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# # Test for read before write removal(rbwr) optimization in MySQL Cluster # - Run one testcase using different setttings # let $counter = 2; while($counter) { # Load data into test table eval insert into $test_table select * from data_$test_table; # Create reference table eval create table ref_$test_table engine=innodb select * from $test_table; # Run the query against reference table let $test_query_ref = `SELECT REPLACE('$test_query', '$test_table', 'ref_$test_table')`; eval $test_query_ref; # Save ndb_execute_count from before query let $before = query_get_value( select VARIABLE_VALUE from information_schema.session_status where variable_name like 'NDB_EXECUTE_COUNT', VARIABLE_VALUE, 1); let $transaction = 0; if ($counter == 2) { # Run within transaction, this may cause one more execute let $transaction = 1; begin; } # Run the query --enable_info eval $test_query; --disable_info if ($counter == 2) { # Commit the transaction commit; } # Calculate number of ndb_execute_count's generated by query let $diff = query_get_value( select VARIABLE_VALUE-$before AS diff from information_schema.session_status where variable_name like 'NDB_EXECUTE_COUNT', diff, 1); if ($transaction) { # Check if $diff should be decreased to compensate for the # execute caused by using transaction if ($diff != $test_execute_count) { dec $diff; } } if ($diff != $test_execute_count) { --echo !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! --echo Unxpected ndb_execute_count detected --echo - actual ndb_execute_count: $diff --echo - expected ndb_execute_count: $test_execute_count --echo - query: '$test_query' --echo - Within transaction: $transaction --echo !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! let $ndb_rbwr_fail = 1; } # Compare data in test table against reference table let $ndb_diff_tables= $test_table, ref_$test_table; --source suite/ndb/include/ndb_diff_tables.inc # Cleanup eval delete from $test_table; eval drop table ref_$test_table; dec $counter; }