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-rw-r--r--mysql-test/t/repair.test11
1 files changed, 11 insertions, 0 deletions
diff --git a/mysql-test/t/repair.test b/mysql-test/t/repair.test
index 16e1d76d460..91a7442226a 100644
--- a/mysql-test/t/repair.test
+++ b/mysql-test/t/repair.test
@@ -34,4 +34,15 @@ repair table t1;
repair table t1 use_frm;
drop table t1;
+#
+# BUG#18874 - Setting myisam_repair_threads > 1, index cardinality always 1
+#
+CREATE TABLE t1(a INT, KEY(a));
+INSERT INTO t1 VALUES(1),(2),(3),(4),(5);
+SET myisam_repair_threads=2;
+REPAIR TABLE t1;
+SHOW INDEX FROM t1;
+SET myisam_repair_threads=@@global.myisam_repair_threads;
+DROP TABLE t1;
+
# End of 4.1 tests