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# Check replication of one statement assuming that the engine on the
# slave is a blackhole engine.
# Input:
# $statement Statement to evaluate, it is assumed to change t1
# 1. Evaluate statement on master, it is assumed to change t1
# 2. Wait for statement to be processed on slave
# 3. SELECT from table t1 to see what was written
# 4. Compare position on slave before executing statement and after
# executing statement. If difference is >0, then something was
# written to the binary log on the slave.
connection slave;
let $before = query_get_value("SHOW MASTER STATUS", Position, 1);
--echo [on master]
connection master;
eval $statement;
--echo [on slave]
sync_slave_with_master;
--echo # Expect 0
SELECT COUNT(*) FROM t1;
let $after = query_get_value("SHOW MASTER STATUS", Position, 1);
let $something_written = `select $after - $before != 0`;
if ($something_written) {
--echo >>> Something was written to binary log <<<
}
if (!$something_written) {
--echo >>> Nothing was written to binary log <<<
}
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