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208 lines
6.2 KiB
Plaintext
208 lines
6.2 KiB
Plaintext
--echo #
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--echo # MDEV-25080: Allow pushdown of queries involving UNIONs
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--echo # in outer select to foreign engines
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--source ../include/have_columnstore.inc
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--source ../include/disable_11.8.inc
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if (!$MASTER_MYPORT)
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{
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# Running with --extern
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let $MASTER_MYPORT=`SELECT @@port`;
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}
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#
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# Enable cross engine join
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# Configure user and password in Columnstore.xml file
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#
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--exec $MCS_MCSSETCONFIG CrossEngineSupport User 'cejuser'
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--exec $MCS_MCSSETCONFIG CrossEngineSupport Password 'Vagrant1|0000001'
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--exec $MCS_MCSSETCONFIG CrossEngineSupport Port $MASTER_MYPORT
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#
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# Create corresponding in the server
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#
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--disable_warnings
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CREATE USER IF NOT EXISTS'cejuser'@'localhost' IDENTIFIED BY 'Vagrant1|0000001';
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--enable_warnings
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GRANT ALL PRIVILEGES ON *.* TO 'cejuser'@'localhost';
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FLUSH PRIVILEGES;
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--disable_warnings
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DROP DATABASE IF EXISTS mdev25080;
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--enable_warnings
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CREATE DATABASE mdev25080;
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USE mdev25080;
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CREATE TABLE t1 (a varchar(30)) ENGINE=ColumnStore;
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CREATE TABLE t2 (a varchar(30)) ENGINE=ColumnStore;
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CREATE TABLE t3 (a varchar(30)) ENGINE=MyISAM;
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CREATE TABLE t4 (a varchar(30)) ENGINE=MyISAM;
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INSERT INTO t1 VALUES ('abc'), ('bcd'), ('cde');
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INSERT INTO t2 VALUES ('bcd'), ('cde'), ('def'), ('efg');
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INSERT INTO t3 VALUES ('t3_myisam1'), ('t3_myisam2'), ('t3_myisam3');
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INSERT INTO t4 VALUES ('t4_myisam1'), ('t4_myisam2'), ('t4_myisam3');
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--echo # Pushdown of the whole UNION
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SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY 1;
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EXPLAIN SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY 1;
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SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY 1;
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EXPLAIN SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY 1;
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--echo # UNION with a foreign engine
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SELECT * FROM t1 UNION SELECT * FROM t3 ORDER BY 1;
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EXPLAIN SELECT * FROM t1 UNION SELECT * FROM t3 ORDER BY 1;
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--echo # More than two SELECTs in a UNIT:
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SELECT * FROM t1 UNION
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SELECT * FROM t2 UNION ALL
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SELECT * FROM t1
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ORDER BY 1;
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EXPLAIN SELECT * FROM t1 UNION
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SELECT * FROM t2 UNION ALL
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SELECT * FROM t1
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ORDER BY 1;
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(SELECT * FROM t1 UNION
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SELECT * FROM t2) UNION ALL
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SELECT * FROM t1
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ORDER BY 1;
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EXPLAIN (SELECT * FROM t1 UNION
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SELECT * FROM t2) UNION ALL
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SELECT * FROM t1
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ORDER BY 1;
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SELECT * FROM t1 UNION
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SELECT * FROM t2 UNION ALL
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SELECT * FROM t3 UNION
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SELECT * FROM t4
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ORDER BY 1;
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EXPLAIN SELECT * FROM t1 UNION
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SELECT * FROM t2 UNION ALL
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SELECT * FROM t3 UNION
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SELECT * FROM t4
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ORDER BY 1;
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(SELECT * FROM t1 UNION
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SELECT * FROM t2) UNION ALL
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(SELECT * FROM t3 UNION
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SELECT * FROM t4)
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ORDER BY 1;
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EXPLAIN (SELECT * FROM t1 UNION
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SELECT * FROM t2) UNION ALL
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(SELECT * FROM t3 UNION
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SELECT * FROM t4)
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ORDER BY 1;
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SELECT count(*) FROM t1 UNION
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SELECT count(*) FROM t2 UNION ALL
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SELECT count(*)+20 FROM t2 UNION
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SELECT count(*)+5 FROM t1
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ORDER BY 1;
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EXPLAIN
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SELECT count(*) FROM t1 UNION
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SELECT count(*) FROM t2 UNION ALL
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SELECT count(*)+20 FROM t2 UNION
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SELECT count(*)+5 FROM t1
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ORDER BY 1;
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--echo # UNION inside a derived table: the whole derived table must be pushed
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SELECT a FROM
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(SELECT a FROM t1 UNION ALL SELECT a FROM t2) q ORDER BY a;
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EXPLAIN
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SELECT a FROM
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(SELECT a FROM t1 UNION ALL SELECT a FROM t2) q ORDER BY a;
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SELECT a FROM
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(SELECT a FROM t1 UNION ALL SELECT a FROM t3) q ORDER BY a;
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EXPLAIN
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SELECT a FROM
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(SELECT a FROM t1 UNION ALL SELECT a FROM t3) q ORDER BY a;
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--echo # Prepared statements
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PREPARE stmt FROM "SELECT * FROM t1 UNION
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SELECT * FROM t2 ORDER BY 1";
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EXECUTE stmt;
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EXECUTE stmt;
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EXECUTE stmt;
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PREPARE stmt FROM "EXPLAIN SELECT * FROM t1 UNION
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SELECT * FROM t2 ORDER BY 1";
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EXECUTE stmt;
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EXECUTE stmt;
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PREPARE stmt FROM "(SELECT * FROM t1 UNION
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SELECT * FROM t2) UNION ALL
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(SELECT * FROM t1 UNION
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SELECT * FROM t2) ORDER BY 1";
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EXECUTE stmt;
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EXECUTE stmt;
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EXECUTE stmt;
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PREPARE stmt FROM "EXPLAIN (SELECT * FROM t1 UNION
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SELECT * FROM t2) UNION ALL
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(SELECT * FROM t1 UNION
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SELECT * FROM t2) ORDER BY 1";
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EXECUTE stmt;
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EXECUTE stmt;
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--echo # MCOL-5432 Disable UNION pushdown if an ORDER BY or a LIMIT
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--echo # clause is involved, until MCOL-5222 is fixed.
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SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY a;
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EXPLAIN SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY a;
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SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY a LIMIT 3;
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EXPLAIN SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY a LIMIT 3;
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SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY a DESC LIMIT 5;
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EXPLAIN SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY a DESC LIMIT 5;
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SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY a LIMIT 3 OFFSET 2;
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EXPLAIN SELECT * FROM t1 UNION ALL SELECT * FROM t2 ORDER BY a LIMIT 3 OFFSET 2;
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DELETE FROM t1; DELETE FROM t2; DELETE FROM t3; DELETE FROM t4;
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INSERT INTO t1 VALUES ('1_abc'), ('3_bcd'), ('4_cde');
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INSERT INTO t2 VALUES ('2_bcd'), ('5_cde'), ('6_def'), ('0_efg');
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INSERT INTO t3 VALUES ('10_t3_myisam1'), ('11_t3_myisam2'), ('12_t3_myisam3');
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INSERT INTO t4 VALUES ('20_t4_myisam1'), ('21_t4_myisam2'), ('22_t4_myisam3');
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SELECT a FROM (SELECT a FROM t1 UNION SELECT a FROM t2) AS sub ORDER BY a ASC;
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EXPLAIN SELECT a FROM (SELECT a FROM t1 UNION SELECT a FROM t2) AS sub ORDER BY a ASC;
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SELECT a FROM (SELECT a FROM t1 UNION ALL SELECT a FROM t2) AS sub ORDER BY a DESC;
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EXPLAIN SELECT a FROM (SELECT a FROM t1 UNION ALL SELECT a FROM t2) AS sub ORDER BY a DESC;
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# multi-select chain
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SELECT a FROM (SELECT a FROM t1 UNION SELECT a FROM t2 UNION ALL SELECT a FROM t3) AS sub ORDER BY a;
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EXPLAIN SELECT a FROM (SELECT a FROM t1 UNION SELECT a FROM t2 UNION ALL SELECT a FROM t3) AS sub ORDER BY a;
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# nested
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SELECT a FROM ((SELECT a FROM t1 UNION SELECT a FROM t2) UNION ALL SELECT a FROM t3) AS sub ORDER BY a;
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EXPLAIN SELECT a FROM ((SELECT a FROM t1 UNION SELECT a FROM t2) UNION ALL SELECT a FROM t3) AS sub ORDER BY a;
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# aggregate
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SELECT cnt FROM (SELECT COUNT(*) AS cnt FROM t1 UNION SELECT COUNT(*) AS cnt FROM t2) AS sub ORDER BY cnt;
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EXPLAIN SELECT cnt FROM (SELECT COUNT(*) AS cnt FROM t1 UNION SELECT COUNT(*) AS cnt FROM t2) AS sub ORDER BY cnt;
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# empty subquery result
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DELETE FROM t1; DELETE FROM t2;
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SELECT a FROM (SELECT a FROM t1 UNION SELECT a FROM t2) AS sub ORDER BY a;
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EXPLAIN SELECT a FROM (SELECT a FROM t1 UNION SELECT a FROM t2) AS sub ORDER BY a;
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DROP USER 'cejuser'@'localhost';
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DROP TABLE t1, t2, t3, t4;
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DROP DATABASE mdev25080;
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