mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 12:02:42 +01:00
25 lines
1,016 B
Text
25 lines
1,016 B
Text
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;
|