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Diffstat (limited to 'mysql-test/include/execute_with_statistics.inc')
| -rw-r--r-- | mysql-test/include/execute_with_statistics.inc | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/mysql-test/include/execute_with_statistics.inc b/mysql-test/include/execute_with_statistics.inc new file mode 100644 index 00000000000..c2305fe5247 --- /dev/null +++ b/mysql-test/include/execute_with_statistics.inc @@ -0,0 +1,30 @@ +# 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 |