Current File : //usr/share/mysql-test/include/execute_with_statistics.inc
# 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;
SELECT SUM(variable_value) AS Total_handler_reads
FROM information_schema.session_status
WHERE variable_name LIKE 'Handler_read%';
Mini Shell