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54 lines
2.4 KiB
Text
54 lines
2.4 KiB
Text
source include/have_innodb.inc;
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source include/have_debug.inc;
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source include/have_debug_sync.inc;
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SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
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connect (con1, localhost, root,,);
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SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED;
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connection default;
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let $conn0_id= `SELECT CONNECTION_ID()`;
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CREATE TABLE t1(c1 VARCHAR(10) NOT NULL, c2 VARCHAR(10) NOT NULL, c3 VARCHAR(10) NOT NULL);
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INSERT INTO t1(c1, c2, c3) VALUES('A1','B1','IT1'), ('A2','B2','IT1'), ('A3','B3','IT1'), ('A4','B4','IT1'), ('A5','B5','IT1'), ('A6','B6','IT1'), ('A7','B7','IT1');
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CREATE TABLE t2(c1 VARCHAR(10) NOT NULL, c2 VARCHAR(10) NOT NULL, c3 VARCHAR(10) NOT NULL);
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INSERT INTO t2(c1, c2, c3) VALUES ('A3','B3','IT2'), ('A2','B2','IT2'), ('A4','B4','IT2'), ('A5','B5','II2');
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CREATE TABLE result(id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, c1 VARCHAR(10) NOT NULL, c2 VARCHAR(10),
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c3 VARCHAR(10), update_count INT DEFAULT 0, UNIQUE KEY uniq_idx (c1,c2), PRIMARY KEY (id)) ENGINE = innodb;
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# Insert one row from 't1' into the 'result' table and wait on a debug sync
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# point. The next insert statement from an session 2 inserts values that would
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# lead to unique key clash, when this insert resumes.
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# The subsequent inserts of this statement(after resume) will fail because of a
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# clash with the unique index, and are expected to update the row which clashes
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# with the unique key.
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# Without the fix for bug#30194841 a stale auto increment value, would cause a
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# collision with existing auto increment column value and ends up updating that
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# colliding row, instead of the row colliding with the unique index.
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SET DEBUG_SYNC = "ha_write_row_end WAIT_FOR flushed EXECUTE 1";
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send INSERT INTO result(c1, c2, c3) SELECT * FROM t1 ON DUPLICATE KEY UPDATE c2=t1.c2, c3='UT1', update_count=update_count+1;
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# While session 1 is waiting (after one insert), insert rows that will cause a clash
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# with the inserts of session 1 on the unique key.
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connection con1;
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# Wait for the session 1 to hit the debug sync point.
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let $wait_condition=SELECT 1 FROM information_schema.processlist WHERE id = $conn0_id AND state LIKE '%ha_write_row_end%';
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--source include/wait_condition.inc
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INSERT INTO result(c1, c2, c3) SELECT * FROM t2 ON DUPLICATE KEY UPDATE c2=t2.c2, c3='UT2', update_count=update_count+1;
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# Signal to resume the insert statement in session 1
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SET DEBUG_SYNC = "now SIGNAL flushed";
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connection default;
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reap;
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SELECT * FROM result;
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DROP TABLE t1;
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DROP TABLE t2;
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DROP TABLE result;
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SET DEBUG_SYNC = "RESET";
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