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730840c9b6
expressions, ARRAY(sub-SELECT) expressions, some array functions. Polymorphic functions using ANYARRAY/ANYELEMENT argument and return types. Some regression tests in place, documentation is lacking. Joe Conway, with some kibitzing from Tom Lane.
159 lines
4.8 KiB
SQL
159 lines
4.8 KiB
SQL
--
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-- ARRAYS
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--
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CREATE TABLE arrtest (
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a int2[],
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b int4[][][],
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c name[],
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d text[][],
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e float8[],
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f char(5)[],
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g varchar(5)[]
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);
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--
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-- only this array as a 0-based 'e', the others are 1-based.
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-- 'e' is also a large object.
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--
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INSERT INTO arrtest (a[5], b[2][1][2], c, d, f, g)
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VALUES ('{1,2,3,4,5}', '{{{0,0},{1,2}}}', '{}', '{}', '{}', '{}');
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UPDATE arrtest SET e[0] = '1.1';
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UPDATE arrtest SET e[1] = '2.2';
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INSERT INTO arrtest (f)
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VALUES ('{"too long"}');
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INSERT INTO arrtest (a, b[2][2][1], c, d, e, f, g)
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VALUES ('{11,12,23}', '{{3,4},{4,5}}', '{"foobar"}',
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'{{"elt1", "elt2"}}', '{"3.4", "6.7"}',
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'{"abc","abcde"}', '{"abc","abcde"}');
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INSERT INTO arrtest (a, b[1][2][2], c, d[2][1])
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VALUES ('{}', '{3,4}', '{foo,bar}', '{bar,foo}');
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SELECT * FROM arrtest;
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SELECT arrtest.a[1],
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arrtest.b[1][1][1],
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arrtest.c[1],
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arrtest.d[1][1],
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arrtest.e[0]
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FROM arrtest;
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SELECT a[1], b[1][1][1], c[1], d[1][1], e[0]
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FROM arrtest;
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SELECT a[1:3],
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b[1:1][1:2][1:2],
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c[1:2],
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d[1:1][1:2]
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FROM arrtest;
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SELECT array_dims(a) AS a,array_dims(b) AS b,array_dims(c) AS c
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FROM arrtest;
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-- returns nothing
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SELECT *
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FROM arrtest
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WHERE a[1] < 5 and
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c = '{"foobar"}'::_name;
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UPDATE arrtest
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SET a[1:2] = '{16,25}'
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WHERE NOT a = '{}'::_int2;
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UPDATE arrtest
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SET b[1:1][1:1][1:2] = '{113, 117}',
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b[1:1][1:2][2:2] = '{142, 147}'
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WHERE array_dims(b) = '[1:1][1:2][1:2]';
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UPDATE arrtest
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SET c[2:2] = '{"new_word"}'
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WHERE array_dims(c) is not null;
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SELECT a,b,c FROM arrtest;
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SELECT a[1:3],
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b[1:1][1:2][1:2],
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c[1:2],
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d[1:1][2:2]
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FROM arrtest;
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--
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-- array expressions and operators
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--
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-- table creation and INSERTs
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CREATE TEMP TABLE arrtest2 (i integer ARRAY[4], f float8[], n numeric[], t text[], d timestamp[]);
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INSERT INTO arrtest2 VALUES(
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ARRAY[[[113,142],[1,147]]],
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ARRAY[1.1,1.2,1.3]::float8[],
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ARRAY[1.1,1.2,1.3],
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ARRAY[[['aaa','aab'],['aba','abb'],['aca','acb']],[['baa','bab'],['bba','bbb'],['bca','bcb']]],
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ARRAY['19620326','19931223','19970117']::timestamp[]
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);
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-- some more test data
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CREATE TEMP TABLE arrtest_f (f0 int, f1 text, f2 float8);
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insert into arrtest_f values(1,'cat1',1.21);
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insert into arrtest_f values(2,'cat1',1.24);
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insert into arrtest_f values(3,'cat1',1.18);
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insert into arrtest_f values(4,'cat1',1.26);
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insert into arrtest_f values(5,'cat1',1.15);
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insert into arrtest_f values(6,'cat2',1.15);
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insert into arrtest_f values(7,'cat2',1.26);
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insert into arrtest_f values(8,'cat2',1.32);
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insert into arrtest_f values(9,'cat2',1.30);
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CREATE TEMP TABLE arrtest_i (f0 int, f1 text, f2 int);
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insert into arrtest_i values(1,'cat1',21);
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insert into arrtest_i values(2,'cat1',24);
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insert into arrtest_i values(3,'cat1',18);
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insert into arrtest_i values(4,'cat1',26);
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insert into arrtest_i values(5,'cat1',15);
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insert into arrtest_i values(6,'cat2',15);
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insert into arrtest_i values(7,'cat2',26);
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insert into arrtest_i values(8,'cat2',32);
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insert into arrtest_i values(9,'cat2',30);
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-- expressions
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SELECT t.f[1][3][1] AS "131", t.f[2][2][1] AS "221" FROM (
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SELECT ARRAY[[[111,112],[121,122],[131,132]],[[211,212],[221,122],[231,232]]] AS f
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) AS t;
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SELECT ARRAY[[[[[['hello'],['world']]]]]];
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SELECT ARRAY[ARRAY['hello'],ARRAY['world']];
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SELECT ARRAY(select f2 from arrtest_f order by f2) AS "ARRAY";
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-- functions
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SELECT singleton_array(42) AS "{42}";
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SELECT array_append(singleton_array(42), 6) AS "{42,6}";
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SELECT array_prepend(6, singleton_array(42)) AS "{6,42}";
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SELECT array_cat(ARRAY[1,2], ARRAY[3,4]) AS "{{1,2},{3,4}}";
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SELECT array_cat(ARRAY[1,2], ARRAY[[3,4],[5,6]]) AS "{{1,2},{3,4},{5,6}}";
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SELECT array_cat(ARRAY[[3,4],[5,6]], ARRAY[1,2]) AS "{{3,4},{5,6},{1,2}}";
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SELECT array_subscript(n, 2) AS "1.2" FROM arrtest2;
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SELECT array_assign(n, 2, 9.99) AS "{1.1,9.99,1.3}" FROM arrtest2;
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SELECT array_subscript(array_assign(n, 2, 9.99), 2) AS "9.99" FROM arrtest2;
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-- operators
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SELECT a FROM arrtest WHERE b = ARRAY[[[113,142],[1,147]]];
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SELECT NOT ARRAY[1.1,1.2,1.3] = ARRAY[1.1,1.2,1.3] AS "FALSE";
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SELECT ARRAY[1,2] || 3 AS "{1,2,3}";
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SELECT 0 || ARRAY[1,2] AS "{0,1,2}";
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SELECT ARRAY[1,2] || ARRAY[3,4] AS "{{1,2},{3,4}}";
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SELECT ARRAY[[['hello','world']]] || ARRAY[[['happy','birthday']]] AS "ARRAY";
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SELECT ARRAY[[1,2],[3,4]] || ARRAY[5,6] AS "{{1,2},{3,4},{5,6}}";
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SELECT ARRAY[0,0] || ARRAY[1,1] || ARRAY[2,2] AS "{{0,0},{1,1},{2,2}}";
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SELECT 0 || ARRAY[1,2] || 3 AS "{0,1,2,3}";
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-- array casts
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SELECT ARRAY[1,2,3]::text[]::int[]::float8[] AS "{1,2,3}";
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SELECT ARRAY[1,2,3]::text[]::int[]::float8[] is of (float8[]) as "TRUE";
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SELECT ARRAY[['a','bc'],['def','hijk']]::text[]::varchar[] AS "{{a,bc},{def,hijk}}";
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SELECT ARRAY[['a','bc'],['def','hijk']]::text[]::varchar[] is of (varchar[]) as "TRUE";
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SELECT CAST(ARRAY[[[[[['a','bb','ccc']]]]]] as text[]) as "{{{{{{a,bb,ccc}}}}}}";
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