MDEV-11681: PARTITION BY LIST COLUMNS with default partition: Assertion...

MDEV-11681: PARTITION BY LIST COLUMNS with default partition: Assertion `part_info->num_list_values' failed in get_part_iter_for_interval_cols_via_map

process adge case with only default partition

mysql-test/r/partition_list.result

@@ -310,3 +310,27 @@ create table t1 (a char(1))
 partition by list (ascii(ucase(a)))
 (partition p1 values in (2));
 ERROR HY000: This partition function is not allowed
+#
+# MDEV-11681: PARTITION BY LIST COLUMNS with default partition:
+# Assertion `part_info->num_list_values' failed in
+# get_part_iter_for_interval_cols_via_map
+#
+CREATE TABLE t1 (f int) PARTITION BY LIST COLUMNS (f) (PARTITION pdef DEFAULT);
+insert into t1 values (1),(2);
+select * from t1 where f = 1;
+f
+1
+drop table t1;
+CREATE TABLE t1 (f int, d int) PARTITION BY LIST COLUMNS (f,d) (PARTITION pdef DEFAULT);
+insert into t1 values (1,1),(2,2);
+select * from t1 where f = 1 and d = 1 ;
+f	d
+1	1
+drop table t1;
+CREATE TABLE t1 (f int) PARTITION BY LIST (f) (PARTITION pdef DEFAULT);
+insert into t1 values (1),(2);
+select * from t1 where f = 1;
+f
+1
+drop table t1;
+#end of 10.2 tests

mysql-test/t/partition_list.test

@@ -186,3 +186,26 @@ create table t1 (a char(1))
 partition by list (ascii(ucase(a)))
 (partition p1 values in (2));
 
+--echo #
+--echo # MDEV-11681: PARTITION BY LIST COLUMNS with default partition:
+--echo # Assertion `part_info->num_list_values' failed in
+--echo # get_part_iter_for_interval_cols_via_map
+--echo #
+CREATE TABLE t1 (f int) PARTITION BY LIST COLUMNS (f) (PARTITION pdef DEFAULT);
+insert into t1 values (1),(2);
+select * from t1 where f = 1;
+
+drop table t1;
+
+CREATE TABLE t1 (f int, d int) PARTITION BY LIST COLUMNS (f,d) (PARTITION pdef DEFAULT);
+insert into t1 values (1,1),(2,2);
+select * from t1 where f = 1 and d = 1 ;
+
+drop table t1;
+CREATE TABLE t1 (f int) PARTITION BY LIST (f) (PARTITION pdef DEFAULT);
+insert into t1 values (1),(2);
+select * from t1 where f = 1;
+
+drop table t1;
+
+--echo #end of 10.2 tests

sql/sql_partition.cc

@@ -7703,6 +7703,9 @@ int get_part_iter_for_interval_cols_via_map(partition_info *part_info,
   }
   else if (part_info->part_type == LIST_PARTITION)
   {
+    if (part_info->has_default_partititon() &&
+        part_info->num_parts == 1)
+      DBUG_RETURN(-1); //only DEFAULT partition
     get_col_endpoint= get_partition_id_cols_list_for_endpoint;
     part_iter->get_next= get_next_partition_id_list;
     part_iter->part_info= part_info;