mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2026-04-28 11:15:33 +02:00
Code Issues Projects Releases Packages Wiki Activity

MDEV-8910 Wrong metadata or field type for MAX(COALESCE(string_field))

Browse source
This commit is contained in:
Alexander Barkov 2015-10-07 11:42:23 +04:00
commit 8afe96f011
7 changed files with 387 additions and 18 deletions
Download patch file Download diff file Expand all files Collapse all files

7
sql/item_sum.cc
View file

@ -1187,7 +1187,7 @@ Item_sum_hybrid::fix_fields(THD *thd, Item **ref)
if ((!item->fixed && item->fix_fields(thd, args)) ||
(item= args[0])->check_cols(1))
return TRUE;
decimals=item->decimals;
Type_std_attributes::set(args[0]);
with_subselect= args[0]->with_subselect;
Item *item2= item->real_item();
@ -1196,13 +1196,13 @@ Item_sum_hybrid::fix_fields(THD *thd, Item **ref)
else if (item->cmp_type() == TIME_RESULT)
set_handler_by_field_type(item2->field_type());
else
set_handler_by_result_type(item2->result_type());
set_handler_by_result_type(item2->result_type(),
max_length, collation.collation);
switch (Item_sum_hybrid::result_type()) {
case INT_RESULT:
case DECIMAL_RESULT:
case STRING_RESULT:
max_length= item->max_length;
break;
case REAL_RESULT:
max_length= float_length(decimals);
@ -1214,7 +1214,6 @@ Item_sum_hybrid::fix_fields(THD *thd, Item **ref)
setup_hybrid(thd, args[0], NULL);
/* MIN/MAX can return NULL for empty set indepedent of the used column */
maybe_null= 1;
unsigned_flag=item->unsigned_flag;
result_field=0;
null_value=1;
fix_length_and_dec();