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-rw-r--r--mysql-test/main/opt_trace.test3
1 files changed, 3 insertions, 0 deletions
diff --git a/mysql-test/main/opt_trace.test b/mysql-test/main/opt_trace.test
index 2077422fa1b..b689c80db1e 100644
--- a/mysql-test/main/opt_trace.test
+++ b/mysql-test/main/opt_trace.test
@@ -47,6 +47,8 @@ ANALYZE TABLE t2;
create view v1 as select a from t1 group by b;
create view v2 as select a from t2;
+# MDEV-27421 ./mtr --ps-protocol main.opt_trace fails to produce some traces
+--disable_ps_protocol
--echo # Mergeable view
--optimizer_trace
explain select * from v2 ;
@@ -54,6 +56,7 @@ explain select * from v2 ;
--echo # Non-Mergeable view
--optimizer_trace
explain select * from v1 ;
+--enable_ps_protocol
drop table t1,t2;
drop view v1,v2;