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0e5e167aae
This patch improves selectivity estimation for the array <@, &&, and @> (containment and overlaps) operators. It enables collection of statistics about individual array element values by ANALYZE, and introduces operator-specific estimators that use these stats. In addition, ScalarArrayOpExpr constructs of the forms "const = ANY/ALL (array_column)" and "const <> ANY/ALL (array_column)" are estimated by treating them as variants of the containment operators. Since we still collect scalar-style stats about the array values as a whole, the pg_stats view is expanded to show both these stats and the array-style stats in separate columns. This creates an incompatible change in how stats for tsvector columns are displayed in pg_stats: the stats about lexemes are now displayed in the array-related columns instead of the original scalar-related columns. There are a few loose ends here, notably that it'd be nice to be able to suppress either the scalar-style stats or the array-element stats for columns for which they're not useful. But the patch is in good enough shape to commit for wider testing. Alexander Korotkov, reviewed by Noah Misch and Nathan Boley
443 lines
15 KiB
PL/PgSQL
443 lines
15 KiB
PL/PgSQL
--
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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 the 'e' array is 0-based, the others are 1-based.
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--
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INSERT INTO arrtest (a[1:5], b[1:1][1:2][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[1:2][1:2], 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], c, d[1:2])
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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_ndims(a) AS a,array_ndims(b) AS b,array_ndims(c) AS c
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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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INSERT INTO arrtest(a) VALUES('{1,null,3}');
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SELECT a FROM arrtest;
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UPDATE arrtest SET a[4] = NULL WHERE a[2] IS NULL;
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SELECT a FROM arrtest WHERE a[2] IS NULL;
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DELETE FROM arrtest WHERE a[2] IS NULL AND b IS NULL;
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SELECT a,b,c FROM arrtest;
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--
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-- test array extension
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--
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CREATE TEMP TABLE arrtest1 (i int[], t text[]);
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insert into arrtest1 values(array[1,2,null,4], array['one','two',null,'four']);
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select * from arrtest1;
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update arrtest1 set i[2] = 22, t[2] = 'twenty-two';
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select * from arrtest1;
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update arrtest1 set i[5] = 5, t[5] = 'five';
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select * from arrtest1;
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update arrtest1 set i[8] = 8, t[8] = 'eight';
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select * from arrtest1;
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update arrtest1 set i[0] = 0, t[0] = 'zero';
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select * from arrtest1;
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update arrtest1 set i[-3] = -3, t[-3] = 'minus-three';
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select * from arrtest1;
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update arrtest1 set i[0:2] = array[10,11,12], t[0:2] = array['ten','eleven','twelve'];
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select * from arrtest1;
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update arrtest1 set i[8:10] = array[18,null,20], t[8:10] = array['p18',null,'p20'];
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select * from arrtest1;
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update arrtest1 set i[11:12] = array[null,22], t[11:12] = array[null,'p22'];
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select * from arrtest1;
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update arrtest1 set i[15:16] = array[null,26], t[15:16] = array[null,'p26'];
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select * from arrtest1;
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update arrtest1 set i[-5:-3] = array[-15,-14,-13], t[-5:-3] = array['m15','m14','m13'];
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select * from arrtest1;
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update arrtest1 set i[-7:-6] = array[-17,null], t[-7:-6] = array['m17',null];
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select * from arrtest1;
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update arrtest1 set i[-12:-10] = array[-22,null,-20], t[-12:-10] = array['m22',null,'m20'];
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select * from arrtest1;
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delete from arrtest1;
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insert into arrtest1 values(array[1,2,null,4], array['one','two',null,'four']);
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select * from arrtest1;
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update arrtest1 set i[0:5] = array[0,1,2,null,4,5], t[0:5] = array['z','p1','p2',null,'p4','p5'];
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select * from arrtest1;
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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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-- with nulls
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SELECT '{1,null,3}'::int[];
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SELECT ARRAY[1,NULL,3];
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-- functions
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SELECT array_append(array[42], 6) AS "{42,6}";
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SELECT array_prepend(6, 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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-- 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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ANALYZE array_op_test;
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SELECT * FROM array_op_test WHERE i @> '{32}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i && '{32}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i @> '{17}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i && '{17}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i @> '{32,17}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i && '{32,17}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i <@ '{38,34,32,89}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i = '{}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i @> '{}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i && '{}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i <@ '{}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i = '{NULL}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i @> '{NULL}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i && '{NULL}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE i <@ '{NULL}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE t @> '{AAAAAAAA72908}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE t && '{AAAAAAAA72908}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE t @> '{AAAAAAAAAA646}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE t && '{AAAAAAAAAA646}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE t @> '{AAAAAAAA72908,AAAAAAAAAA646}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE t && '{AAAAAAAA72908,AAAAAAAAAA646}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE t <@ '{AAAAAAAA72908,AAAAAAAAAAAAAAAAAAA17075,AA88409,AAAAAAAAAAAAAAAAAA36842,AAAAAAA48038,AAAAAAAAAAAAAA10611}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE t = '{}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE t @> '{}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE t && '{}' ORDER BY seqno;
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SELECT * FROM array_op_test WHERE t <@ '{}' ORDER BY seqno;
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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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-- scalar op any/all (array)
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select 33 = any ('{1,2,3}');
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select 33 = any ('{1,2,33}');
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select 33 = all ('{1,2,33}');
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select 33 >= all ('{1,2,33}');
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-- boundary cases
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select null::int >= all ('{1,2,33}');
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select null::int >= all ('{}');
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select null::int >= any ('{}');
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-- cross-datatype
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select 33.4 = any (array[1,2,3]);
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select 33.4 > all (array[1,2,3]);
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-- errors
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select 33 * any ('{1,2,3}');
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select 33 * any (44);
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-- nulls
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select 33 = any (null::int[]);
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select null::int = any ('{1,2,3}');
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select 33 = any ('{1,null,3}');
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select 33 = any ('{1,null,33}');
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select 33 = all (null::int[]);
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select null::int = all ('{1,2,3}');
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select 33 = all ('{1,null,3}');
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select 33 = all ('{33,null,33}');
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-- test indexes on arrays
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create temp table arr_tbl (f1 int[] unique);
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insert into arr_tbl values ('{1,2,3}');
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insert into arr_tbl values ('{1,2}');
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-- failure expected:
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insert into arr_tbl values ('{1,2,3}');
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insert into arr_tbl values ('{2,3,4}');
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insert into arr_tbl values ('{1,5,3}');
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insert into arr_tbl values ('{1,2,10}');
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set enable_seqscan to off;
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set enable_bitmapscan to off;
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select * from arr_tbl where f1 > '{1,2,3}' and f1 <= '{1,5,3}';
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select * from arr_tbl where f1 >= '{1,2,3}' and f1 < '{1,5,3}';
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-- note: if above selects don't produce the expected tuple order,
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-- then you didn't get an indexscan plan, and something is busted.
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reset enable_seqscan;
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reset enable_bitmapscan;
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-- test [not] (like|ilike) (any|all) (...)
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select 'foo' like any (array['%a', '%o']); -- t
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select 'foo' like any (array['%a', '%b']); -- f
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select 'foo' like all (array['f%', '%o']); -- t
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select 'foo' like all (array['f%', '%b']); -- f
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select 'foo' not like any (array['%a', '%b']); -- t
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select 'foo' not like all (array['%a', '%o']); -- f
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select 'foo' ilike any (array['%A', '%O']); -- t
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select 'foo' ilike all (array['F%', '%O']); -- t
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--
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-- General array parser tests
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--
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-- none of the following should be accepted
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select '{{1,{2}},{2,3}}'::text[];
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select '{{},{}}'::text[];
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select E'{{1,2},\\{2,3}}'::text[];
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select '{{"1 2" x},{3}}'::text[];
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select '{}}'::text[];
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select '{ }}'::text[];
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select array[];
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-- none of the above should be accepted
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-- all of the following should be accepted
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select '{}'::text[];
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select '{{{1,2,3,4},{2,3,4,5}},{{3,4,5,6},{4,5,6,7}}}'::text[];
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select '{0 second ,0 second}'::interval[];
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select '{ { "," } , { 3 } }'::text[];
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select ' { { " 0 second " , 0 second } }'::text[];
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select '{
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0 second,
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@ 1 hour @ 42 minutes @ 20 seconds
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}'::interval[];
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select array[]::text[];
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select '[0:1]={1.1,2.2}'::float8[];
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-- all of the above should be accepted
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-- tests for array aggregates
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CREATE TEMP TABLE arraggtest ( f1 INT[], f2 TEXT[][], f3 FLOAT[]);
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INSERT INTO arraggtest (f1, f2, f3) VALUES
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('{1,2,3,4}','{{grey,red},{blue,blue}}','{1.6, 0.0}');
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INSERT INTO arraggtest (f1, f2, f3) VALUES
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('{1,2,3}','{{grey,red},{grey,blue}}','{1.6}');
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SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
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INSERT INTO arraggtest (f1, f2, f3) VALUES
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('{3,3,2,4,5,6}','{{white,yellow},{pink,orange}}','{2.1,3.3,1.8,1.7,1.6}');
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SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
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INSERT INTO arraggtest (f1, f2, f3) VALUES
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('{2}','{{black,red},{green,orange}}','{1.6,2.2,2.6,0.4}');
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SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
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INSERT INTO arraggtest (f1, f2, f3) VALUES
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('{4,2,6,7,8,1}','{{red},{black},{purple},{blue},{blue}}',NULL);
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SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
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INSERT INTO arraggtest (f1, f2, f3) VALUES
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('{}','{{pink,white,blue,red,grey,orange}}','{2.1,1.87,1.4,2.2}');
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SELECT max(f1), min(f1), max(f2), min(f2), max(f3), min(f3) FROM arraggtest;
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-- A few simple tests for arrays of composite types
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create type comptype as (f1 int, f2 text);
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create table comptable (c1 comptype, c2 comptype[]);
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-- XXX would like to not have to specify row() construct types here ...
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insert into comptable
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values (row(1,'foo'), array[row(2,'bar')::comptype, row(3,'baz')::comptype]);
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-- check that implicitly named array type _comptype isn't a problem
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create type _comptype as enum('fooey');
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select * from comptable;
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select c2[2].f2 from comptable;
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drop type _comptype;
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drop table comptable;
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drop type comptype;
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create or replace function unnest1(anyarray)
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returns setof anyelement as $$
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select $1[s] from generate_subscripts($1,1) g(s);
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$$ language sql immutable;
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create or replace function unnest2(anyarray)
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returns setof anyelement as $$
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select $1[s1][s2] from generate_subscripts($1,1) g1(s1),
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generate_subscripts($1,2) g2(s2);
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$$ language sql immutable;
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select * from unnest1(array[1,2,3]);
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select * from unnest2(array[[1,2,3],[4,5,6]]);
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drop function unnest1(anyarray);
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drop function unnest2(anyarray);
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select array_fill(null::integer, array[3,3],array[2,2]);
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select array_fill(null::integer, array[3,3]);
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select array_fill(null::text, array[3,3],array[2,2]);
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select array_fill(null::text, array[3,3]);
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select array_fill(7, array[3,3],array[2,2]);
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select array_fill(7, array[3,3]);
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select array_fill('juhu'::text, array[3,3],array[2,2]);
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select array_fill('juhu'::text, array[3,3]);
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-- raise exception
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select array_fill(1, null, array[2,2]);
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select array_fill(1, array[2,2], null);
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select array_fill(1, array[3,3], array[1,1,1]);
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select array_fill(1, array[1,2,null]);
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select string_to_array('1|2|3', '|');
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select string_to_array('1|2|3|', '|');
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select string_to_array('1||2|3||', '||');
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select string_to_array('1|2|3', '');
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select string_to_array('', '|');
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select string_to_array('1|2|3', NULL);
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select string_to_array(NULL, '|') IS NULL;
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select string_to_array('abc', '');
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select string_to_array('abc', '', 'abc');
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select string_to_array('abc', ',');
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select string_to_array('abc', ',', 'abc');
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select string_to_array('1,2,3,4,,6', ',');
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select string_to_array('1,2,3,4,,6', ',', '');
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select string_to_array('1,2,3,4,*,6', ',', '*');
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select array_to_string(NULL::int4[], ',') IS NULL;
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select array_to_string('{}'::int4[], ',');
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select array_to_string(array[1,2,3,4,NULL,6], ',');
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select array_to_string(array[1,2,3,4,NULL,6], ',', '*');
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select array_to_string(array[1,2,3,4,NULL,6], NULL);
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select array_to_string(array[1,2,3,4,NULL,6], ',', NULL);
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select array_to_string(string_to_array('1|2|3', '|'), '|');
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select array_length(array[1,2,3], 1);
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select array_length(array[[1,2,3], [4,5,6]], 0);
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select array_length(array[[1,2,3], [4,5,6]], 1);
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select array_length(array[[1,2,3], [4,5,6]], 2);
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select array_length(array[[1,2,3], [4,5,6]], 3);
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select array_agg(unique1) from (select unique1 from tenk1 where unique1 < 15 order by unique1) ss;
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select array_agg(ten) from (select ten from tenk1 where unique1 < 15 order by unique1) ss;
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select array_agg(nullif(ten, 4)) from (select ten from tenk1 where unique1 < 15 order by unique1) ss;
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select array_agg(unique1) from tenk1 where unique1 < -15;
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select unnest(array[1,2,3]);
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select * from unnest(array[1,2,3]);
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select unnest(array[1,2,3,4.5]::float8[]);
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select unnest(array[1,2,3,4.5]::numeric[]);
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select unnest(array[1,2,3,null,4,null,null,5,6]);
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select unnest(array[1,2,3,null,4,null,null,5,6]::text[]);
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-- Insert/update on a column that is array of composite
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create temp table t1 (f1 int8_tbl[]);
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insert into t1 (f1[5].q1) values(42);
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select * from t1;
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update t1 set f1[5].q2 = 43;
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select * from t1;
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