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-rw-r--r--mysql-test/main/myisam_mrr.test1
1 files changed, 1 insertions, 0 deletions
diff --git a/mysql-test/main/myisam_mrr.test b/mysql-test/main/myisam_mrr.test
index b15fdf60ce7..e3c758d3c10 100644
--- a/mysql-test/main/myisam_mrr.test
+++ b/mysql-test/main/myisam_mrr.test
@@ -8,6 +8,7 @@ drop table if exists t0, t1, t2, t3;
set @myisam_mrr_tmp=@@optimizer_switch;
set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
+set optimizer_switch='optimize_join_buffer_size=off';
set @mrr_buffer_size_save= @@mrr_buffer_size;
set mrr_buffer_size=79;