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MDEV-20273 Add class Item_sum_min_max

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This commit is contained in:
Alexander Barkov
2019-08-07 14:13:44 +04:00
parent a8def12e8a
commit e978efd96b
8 changed files with 108 additions and 95 deletions
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30
sql/sql_type.cc
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@ -365,7 +365,7 @@ Type_handler::blob_type_handler(const Item *item)
/**
This method is used by:
- Item_sum_hybrid, e.g. MAX(item), MIN(item).
- Item_sum_min_max, e.g. MAX(item), MIN(item).
- Item_func_set_user_var
*/
const Type_handler *
@ -3086,9 +3086,9 @@ bool Type_handler_real_result::
QQ: Items should probably be fixed to preserve the exact type.
*/
bool Type_handler_numeric::
Item_sum_hybrid_fix_length_and_dec_numeric(Item_sum_hybrid *func,
const Type_handler *handler)
const
Item_sum_min_max_fix_length_and_dec_numeric(Item_sum_min_max *func,
const Type_handler *handler)
const
{
Item *item= func->arguments()[0];
Item *item2= item->real_item();
@ -3104,28 +3104,28 @@ bool Type_handler_numeric::
bool Type_handler_int_result::
Item_sum_hybrid_fix_length_and_dec(Item_sum_hybrid *func) const
Item_sum_min_max_fix_length_and_dec(Item_sum_min_max *func) const
{
return Item_sum_hybrid_fix_length_and_dec_numeric(func,
&type_handler_longlong);
return Item_sum_min_max_fix_length_and_dec_numeric(func,
&type_handler_longlong);
}
bool Type_handler_real_result::
Item_sum_hybrid_fix_length_and_dec(Item_sum_hybrid *func) const
Item_sum_min_max_fix_length_and_dec(Item_sum_min_max *func) const
{
(void) Item_sum_hybrid_fix_length_and_dec_numeric(func,
&type_handler_double);
(void) Item_sum_min_max_fix_length_and_dec_numeric(func,
&type_handler_double);
func->max_length= func->float_length(func->decimals);
return false;
}
bool Type_handler_decimal_result::
Item_sum_hybrid_fix_length_and_dec(Item_sum_hybrid *func) const
Item_sum_min_max_fix_length_and_dec(Item_sum_min_max *func) const
{
return Item_sum_hybrid_fix_length_and_dec_numeric(func,
&type_handler_newdecimal);
return Item_sum_min_max_fix_length_and_dec_numeric(func,
&type_handler_newdecimal);
}
@ -3138,7 +3138,7 @@ bool Type_handler_decimal_result::
MAX(str_item) chooses the best suitable string type.
*/
bool Type_handler_string_result::
Item_sum_hybrid_fix_length_and_dec(Item_sum_hybrid *func) const
Item_sum_min_max_fix_length_and_dec(Item_sum_min_max *func) const
{
Item *item= func->arguments()[0];
Item *item2= item->real_item();
@ -3164,7 +3164,7 @@ bool Type_handler_string_result::
Traditional temporal types always preserve the type of the argument.
*/
bool Type_handler_temporal_result::
Item_sum_hybrid_fix_length_and_dec(Item_sum_hybrid *func) const
Item_sum_min_max_fix_length_and_dec(Item_sum_min_max *func) const
{
Item *item= func->arguments()[0];
func->Type_std_attributes::set(item);