87 lines
2.9 KiB
Plaintext
87 lines
2.9 KiB
Plaintext
#
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# group_min_max related tests that result in an different output when run
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# under --ps.
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#
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#
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--source include/have_ps_protocol.inc
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#
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# Bug#24156: Loose index scan not used with CREATE TABLE ...SELECT and similar statements
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#
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CREATE TABLE t1 (a INT, b INT, INDEX (a,b));
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INSERT INTO t1 (a, b) VALUES (1,1), (1,2), (1,3), (1,4), (1,5),
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(2,2), (2,3), (2,1), (3,1), (4,1), (4,2), (4,3), (4,4), (4,5), (4,6),
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(5,1), (5,2), (5,3), (5,4), (5,5);
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--replace_column 10 X
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EXPLAIN SELECT max(b), a FROM t1 GROUP BY a;
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FLUSH STATUS;
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SELECT max(b), a FROM t1 GROUP BY a;
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SHOW STATUS LIKE 'handler_read__e%';
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--replace_column 10 X
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EXPLAIN SELECT max(b), a FROM t1 GROUP BY a;
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FLUSH STATUS;
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CREATE TABLE t2 SELECT max(b), a FROM t1 GROUP BY a;
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SHOW STATUS LIKE 'handler_read__e%';
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FLUSH STATUS;
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SELECT * FROM (SELECT max(b), a FROM t1 GROUP BY a) b;
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SHOW STATUS LIKE 'handler_read__e%';
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FLUSH STATUS;
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(SELECT max(b), a FROM t1 GROUP BY a) UNION
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(SELECT max(b), a FROM t1 GROUP BY a);
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SHOW STATUS LIKE 'handler_read__e%';
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--replace_column 10 X
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EXPLAIN (SELECT max(b), a FROM t1 GROUP BY a) UNION
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(SELECT max(b), a FROM t1 GROUP BY a);
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--echo # In queries below "index for group-by" should be used for subqueries
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--replace_column 10 X
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EXPLAIN SELECT (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) x
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FROM t1 AS t1_outer;
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--replace_column 10 X
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EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE EXISTS
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(SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
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--replace_column 10 X
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EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE
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(SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) > 12;
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--replace_column 10 X
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EXPLAIN SELECT 1 FROM t1 AS t1_outer WHERE
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a IN (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
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--replace_column 10 X
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EXPLAIN SELECT 1 FROM t1 AS t1_outer GROUP BY a HAVING
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a > (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2);
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--replace_column 10 X
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EXPLAIN SELECT 1 FROM t1 AS t1_outer1 LEFT JOIN t1 AS t1_outer2
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ON t1_outer1.a = (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2)
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AND t1_outer1.b = t1_outer2.b;
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--replace_column 10 X
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EXPLAIN SELECT (SELECT (SELECT max(b) FROM t1 GROUP BY a HAVING a < 2) x
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FROM t1 AS t1_outer) x2 FROM t1 AS t1_outer2;
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CREATE TABLE t3 LIKE t1;
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--echo # Ensure that t3 is loaded into data-dictionary cache.
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--disable_query_log
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--disable_result_log
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SHOW CREATE TABLE t3;
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--enable_result_log
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--enable_query_log
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FLUSH STATUS;
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INSERT INTO t3 SELECT a,MAX(b) FROM t1 GROUP BY a;
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SHOW STATUS LIKE 'handler_read__e%';
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DELETE FROM t3;
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FLUSH STATUS;
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INSERT INTO t3 SELECT 1, (SELECT MAX(b) FROM t1 GROUP BY a HAVING a < 2)
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FROM t1 LIMIT 1;
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SHOW STATUS LIKE 'handler_read__e%';
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FLUSH STATUS;
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DELETE FROM t3 WHERE (SELECT MAX(b) FROM t1 GROUP BY a HAVING a < 2) > 10000;
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SHOW STATUS LIKE 'handler_read__e%';
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FLUSH STATUS;
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--error ER_SUBQUERY_NO_1_ROW
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DELETE FROM t3 WHERE (SELECT (SELECT MAX(b) FROM t1 GROUP BY a HAVING a < 2) x
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FROM t1) > 10000;
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SHOW STATUS LIKE 'handler_read__e%';
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DROP TABLE t1,t2,t3;
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