1492 lines
50 KiB
Plaintext
1492 lines
50 KiB
Plaintext
--
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-- Test inheritance features
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--
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CREATE TABLE a (aa TEXT);
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CREATE TABLE b (bb TEXT) INHERITS (a);
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CREATE TABLE c (cc TEXT) INHERITS (a);
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CREATE TABLE d (dd TEXT) INHERITS (b,c,a);
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NOTICE: merging multiple inherited definitions of column "aa"
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NOTICE: merging multiple inherited definitions of column "aa"
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INSERT INTO a(aa) VALUES('aaa');
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INSERT INTO a(aa) VALUES('aaaa');
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INSERT INTO a(aa) VALUES('aaaaa');
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INSERT INTO a(aa) VALUES('aaaaaa');
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INSERT INTO a(aa) VALUES('aaaaaaa');
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INSERT INTO a(aa) VALUES('aaaaaaaa');
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INSERT INTO b(aa) VALUES('bbb');
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INSERT INTO b(aa) VALUES('bbbb');
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INSERT INTO b(aa) VALUES('bbbbb');
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INSERT INTO b(aa) VALUES('bbbbbb');
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INSERT INTO b(aa) VALUES('bbbbbbb');
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INSERT INTO b(aa) VALUES('bbbbbbbb');
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INSERT INTO c(aa) VALUES('ccc');
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INSERT INTO c(aa) VALUES('cccc');
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INSERT INTO c(aa) VALUES('ccccc');
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INSERT INTO c(aa) VALUES('cccccc');
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INSERT INTO c(aa) VALUES('ccccccc');
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INSERT INTO c(aa) VALUES('cccccccc');
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INSERT INTO d(aa) VALUES('ddd');
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INSERT INTO d(aa) VALUES('dddd');
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INSERT INTO d(aa) VALUES('ddddd');
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INSERT INTO d(aa) VALUES('dddddd');
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INSERT INTO d(aa) VALUES('ddddddd');
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INSERT INTO d(aa) VALUES('dddddddd');
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SELECT relname, a.* FROM a, pg_class where a.tableoid = pg_class.oid;
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relname | aa
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---------+----------
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a | aaa
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a | aaaa
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a | aaaaa
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a | aaaaaa
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a | aaaaaaa
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a | aaaaaaaa
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b | bbb
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b | bbbb
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b | bbbbb
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b | bbbbbb
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b | bbbbbbb
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b | bbbbbbbb
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c | ccc
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c | cccc
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c | ccccc
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c | cccccc
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c | ccccccc
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c | cccccccc
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d | ddd
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d | dddd
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d | ddddd
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d | dddddd
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d | ddddddd
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d | dddddddd
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(24 rows)
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SELECT relname, b.* FROM b, pg_class where b.tableoid = pg_class.oid;
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relname | aa | bb
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---------+----------+----
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b | bbb |
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b | bbbb |
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b | bbbbb |
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b | bbbbbb |
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b | bbbbbbb |
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b | bbbbbbbb |
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d | ddd |
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d | dddd |
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d | ddddd |
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d | dddddd |
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d | ddddddd |
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d | dddddddd |
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(12 rows)
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SELECT relname, c.* FROM c, pg_class where c.tableoid = pg_class.oid;
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relname | aa | cc
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---------+----------+----
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c | ccc |
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c | cccc |
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c | ccccc |
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c | cccccc |
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c | ccccccc |
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c | cccccccc |
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d | ddd |
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d | dddd |
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d | ddddd |
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d | dddddd |
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d | ddddddd |
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d | dddddddd |
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(12 rows)
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SELECT relname, d.* FROM d, pg_class where d.tableoid = pg_class.oid;
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relname | aa | bb | cc | dd
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---------+----------+----+----+----
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d | ddd | | |
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d | dddd | | |
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d | ddddd | | |
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d | dddddd | | |
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d | ddddddd | | |
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d | dddddddd | | |
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(6 rows)
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SELECT relname, a.* FROM ONLY a, pg_class where a.tableoid = pg_class.oid;
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relname | aa
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---------+----------
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a | aaa
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a | aaaa
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a | aaaaa
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a | aaaaaa
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a | aaaaaaa
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a | aaaaaaaa
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(6 rows)
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SELECT relname, b.* FROM ONLY b, pg_class where b.tableoid = pg_class.oid;
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relname | aa | bb
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---------+----------+----
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b | bbb |
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b | bbbb |
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b | bbbbb |
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b | bbbbbb |
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b | bbbbbbb |
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b | bbbbbbbb |
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(6 rows)
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SELECT relname, c.* FROM ONLY c, pg_class where c.tableoid = pg_class.oid;
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relname | aa | cc
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---------+----------+----
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c | ccc |
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c | cccc |
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c | ccccc |
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c | cccccc |
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c | ccccccc |
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c | cccccccc |
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(6 rows)
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SELECT relname, d.* FROM ONLY d, pg_class where d.tableoid = pg_class.oid;
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relname | aa | bb | cc | dd
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---------+----------+----+----+----
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d | ddd | | |
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d | dddd | | |
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d | ddddd | | |
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d | dddddd | | |
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d | ddddddd | | |
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d | dddddddd | | |
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(6 rows)
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UPDATE a SET aa='zzzz' WHERE aa='aaaa';
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UPDATE ONLY a SET aa='zzzzz' WHERE aa='aaaaa';
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UPDATE b SET aa='zzz' WHERE aa='aaa';
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UPDATE ONLY b SET aa='zzz' WHERE aa='aaa';
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UPDATE a SET aa='zzzzzz' WHERE aa LIKE 'aaa%';
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SELECT relname, a.* FROM a, pg_class where a.tableoid = pg_class.oid;
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relname | aa
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---------+----------
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a | zzzz
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a | zzzzz
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a | zzzzzz
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a | zzzzzz
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a | zzzzzz
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a | zzzzzz
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b | bbb
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b | bbbb
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b | bbbbb
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b | bbbbbb
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b | bbbbbbb
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b | bbbbbbbb
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c | ccc
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c | cccc
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c | ccccc
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c | cccccc
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c | ccccccc
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c | cccccccc
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d | ddd
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d | dddd
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d | ddddd
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d | dddddd
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d | ddddddd
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d | dddddddd
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(24 rows)
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SELECT relname, b.* FROM b, pg_class where b.tableoid = pg_class.oid;
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relname | aa | bb
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---------+----------+----
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b | bbb |
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b | bbbb |
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b | bbbbb |
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b | bbbbbb |
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b | bbbbbbb |
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b | bbbbbbbb |
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d | ddd |
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d | dddd |
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d | ddddd |
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d | dddddd |
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d | ddddddd |
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d | dddddddd |
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(12 rows)
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SELECT relname, c.* FROM c, pg_class where c.tableoid = pg_class.oid;
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relname | aa | cc
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---------+----------+----
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c | ccc |
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c | cccc |
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c | ccccc |
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c | cccccc |
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c | ccccccc |
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c | cccccccc |
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d | ddd |
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d | dddd |
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d | ddddd |
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d | dddddd |
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d | ddddddd |
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d | dddddddd |
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(12 rows)
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SELECT relname, d.* FROM d, pg_class where d.tableoid = pg_class.oid;
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relname | aa | bb | cc | dd
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---------+----------+----+----+----
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d | ddd | | |
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d | dddd | | |
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d | ddddd | | |
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d | dddddd | | |
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d | ddddddd | | |
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d | dddddddd | | |
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(6 rows)
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SELECT relname, a.* FROM ONLY a, pg_class where a.tableoid = pg_class.oid;
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relname | aa
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---------+--------
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a | zzzz
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a | zzzzz
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a | zzzzzz
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a | zzzzzz
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a | zzzzzz
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a | zzzzzz
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(6 rows)
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SELECT relname, b.* FROM ONLY b, pg_class where b.tableoid = pg_class.oid;
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relname | aa | bb
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---------+----------+----
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b | bbb |
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b | bbbb |
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b | bbbbb |
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b | bbbbbb |
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b | bbbbbbb |
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b | bbbbbbbb |
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(6 rows)
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SELECT relname, c.* FROM ONLY c, pg_class where c.tableoid = pg_class.oid;
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relname | aa | cc
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---------+----------+----
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c | ccc |
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c | cccc |
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c | ccccc |
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c | cccccc |
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c | ccccccc |
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c | cccccccc |
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(6 rows)
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SELECT relname, d.* FROM ONLY d, pg_class where d.tableoid = pg_class.oid;
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relname | aa | bb | cc | dd
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---------+----------+----+----+----
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d | ddd | | |
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d | dddd | | |
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d | ddddd | | |
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d | dddddd | | |
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d | ddddddd | | |
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d | dddddddd | | |
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(6 rows)
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UPDATE b SET aa='new';
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SELECT relname, a.* FROM a, pg_class where a.tableoid = pg_class.oid;
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relname | aa
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---------+----------
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a | zzzz
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a | zzzzz
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a | zzzzzz
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a | zzzzzz
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a | zzzzzz
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a | zzzzzz
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b | new
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b | new
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b | new
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b | new
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b | new
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b | new
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c | ccc
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c | cccc
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c | ccccc
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c | cccccc
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c | ccccccc
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c | cccccccc
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d | new
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d | new
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d | new
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d | new
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d | new
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d | new
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(24 rows)
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SELECT relname, b.* FROM b, pg_class where b.tableoid = pg_class.oid;
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relname | aa | bb
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---------+-----+----
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b | new |
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b | new |
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b | new |
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b | new |
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b | new |
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b | new |
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d | new |
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d | new |
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d | new |
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d | new |
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d | new |
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d | new |
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(12 rows)
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SELECT relname, c.* FROM c, pg_class where c.tableoid = pg_class.oid;
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relname | aa | cc
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---------+----------+----
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c | ccc |
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c | cccc |
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c | ccccc |
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c | cccccc |
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c | ccccccc |
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c | cccccccc |
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d | new |
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d | new |
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d | new |
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d | new |
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d | new |
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d | new |
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(12 rows)
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SELECT relname, d.* FROM d, pg_class where d.tableoid = pg_class.oid;
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relname | aa | bb | cc | dd
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---------+-----+----+----+----
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d | new | | |
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d | new | | |
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d | new | | |
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d | new | | |
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d | new | | |
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d | new | | |
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(6 rows)
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SELECT relname, a.* FROM ONLY a, pg_class where a.tableoid = pg_class.oid;
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relname | aa
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---------+--------
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a | zzzz
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a | zzzzz
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a | zzzzzz
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a | zzzzzz
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a | zzzzzz
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a | zzzzzz
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(6 rows)
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SELECT relname, b.* FROM ONLY b, pg_class where b.tableoid = pg_class.oid;
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relname | aa | bb
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---------+-----+----
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b | new |
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b | new |
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b | new |
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b | new |
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b | new |
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b | new |
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(6 rows)
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SELECT relname, c.* FROM ONLY c, pg_class where c.tableoid = pg_class.oid;
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relname | aa | cc
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---------+----------+----
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c | ccc |
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c | cccc |
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c | ccccc |
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c | cccccc |
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c | ccccccc |
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c | cccccccc |
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(6 rows)
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SELECT relname, d.* FROM ONLY d, pg_class where d.tableoid = pg_class.oid;
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relname | aa | bb | cc | dd
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---------+-----+----+----+----
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d | new | | |
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d | new | | |
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d | new | | |
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d | new | | |
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d | new | | |
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d | new | | |
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(6 rows)
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UPDATE a SET aa='new';
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DELETE FROM ONLY c WHERE aa='new';
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SELECT relname, a.* FROM a, pg_class where a.tableoid = pg_class.oid;
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relname | aa
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---------+-----
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a | new
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a | new
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a | new
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a | new
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a | new
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a | new
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b | new
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b | new
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b | new
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b | new
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b | new
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b | new
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d | new
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d | new
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d | new
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d | new
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d | new
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d | new
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(18 rows)
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SELECT relname, b.* FROM b, pg_class where b.tableoid = pg_class.oid;
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relname | aa | bb
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---------+-----+----
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b | new |
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b | new |
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b | new |
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b | new |
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b | new |
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b | new |
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d | new |
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d | new |
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d | new |
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d | new |
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d | new |
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d | new |
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(12 rows)
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SELECT relname, c.* FROM c, pg_class where c.tableoid = pg_class.oid;
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relname | aa | cc
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---------+-----+----
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d | new |
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d | new |
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d | new |
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d | new |
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d | new |
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d | new |
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(6 rows)
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SELECT relname, d.* FROM d, pg_class where d.tableoid = pg_class.oid;
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relname | aa | bb | cc | dd
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---------+-----+----+----+----
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d | new | | |
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d | new | | |
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d | new | | |
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d | new | | |
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d | new | | |
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d | new | | |
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(6 rows)
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SELECT relname, a.* FROM ONLY a, pg_class where a.tableoid = pg_class.oid;
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relname | aa
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---------+-----
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a | new
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a | new
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a | new
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a | new
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a | new
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a | new
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(6 rows)
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SELECT relname, b.* FROM ONLY b, pg_class where b.tableoid = pg_class.oid;
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relname | aa | bb
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---------+-----+----
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b | new |
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b | new |
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b | new |
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b | new |
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b | new |
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b | new |
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(6 rows)
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SELECT relname, c.* FROM ONLY c, pg_class where c.tableoid = pg_class.oid;
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relname | aa | cc
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---------+----+----
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(0 rows)
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SELECT relname, d.* FROM ONLY d, pg_class where d.tableoid = pg_class.oid;
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relname | aa | bb | cc | dd
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---------+-----+----+----+----
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d | new | | |
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d | new | | |
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d | new | | |
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d | new | | |
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d | new | | |
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d | new | | |
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(6 rows)
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DELETE FROM a;
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SELECT relname, a.* FROM a, pg_class where a.tableoid = pg_class.oid;
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relname | aa
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---------+----
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(0 rows)
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SELECT relname, b.* FROM b, pg_class where b.tableoid = pg_class.oid;
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relname | aa | bb
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---------+----+----
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(0 rows)
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SELECT relname, c.* FROM c, pg_class where c.tableoid = pg_class.oid;
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relname | aa | cc
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---------+----+----
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(0 rows)
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SELECT relname, d.* FROM d, pg_class where d.tableoid = pg_class.oid;
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relname | aa | bb | cc | dd
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---------+----+----+----+----
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(0 rows)
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SELECT relname, a.* FROM ONLY a, pg_class where a.tableoid = pg_class.oid;
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relname | aa
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---------+----
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(0 rows)
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SELECT relname, b.* FROM ONLY b, pg_class where b.tableoid = pg_class.oid;
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relname | aa | bb
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---------+----+----
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(0 rows)
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SELECT relname, c.* FROM ONLY c, pg_class where c.tableoid = pg_class.oid;
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relname | aa | cc
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---------+----+----
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(0 rows)
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|
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SELECT relname, d.* FROM ONLY d, pg_class where d.tableoid = pg_class.oid;
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relname | aa | bb | cc | dd
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---------+----+----+----+----
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(0 rows)
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-- Confirm PRIMARY KEY adds NOT NULL constraint to child table
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CREATE TEMP TABLE z (b TEXT, PRIMARY KEY(aa, b)) inherits (a);
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INSERT INTO z VALUES (NULL, 'text'); -- should fail
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ERROR: null value in column "aa" violates not-null constraint
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DETAIL: Failing row contains (null, text).
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-- Check UPDATE with inherited target and an inherited source table
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create temp table foo(f1 int, f2 int);
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create temp table foo2(f3 int) inherits (foo);
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create temp table bar(f1 int, f2 int);
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create temp table bar2(f3 int) inherits (bar);
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insert into foo values(1,1);
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insert into foo values(3,3);
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insert into foo2 values(2,2,2);
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insert into foo2 values(3,3,3);
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insert into bar values(1,1);
|
|
insert into bar values(2,2);
|
|
insert into bar values(3,3);
|
|
insert into bar values(4,4);
|
|
insert into bar2 values(1,1,1);
|
|
insert into bar2 values(2,2,2);
|
|
insert into bar2 values(3,3,3);
|
|
insert into bar2 values(4,4,4);
|
|
update bar set f2 = f2 + 100 where f1 in (select f1 from foo);
|
|
select tableoid::regclass::text as relname, bar.* from bar order by 1,2;
|
|
relname | f1 | f2
|
|
---------+----+-----
|
|
bar | 1 | 101
|
|
bar | 2 | 102
|
|
bar | 3 | 103
|
|
bar | 4 | 4
|
|
bar2 | 1 | 101
|
|
bar2 | 2 | 102
|
|
bar2 | 3 | 103
|
|
bar2 | 4 | 4
|
|
(8 rows)
|
|
|
|
-- Check UPDATE with inherited target and an appendrel subquery
|
|
update bar set f2 = f2 + 100
|
|
from
|
|
( select f1 from foo union all select f1+3 from foo ) ss
|
|
where bar.f1 = ss.f1;
|
|
select tableoid::regclass::text as relname, bar.* from bar order by 1,2;
|
|
relname | f1 | f2
|
|
---------+----+-----
|
|
bar | 1 | 201
|
|
bar | 2 | 202
|
|
bar | 3 | 203
|
|
bar | 4 | 104
|
|
bar2 | 1 | 201
|
|
bar2 | 2 | 202
|
|
bar2 | 3 | 203
|
|
bar2 | 4 | 104
|
|
(8 rows)
|
|
|
|
/* Test multiple inheritance of column defaults */
|
|
CREATE TABLE firstparent (tomorrow date default now()::date + 1);
|
|
CREATE TABLE secondparent (tomorrow date default now() :: date + 1);
|
|
CREATE TABLE jointchild () INHERITS (firstparent, secondparent); -- ok
|
|
NOTICE: merging multiple inherited definitions of column "tomorrow"
|
|
CREATE TABLE thirdparent (tomorrow date default now()::date - 1);
|
|
CREATE TABLE otherchild () INHERITS (firstparent, thirdparent); -- not ok
|
|
NOTICE: merging multiple inherited definitions of column "tomorrow"
|
|
ERROR: column "tomorrow" inherits conflicting default values
|
|
HINT: To resolve the conflict, specify a default explicitly.
|
|
CREATE TABLE otherchild (tomorrow date default now())
|
|
INHERITS (firstparent, thirdparent); -- ok, child resolves ambiguous default
|
|
NOTICE: merging multiple inherited definitions of column "tomorrow"
|
|
NOTICE: merging column "tomorrow" with inherited definition
|
|
DROP TABLE firstparent, secondparent, jointchild, thirdparent, otherchild;
|
|
-- Test changing the type of inherited columns
|
|
insert into d values('test','one','two','three');
|
|
alter table a alter column aa type integer using bit_length(aa);
|
|
select * from d;
|
|
aa | bb | cc | dd
|
|
----+-----+-----+-------
|
|
32 | one | two | three
|
|
(1 row)
|
|
|
|
-- Test non-inheritable parent constraints
|
|
create table p1(ff1 int);
|
|
alter table p1 add constraint p1chk check (ff1 > 0) no inherit;
|
|
alter table p1 add constraint p2chk check (ff1 > 10);
|
|
-- connoinherit should be true for NO INHERIT constraint
|
|
select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.connoinherit from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname = 'p1' order by 1,2;
|
|
relname | conname | contype | conislocal | coninhcount | connoinherit
|
|
---------+---------+---------+------------+-------------+--------------
|
|
p1 | p1chk | c | t | 0 | t
|
|
p1 | p2chk | c | t | 0 | f
|
|
(2 rows)
|
|
|
|
-- Test that child does not inherit NO INHERIT constraints
|
|
create table c1 () inherits (p1);
|
|
\d p1
|
|
Table "public.p1"
|
|
Column | Type | Modifiers
|
|
--------+---------+-----------
|
|
ff1 | integer |
|
|
Check constraints:
|
|
"p1chk" CHECK (ff1 > 0) NO INHERIT
|
|
"p2chk" CHECK (ff1 > 10)
|
|
Number of child tables: 1 (Use \d+ to list them.)
|
|
|
|
\d c1
|
|
Table "public.c1"
|
|
Column | Type | Modifiers
|
|
--------+---------+-----------
|
|
ff1 | integer |
|
|
Check constraints:
|
|
"p2chk" CHECK (ff1 > 10)
|
|
Inherits: p1
|
|
|
|
drop table p1 cascade;
|
|
NOTICE: drop cascades to table c1
|
|
-- Tests for casting between the rowtypes of parent and child
|
|
-- tables. See the pgsql-hackers thread beginning Dec. 4/04
|
|
create table base (i integer);
|
|
create table derived () inherits (base);
|
|
insert into derived (i) values (0);
|
|
select derived::base from derived;
|
|
derived
|
|
---------
|
|
(0)
|
|
(1 row)
|
|
|
|
drop table derived;
|
|
drop table base;
|
|
create table p1(ff1 int);
|
|
create table p2(f1 text);
|
|
create function p2text(p2) returns text as 'select $1.f1' language sql;
|
|
create table c1(f3 int) inherits(p1,p2);
|
|
insert into c1 values(123456789, 'hi', 42);
|
|
select p2text(c1.*) from c1;
|
|
p2text
|
|
--------
|
|
hi
|
|
(1 row)
|
|
|
|
drop function p2text(p2);
|
|
drop table c1;
|
|
drop table p2;
|
|
drop table p1;
|
|
CREATE TABLE ac (aa TEXT);
|
|
alter table ac add constraint ac_check check (aa is not null);
|
|
CREATE TABLE bc (bb TEXT) INHERITS (ac);
|
|
select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
|
|
relname | conname | contype | conislocal | coninhcount | consrc
|
|
---------+----------+---------+------------+-------------+------------------
|
|
ac | ac_check | c | t | 0 | (aa IS NOT NULL)
|
|
bc | ac_check | c | f | 1 | (aa IS NOT NULL)
|
|
(2 rows)
|
|
|
|
insert into ac (aa) values (NULL);
|
|
ERROR: new row for relation "ac" violates check constraint "ac_check"
|
|
DETAIL: Failing row contains (null).
|
|
insert into bc (aa) values (NULL);
|
|
ERROR: new row for relation "bc" violates check constraint "ac_check"
|
|
DETAIL: Failing row contains (null, null).
|
|
alter table bc drop constraint ac_check; -- fail, disallowed
|
|
ERROR: cannot drop inherited constraint "ac_check" of relation "bc"
|
|
alter table ac drop constraint ac_check;
|
|
select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
|
|
relname | conname | contype | conislocal | coninhcount | consrc
|
|
---------+---------+---------+------------+-------------+--------
|
|
(0 rows)
|
|
|
|
-- try the unnamed-constraint case
|
|
alter table ac add check (aa is not null);
|
|
select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
|
|
relname | conname | contype | conislocal | coninhcount | consrc
|
|
---------+-------------+---------+------------+-------------+------------------
|
|
ac | ac_aa_check | c | t | 0 | (aa IS NOT NULL)
|
|
bc | ac_aa_check | c | f | 1 | (aa IS NOT NULL)
|
|
(2 rows)
|
|
|
|
insert into ac (aa) values (NULL);
|
|
ERROR: new row for relation "ac" violates check constraint "ac_aa_check"
|
|
DETAIL: Failing row contains (null).
|
|
insert into bc (aa) values (NULL);
|
|
ERROR: new row for relation "bc" violates check constraint "ac_aa_check"
|
|
DETAIL: Failing row contains (null, null).
|
|
alter table bc drop constraint ac_aa_check; -- fail, disallowed
|
|
ERROR: cannot drop inherited constraint "ac_aa_check" of relation "bc"
|
|
alter table ac drop constraint ac_aa_check;
|
|
select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
|
|
relname | conname | contype | conislocal | coninhcount | consrc
|
|
---------+---------+---------+------------+-------------+--------
|
|
(0 rows)
|
|
|
|
alter table ac add constraint ac_check check (aa is not null);
|
|
alter table bc no inherit ac;
|
|
select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
|
|
relname | conname | contype | conislocal | coninhcount | consrc
|
|
---------+----------+---------+------------+-------------+------------------
|
|
ac | ac_check | c | t | 0 | (aa IS NOT NULL)
|
|
bc | ac_check | c | t | 0 | (aa IS NOT NULL)
|
|
(2 rows)
|
|
|
|
alter table bc drop constraint ac_check;
|
|
select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
|
|
relname | conname | contype | conislocal | coninhcount | consrc
|
|
---------+----------+---------+------------+-------------+------------------
|
|
ac | ac_check | c | t | 0 | (aa IS NOT NULL)
|
|
(1 row)
|
|
|
|
alter table ac drop constraint ac_check;
|
|
select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
|
|
relname | conname | contype | conislocal | coninhcount | consrc
|
|
---------+---------+---------+------------+-------------+--------
|
|
(0 rows)
|
|
|
|
drop table bc;
|
|
drop table ac;
|
|
create table ac (a int constraint check_a check (a <> 0));
|
|
create table bc (a int constraint check_a check (a <> 0), b int constraint check_b check (b <> 0)) inherits (ac);
|
|
NOTICE: merging column "a" with inherited definition
|
|
NOTICE: merging constraint "check_a" with inherited definition
|
|
select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc') order by 1,2;
|
|
relname | conname | contype | conislocal | coninhcount | consrc
|
|
---------+---------+---------+------------+-------------+----------
|
|
ac | check_a | c | t | 0 | (a <> 0)
|
|
bc | check_a | c | t | 1 | (a <> 0)
|
|
bc | check_b | c | t | 0 | (b <> 0)
|
|
(3 rows)
|
|
|
|
drop table bc;
|
|
drop table ac;
|
|
create table ac (a int constraint check_a check (a <> 0));
|
|
create table bc (b int constraint check_b check (b <> 0));
|
|
create table cc (c int constraint check_c check (c <> 0)) inherits (ac, bc);
|
|
select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc', 'cc') order by 1,2;
|
|
relname | conname | contype | conislocal | coninhcount | consrc
|
|
---------+---------+---------+------------+-------------+----------
|
|
ac | check_a | c | t | 0 | (a <> 0)
|
|
bc | check_b | c | t | 0 | (b <> 0)
|
|
cc | check_a | c | f | 1 | (a <> 0)
|
|
cc | check_b | c | f | 1 | (b <> 0)
|
|
cc | check_c | c | t | 0 | (c <> 0)
|
|
(5 rows)
|
|
|
|
alter table cc no inherit bc;
|
|
select pc.relname, pgc.conname, pgc.contype, pgc.conislocal, pgc.coninhcount, pgc.consrc from pg_class as pc inner join pg_constraint as pgc on (pgc.conrelid = pc.oid) where pc.relname in ('ac', 'bc', 'cc') order by 1,2;
|
|
relname | conname | contype | conislocal | coninhcount | consrc
|
|
---------+---------+---------+------------+-------------+----------
|
|
ac | check_a | c | t | 0 | (a <> 0)
|
|
bc | check_b | c | t | 0 | (b <> 0)
|
|
cc | check_a | c | f | 1 | (a <> 0)
|
|
cc | check_b | c | t | 0 | (b <> 0)
|
|
cc | check_c | c | t | 0 | (c <> 0)
|
|
(5 rows)
|
|
|
|
drop table cc;
|
|
drop table bc;
|
|
drop table ac;
|
|
create table p1(f1 int);
|
|
create table p2(f2 int);
|
|
create table c1(f3 int) inherits(p1,p2);
|
|
insert into c1 values(1,-1,2);
|
|
alter table p2 add constraint cc check (f2>0); -- fail
|
|
ERROR: check constraint "cc" is violated by some row
|
|
alter table p2 add check (f2>0); -- check it without a name, too
|
|
ERROR: check constraint "p2_f2_check" is violated by some row
|
|
delete from c1;
|
|
insert into c1 values(1,1,2);
|
|
alter table p2 add check (f2>0);
|
|
insert into c1 values(1,-1,2); -- fail
|
|
ERROR: new row for relation "c1" violates check constraint "p2_f2_check"
|
|
DETAIL: Failing row contains (1, -1, 2).
|
|
create table c2(f3 int) inherits(p1,p2);
|
|
\d c2
|
|
Table "public.c2"
|
|
Column | Type | Modifiers
|
|
--------+---------+-----------
|
|
f1 | integer |
|
|
f2 | integer |
|
|
f3 | integer |
|
|
Check constraints:
|
|
"p2_f2_check" CHECK (f2 > 0)
|
|
Inherits: p1,
|
|
p2
|
|
|
|
create table c3 (f4 int) inherits(c1,c2);
|
|
NOTICE: merging multiple inherited definitions of column "f1"
|
|
NOTICE: merging multiple inherited definitions of column "f2"
|
|
NOTICE: merging multiple inherited definitions of column "f3"
|
|
\d c3
|
|
Table "public.c3"
|
|
Column | Type | Modifiers
|
|
--------+---------+-----------
|
|
f1 | integer |
|
|
f2 | integer |
|
|
f3 | integer |
|
|
f4 | integer |
|
|
Check constraints:
|
|
"p2_f2_check" CHECK (f2 > 0)
|
|
Inherits: c1,
|
|
c2
|
|
|
|
drop table p1 cascade;
|
|
NOTICE: drop cascades to 3 other objects
|
|
DETAIL: drop cascades to table c1
|
|
drop cascades to table c2
|
|
drop cascades to table c3
|
|
drop table p2 cascade;
|
|
create table pp1 (f1 int);
|
|
create table cc1 (f2 text, f3 int) inherits (pp1);
|
|
alter table pp1 add column a1 int check (a1 > 0);
|
|
\d cc1
|
|
Table "public.cc1"
|
|
Column | Type | Modifiers
|
|
--------+---------+-----------
|
|
f1 | integer |
|
|
f2 | text |
|
|
f3 | integer |
|
|
a1 | integer |
|
|
Check constraints:
|
|
"pp1_a1_check" CHECK (a1 > 0)
|
|
Inherits: pp1
|
|
|
|
create table cc2(f4 float) inherits(pp1,cc1);
|
|
NOTICE: merging multiple inherited definitions of column "f1"
|
|
NOTICE: merging multiple inherited definitions of column "a1"
|
|
\d cc2
|
|
Table "public.cc2"
|
|
Column | Type | Modifiers
|
|
--------+------------------+-----------
|
|
f1 | integer |
|
|
a1 | integer |
|
|
f2 | text |
|
|
f3 | integer |
|
|
f4 | double precision |
|
|
Check constraints:
|
|
"pp1_a1_check" CHECK (a1 > 0)
|
|
Inherits: pp1,
|
|
cc1
|
|
|
|
alter table pp1 add column a2 int check (a2 > 0);
|
|
NOTICE: merging definition of column "a2" for child "cc2"
|
|
NOTICE: merging constraint "pp1_a2_check" with inherited definition
|
|
\d cc2
|
|
Table "public.cc2"
|
|
Column | Type | Modifiers
|
|
--------+------------------+-----------
|
|
f1 | integer |
|
|
a1 | integer |
|
|
f2 | text |
|
|
f3 | integer |
|
|
f4 | double precision |
|
|
a2 | integer |
|
|
Check constraints:
|
|
"pp1_a1_check" CHECK (a1 > 0)
|
|
"pp1_a2_check" CHECK (a2 > 0)
|
|
Inherits: pp1,
|
|
cc1
|
|
|
|
drop table pp1 cascade;
|
|
NOTICE: drop cascades to 2 other objects
|
|
DETAIL: drop cascades to table cc1
|
|
drop cascades to table cc2
|
|
-- Test for renaming in simple multiple inheritance
|
|
CREATE TABLE inht1 (a int, b int);
|
|
CREATE TABLE inhs1 (b int, c int);
|
|
CREATE TABLE inhts (d int) INHERITS (inht1, inhs1);
|
|
NOTICE: merging multiple inherited definitions of column "b"
|
|
ALTER TABLE inht1 RENAME a TO aa;
|
|
ALTER TABLE inht1 RENAME b TO bb; -- to be failed
|
|
ERROR: cannot rename inherited column "b"
|
|
ALTER TABLE inhts RENAME aa TO aaa; -- to be failed
|
|
ERROR: cannot rename inherited column "aa"
|
|
ALTER TABLE inhts RENAME d TO dd;
|
|
\d+ inhts
|
|
Table "public.inhts"
|
|
Column | Type | Modifiers | Storage | Stats target | Description
|
|
--------+---------+-----------+---------+--------------+-------------
|
|
aa | integer | | plain | |
|
|
b | integer | | plain | |
|
|
c | integer | | plain | |
|
|
dd | integer | | plain | |
|
|
Inherits: inht1,
|
|
inhs1
|
|
|
|
DROP TABLE inhts;
|
|
-- Test for renaming in diamond inheritance
|
|
CREATE TABLE inht2 (x int) INHERITS (inht1);
|
|
CREATE TABLE inht3 (y int) INHERITS (inht1);
|
|
CREATE TABLE inht4 (z int) INHERITS (inht2, inht3);
|
|
NOTICE: merging multiple inherited definitions of column "aa"
|
|
NOTICE: merging multiple inherited definitions of column "b"
|
|
ALTER TABLE inht1 RENAME aa TO aaa;
|
|
\d+ inht4
|
|
Table "public.inht4"
|
|
Column | Type | Modifiers | Storage | Stats target | Description
|
|
--------+---------+-----------+---------+--------------+-------------
|
|
aaa | integer | | plain | |
|
|
b | integer | | plain | |
|
|
x | integer | | plain | |
|
|
y | integer | | plain | |
|
|
z | integer | | plain | |
|
|
Inherits: inht2,
|
|
inht3
|
|
|
|
CREATE TABLE inhts (d int) INHERITS (inht2, inhs1);
|
|
NOTICE: merging multiple inherited definitions of column "b"
|
|
ALTER TABLE inht1 RENAME aaa TO aaaa;
|
|
ALTER TABLE inht1 RENAME b TO bb; -- to be failed
|
|
ERROR: cannot rename inherited column "b"
|
|
\d+ inhts
|
|
Table "public.inhts"
|
|
Column | Type | Modifiers | Storage | Stats target | Description
|
|
--------+---------+-----------+---------+--------------+-------------
|
|
aaaa | integer | | plain | |
|
|
b | integer | | plain | |
|
|
x | integer | | plain | |
|
|
c | integer | | plain | |
|
|
d | integer | | plain | |
|
|
Inherits: inht2,
|
|
inhs1
|
|
|
|
WITH RECURSIVE r AS (
|
|
SELECT 'inht1'::regclass AS inhrelid
|
|
UNION ALL
|
|
SELECT c.inhrelid FROM pg_inherits c, r WHERE r.inhrelid = c.inhparent
|
|
)
|
|
SELECT a.attrelid::regclass, a.attname, a.attinhcount, e.expected
|
|
FROM (SELECT inhrelid, count(*) AS expected FROM pg_inherits
|
|
WHERE inhparent IN (SELECT inhrelid FROM r) GROUP BY inhrelid) e
|
|
JOIN pg_attribute a ON e.inhrelid = a.attrelid WHERE NOT attislocal
|
|
ORDER BY a.attrelid::regclass::name, a.attnum;
|
|
attrelid | attname | attinhcount | expected
|
|
----------+---------+-------------+----------
|
|
inht2 | aaaa | 1 | 1
|
|
inht2 | b | 1 | 1
|
|
inht3 | aaaa | 1 | 1
|
|
inht3 | b | 1 | 1
|
|
inht4 | aaaa | 2 | 2
|
|
inht4 | b | 2 | 2
|
|
inht4 | x | 1 | 2
|
|
inht4 | y | 1 | 2
|
|
inhts | aaaa | 1 | 1
|
|
inhts | b | 2 | 1
|
|
inhts | x | 1 | 1
|
|
inhts | c | 1 | 1
|
|
(12 rows)
|
|
|
|
DROP TABLE inht1, inhs1 CASCADE;
|
|
NOTICE: drop cascades to 4 other objects
|
|
DETAIL: drop cascades to table inht2
|
|
drop cascades to table inhts
|
|
drop cascades to table inht3
|
|
drop cascades to table inht4
|
|
-- Test non-inheritable indices [UNIQUE, EXCLUDE] contraints
|
|
CREATE TABLE test_constraints (id int, val1 varchar, val2 int, UNIQUE(val1, val2));
|
|
CREATE TABLE test_constraints_inh () INHERITS (test_constraints);
|
|
\d+ test_constraints
|
|
Table "public.test_constraints"
|
|
Column | Type | Modifiers | Storage | Stats target | Description
|
|
--------+-------------------+-----------+----------+--------------+-------------
|
|
id | integer | | plain | |
|
|
val1 | character varying | | extended | |
|
|
val2 | integer | | plain | |
|
|
Indexes:
|
|
"test_constraints_val1_val2_key" UNIQUE CONSTRAINT, btree (val1, val2)
|
|
Child tables: test_constraints_inh
|
|
|
|
ALTER TABLE ONLY test_constraints DROP CONSTRAINT test_constraints_val1_val2_key;
|
|
\d+ test_constraints
|
|
Table "public.test_constraints"
|
|
Column | Type | Modifiers | Storage | Stats target | Description
|
|
--------+-------------------+-----------+----------+--------------+-------------
|
|
id | integer | | plain | |
|
|
val1 | character varying | | extended | |
|
|
val2 | integer | | plain | |
|
|
Child tables: test_constraints_inh
|
|
|
|
\d+ test_constraints_inh
|
|
Table "public.test_constraints_inh"
|
|
Column | Type | Modifiers | Storage | Stats target | Description
|
|
--------+-------------------+-----------+----------+--------------+-------------
|
|
id | integer | | plain | |
|
|
val1 | character varying | | extended | |
|
|
val2 | integer | | plain | |
|
|
Inherits: test_constraints
|
|
|
|
DROP TABLE test_constraints_inh;
|
|
DROP TABLE test_constraints;
|
|
CREATE TABLE test_ex_constraints (
|
|
c circle,
|
|
EXCLUDE USING gist (c WITH &&)
|
|
);
|
|
CREATE TABLE test_ex_constraints_inh () INHERITS (test_ex_constraints);
|
|
\d+ test_ex_constraints
|
|
Table "public.test_ex_constraints"
|
|
Column | Type | Modifiers | Storage | Stats target | Description
|
|
--------+--------+-----------+---------+--------------+-------------
|
|
c | circle | | plain | |
|
|
Indexes:
|
|
"test_ex_constraints_c_excl" EXCLUDE USING gist (c WITH &&)
|
|
Child tables: test_ex_constraints_inh
|
|
|
|
ALTER TABLE test_ex_constraints DROP CONSTRAINT test_ex_constraints_c_excl;
|
|
\d+ test_ex_constraints
|
|
Table "public.test_ex_constraints"
|
|
Column | Type | Modifiers | Storage | Stats target | Description
|
|
--------+--------+-----------+---------+--------------+-------------
|
|
c | circle | | plain | |
|
|
Child tables: test_ex_constraints_inh
|
|
|
|
\d+ test_ex_constraints_inh
|
|
Table "public.test_ex_constraints_inh"
|
|
Column | Type | Modifiers | Storage | Stats target | Description
|
|
--------+--------+-----------+---------+--------------+-------------
|
|
c | circle | | plain | |
|
|
Inherits: test_ex_constraints
|
|
|
|
DROP TABLE test_ex_constraints_inh;
|
|
DROP TABLE test_ex_constraints;
|
|
-- Test non-inheritable foreign key contraints
|
|
CREATE TABLE test_primary_constraints(id int PRIMARY KEY);
|
|
CREATE TABLE test_foreign_constraints(id1 int REFERENCES test_primary_constraints(id));
|
|
CREATE TABLE test_foreign_constraints_inh () INHERITS (test_foreign_constraints);
|
|
\d+ test_primary_constraints
|
|
Table "public.test_primary_constraints"
|
|
Column | Type | Modifiers | Storage | Stats target | Description
|
|
--------+---------+-----------+---------+--------------+-------------
|
|
id | integer | not null | plain | |
|
|
Indexes:
|
|
"test_primary_constraints_pkey" PRIMARY KEY, btree (id)
|
|
Referenced by:
|
|
TABLE "test_foreign_constraints" CONSTRAINT "test_foreign_constraints_id1_fkey" FOREIGN KEY (id1) REFERENCES test_primary_constraints(id)
|
|
|
|
\d+ test_foreign_constraints
|
|
Table "public.test_foreign_constraints"
|
|
Column | Type | Modifiers | Storage | Stats target | Description
|
|
--------+---------+-----------+---------+--------------+-------------
|
|
id1 | integer | | plain | |
|
|
Foreign-key constraints:
|
|
"test_foreign_constraints_id1_fkey" FOREIGN KEY (id1) REFERENCES test_primary_constraints(id)
|
|
Child tables: test_foreign_constraints_inh
|
|
|
|
ALTER TABLE test_foreign_constraints DROP CONSTRAINT test_foreign_constraints_id1_fkey;
|
|
\d+ test_foreign_constraints
|
|
Table "public.test_foreign_constraints"
|
|
Column | Type | Modifiers | Storage | Stats target | Description
|
|
--------+---------+-----------+---------+--------------+-------------
|
|
id1 | integer | | plain | |
|
|
Child tables: test_foreign_constraints_inh
|
|
|
|
\d+ test_foreign_constraints_inh
|
|
Table "public.test_foreign_constraints_inh"
|
|
Column | Type | Modifiers | Storage | Stats target | Description
|
|
--------+---------+-----------+---------+--------------+-------------
|
|
id1 | integer | | plain | |
|
|
Inherits: test_foreign_constraints
|
|
|
|
DROP TABLE test_foreign_constraints_inh;
|
|
DROP TABLE test_foreign_constraints;
|
|
DROP TABLE test_primary_constraints;
|
|
--
|
|
-- Test parameterized append plans for inheritance trees
|
|
--
|
|
create temp table patest0 (id, x) as
|
|
select x, x from generate_series(0,1000) x;
|
|
create temp table patest1() inherits (patest0);
|
|
insert into patest1
|
|
select x, x from generate_series(0,1000) x;
|
|
create temp table patest2() inherits (patest0);
|
|
insert into patest2
|
|
select x, x from generate_series(0,1000) x;
|
|
create index patest0i on patest0(id);
|
|
create index patest1i on patest1(id);
|
|
create index patest2i on patest2(id);
|
|
analyze patest0;
|
|
analyze patest1;
|
|
analyze patest2;
|
|
explain (costs off)
|
|
select * from patest0 join (select f1 from int4_tbl limit 1) ss on id = f1;
|
|
QUERY PLAN
|
|
--------------------------------------------------
|
|
Nested Loop
|
|
-> Limit
|
|
-> Seq Scan on int4_tbl
|
|
-> Append
|
|
-> Index Scan using patest0i on patest0
|
|
Index Cond: (id = int4_tbl.f1)
|
|
-> Index Scan using patest1i on patest1
|
|
Index Cond: (id = int4_tbl.f1)
|
|
-> Index Scan using patest2i on patest2
|
|
Index Cond: (id = int4_tbl.f1)
|
|
(10 rows)
|
|
|
|
select * from patest0 join (select f1 from int4_tbl limit 1) ss on id = f1;
|
|
id | x | f1
|
|
----+---+----
|
|
0 | 0 | 0
|
|
0 | 0 | 0
|
|
0 | 0 | 0
|
|
(3 rows)
|
|
|
|
drop index patest2i;
|
|
explain (costs off)
|
|
select * from patest0 join (select f1 from int4_tbl limit 1) ss on id = f1;
|
|
QUERY PLAN
|
|
--------------------------------------------------
|
|
Nested Loop
|
|
-> Limit
|
|
-> Seq Scan on int4_tbl
|
|
-> Append
|
|
-> Index Scan using patest0i on patest0
|
|
Index Cond: (id = int4_tbl.f1)
|
|
-> Index Scan using patest1i on patest1
|
|
Index Cond: (id = int4_tbl.f1)
|
|
-> Seq Scan on patest2
|
|
Filter: (int4_tbl.f1 = id)
|
|
(10 rows)
|
|
|
|
select * from patest0 join (select f1 from int4_tbl limit 1) ss on id = f1;
|
|
id | x | f1
|
|
----+---+----
|
|
0 | 0 | 0
|
|
0 | 0 | 0
|
|
0 | 0 | 0
|
|
(3 rows)
|
|
|
|
drop table patest0 cascade;
|
|
NOTICE: drop cascades to 2 other objects
|
|
DETAIL: drop cascades to table patest1
|
|
drop cascades to table patest2
|
|
--
|
|
-- Test merge-append plans for inheritance trees
|
|
--
|
|
create table matest0 (id serial primary key, name text);
|
|
create table matest1 (id integer primary key) inherits (matest0);
|
|
NOTICE: merging column "id" with inherited definition
|
|
create table matest2 (id integer primary key) inherits (matest0);
|
|
NOTICE: merging column "id" with inherited definition
|
|
create table matest3 (id integer primary key) inherits (matest0);
|
|
NOTICE: merging column "id" with inherited definition
|
|
create index matest0i on matest0 ((1-id));
|
|
create index matest1i on matest1 ((1-id));
|
|
-- create index matest2i on matest2 ((1-id)); -- intentionally missing
|
|
create index matest3i on matest3 ((1-id));
|
|
insert into matest1 (name) values ('Test 1');
|
|
insert into matest1 (name) values ('Test 2');
|
|
insert into matest2 (name) values ('Test 3');
|
|
insert into matest2 (name) values ('Test 4');
|
|
insert into matest3 (name) values ('Test 5');
|
|
insert into matest3 (name) values ('Test 6');
|
|
set enable_indexscan = off; -- force use of seqscan/sort, so no merge
|
|
explain (verbose, costs off) select * from matest0 order by 1-id;
|
|
QUERY PLAN
|
|
------------------------------------------------------------
|
|
Sort
|
|
Output: matest0.id, matest0.name, ((1 - matest0.id))
|
|
Sort Key: ((1 - matest0.id))
|
|
-> Result
|
|
Output: matest0.id, matest0.name, (1 - matest0.id)
|
|
-> Append
|
|
-> Seq Scan on public.matest0
|
|
Output: matest0.id, matest0.name
|
|
-> Seq Scan on public.matest1
|
|
Output: matest1.id, matest1.name
|
|
-> Seq Scan on public.matest2
|
|
Output: matest2.id, matest2.name
|
|
-> Seq Scan on public.matest3
|
|
Output: matest3.id, matest3.name
|
|
(14 rows)
|
|
|
|
select * from matest0 order by 1-id;
|
|
id | name
|
|
----+--------
|
|
6 | Test 6
|
|
5 | Test 5
|
|
4 | Test 4
|
|
3 | Test 3
|
|
2 | Test 2
|
|
1 | Test 1
|
|
(6 rows)
|
|
|
|
explain (verbose, costs off) select min(1-id) from matest0;
|
|
QUERY PLAN
|
|
----------------------------------------
|
|
Aggregate
|
|
Output: min((1 - matest0.id))
|
|
-> Append
|
|
-> Seq Scan on public.matest0
|
|
Output: matest0.id
|
|
-> Seq Scan on public.matest1
|
|
Output: matest1.id
|
|
-> Seq Scan on public.matest2
|
|
Output: matest2.id
|
|
-> Seq Scan on public.matest3
|
|
Output: matest3.id
|
|
(11 rows)
|
|
|
|
select min(1-id) from matest0;
|
|
min
|
|
-----
|
|
-5
|
|
(1 row)
|
|
|
|
reset enable_indexscan;
|
|
set enable_seqscan = off; -- plan with fewest seqscans should be merge
|
|
explain (verbose, costs off) select * from matest0 order by 1-id;
|
|
QUERY PLAN
|
|
------------------------------------------------------------------
|
|
Merge Append
|
|
Sort Key: ((1 - matest0.id))
|
|
-> Index Scan using matest0i on public.matest0
|
|
Output: matest0.id, matest0.name, (1 - matest0.id)
|
|
-> Index Scan using matest1i on public.matest1
|
|
Output: matest1.id, matest1.name, (1 - matest1.id)
|
|
-> Sort
|
|
Output: matest2.id, matest2.name, ((1 - matest2.id))
|
|
Sort Key: ((1 - matest2.id))
|
|
-> Seq Scan on public.matest2
|
|
Output: matest2.id, matest2.name, (1 - matest2.id)
|
|
-> Index Scan using matest3i on public.matest3
|
|
Output: matest3.id, matest3.name, (1 - matest3.id)
|
|
(13 rows)
|
|
|
|
select * from matest0 order by 1-id;
|
|
id | name
|
|
----+--------
|
|
6 | Test 6
|
|
5 | Test 5
|
|
4 | Test 4
|
|
3 | Test 3
|
|
2 | Test 2
|
|
1 | Test 1
|
|
(6 rows)
|
|
|
|
explain (verbose, costs off) select min(1-id) from matest0;
|
|
QUERY PLAN
|
|
--------------------------------------------------------------------------
|
|
Result
|
|
Output: $0
|
|
InitPlan 1 (returns $0)
|
|
-> Limit
|
|
Output: ((1 - matest0.id))
|
|
-> Result
|
|
Output: ((1 - matest0.id))
|
|
-> Merge Append
|
|
Sort Key: ((1 - matest0.id))
|
|
-> Index Scan using matest0i on public.matest0
|
|
Output: matest0.id, (1 - matest0.id)
|
|
Index Cond: ((1 - matest0.id) IS NOT NULL)
|
|
-> Index Scan using matest1i on public.matest1
|
|
Output: matest1.id, (1 - matest1.id)
|
|
Index Cond: ((1 - matest1.id) IS NOT NULL)
|
|
-> Sort
|
|
Output: matest2.id, ((1 - matest2.id))
|
|
Sort Key: ((1 - matest2.id))
|
|
-> Bitmap Heap Scan on public.matest2
|
|
Output: matest2.id, (1 - matest2.id)
|
|
Filter: ((1 - matest2.id) IS NOT NULL)
|
|
-> Bitmap Index Scan on matest2_pkey
|
|
-> Index Scan using matest3i on public.matest3
|
|
Output: matest3.id, (1 - matest3.id)
|
|
Index Cond: ((1 - matest3.id) IS NOT NULL)
|
|
(25 rows)
|
|
|
|
select min(1-id) from matest0;
|
|
min
|
|
-----
|
|
-5
|
|
(1 row)
|
|
|
|
reset enable_seqscan;
|
|
drop table matest0 cascade;
|
|
NOTICE: drop cascades to 3 other objects
|
|
DETAIL: drop cascades to table matest1
|
|
drop cascades to table matest2
|
|
drop cascades to table matest3
|
|
--
|
|
-- Check that use of an index with an extraneous column doesn't produce
|
|
-- a plan with extraneous sorting
|
|
--
|
|
create table matest0 (a int, b int, c int, d int);
|
|
create table matest1 () inherits(matest0);
|
|
create index matest0i on matest0 (b, c);
|
|
create index matest1i on matest1 (b, c);
|
|
set enable_nestloop = off; -- we want a plan with two MergeAppends
|
|
explain (costs off)
|
|
select t1.* from matest0 t1, matest0 t2
|
|
where t1.b = t2.b and t2.c = t2.d
|
|
order by t1.b limit 10;
|
|
QUERY PLAN
|
|
-------------------------------------------------------------------
|
|
Limit
|
|
-> Merge Join
|
|
Merge Cond: (t1.b = t2.b)
|
|
-> Merge Append
|
|
Sort Key: t1.b
|
|
-> Index Scan using matest0i on matest0 t1
|
|
-> Index Scan using matest1i on matest1 t1_1
|
|
-> Materialize
|
|
-> Merge Append
|
|
Sort Key: t2.b
|
|
-> Index Scan using matest0i on matest0 t2
|
|
Filter: (c = d)
|
|
-> Index Scan using matest1i on matest1 t2_1
|
|
Filter: (c = d)
|
|
(14 rows)
|
|
|
|
reset enable_nestloop;
|
|
drop table matest0 cascade;
|
|
NOTICE: drop cascades to table matest1
|
|
--
|
|
-- Test merge-append for UNION ALL append relations
|
|
--
|
|
set enable_seqscan = off;
|
|
set enable_indexscan = on;
|
|
set enable_bitmapscan = off;
|
|
-- Check handling of duplicated, constant, or volatile targetlist items
|
|
explain (costs off)
|
|
SELECT thousand, tenthous FROM tenk1
|
|
UNION ALL
|
|
SELECT thousand, thousand FROM tenk1
|
|
ORDER BY thousand, tenthous;
|
|
QUERY PLAN
|
|
-------------------------------------------------------------------------
|
|
Merge Append
|
|
Sort Key: tenk1.thousand, tenk1.tenthous
|
|
-> Index Only Scan using tenk1_thous_tenthous on tenk1
|
|
-> Sort
|
|
Sort Key: tenk1_1.thousand, tenk1_1.thousand
|
|
-> Index Only Scan using tenk1_thous_tenthous on tenk1 tenk1_1
|
|
(6 rows)
|
|
|
|
explain (costs off)
|
|
SELECT thousand, tenthous, thousand+tenthous AS x FROM tenk1
|
|
UNION ALL
|
|
SELECT 42, 42, hundred FROM tenk1
|
|
ORDER BY thousand, tenthous;
|
|
QUERY PLAN
|
|
------------------------------------------------------------------
|
|
Merge Append
|
|
Sort Key: tenk1.thousand, tenk1.tenthous
|
|
-> Index Only Scan using tenk1_thous_tenthous on tenk1
|
|
-> Sort
|
|
Sort Key: (42), (42)
|
|
-> Index Only Scan using tenk1_hundred on tenk1 tenk1_1
|
|
(6 rows)
|
|
|
|
explain (costs off)
|
|
SELECT thousand, tenthous FROM tenk1
|
|
UNION ALL
|
|
SELECT thousand, random()::integer FROM tenk1
|
|
ORDER BY thousand, tenthous;
|
|
QUERY PLAN
|
|
-------------------------------------------------------------------------
|
|
Merge Append
|
|
Sort Key: tenk1.thousand, tenk1.tenthous
|
|
-> Index Only Scan using tenk1_thous_tenthous on tenk1
|
|
-> Sort
|
|
Sort Key: tenk1_1.thousand, ((random())::integer)
|
|
-> Index Only Scan using tenk1_thous_tenthous on tenk1 tenk1_1
|
|
(6 rows)
|
|
|
|
-- Check min/max aggregate optimization
|
|
explain (costs off)
|
|
SELECT min(x) FROM
|
|
(SELECT unique1 AS x FROM tenk1 a
|
|
UNION ALL
|
|
SELECT unique2 AS x FROM tenk1 b) s;
|
|
QUERY PLAN
|
|
--------------------------------------------------------------------
|
|
Result
|
|
InitPlan 1 (returns $0)
|
|
-> Limit
|
|
-> Merge Append
|
|
Sort Key: a.unique1
|
|
-> Index Only Scan using tenk1_unique1 on tenk1 a
|
|
Index Cond: (unique1 IS NOT NULL)
|
|
-> Index Only Scan using tenk1_unique2 on tenk1 b
|
|
Index Cond: (unique2 IS NOT NULL)
|
|
(9 rows)
|
|
|
|
explain (costs off)
|
|
SELECT min(y) FROM
|
|
(SELECT unique1 AS x, unique1 AS y FROM tenk1 a
|
|
UNION ALL
|
|
SELECT unique2 AS x, unique2 AS y FROM tenk1 b) s;
|
|
QUERY PLAN
|
|
--------------------------------------------------------------------
|
|
Result
|
|
InitPlan 1 (returns $0)
|
|
-> Limit
|
|
-> Merge Append
|
|
Sort Key: a.unique1
|
|
-> Index Only Scan using tenk1_unique1 on tenk1 a
|
|
Index Cond: (unique1 IS NOT NULL)
|
|
-> Index Only Scan using tenk1_unique2 on tenk1 b
|
|
Index Cond: (unique2 IS NOT NULL)
|
|
(9 rows)
|
|
|
|
-- XXX planner doesn't recognize that index on unique2 is sufficiently sorted
|
|
explain (costs off)
|
|
SELECT x, y FROM
|
|
(SELECT thousand AS x, tenthous AS y FROM tenk1 a
|
|
UNION ALL
|
|
SELECT unique2 AS x, unique2 AS y FROM tenk1 b) s
|
|
ORDER BY x, y;
|
|
QUERY PLAN
|
|
-------------------------------------------------------------
|
|
Merge Append
|
|
Sort Key: a.thousand, a.tenthous
|
|
-> Index Only Scan using tenk1_thous_tenthous on tenk1 a
|
|
-> Sort
|
|
Sort Key: b.unique2, b.unique2
|
|
-> Index Only Scan using tenk1_unique2 on tenk1 b
|
|
(6 rows)
|
|
|
|
-- exercise rescan code path via a repeatedly-evaluated subquery
|
|
explain (costs off)
|
|
SELECT
|
|
ARRAY(SELECT f.i FROM (
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|
(SELECT d + g.i FROM generate_series(4, 30, 3) d ORDER BY 1)
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|
UNION ALL
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|
(SELECT d + g.i FROM generate_series(0, 30, 5) d ORDER BY 1)
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) f(i)
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ORDER BY f.i LIMIT 10)
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|
FROM generate_series(1, 3) g(i);
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|
QUERY PLAN
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|
----------------------------------------------------------------
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|
Function Scan on generate_series g
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|
SubPlan 1
|
|
-> Limit
|
|
-> Merge Append
|
|
Sort Key: ((d.d + g.i))
|
|
-> Sort
|
|
Sort Key: ((d.d + g.i))
|
|
-> Function Scan on generate_series d
|
|
-> Sort
|
|
Sort Key: ((d_1.d + g.i))
|
|
-> Function Scan on generate_series d_1
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|
(11 rows)
|
|
|
|
SELECT
|
|
ARRAY(SELECT f.i FROM (
|
|
(SELECT d + g.i FROM generate_series(4, 30, 3) d ORDER BY 1)
|
|
UNION ALL
|
|
(SELECT d + g.i FROM generate_series(0, 30, 5) d ORDER BY 1)
|
|
) f(i)
|
|
ORDER BY f.i LIMIT 10)
|
|
FROM generate_series(1, 3) g(i);
|
|
array
|
|
------------------------------
|
|
{1,5,6,8,11,11,14,16,17,20}
|
|
{2,6,7,9,12,12,15,17,18,21}
|
|
{3,7,8,10,13,13,16,18,19,22}
|
|
(3 rows)
|
|
|
|
reset enable_seqscan;
|
|
reset enable_indexscan;
|
|
reset enable_bitmapscan;
|