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MDEV-16806 Add Type_handler::create_literal_item()

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This commit is contained in:
Alexander Barkov
2018-07-24 12:00:17 +04:00
parent fee4632387
commit a78d1aaaa3
8 changed files with 184 additions and 154 deletions
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34
sql/sql_type.h
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@ -31,6 +31,7 @@ class Column_definition;
class Column_definition_attributes;
class Item;
class Item_const;
class Item_literal;
class Item_param;
class Item_cache;
class Item_func_or_sum;
@ -1077,6 +1078,7 @@ protected:
enum_field_types type)
const;
public:
static const Type_handler *odbc_literal_type_handler(const LEX_CSTRING *str);
static const Type_handler *blob_type_handler(uint max_octet_length);
static const Type_handler *string_type_handler(uint max_octet_length);
static const Type_handler *bit_and_int_mixture_handler(uint max_char_len);
@ -1416,6 +1418,32 @@ public:
Item *src,
const Item *cmp) const= 0;
virtual Item_cache *Item_get_cache(THD *thd, const Item *item) const= 0;
/**
A builder for literals with data type name prefix, e.g.:
TIME'00:00:00', DATE'2001-01-01', TIMESTAMP'2001-01-01 00:00:00'.
@param thd The current thread
@param str Character literal
@param length Length of str
@param cs Character set of the string
@param send_error Whether to generate an error on failure
@retval A pointer to a new Item on success
NULL on error (wrong literal value, EOM)
*/
virtual Item_literal *create_literal_item(THD *thd,
const char *str, size_t length,
CHARSET_INFO *cs,
bool send_error) const
{
DBUG_ASSERT(0);
return NULL;
}
Item_literal *create_literal_item(THD *thd, const String *str,
bool send_error) const
{
return create_literal_item(thd, str->ptr(), str->length(), str->charset(),
send_error);
}
virtual Item *create_typecast_item(THD *thd, Item *item,
const Type_cast_attributes &attr) const
{
@ -2894,6 +2922,8 @@ public:
{
return MYSQL_TIMESTAMP_TIME;
}
Item_literal *create_literal_item(THD *thd, const char *str, size_t length,
CHARSET_INFO *cs, bool send_error) const;
Item *create_typecast_item(THD *thd, Item *item,
const Type_cast_attributes &attr) const;
bool Item_eq_value(THD *thd, const Type_cmp_attributes *attr,
@ -3008,6 +3038,8 @@ class Type_handler_temporal_with_date: public Type_handler_temporal_result
{
public:
virtual ~Type_handler_temporal_with_date() {}
Item_literal *create_literal_item(THD *thd, const char *str, size_t length,
CHARSET_INFO *cs, bool send_error) const;
bool Item_eq_value(THD *thd, const Type_cmp_attributes *attr,
Item *a, Item *b) const;
int stored_field_cmp_to_item(THD *thd, Field *field, Item *item) const;
@ -3037,6 +3069,8 @@ public:
{
return MYSQL_TIMESTAMP_DATE;
}
Item_literal *create_literal_item(THD *thd, const char *str, size_t length,
CHARSET_INFO *cs, bool send_error) const;
Item *create_typecast_item(THD *thd, Item *item,
const Type_cast_attributes &attr) const;
bool Column_definition_fix_attributes(Column_definition *c) const;