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bead24b7f3
Remove one of the major sources of race condiitons in mariadb-test. Normally, mariadb_close() sends COM_QUIT to the server and immediately disconnects. In mariadb-test it means the test can switch to another connection and sends queries to the server before the server even started parsing the COM_QUIT packet and these queries can see the connection as fully active, as it didn't reach dispatch_command yet. This is a major source of instability in tests and many - but not all, still less than a half - tests employ workarounds. The correct one is a pair count_sessions.inc/wait_until_count_sessions.inc. Also very popular was wait_until_disconnected.inc, which was completely useless, because it verifies that the connection is closed, and after disconnect it always is, it didn't verify whether the server processed COM_QUIT. Sadly the placebo was as widely used as the real thing. Let's fix this by making mariadb-test `disconnect` command _to wait_ for the server to confirm. This makes almost all workarounds redundant. In some cases count_sessions.inc/wait_until_count_sessions.inc is still needed, though, as only `disconnect` command is changed: * after external tools, like `exec $MYSQL` * after failed `connect` command * replication, after `STOP SLAVE` * Federated/CONNECT/SPIDER/etc after `DROP TABLE` and also in some XA tests, because an XA transaction is dissociated from the THD very late, after the server has closed the client connection. Collateral cleanups: fix comments, remove some redundant statements: * DROP IF EXISTS if nothing is known to exist * DROP table/view before DROP DATABASE * REVOKE privileges before DROP USER etc
128 lines
2.9 KiB
Text
128 lines
2.9 KiB
Text
# Test for bug #14676111: WRONG PAGE_LEVEL WRITTEN FOR UPPER THAN FATHER PAGE AT BTR_LIFT_PAGE_UP()
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-- source include/have_innodb.inc
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-- source include/have_debug.inc
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set @old_innodb_limit_optimistic_insert_debug = @@innodb_limit_optimistic_insert_debug;
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CREATE TABLE t1 (a INT PRIMARY KEY) ENGINE=InnoDB STATS_PERSISTENT=0;
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#
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# make 4 leveled straight tree
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#
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set global innodb_limit_optimistic_insert_debug = 2;
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insert into t1 values (1);
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--connect (con5,localhost,root)
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begin;
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insert into t1 values (5);
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#current tree form
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# (1, 5)
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--connect (con4,localhost,root)
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begin;
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insert into t1 values (4);
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#records in a page is limited to 2 artificially. root rise occurs
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#current tree form
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# (1, 5)
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#(1, 4) (5)
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--connection default
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insert into t1 values (3);
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#current tree form
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# (1, 5)
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# (1, 4) (5)
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#(1, 3) (4) (5)
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--connect (con2,localhost,root)
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begin;
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insert into t1 values (2);
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#current tree form
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# (1, 5)
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# (1, 4) (5)
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# (1, 3) (4) (5)
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#(1, 2) (3) (4) (5)
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--connection default
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analyze table t1;
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select CLUST_INDEX_SIZE from information_schema.INNODB_SYS_TABLESTATS where NAME = 'test/t1';
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--connection con4
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rollback;
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--disconnect con4
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--connection default
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#deleting 1 record of 2 records don't cause merge artificially.
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#current tree form
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# (1, 5)
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# (1) (5)
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# (1, 3) (5)
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#(1, 2) (3) (5)
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analyze table t1;
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select CLUST_INDEX_SIZE from information_schema.INNODB_SYS_TABLESTATS where NAME = 'test/t1';
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--connection con5
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rollback;
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--disconnect con5
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--connection default
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#deleting 1 record of 2 records don't cause merge artificially.
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#current tree form
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# (1)
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# (1)
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# (1, 3) <- lift up this level next, when deleting node ptr
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#(1, 2) (3) <- merged next
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analyze table t1;
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select CLUST_INDEX_SIZE from information_schema.INNODB_SYS_TABLESTATS where NAME = 'test/t1';
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#
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# cause merge at level 0
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#
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#disable the artificial limitation of records in a page
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set global innodb_limit_optimistic_insert_debug = 10000;
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--connection con2
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rollback;
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--disconnect con2
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--connection default
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#merge page occurs. and lift up occurs.
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#current tree form
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# (1)
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# (1)
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# (1, 3)
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analyze table t1;
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select CLUST_INDEX_SIZE from information_schema.INNODB_SYS_TABLESTATS where NAME = 'test/t1';
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begin;
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insert into t1 values (2);
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#current tree form
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# (1)
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# (1) <- lift up this level next, because it is not root
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# (1, 2, 3)
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rollback;
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#current tree form
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# (1)
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# (1, 3)
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analyze table t1;
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select CLUST_INDEX_SIZE from information_schema.INNODB_SYS_TABLESTATS where NAME = 'test/t1';
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begin;
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insert into t1 values (2);
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#current tree form
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# (1)
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# (1, 2, 3) <- lift up this level next, because the father is root
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rollback;
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#current tree form
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# (1, 3)
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analyze table t1;
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select CLUST_INDEX_SIZE from information_schema.INNODB_SYS_TABLESTATS where NAME = 'test/t1';
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drop table t1;
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set global innodb_limit_optimistic_insert_debug = @old_innodb_limit_optimistic_insert_debug;
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