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Merge 10.3 into 10.4
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@@ -1,65 +0,0 @@
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use test;
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drop table if exists t1;
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create table t1 (id int primary key, value int, value2 int,
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value3 int, index(value,value2)) engine=innodb;
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insert into t1 values
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(10,10,10,10),(11,11,11,11),(12,12,12,12),(13,13,13,13),(14,14,14,14),
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(15,15,15,15),(16,16,16,16),(17,17,17,17),(18,18,18,18),(19,19,19,19),
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(20,20,20,20);
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connect conn1, localhost, root,,;
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connect conn2, localhost, root,,;
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connect conn3, localhost, root,,;
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connection conn1;
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use test;
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start transaction with consistent snapshot;
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connection conn2;
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use test;
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CREATE PROCEDURE update_t1()
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BEGIN
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DECLARE i INT DEFAULT 1;
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while (i <= 5000) DO
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update test.t1 set value2=value2+1, value3=value3+1 where id=12;
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SET i = i + 1;
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END WHILE;
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END|
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set autocommit=0;
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CALL update_t1();
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select * from t1;
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id value value2 value3
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10 10 10 10
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11 11 11 11
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12 12 5012 5012
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13 13 13 13
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14 14 14 14
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15 15 15 15
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16 16 16 16
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17 17 17 17
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18 18 18 18
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19 19 19 19
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20 20 20 20
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set autocommit=1;
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select * from t1;
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id value value2 value3
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10 10 10 10
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11 11 11 11
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12 12 5012 5012
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13 13 13 13
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14 14 14 14
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15 15 15 15
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16 16 16 16
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17 17 17 17
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18 18 18 18
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19 19 19 19
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20 20 20 20
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connection conn1;
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select * from t1 force index(value) where value=12;
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connection conn3;
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kill query @id;
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connection conn1;
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ERROR 70100: Query execution was interrupted
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connection default;
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disconnect conn1;
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disconnect conn2;
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disconnect conn3;
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drop procedure if exists update_t1;
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drop table if exists t1;
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81
mysql-test/suite/innodb/r/innodb_bug84958.result
Normal file
81
mysql-test/suite/innodb/r/innodb_bug84958.result
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@@ -0,0 +1,81 @@
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#
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# Bug #84958 InnoDB's MVCC has O(N^2) behaviors
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# https://bugs.mysql.com/bug.php?id=84958
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#
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# Set up the test with a procedure and a function.
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#
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CREATE PROCEDURE insert_n(start int, end int)
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BEGIN
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DECLARE i INT DEFAULT start;
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WHILE i <= end do
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INSERT INTO t1 VALUES (1, 2, 3) ON DUPLICATE KEY UPDATE c = i;
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SET i = i + 1;
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END WHILE;
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END~~
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CREATE FUNCTION num_pages_get()
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RETURNS INT
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BEGIN
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DECLARE ret INT;
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SELECT variable_value INTO ret
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FROM information_schema.global_status
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WHERE variable_name = 'innodb_buffer_pool_read_requests';
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RETURN ret;
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END~~
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#
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# Create a table with one record in it and start an RR transaction
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#
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CREATE TABLE t1 (a INT, b INT, c INT, PRIMARY KEY(a,b), KEY (b,c))
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ENGINE=InnoDB;
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BEGIN;
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SELECT * FROM t1;
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a b c
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#
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# Create 100 newer record versions in con2 and con3
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#
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connect con2, localhost, root,,;
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connection con2;
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INSERT INTO t1 VALUES (1, 2, 3) ON DUPLICATE KEY UPDATE c = NULL;
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CALL insert_n(1, 50);;
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connect con3, localhost, root,,;
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connection con3;
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CALL insert_n(51, 100);;
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connection con2;
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connection con3;
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INSERT INTO t1 VALUES (1, 2, 1) ON DUPLICATE KEY UPDATE c = NULL;
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connection default;
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#
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# Connect to default and record how many pages were accessed
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# when selecting the record using the secondary key.
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#
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SET @num_pages_1 = num_pages_get();
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SELECT * FROM t1 force index (b);
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a b c
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SET @num_pages_2= num_pages_get();
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SELECT @num_pages_2 - @num_pages_1 < 500;
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@num_pages_2 - @num_pages_1 < 500
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1
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#
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# Commit and show the final record.
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#
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SELECT * FROM t1;
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a b c
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SELECT * FROM t1 force index (b);
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a b c
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COMMIT;
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SELECT * FROM t1 force index (b);
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a b c
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1 2 NULL
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SELECT * FROM t1;
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a b c
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1 2 NULL
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CHECK TABLE t1;
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Table Op Msg_type Msg_text
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test.t1 check status OK
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#
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# Cleanup
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#
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disconnect con2;
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disconnect con3;
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DROP TABLE t1;
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DROP PROCEDURE insert_n;
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DROP FUNCTION num_pages_get;
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@@ -9,8 +9,8 @@ update t1 set c = 'MariaDB';
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update t1 set c = 'InnoDB';
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set global debug_dbug = '+d,ib_undo_trunc';
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commit;
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drop table t1;
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call mtr.add_suppression("InnoDB: innodb_undo_tablespaces=0 disables dedicated undo log tablespaces");
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SET GLOBAL innodb_fast_shutdown=0;
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FOUND 1 /ib_undo_trunc/ in mysqld.1.err
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# restart: with restart_parameters
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drop table t1;
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