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MDEV-18501 Partition pruning doesn't work for historical queries (fix)

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Pruning fix for SYSTEM_TIME INTERVAL partitioning.

Allocating one more element in range_int_array for CURRENT partition
is required for RANGE pruning to work correctly
(get_partition_id_range_for_endpoint()).
This commit is contained in:
Aleksey Midenkov
2019-08-28 19:51:23 +03:00
parent c3f35ea55a
commit 6a490ca0fb
3 changed files with 12 additions and 7 deletions
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13
sql/sql_partition.cc
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@ -1563,7 +1563,7 @@ static bool check_vers_constants(THD *thd, partition_info *part_info)
return 0;
part_info->range_int_array=
(longlong*) thd->alloc(hist_parts * sizeof(longlong));
(longlong*) thd->alloc(part_info->num_parts * sizeof(longlong));
MYSQL_TIME ltime;
List_iterator<partition_element> it(part_info->partitions);
@ -1582,6 +1582,9 @@ static bool check_vers_constants(THD *thd, partition_info *part_info)
if (vers_info->hist_part->range_value <= thd->query_start())
vers_info->hist_part= el;
}
DBUG_ASSERT(el == vers_info->now_part);
el->max_value= true;
part_info->range_int_array[el->id]= el->range_value= LONGLONG_MAX;
return 0;
err:
my_error(ER_DATA_OUT_OF_RANGE, MYF(0), "TIMESTAMP", "INTERVAL");
@ -7671,6 +7674,11 @@ static void set_up_range_analysis_info(partition_info *part_info)
partitioning
*/
switch (part_info->part_type) {
case VERSIONING_PARTITION:
if (!part_info->vers_info->interval.is_set())
{
break;
}
case RANGE_PARTITION:
case LIST_PARTITION:
if (!part_info->column_list)
@ -8107,7 +8115,8 @@ static int get_part_iter_for_interval_via_mapping(partition_info *part_info,
part_iter->ret_null_part= part_iter->ret_null_part_orig= FALSE;
part_iter->ret_default_part= part_iter->ret_default_part_orig= FALSE;
if (part_info->part_type == RANGE_PARTITION)
if (part_info->part_type == RANGE_PARTITION ||
part_info->part_type == VERSIONING_PARTITION)
{
if (part_info->part_charset_field_array)
get_endpoint= get_partition_id_range_for_endpoint_charset;