diff options
Diffstat (limited to 'mysql-test/main/insert_debug.test')
-rw-r--r-- | mysql-test/main/insert_debug.test | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/mysql-test/main/insert_debug.test b/mysql-test/main/insert_debug.test new file mode 100644 index 00000000..b35d6b83 --- /dev/null +++ b/mysql-test/main/insert_debug.test @@ -0,0 +1,54 @@ +source include/have_innodb.inc; +source include/have_debug.inc; +source include/have_debug_sync.inc; + +SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED; + +connect (con1, localhost, root,,); +SET SESSION TRANSACTION ISOLATION LEVEL READ COMMITTED; + +connection default; + +let $conn0_id= `SELECT CONNECTION_ID()`; + +CREATE TABLE t1(c1 VARCHAR(10) NOT NULL, c2 VARCHAR(10) NOT NULL, c3 VARCHAR(10) NOT NULL); +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'); + +CREATE TABLE t2(c1 VARCHAR(10) NOT NULL, c2 VARCHAR(10) NOT NULL, c3 VARCHAR(10) NOT NULL); +INSERT INTO t2(c1, c2, c3) VALUES ('A3','B3','IT2'), ('A2','B2','IT2'), ('A4','B4','IT2'), ('A5','B5','II2'); + +CREATE TABLE result(id BIGINT UNSIGNED NOT NULL AUTO_INCREMENT, c1 VARCHAR(10) NOT NULL, c2 VARCHAR(10), +c3 VARCHAR(10), update_count INT DEFAULT 0, UNIQUE KEY uniq_idx (c1,c2), PRIMARY KEY (id)) ENGINE = innodb; + +# Insert one row from 't1' into the 'result' table and wait on a debug sync +# point. The next insert statement from an session 2 inserts values that would +# lead to unique key clash, when this insert resumes. +# The subsequent inserts of this statement(after resume) will fail because of a +# clash with the unique index, and are expected to update the row which clashes +# with the unique key. +# Without the fix for bug#30194841 a stale auto increment value, would cause a +# collision with existing auto increment column value and ends up updating that +# colliding row, instead of the row colliding with the unique index. +SET DEBUG_SYNC = "ha_write_row_end WAIT_FOR flushed EXECUTE 1"; +send INSERT INTO result(c1, c2, c3) SELECT * FROM t1 ON DUPLICATE KEY UPDATE c2=t1.c2, c3='UT1', update_count=update_count+1; + +# While session 1 is waiting (after one insert), insert rows that will cause a clash +# with the inserts of session 1 on the unique key. +connection con1; + +# Wait for the session 1 to hit the debug sync point. +let $wait_condition=SELECT 1 FROM information_schema.processlist WHERE id = $conn0_id AND state LIKE '%ha_write_row_end%'; +--source include/wait_condition.inc + +INSERT INTO result(c1, c2, c3) SELECT * FROM t2 ON DUPLICATE KEY UPDATE c2=t2.c2, c3='UT2', update_count=update_count+1; + +# Signal to resume the insert statement in session 1 +SET DEBUG_SYNC = "now SIGNAL flushed"; +connection default; +reap; +SELECT * FROM result; + +DROP TABLE t1; +DROP TABLE t2; +DROP TABLE result; +SET DEBUG_SYNC = "RESET"; |