bb','ccc']]]]]] as text[]) as "{{{{{{a,bb,ccc}}}}}}"; -- scalar op any/all (array) select 33 = any ('{1,2,3}'); select 33 = any ('{1,2,33}'); select 33 = all ('{1,2,33}'); select 33 >= all ('{1,2,33}'); -- boundary cases select null::int >= all ('{1,2,33}'); select null::int >= all ('{}'); select null::int >= any ('{}'); -- cross-datatype select 33.4 = any (array[1,2,3]); select 33.4 > all (array[1,2,3]); -- errors select 33 * any ('{1,2,3}'); select 33 * any (44); -- test indexes on arrays create temp table arr_tbl (f1 int[] unique); insert into arr_tbl values ('{1,2,3}'); insert into arr_tbl values ('{1,2}'); -- failure expected: insert into arr_tbl values ('{1,2,3}'); insert into arr_tbl values ('{2,3,4}'); insert into arr_tbl values ('{1,5,3}'); insert into arr_tbl values ('{1,2,10}'); set enable_seqscan to off; select * from arr_tbl where f1 > '{1,2,3}' and f1 <= '{1,5,3}'; -- note: if above select doesn't produce the expected tuple order, -- then you didn't get an indexscan plan, and something is busted.