diff options
Diffstat (limited to 'sql/sql_type.h')
| -rw-r--r-- | sql/sql_type.h | 166 |
1 files changed, 163 insertions, 3 deletions
diff --git a/sql/sql_type.h b/sql/sql_type.h index 28bb2a2edc9..27fb8a8f7da 100644 --- a/sql/sql_type.h +++ b/sql/sql_type.h @@ -68,6 +68,7 @@ class Arg_comparator; struct st_value; class Protocol; class handler; +struct Schema_specification_st; struct TABLE; struct SORT_FIELD_ATTR; @@ -487,6 +488,44 @@ public: }; +class Type_cast_attributes +{ + CHARSET_INFO *m_charset; + ulonglong m_length; + ulonglong m_decimals; + bool m_length_specified; + bool m_decimals_specified; +public: + Type_cast_attributes(const char *c_len, const char *c_dec, CHARSET_INFO *cs) + :m_charset(cs), m_length(0), m_decimals(0), + m_length_specified(false), m_decimals_specified(false) + { + set_length_and_dec(c_len, c_dec); + } + Type_cast_attributes(CHARSET_INFO *cs) + :m_charset(cs), m_length(0), m_decimals(0), + m_length_specified(false), m_decimals_specified(false) + { } + void set_length_and_dec(const char *c_len, const char *c_dec) + { + int error; + /* + We don't have to check for error here as sql_yacc.yy has guaranteed + that the values are in range of ulonglong + */ + if ((m_length_specified= (c_len != NULL))) + m_length= (ulonglong) my_strtoll10(c_len, NULL, &error); + if ((m_decimals_specified= (c_dec != NULL))) + m_decimals= (ulonglong) my_strtoll10(c_dec, NULL, &error); + } + CHARSET_INFO *charset() const { return m_charset; } + bool length_specified() const { return m_length_specified; } + bool decimals_specified() const { return m_decimals_specified; } + ulonglong length() const { return m_length; } + ulonglong decimals() const { return m_decimals; } +}; + + class Name: private LEX_CSTRING { public: @@ -563,6 +602,7 @@ public: 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); + static const Type_handler *type_handler_long_or_longlong(uint max_char_len); /** Return a string type handler for Item If too_big_for_varchar() returns a BLOB variant, according to length. @@ -656,6 +696,10 @@ public: { return true; } + virtual bool is_scalar_type() const { return true; } + virtual bool can_return_int() const { return true; } + virtual bool can_return_real() const { return true; } + virtual bool is_general_purpose_string_type() const { return false; } virtual uint Item_time_precision(Item *item) const; virtual uint Item_datetime_precision(Item *item) const; virtual uint Item_decimal_scale(const Item *item) const; @@ -707,6 +751,28 @@ public: Column_definition *c, handler *file, ulonglong table_flags) const; + /* + This method is called on queries like: + CREATE TABLE t2 (a INT) AS SELECT a FROM t1; + I.e. column "a" is queried from another table, + but its data type is redefined. + @param OUT def - The column definition to be redefined + @param IN dup - The column definition to take the data type from + (i.e. "a INT" in the above example). + @param IN file - Table owner handler. If it does not support certain + data types, some conversion can be applied. + I.g. true BIT to BIT-AS-CHAR. + @param IN schema - the owner schema definition, e.g. for the default + character set and collation. + @retval true - on error + @retval false - on success + */ + virtual bool Column_definition_redefine_stage1(Column_definition *def, + const Column_definition *dup, + const handler *file, + const Schema_specification_st * + schema) + const; virtual bool Column_definition_prepare_stage2(Column_definition *c, handler *file, ulonglong table_flags) const= 0; @@ -802,6 +868,12 @@ public: Item *src, const Item *cmp) const= 0; virtual Item_cache *Item_get_cache(THD *thd, const Item *item) const= 0; + virtual Item *create_typecast_item(THD *thd, Item *item, + const Type_cast_attributes &attr) const + { + DBUG_ASSERT(0); + return NULL; + } virtual bool set_comparator_func(Arg_comparator *cmp) const= 0; virtual bool Item_hybrid_func_fix_attributes(THD *thd, const char *name, @@ -819,6 +891,9 @@ public: virtual bool Item_sum_variance_fix_length_and_dec(Item_sum_variance *) const= 0; + virtual longlong Item_val_int_signed_typecast(Item *item) const= 0; + virtual longlong Item_val_int_unsigned_typecast(Item *item) const= 0; + virtual String *Item_func_hex_val_str_ascii(Item_func_hex *item, String *str) const= 0; @@ -917,6 +992,9 @@ class Type_handler_row: public Type_handler public: virtual ~Type_handler_row() {} const Name name() const { return m_name_row; } + bool is_scalar_type() const { return false; } + bool can_return_int() const { return false; } + bool can_return_real() const { return false; } enum_field_types field_type() const { DBUG_ASSERT(0); @@ -963,6 +1041,15 @@ public: DBUG_ASSERT(0); return true; } + bool Column_definition_redefine_stage1(Column_definition *def, + const Column_definition *dup, + const handler *file, + const Schema_specification_st *schema) + const + { + DBUG_ASSERT(0); + return true; + } bool Column_definition_prepare_stage2(Column_definition *c, handler *file, ulonglong table_flags) const @@ -1060,6 +1147,16 @@ public: DBUG_ASSERT(0); return true; } + longlong Item_val_int_signed_typecast(Item *item) const + { + DBUG_ASSERT(0); + return 0; + } + longlong Item_val_int_unsigned_typecast(Item *item) const + { + DBUG_ASSERT(0); + return 0; + } String *Item_func_hex_val_str_ascii(Item_func_hex *item, String *str) const { DBUG_ASSERT(0); @@ -1253,6 +1350,10 @@ public: bool Item_sum_sum_fix_length_and_dec(Item_sum_sum *) const; bool Item_sum_avg_fix_length_and_dec(Item_sum_avg *) const; bool Item_sum_variance_fix_length_and_dec(Item_sum_variance *) const; + bool Item_func_signed_fix_length_and_dec(Item_func_signed *item) const; + bool Item_func_unsigned_fix_length_and_dec(Item_func_unsigned *item) const; + longlong Item_val_int_signed_typecast(Item *item) const; + longlong Item_val_int_unsigned_typecast(Item *item) const; String *Item_func_hex_val_str_ascii(Item_func_hex *item, String *str) const; String *Item_func_hybrid_field_type_val_str(Item_func_hybrid_field_type *, String *) const; @@ -1301,6 +1402,8 @@ public: const Type_std_attributes *item, SORT_FIELD_ATTR *attr) const; uint32 max_display_length(const Item *item) const; + Item *create_typecast_item(THD *thd, Item *item, + const Type_cast_attributes &attr) const; uint Item_decimal_precision(const Item *item) const; bool Item_save_in_value(Item *item, st_value *value) const; bool Item_param_set_from_value(THD *thd, @@ -1324,6 +1427,8 @@ public: bool Item_sum_sum_fix_length_and_dec(Item_sum_sum *) const; bool Item_sum_avg_fix_length_and_dec(Item_sum_avg *) const; bool Item_sum_variance_fix_length_and_dec(Item_sum_variance *) const; + longlong Item_val_int_signed_typecast(Item *item) const; + longlong Item_val_int_unsigned_typecast(Item *item) const; String *Item_func_hex_val_str_ascii(Item_func_hex *item, String *str) const; String *Item_func_hybrid_field_type_val_str(Item_func_hybrid_field_type *, String *) const; @@ -1389,6 +1494,8 @@ public: bool Item_sum_sum_fix_length_and_dec(Item_sum_sum *) const; bool Item_sum_avg_fix_length_and_dec(Item_sum_avg *) const; bool Item_sum_variance_fix_length_and_dec(Item_sum_variance *) const; + longlong Item_val_int_signed_typecast(Item *item) const; + longlong Item_val_int_unsigned_typecast(Item *item) const; String *Item_func_hex_val_str_ascii(Item_func_hex *item, String *str) const; String *Item_func_hybrid_field_type_val_str(Item_func_hybrid_field_type *, String *) const; @@ -1457,6 +1564,8 @@ public: bool Item_sum_sum_fix_length_and_dec(Item_sum_sum *) const; bool Item_sum_avg_fix_length_and_dec(Item_sum_avg *) const; bool Item_sum_variance_fix_length_and_dec(Item_sum_variance *) const; + longlong Item_val_int_signed_typecast(Item *item) const; + longlong Item_val_int_unsigned_typecast(Item *item) const; String *Item_func_hex_val_str_ascii(Item_func_hex *item, String *str) const; String *Item_func_hybrid_field_type_val_str(Item_func_hybrid_field_type *, String *) const; @@ -1515,6 +1624,11 @@ public: Column_definition *c, handler *file, ulonglong table_flags) const; + bool Column_definition_redefine_stage1(Column_definition *def, + const Column_definition *dup, + const handler *file, + const Schema_specification_st *schema) + const; uint32 max_display_length(const Item *item) const; uint Item_time_precision(Item *item) const { @@ -1557,6 +1671,10 @@ public: bool Item_sum_sum_fix_length_and_dec(Item_sum_sum *) const; bool Item_sum_avg_fix_length_and_dec(Item_sum_avg *) const; bool Item_sum_variance_fix_length_and_dec(Item_sum_variance *) const; + bool Item_func_signed_fix_length_and_dec(Item_func_signed *item) const; + bool Item_func_unsigned_fix_length_and_dec(Item_func_unsigned *item) const; + longlong Item_val_int_signed_typecast(Item *item) const; + longlong Item_val_int_unsigned_typecast(Item *item) const; String *Item_func_hex_val_str_ascii(Item_func_hex *item, String *str) const; String *Item_func_hybrid_field_type_val_str(Item_func_hybrid_field_type *, String *) const; @@ -1595,6 +1713,13 @@ public: }; +class Type_handler_general_purpose_string: public Type_handler_string_result +{ +public: + bool is_general_purpose_string_type() const { return true; } +}; + + /*** Instantiable classes for every MYSQL_TYPE_XXX @@ -1708,6 +1833,8 @@ public: enum_field_types field_type() const { return MYSQL_TYPE_LONGLONG; } uint32 max_display_length(const Item *item) const { return 20; } uint32 calc_pack_length(uint32 length) const { return 8; } + 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_longlong(item, protocol, buf); @@ -1807,6 +1934,11 @@ public: Column_definition *c, handler *file, ulonglong table_flags) const; + bool Column_definition_redefine_stage1(Column_definition *def, + const Column_definition *dup, + const handler *file, + const Schema_specification_st *schema) + const; bool Column_definition_prepare_stage2(Column_definition *c, handler *file, ulonglong table_flags) const; @@ -1856,6 +1988,8 @@ public: bool type_can_have_auto_increment_attribute() const { return true; } uint32 max_display_length(const Item *item) const { return 53; } uint32 calc_pack_length(uint32 length) const { return sizeof(double); } + 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_double(item, protocol, buf); @@ -1885,6 +2019,8 @@ public: { return MYSQL_TIMESTAMP_TIME; } + Item *create_typecast_item(THD *thd, Item *item, + const Type_cast_attributes &attr) const; uint Item_decimal_scale(const Item *item) const { return Item_decimal_scale_with_seconds(item); @@ -1984,6 +2120,8 @@ public: { return MYSQL_TIMESTAMP_DATE; } + Item *create_typecast_item(THD *thd, Item *item, + const Type_cast_attributes &attr) const; bool Column_definition_fix_attributes(Column_definition *c) const; uint Item_decimal_precision(const Item *item) const; String *print_item_value(THD *thd, Item *item, String *str) const; @@ -2043,6 +2181,8 @@ public: { return MYSQL_TIMESTAMP_DATETIME; } + Item *create_typecast_item(THD *thd, Item *item, + const Type_cast_attributes &attr) const; bool Column_definition_fix_attributes(Column_definition *c) const; uint Item_decimal_scale(const Item *item) const { @@ -2227,6 +2367,11 @@ public: Column_definition *c, handler *file, ulonglong table_flags) const; + bool Column_definition_redefine_stage1(Column_definition *def, + const Column_definition *dup, + const handler *file, + const Schema_specification_st *schema) + const; bool Column_definition_prepare_stage2(Column_definition *c, handler *file, ulonglong table_flags) const; @@ -2237,7 +2382,7 @@ public: }; -class Type_handler_null: public Type_handler_string_result +class Type_handler_null: public Type_handler_general_purpose_string { static const Name m_name_null; public: @@ -2259,6 +2404,11 @@ public: Column_definition *c, handler *file, ulonglong table_flags) const; + bool Column_definition_redefine_stage1(Column_definition *def, + const Column_definition *dup, + const handler *file, + const Schema_specification_st *schema) + const; bool Column_definition_prepare_stage2(Column_definition *c, handler *file, ulonglong table_flags) const @@ -2270,7 +2420,7 @@ public: }; -class Type_handler_longstr: public Type_handler_string_result +class Type_handler_longstr: public Type_handler_general_purpose_string { public: bool type_can_have_key_part() const @@ -2436,6 +2586,8 @@ public: const Name name() const { return m_name_longblob; } enum_field_types field_type() const { return MYSQL_TYPE_LONG_BLOB; } uint32 calc_pack_length(uint32 length) const; + Item *create_typecast_item(THD *thd, Item *item, + const Type_cast_attributes &attr) const; Field *make_conversion_table_field(TABLE *, uint metadata, const Field *target) const; Field *make_table_field(const LEX_CSTRING *name, @@ -2502,6 +2654,8 @@ public: const Type_all_attributes &attr, TABLE *table) const; + bool can_return_int() const { return false; } + bool can_return_real() const { return false; } bool is_traditional_type() const { return false; @@ -2533,7 +2687,7 @@ extern MYSQL_PLUGIN_IMPORT Type_handler_geometry type_handler_geometry; #endif -class Type_handler_typelib: public Type_handler_string_result +class Type_handler_typelib: public Type_handler_general_purpose_string { public: virtual ~Type_handler_typelib() { } @@ -2550,6 +2704,11 @@ public: Column_definition *c, handler *file, ulonglong table_flags) const; + bool Column_definition_redefine_stage1(Column_definition *def, + const Column_definition *dup, + const handler *file, + const Schema_specification_st *schema) + const; }; @@ -2698,6 +2857,7 @@ extern MYSQL_PLUGIN_IMPORT Type_handler_short type_handler_short; extern MYSQL_PLUGIN_IMPORT Type_handler_int24 type_handler_int24; extern MYSQL_PLUGIN_IMPORT Type_handler_long type_handler_long; extern MYSQL_PLUGIN_IMPORT Type_handler_longlong type_handler_longlong; +extern MYSQL_PLUGIN_IMPORT Type_handler_longlong type_handler_ulonglong; extern MYSQL_PLUGIN_IMPORT Type_handler_newdecimal type_handler_newdecimal; extern MYSQL_PLUGIN_IMPORT Type_handler_olddecimal type_handler_olddecimal; |