MDEV-24283 Assertion `bitmap_is_set(&m_part_info->read_partitions,...

MDEV-24283 Assertion `bitmap_is_set(&m_part_info->read_partitions, m_part_spec.start_part)' failed in ha_partition::handle_ordered_index_scan

ha_partition should not try to search the index
if all partitions were pruned away.

The fix originally by Nayuta Yanagisawa

mysql-test/main/partition_pruning.result

@@ -3529,3 +3529,17 @@ id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t3	p3	ALL	NULL	NULL	NULL	NULL	2	Using where; Using join buffer (flat, BNL join)
 1	SIMPLE	t2	NULL	ALL	NULL	NULL	NULL	NULL	10	Using where; Using join buffer (incremental, BNL join)
 drop table t0,t1,t2,t3;
+#
+# End of 10.3 tests
+#
+#
+# MDEV-24283 Assertion `bitmap_is_set(&m_part_info->read_partitions, m_part_spec.start_part)' failed in ha_partition::handle_ordered_index_scan
+#
+create table t1 (c int key) partition by list (c) (partition p values in (0));
+select max(c) from t1 where c>0;
+max(c)
+NULL
+drop table t1;
+#
+# End of 10.4 tests
+#

mysql-test/main/partition_pruning.test

@@ -1583,3 +1583,18 @@ select * from t1 left join (t3 join t2) on (t1.a=t3.a and t3.a=t2.b and t3.part_
 
 drop table t0,t1,t2,t3;
 
+--echo #
+--echo # End of 10.3 tests
+--echo #
+
+--echo #
+--echo # MDEV-24283 Assertion `bitmap_is_set(&m_part_info->read_partitions, m_part_spec.start_part)' failed in ha_partition::handle_ordered_index_scan
+--echo #
+
+create table t1 (c int key) partition by list (c) (partition p values in (0));
+select max(c) from t1 where c>0;
+drop table t1;
+
+--echo #
+--echo # End of 10.4 tests
+--echo #

sql/ha_partition.cc

@@ -5896,6 +5896,9 @@ int ha_partition::common_first_last(uchar *buf)
 {
   int error;
 
+  if (table->all_partitions_pruned_away)
+    return HA_ERR_END_OF_FILE; // No rows matching WHERE
+
   if (unlikely((error= partition_scan_set_up(buf, FALSE))))
     return error;
   if (!m_ordered_scan_ongoing &&