MDEV-27398 DESC index causes wrong (empty) result on Federated tables

take descending indexes into account when generating a query

2 files changed, 55 insertions, 0 deletions

diff --git a/mysql-test/suite/federated/indexes.result b/mysql-test/suite/federated/indexes.result
new file mode 100644
index 00000000000..d5ebbeeb6dc
--- /dev/null
+++ b/mysql-test/suite/federated/indexes.result
@@ -0,0 +1,33 @@
+#
+# MDEV-27398 DESC index causes wrong (empty) result on Federated tables
+#
+create table t (a int);
+insert into t values (1),(5),(2),(3),(4);
+create table tf (a int, key(a desc)) connection 'mysql://root@127.0.0.1:$MASTER_MYPORT/test/t' engine=Federated;
+select * from tf;
+a
+1
+2
+3
+4
+5
+select * from tf where a > 2;
+a
+3
+4
+5
+select * from tf where a < 3;
+a
+1
+2
+select * from tf where a >= 3;
+a
+3
+4
+5
+select * from tf where a <= 3;
+a
+1
+2
+3
+drop table tf, t;
diff --git a/mysql-test/suite/federated/indexes.test b/mysql-test/suite/federated/indexes.test
new file mode 100644
index 00000000000..2ad2f823acf
--- /dev/null
+++ b/mysql-test/suite/federated/indexes.test
@@ -0,0 +1,22 @@
+--source include/not_embedded.inc
+--source suite/federated/have_federatedx.inc
+
+--echo #
+--echo # MDEV-27398 DESC index causes wrong (empty) result on Federated tables
+--echo #
+
+create table t (a int);
+insert into t values (1),(5),(2),(3),(4);
+
+--evalp create table tf (a int, key(a desc)) connection 'mysql://root@127.0.0.1:$MASTER_MYPORT/test/t' engine=Federated
+--sorted_result
+select * from tf;
+--sorted_result
+select * from tf where a > 2;
+--sorted_result
+select * from tf where a < 3;
+--sorted_result
+select * from tf where a >= 3;
+--sorted_result
+select * from tf where a <= 3;
+drop table tf, t;