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Fixed BUG#51763 Can't delete rows from MEMORY table with HASH key

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mysql-test/suite/heap/heap.result:
  Added test case
mysql-test/suite/heap/heap.test:
  Added test case
storage/heap/hp_delete.c:
  Fixed that we don't change order of keys for the current key when we delete them from the hash table.
  Fixed that 'current_hash_ptr' is correct after heap_delete_key().
  Don't "reset current_hash_ptr" on delete; This will improve time a lot for delete of rows when not all rows matches the search criteria.
This commit is contained in:
Michael Widenius
2013-02-15 20:25:27 +02:00
parent a555ceb2fb
commit 7042dd38c6
3 changed files with 80 additions and 9 deletions
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19
mysql-test/suite/heap/heap.result
View File

@@ -790,3 +790,22 @@ select data_length,index_length from information_schema.tables where table_schem
data_length index_length
81024 121024
drop table t1;
CREATE TABLE t1 (
id int(11) NOT NULL AUTO_INCREMENT,
color enum('GREEN', 'WHITE') DEFAULT NULL,
ts int,
PRIMARY KEY (id),
KEY color (color) USING HASH
) ENGINE=MEMORY DEFAULT CHARSET=utf8;
INSERT INTO t1 VALUES("1","GREEN",1);
INSERT INTO t1 VALUES("2","GREEN",1);
INSERT INTO t1 VALUES("3","GREEN",1);
INSERT INTO t1 VALUES("4","GREEN",1);
INSERT INTO t1 VALUES("5","GREEN",1);
INSERT INTO t1 VALUES("6","GREEN",1);
DELETE FROM t1 WHERE id = 1;
INSERT INTO t1 VALUES("7","GREEN", 2);
DELETE FROM t1 WHERE ts = 1 AND color = 'GREEN';
SELECT * from t1 WHERE ts = 1 AND color = 'GREEN';
id color ts
DROP TABLE t1;

24
mysql-test/suite/heap/heap.test
View File

@@ -537,3 +537,27 @@ insert into t1 select rand(100000000) from t1;
--replace_result 40512 81024 60512 121024
select data_length,index_length from information_schema.tables where table_schema="test" and table_name="t1";
drop table t1;
#
# BUG#51763 Can't delete rows from MEMORY table with HASH key
#
CREATE TABLE t1 (
id int(11) NOT NULL AUTO_INCREMENT,
color enum('GREEN', 'WHITE') DEFAULT NULL,
ts int,
PRIMARY KEY (id),
KEY color (color) USING HASH
) ENGINE=MEMORY DEFAULT CHARSET=utf8;
INSERT INTO t1 VALUES("1","GREEN",1);
INSERT INTO t1 VALUES("2","GREEN",1);
INSERT INTO t1 VALUES("3","GREEN",1);
INSERT INTO t1 VALUES("4","GREEN",1);
INSERT INTO t1 VALUES("5","GREEN",1);
INSERT INTO t1 VALUES("6","GREEN",1);
DELETE FROM t1 WHERE id = 1;
INSERT INTO t1 VALUES("7","GREEN", 2);
DELETE FROM t1 WHERE ts = 1 AND color = 'GREEN';
SELECT * from t1 WHERE ts = 1 AND color = 'GREEN';
DROP TABLE t1;