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MWL#90: Subqueries: Inside-out execution for materialized non-sj subqueries

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- Merge into 5.3-main
This commit is contained in:
Sergey Petrunya
2010-12-09 18:07:59 +03:00
parent eb70e64cea 8127e0a621
commit 1bf3964fbe
41 changed files with 3968 additions and 1655 deletions
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14
mysql-test/suite/innodb/r/innodb_mysql.result
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@@ -1727,12 +1727,18 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
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# MariaDB note:
# This will show 2 for table which has 5 rows.
# This is because the access method employed is actually range access
# which scans 2 records (yes, EXPLAIN displays it incorrectly).
# our correct printing is an artifact of changing in select_describe()
# from printing table->starts.records() to tab->records.
EXPLAIN
SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
2 DERIVED t1 index c3,c2 c2 10 NULL 5
2 DERIVED t1 index c3,c2 c2 10 NULL 2
DROP TABLE t1;
CREATE TABLE t1 (c1 REAL, c2 REAL, c3 REAL, KEY (c3), KEY (c2, c3))
ENGINE=InnoDB;
@@ -1741,12 +1747,13 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
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# See above "MariaDB note"
EXPLAIN
SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
2 DERIVED t1 index c3,c2 c2 18 NULL 5
2 DERIVED t1 index c3,c2 c2 18 NULL 2
DROP TABLE t1;
CREATE TABLE t1 (c1 DECIMAL(12,2), c2 DECIMAL(12,2), c3 DECIMAL(12,2),
KEY (c3), KEY (c2, c3))
@@ -1756,12 +1763,13 @@ SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
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# See above "MariaDB note"
EXPLAIN
SELECT 1 FROM (SELECT COUNT(DISTINCT c1)
FROM t1 WHERE c2 IN (1, 1) AND c3 = 2 GROUP BY c2) x;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY <derived2> system NULL NULL NULL NULL 1
2 DERIVED t1 index c3,c2 c2 14 NULL 5
2 DERIVED t1 index c3,c2 c2 14 NULL 2
DROP TABLE t1;
End of 5.1 tests
drop table if exists t1, t2, t3;