/usr/lib/mysql-testsuite/t/innodb_mrr.test is in mysql-testsuite-5.6 5.6.16-1~exp1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# MRR/InnoDB tests.
# (Turns off all other 6.0 optimizer switches than MRR)
#
--source include/have_innodb.inc
--source include/have_mrr.inc
set optimizer_switch='mrr=on,mrr_cost_based=off';
--disable_query_log
if (`select locate('semijoin', @@optimizer_switch) > 0`)
{
set optimizer_switch='semijoin=off';
}
if (`select locate('materialization', @@optimizer_switch) > 0`)
{
set optimizer_switch='materialization=off';
}
if (`select locate('index_condition_pushdown', @@optimizer_switch) > 0`)
{
set optimizer_switch='index_condition_pushdown=off';
}
--enable_query_log
set @save_storage_engine= @@default_storage_engine;
set default_storage_engine=InnoDB;
--source include/mrr_tests.inc
--source include/mrr_innodb_tests.inc
set default_storage_engine= @save_storage_engine;
set optimizer_switch=default;
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