MDEV-22247 History partition overflow leads to wrong SELECT result

Historical query with AS OF point after the last history partition
must include last history partition because it can be overflown
(contain history rows out of right endpoint).

Move left point back to hist_part->id in that case.

Author: midenok

mysql-test/suite/versioning/r/partition.result

@@ -726,4 +726,25 @@ create or replace table t1 (a int) with system versioning;
 alter table t1 partition by system_time (partition pn current);
 ERROR HY000: Wrong partitions for `t1`: must have at least one HISTORY and exactly one last CURRENT
 drop table t1;
+#
+# MDEV-22247 History partition overflow leads to wrong SELECT result
+#
+set timestamp= unix_timestamp('2000-01-01 00:00:00');
+create or replace table t1 (x int) with system versioning
+partition by system_time interval 1 hour
+(partition p0 history, partition p1 history, partition pn current);
+insert into t1 values (0);
+update t1 set x= x + 1;
+set timestamp= unix_timestamp('2000-01-01 02:00:01');
+update t1 set x= x + 1;
+select *, row_start, row_end from t1 for system_time as of '2000-01-01 02:00:00';
+x	row_start	row_end
+1	2000-01-01 00:00:00.000000	2000-01-01 02:00:01.000000
+explain partitions select * from t1 for system_time as of '2000-01-01 02:00:00';
+id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	p1,pn	ALL	NULL	NULL	NULL	NULL	#	Using where
+explain partitions select * from t1;
+id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	pn	#	NULL	NULL	NULL	NULL	#	#
+drop table t1;
 # End of 10.3 tests

mysql-test/suite/versioning/t/partition.test

@@ -706,6 +706,27 @@ alter table t1 partition by system_time (partition pn current);
 # Cleanup
 drop table t1;
 
+--echo #
+--echo # MDEV-22247 History partition overflow leads to wrong SELECT result
+--echo #
+set timestamp= unix_timestamp('2000-01-01 00:00:00');
+create or replace table t1 (x int) with system versioning
+partition by system_time interval 1 hour
+(partition p0 history, partition p1 history, partition pn current);
+
+insert into t1 values (0);
+update t1 set x= x + 1;
+
+set timestamp= unix_timestamp('2000-01-01 02:00:01');
+update t1 set x= x + 1;
+
+select *, row_start, row_end from t1 for system_time as of '2000-01-01 02:00:00';
+--replace_column 10 #
+explain partitions select * from t1 for system_time as of '2000-01-01 02:00:00';
+--replace_column 5 # 10 # 11 #
+explain partitions select * from t1;
+drop table t1;
+
 --echo # End of 10.3 tests
 
 --source suite/versioning/common_finish.inc

sql/sql_partition.cc

@@ -3737,6 +3737,17 @@ uint32 get_partition_id_range_for_endpoint(partition_info *part_info,
     if (part_func_value >= part_end_val &&
         (loc_part_id < max_partition || !part_info->defined_max_value))
       loc_part_id++;
+    if (part_info->part_type == VERSIONING_PARTITION &&
+        part_func_value < INT_MAX32 &&
+        loc_part_id > part_info->vers_info->hist_part->id)
+    {
+      /*
+        Historical query with AS OF point after the last history partition must
+        include last history partition because it can be overflown (contain
+        history rows out of right endpoint).
+      */
+      loc_part_id= part_info->vers_info->hist_part->id;
+    }
   }
   else 
   {