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# include/execute_with_statistics.inc # # SUMMARY # # Explain and execute the select statment in $query. # Then report 'Last_query_cost' estimate from the query # optimizer and total number of 'Handler_read%' when the # query was executed. # Intended usage is to verify that there are not regressions # in either calculated or actuall cost for $query. # # USAGE # # let $query= <select statement>; # --source include/execute_with_statistics.inc # # EXAMPLE # t/greedy_optimizer.test # eval EXPLAIN $query; SHOW STATUS LIKE 'Last_query_cost'; FLUSH STATUS; eval $query; --disable_warnings SELECT SUM(variable_value) AS Total_handler_reads FROM information_schema.session_status WHERE variable_name LIKE 'Handler_read%'; --enable_warnings