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8224de4f42
This patch introduces INCLUDE clause to index definition. This clause specifies a list of columns which will be included as a non-key part in the index. The INCLUDE columns exist solely to allow more queries to benefit from index-only scans. Also, such columns don't need to have appropriate operator classes. Expressions are not supported as INCLUDE columns since they cannot be used in index-only scans. Index access methods supporting INCLUDE are indicated by amcaninclude flag in IndexAmRoutine. For now, only B-tree indexes support INCLUDE clause. In B-tree indexes INCLUDE columns are truncated from pivot index tuples (tuples located in non-leaf pages and high keys). Therefore, B-tree indexes now might have variable number of attributes. This patch also provides generic facility to support that: pivot tuples contain number of their attributes in t_tid.ip_posid. Free 13th bit of t_info is used for indicating that. This facility will simplify further support of index suffix truncation. The changes of above are backward-compatible, pg_upgrade doesn't need special handling of B-tree indexes for that. Bump catalog version Author: Anastasia Lubennikova with contribition by Alexander Korotkov and me Reviewed by: Peter Geoghegan, Tomas Vondra, Antonin Houska, Jeff Janes, David Rowley, Alexander Korotkov Discussion: https://www.postgresql.org/message-id/flat/56168952.4010101@postgrespro.ru
84 lines
3.0 KiB
PL/PgSQL
84 lines
3.0 KiB
PL/PgSQL
-- minimal test, basically just verifying that amcheck
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CREATE TABLE bttest_a(id int8);
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CREATE TABLE bttest_b(id int8);
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CREATE TABLE bttest_multi(id int8, data int8);
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INSERT INTO bttest_a SELECT * FROM generate_series(1, 100000);
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INSERT INTO bttest_b SELECT * FROM generate_series(100000, 1, -1);
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INSERT INTO bttest_multi SELECT i, i%2 FROM generate_series(1, 100000) as i;
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CREATE INDEX bttest_a_idx ON bttest_a USING btree (id);
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CREATE INDEX bttest_b_idx ON bttest_b USING btree (id);
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CREATE UNIQUE INDEX bttest_multi_idx ON bttest_multi
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USING btree (id) INCLUDE (data);
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CREATE ROLE bttest_role;
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-- verify permissions are checked (error due to function not callable)
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SET ROLE bttest_role;
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SELECT bt_index_check('bttest_a_idx'::regclass);
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SELECT bt_index_parent_check('bttest_a_idx'::regclass);
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RESET ROLE;
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-- we, intentionally, don't check relation permissions - it's useful
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-- to run this cluster-wide with a restricted account, and as tested
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-- above explicit permission has to be granted for that.
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GRANT EXECUTE ON FUNCTION bt_index_check(regclass) TO bttest_role;
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GRANT EXECUTE ON FUNCTION bt_index_parent_check(regclass) TO bttest_role;
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GRANT EXECUTE ON FUNCTION bt_index_check(regclass, boolean) TO bttest_role;
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GRANT EXECUTE ON FUNCTION bt_index_parent_check(regclass, boolean) TO bttest_role;
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SET ROLE bttest_role;
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SELECT bt_index_check('bttest_a_idx');
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SELECT bt_index_parent_check('bttest_a_idx');
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RESET ROLE;
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-- verify plain tables are rejected (error)
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SELECT bt_index_check('bttest_a');
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SELECT bt_index_parent_check('bttest_a');
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-- verify non-existing indexes are rejected (error)
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SELECT bt_index_check(17);
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SELECT bt_index_parent_check(17);
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-- verify wrong index types are rejected (error)
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BEGIN;
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CREATE INDEX bttest_a_brin_idx ON bttest_a USING brin(id);
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SELECT bt_index_parent_check('bttest_a_brin_idx');
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ROLLBACK;
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-- normal check outside of xact
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SELECT bt_index_check('bttest_a_idx');
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-- more expansive tests
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SELECT bt_index_check('bttest_a_idx', true);
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SELECT bt_index_parent_check('bttest_b_idx', true);
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BEGIN;
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SELECT bt_index_check('bttest_a_idx');
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SELECT bt_index_parent_check('bttest_b_idx');
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-- make sure we don't have any leftover locks
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SELECT * FROM pg_locks
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WHERE relation = ANY(ARRAY['bttest_a', 'bttest_a_idx', 'bttest_b', 'bttest_b_idx']::regclass[])
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AND pid = pg_backend_pid();
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COMMIT;
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-- normal check outside of xact for index with included columns
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SELECT bt_index_check('bttest_multi_idx');
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-- more expansive test for index with included columns
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SELECT bt_index_parent_check('bttest_multi_idx', true);
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SELECT bt_index_parent_check('bttest_multi_idx', true);
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-- repeat same checks with index made by insertions
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TRUNCATE bttest_multi;
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INSERT INTO bttest_multi SELECT i, i%2 FROM generate_series(1, 100000) as i;
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SELECT bt_index_check('bttest_multi_idx');
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SELECT bt_index_parent_check('bttest_multi_idx', true);
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SELECT bt_index_parent_check('bttest_multi_idx', true);
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-- cleanup
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DROP TABLE bttest_a;
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DROP TABLE bttest_b;
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DROP TABLE bttest_multi;
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DROP OWNED BY bttest_role; -- permissions
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DROP ROLE bttest_role;
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