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MDEV-16872 Add CAST(expr AS FLOAT)

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This commit is contained in:
Alexander Barkov
2019-05-16 10:16:09 +04:00
parent e0e805759f
commit b7d22a843e
12 changed files with 221 additions and 16 deletions
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11
sql/sql_type.h
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@ -51,6 +51,7 @@ class Item_func_neg;
class Item_func_signed;
class Item_func_unsigned;
class Item_double_typecast;
class Item_float_typecast;
class Item_decimal_typecast;
class Item_char_typecast;
class Item_time_typecast;
@ -1391,6 +1392,8 @@ public:
virtual bool
Item_double_typecast_fix_length_and_dec(Item_double_typecast *item) const;
virtual bool
Item_float_typecast_fix_length_and_dec(Item_float_typecast *item) const;
virtual bool
Item_decimal_typecast_fix_length_and_dec(Item_decimal_typecast *item) const;
virtual bool
Item_char_typecast_fix_length_and_dec(Item_char_typecast *item) const;
@ -1695,6 +1698,11 @@ public:
DBUG_ASSERT(0);
return true;
}
bool Item_float_typecast_fix_length_and_dec(Item_float_typecast *) const
{
DBUG_ASSERT(0);
return true;
}
bool Item_decimal_typecast_fix_length_and_dec(Item_decimal_typecast *) const
{
DBUG_ASSERT(0);
@ -2590,6 +2598,8 @@ public:
bool type_can_have_auto_increment_attribute() const { return true; }
uint32 max_display_length(const Item *item) const { return 25; }
uint32 calc_pack_length(uint32 length) const { return sizeof(float); }
Item *create_typecast_item(THD *thd, Item *item,
const Type_cast_attributes &attr) const;
bool Item_send(Item *item, Protocol *protocol, st_value *buf) const
{
return Item_send_float(item, protocol, buf);
@ -3366,6 +3376,7 @@ public:
bool Item_func_signed_fix_length_and_dec(Item_func_signed *) const;
bool Item_func_unsigned_fix_length_and_dec(Item_func_unsigned *) const;
bool Item_double_typecast_fix_length_and_dec(Item_double_typecast *) const;
bool Item_float_typecast_fix_length_and_dec(Item_float_typecast *) const;
bool Item_decimal_typecast_fix_length_and_dec(Item_decimal_typecast *) const;
bool Item_char_typecast_fix_length_and_dec(Item_char_typecast *) const;
bool Item_time_typecast_fix_length_and_dec(Item_time_typecast *) const;