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set @innodb_stats_persistent_save= @@innodb_stats_persistent;
set @innodb_stats_persistent_sample_pages_save=
@@innodb_stats_persistent_sample_pages;
set global innodb_stats_persistent= 1;
set global innodb_stats_persistent_sample_pages=100;
--source include/have_innodb.inc
--source include/no_valgrind_without_big.inc
SET SESSION DEFAULT_STORAGE_ENGINE='InnoDB';
select @@global.use_stat_tables;
select @@session.use_stat_tables;
set @save_use_stat_tables=@@use_stat_tables;
set use_stat_tables='preferably';
--disable_warnings
DROP DATABASE IF EXISTS dbt3_s001;
--enable_warnings
CREATE DATABASE dbt3_s001;
use dbt3_s001;
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='extended_keys=off';
set optimizer_switch='rowid_filter=off';
--disable_query_log
--disable_result_log
--disable_warnings
--source include/dbt3_s001.inc
delete from mysql.table_stats;
delete from mysql.column_stats;
delete from mysql.index_stats;
ANALYZE TABLE
customer, lineitem, nation, orders, part, partsupp, region, supplier;
--enable_warnings
--enable_result_log
--enable_query_log
--echo #
--echo # Bug mdev-503: optimizer ignores setting use_stat_tables='preferably'
--echo #
flush tables
customer, lineitem, nation, orders, part, partsupp, region, supplier;
let $Q3S=
select sql_calc_found_rows straight_join
l_orderkey, sum(l_extendedprice*(1-l_discount)) as revenue,
o_orderdate, o_shippriority
from orders, customer, lineitem
where c_mktsegment = 'BUILDING' and c_custkey = o_custkey
and l_orderkey = o_orderkey and o_orderdate < date '1995-03-15'
and l_shipdate > date '1995-03-15'
group by l_orderkey, o_orderdate, o_shippriority
order by revenue desc, o_orderdate
limit 10;
set use_stat_tables='never';
--replace_column 9 #
eval EXPLAIN $Q3S;
set use_stat_tables='preferably';
--replace_result 2 1
eval EXPLAIN $Q3S;
flush tables customer, orders, lineitem;
eval EXPLAIN $Q3S;
--echo # End of the test case for mdev-503
set optimizer_switch=@save_optimizer_switch;
DROP DATABASE dbt3_s001;
use test;
set use_stat_tables=@save_use_stat_tables;
SET SESSION DEFAULT_STORAGE_ENGINE=DEFAULT;
set global innodb_stats_persistent= @innodb_stats_persistent_save;
set global innodb_stats_persistent_sample_pages=
@innodb_stats_persistent_sample_pages_save;
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