From a175314c3e5827eb193872241446f2f8f5c9d33c Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 4 May 2024 20:07:14 +0200 Subject: Adding upstream version 1:10.5.12. Signed-off-by: Daniel Baumann --- mysql-test/suite/parts/r/optimizer.result | 45 +++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 mysql-test/suite/parts/r/optimizer.result (limited to 'mysql-test/suite/parts/r/optimizer.result') diff --git a/mysql-test/suite/parts/r/optimizer.result b/mysql-test/suite/parts/r/optimizer.result new file mode 100644 index 00000000..42d85dbb --- /dev/null +++ b/mysql-test/suite/parts/r/optimizer.result @@ -0,0 +1,45 @@ +drop table if exists t1,t2; +# +# Bug#50939: Loose Index Scan unduly relies on engine to remember range +# endpoints +# +CREATE TABLE t1 ( +a INT, +b INT, +KEY ( a, b ) +) PARTITION BY HASH (a) PARTITIONS 1; +CREATE TABLE t2 ( +a INT, +b INT, +KEY ( a, b ) +); +INSERT INTO t1 VALUES (1, 1), (2, 2), (3, 3), (4, 4), (5, 5); +INSERT INTO t1 SELECT a + 5, b + 5 FROM t1; +INSERT INTO t1 SELECT a + 10, b + 10 FROM t1; +INSERT INTO t1 SELECT a + 20, b + 20 FROM t1; +INSERT INTO t1 SELECT a + 40, b + 40 FROM t1; +INSERT INTO t2 SELECT * FROM t1; +# plans should be identical +EXPLAIN SELECT a, MAX(b) FROM t1 WHERE a IN (10,100) GROUP BY a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range a a 5 NULL 2 Using where; Using index +EXPLAIN SELECT a, MAX(b) FROM t2 WHERE a IN (10,100) GROUP BY a; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 range a a 5 NULL 2 Using where; Using index +FLUSH status; +SELECT a, MAX(b) FROM t1 WHERE a IN (10, 100) GROUP BY a; +a MAX(b) +10 10 +# Should be no more than 4 reads. +SHOW status LIKE 'handler_read_key'; +Variable_name Value +Handler_read_key 2 +FLUSH status; +SELECT a, MAX(b) FROM t2 WHERE a IN (10, 100) GROUP BY a; +a MAX(b) +10 10 +# Should be no more than 4 reads. +SHOW status LIKE 'handler_read_key'; +Variable_name Value +Handler_read_key 2 +DROP TABLE t1, t2; -- cgit v1.2.3