1
0
mirror of https://github.com/MariaDB/server.git synced 2025-09-02 09:41:40 +03:00
This commit is contained in:
Sergei Golubchik
2019-04-03 17:21:10 +02:00
parent 81a8d8be76
commit 66099b8f2d
7 changed files with 119 additions and 92 deletions

View File

@@ -0,0 +1,25 @@
DROP TABLE IF EXISTS t1,t2;
CREATE TABLE t1 ( a INT NOT NULL, b INT NOT NULL) ;
# The protocolling of many inserts into t1 is suppressed.
ALTER TABLE t1 ADD INDEX i1(a);
DELETE FROM t1 WHERE a > 2000000;
CREATE TABLE t2 LIKE t1;
INSERT INTO t2 SELECT * FROM t1;
SELECT 't2 rows before small delete', COUNT(*) FROM t1;
t2 rows before small delete COUNT(*)
t2 rows before small delete 2000000
DELETE t1,t2 FROM t1,t2 WHERE t1.b=t2.a AND t1.a < 2;
SELECT 't2 rows after small delete', COUNT(*) FROM t2;
t2 rows after small delete COUNT(*)
t2 rows after small delete 1999999
SELECT 't1 rows after small delete', COUNT(*) FROM t1;
t1 rows after small delete COUNT(*)
t1 rows after small delete 1999999
DELETE t1,t2 FROM t1,t2 WHERE t1.b=t2.a AND t1.a < 100*1000;
SELECT 't2 rows after big delete', COUNT(*) FROM t2;
t2 rows after big delete COUNT(*)
t2 rows after big delete 1900001
SELECT 't1 rows after big delete', COUNT(*) FROM t1;
t1 rows after big delete COUNT(*)
t1 rows after big delete 1900001
DROP TABLE t1,t2;