diff options
Diffstat (limited to 'sql/field.h')
| -rw-r--r-- | sql/field.h | 271 |
1 files changed, 231 insertions, 40 deletions
diff --git a/sql/field.h b/sql/field.h index 60f6fc19d76..37a0cdae070 100644 --- a/sql/field.h +++ b/sql/field.h @@ -157,6 +157,17 @@ public: */ virtual uint32 data_length() { return pack_length(); } virtual uint32 sort_length() const { return pack_length(); } + + /** + Get the maximum size of the data in packed format. + + @return Maximum data length of the field when packed using the + Field::pack() function. + */ + virtual uint32 max_data_length() const { + return pack_length(); + }; + virtual int reset(void) { bzero(ptr,pack_length()); return 0; } virtual void reset_fields() {} virtual void set_default() @@ -339,32 +350,45 @@ public: return str; } virtual bool send_binary(Protocol *protocol); - virtual uchar *pack(uchar *to, const uchar *from, uint max_length=~(uint) 0) + + virtual uchar *pack(uchar *to, const uchar *from, + uint max_length, bool low_byte_first); + /** + @overload Field::pack(uchar*, const uchar*, uint, bool) + */ + uchar *pack(uchar *to, const uchar *from) { - uint32 length=pack_length(); - memcpy(to,from,length); - return to+length; + DBUG_ENTER("Field::pack"); + uchar *result= this->pack(to, from, UINT_MAX, table->s->db_low_byte_first); + DBUG_RETURN(result); } - virtual const uchar *unpack(uchar* to, const uchar *from, uint param_data); - virtual const uchar *unpack(uchar* to, const uchar *from) + + virtual const uchar *unpack(uchar* to, const uchar *from, + uint param_data, bool low_byte_first); + /** + @overload Field::unpack(uchar*, const uchar*, uint, bool) + */ + const uchar *unpack(uchar* to, const uchar *from) { - uint length=pack_length(); - memcpy(to,from,length); - return from+length; + DBUG_ENTER("Field::unpack"); + const uchar *result= unpack(to, from, 0U, table->s->db_low_byte_first); + DBUG_RETURN(result); } - virtual uchar *pack_key(uchar* to, const uchar *from, uint max_length) + + virtual uchar *pack_key(uchar* to, const uchar *from, + uint max_length, bool low_byte_first) { - return pack(to,from,max_length); + return pack(to, from, max_length, low_byte_first); } virtual uchar *pack_key_from_key_image(uchar* to, const uchar *from, - uint max_length) + uint max_length, bool low_byte_first) { - return pack(to,from,max_length); + return pack(to, from, max_length, low_byte_first); } virtual const uchar *unpack_key(uchar* to, const uchar *from, - uint max_length) + uint max_length, bool low_byte_first) { - return unpack(to,from); + return unpack(to, from, max_length, low_byte_first); } virtual uint packed_col_length(const uchar *to, uint length) { return length;} @@ -536,6 +560,7 @@ public: {} int store_decimal(const my_decimal *d); + uint32 max_data_length() const; }; /* base class for float and double and decimal (old one) */ @@ -556,6 +581,10 @@ public: int truncate(double *nr, double max_length); uint32 max_display_length() { return field_length; } uint size_of() const { return sizeof(*this); } + virtual const uchar *unpack(uchar* to, const uchar *from, + uint param_data, bool low_byte_first); + virtual uchar *pack(uchar* to, const uchar *from, + uint max_length, bool low_byte_first); }; @@ -584,6 +613,16 @@ public: void overflow(bool negative); bool zero_pack() const { return 0; } void sql_type(String &str) const; + virtual const uchar *unpack(uchar* to, const uchar *from, + uint param_data, bool low_byte_first) + { + return Field::unpack(to, from, param_data, low_byte_first); + } + virtual uchar *pack(uchar* to, const uchar *from, + uint max_length, bool low_byte_first) + { + return Field::pack(to, from, max_length, low_byte_first); + } }; @@ -629,7 +668,8 @@ public: uint size_of() const { return sizeof(*this); } uint32 pack_length() const { return (uint32) bin_size; } uint is_equal(Create_field *new_field); - virtual const uchar *unpack(uchar* to, const uchar *from, uint param_data); + virtual const uchar *unpack(uchar* to, const uchar *from, + uint param_data, bool low_byte_first); }; @@ -660,6 +700,20 @@ public: uint32 pack_length() const { return 1; } void sql_type(String &str) const; uint32 max_display_length() { return 4; } + + virtual uchar *pack(uchar* to, const uchar *from, + uint max_length, bool low_byte_first) + { + *to= *from; + return to + 1; + } + + virtual const uchar *unpack(uchar* to, const uchar *from, + uint param_data, bool low_byte_first) + { + *to= *from; + return from + 1; + } }; @@ -695,8 +749,47 @@ public: uint32 pack_length() const { return 2; } void sql_type(String &str) const; uint32 max_display_length() { return 6; } -}; + virtual uchar *pack(uchar* to, const uchar *from, + uint max_length, bool low_byte_first) + { + int16 val; +#ifdef WORDS_BIGENDIAN + if (table->s->db_low_byte_first) + val = sint2korr(from); + else +#endif + shortget(val, from); + +#ifdef WORDS_BIGENDIAN + if (low_byte_first) + int2store(to, val); + else +#endif + shortstore(to, val); + return to + sizeof(val); + } + + virtual const uchar *unpack(uchar* to, const uchar *from, + uint param_data, bool low_byte_first) + { + int16 val; +#ifdef WORDS_BIGENDIAN + if (low_byte_first) + val = sint2korr(from); + else +#endif + shortget(val, from); + +#ifdef WORDS_BIGENDIAN + if (table->s->db_low_byte_first) + int2store(to, val); + else +#endif + shortstore(to, val); + return from + sizeof(val); + } +}; class Field_medium :public Field_num { public: @@ -725,6 +818,18 @@ public: uint32 pack_length() const { return 3; } void sql_type(String &str) const; uint32 max_display_length() { return 8; } + + virtual uchar *pack(uchar* to, const uchar *from, + uint max_length, bool low_byte_first) + { + return Field::pack(to, from, max_length, low_byte_first); + } + + virtual const uchar *unpack(uchar* to, const uchar *from, + uint param_data, bool low_byte_first) + { + return Field::unpack(to, from, param_data, low_byte_first); + } }; @@ -760,6 +865,45 @@ public: uint32 pack_length() const { return 4; } void sql_type(String &str) const; uint32 max_display_length() { return MY_INT32_NUM_DECIMAL_DIGITS; } + virtual uchar *pack(uchar* to, const uchar *from, + uint max_length, bool low_byte_first) + { + int32 val; +#ifdef WORDS_BIGENDIAN + if (table->s->db_low_byte_first) + val = sint4korr(from); + else +#endif + longget(val, from); + +#ifdef WORDS_BIGENDIAN + if (low_byte_first) + int4store(to, val); + else +#endif + longstore(to, val); + return to + sizeof(val); + } + + virtual const uchar *unpack(uchar* to, const uchar *from, + uint param_data, bool low_byte_first) + { + int32 val; +#ifdef WORDS_BIGENDIAN + if (low_byte_first) + val = sint4korr(from); + else +#endif + longget(val, from); + +#ifdef WORDS_BIGENDIAN + if (table->s->db_low_byte_first) + int4store(to, val); + else +#endif + longstore(to, val); + return from + sizeof(val); + } }; @@ -802,6 +946,45 @@ public: void sql_type(String &str) const; bool can_be_compared_as_longlong() const { return TRUE; } uint32 max_display_length() { return 20; } + virtual uchar *pack(uchar* to, const uchar *from, + uint max_length, bool low_byte_first) + { + int64 val; +#ifdef WORDS_BIGENDIAN + if (table->s->db_low_byte_first) + val = sint8korr(from); + else +#endif + longlongget(val, from); + +#ifdef WORDS_BIGENDIAN + if (low_byte_first) + int8store(to, val); + else +#endif + longlongstore(to, val); + return to + sizeof(val); + } + + virtual const uchar *unpack(uchar* to, const uchar *from, + uint param_data, bool low_byte_first) + { + int64 val; +#ifdef WORDS_BIGENDIAN + if (low_byte_first) + val = sint8korr(from); + else +#endif + longlongget(val, from); + +#ifdef WORDS_BIGENDIAN + if (table->s->db_low_byte_first) + int8store(to, val); + else +#endif + longlongstore(to, val); + return from + sizeof(val); + } }; #endif @@ -1176,9 +1359,10 @@ public: int cmp(const uchar *,const uchar *); void sort_string(uchar *buff,uint length); void sql_type(String &str) const; - uchar *pack(uchar *to, const uchar *from, uint max_length=~(uint) 0); - virtual const uchar *unpack(uchar* to, const uchar *from, uint param_data); - const uchar *unpack(uchar* to, const uchar *from); + virtual uchar *pack(uchar *to, const uchar *from, + uint max_length, bool low_byte_first); + virtual const uchar *unpack(uchar* to, const uchar *from, + uint param_data, bool low_byte_first); int pack_cmp(const uchar *a,const uchar *b,uint key_length, my_bool insert_or_update); int pack_cmp(const uchar *b,uint key_length,my_bool insert_or_update); @@ -1250,13 +1434,15 @@ public: uint get_key_image(uchar *buff,uint length, imagetype type); void set_key_image(const uchar *buff,uint length); void sql_type(String &str) const; - uchar *pack(uchar *to, const uchar *from, uint max_length=~(uint) 0); - uchar *pack_key(uchar *to, const uchar *from, uint max_length); + virtual uchar *pack(uchar *to, const uchar *from, + uint max_length, bool low_byte_first); + uchar *pack_key(uchar *to, const uchar *from, uint max_length, bool low_byte_first); uchar *pack_key_from_key_image(uchar* to, const uchar *from, - uint max_length); - virtual const uchar *unpack(uchar* to, const uchar *from, uint param_data); - const uchar *unpack(uchar* to, const uchar *from); - const uchar *unpack_key(uchar* to, const uchar *from, uint max_length); + uint max_length, bool low_byte_first); + virtual const uchar *unpack(uchar* to, const uchar *from, + uint param_data, bool low_byte_first); + const uchar *unpack_key(uchar* to, const uchar *from, + uint max_length, bool low_byte_first); int pack_cmp(const uchar *a, const uchar *b, uint key_length, my_bool insert_or_update); int pack_cmp(const uchar *b, uint key_length,my_bool insert_or_update); @@ -1346,7 +1532,7 @@ public: uint32 pack_length_no_ptr() const { return (uint32) (packlength); } uint32 sort_length() const; - inline uint32 max_data_length() const + virtual uint32 max_data_length() const { return (uint32) (((ulonglong) 1 << (packlength*8)) -1); } @@ -1374,13 +1560,13 @@ public: @retval The length in the row plus the size of the data. */ uint32 get_packed_size(const uchar *ptr_arg, bool low_byte_first) - {return packlength + get_length(ptr_arg, low_byte_first);} + {return packlength + get_length(ptr_arg, packlength, low_byte_first);} inline uint32 get_length(uint row_offset= 0) - { return get_length(ptr+row_offset, table->s->db_low_byte_first); } - uint32 get_length(const uchar *ptr, bool low_byte_first); + { return get_length(ptr+row_offset, this->packlength, table->s->db_low_byte_first); } + uint32 get_length(const uchar *ptr, uint packlength, bool low_byte_first); uint32 get_length(const uchar *ptr_arg) - { return get_length(ptr_arg, table->s->db_low_byte_first); } + { return get_length(ptr_arg, this->packlength, table->s->db_low_byte_first); } void put_length(uchar *pos, uint32 length); inline void get_ptr(uchar **str) { @@ -1421,13 +1607,16 @@ public: memcpy_fixed(ptr+packlength,&tmp,sizeof(char*)); return 0; } - uchar *pack(uchar *to, const uchar *from, uint max_length= ~(uint) 0); - uchar *pack_key(uchar *to, const uchar *from, uint max_length); + virtual uchar *pack(uchar *to, const uchar *from, + uint max_length, bool low_byte_first); + uchar *pack_key(uchar *to, const uchar *from, + uint max_length, bool low_byte_first); uchar *pack_key_from_key_image(uchar* to, const uchar *from, - uint max_length); - virtual const uchar *unpack(uchar *to, const uchar *from, uint param_data); - const uchar *unpack(uchar *to, const uchar *from); - const uchar *unpack_key(uchar* to, const uchar *from, uint max_length); + uint max_length, bool low_byte_first); + virtual const uchar *unpack(uchar *to, const uchar *from, + uint param_data, bool low_byte_first); + const uchar *unpack_key(uchar* to, const uchar *from, + uint max_length, bool low_byte_first); int pack_cmp(const uchar *a, const uchar *b, uint key_length, my_bool insert_or_update); int pack_cmp(const uchar *b, uint key_length,my_bool insert_or_update); @@ -1572,6 +1761,7 @@ public: enum_field_types type() const { return MYSQL_TYPE_BIT; } enum ha_base_keytype key_type() const { return HA_KEYTYPE_BIT; } uint32 key_length() const { return (uint32) (field_length + 7) / 8; } + uint32 max_data_length() const { return (field_length + 7) / 8; } uint32 max_display_length() { return field_length; } uint size_of() const { return sizeof(*this); } Item_result result_type () const { return INT_RESULT; } @@ -1602,9 +1792,10 @@ public: uint32 pack_length() const { return (uint32) (field_length + 7) / 8; } uint32 pack_length_in_rec() const { return bytes_in_rec; } void sql_type(String &str) const; - uchar *pack(uchar *to, const uchar *from, uint max_length=~(uint) 0); - virtual const uchar *unpack(uchar *to, const uchar *from, uint param_data); - const uchar *unpack(uchar* to, const uchar *from); + virtual uchar *pack(uchar *to, const uchar *from, + uint max_length, bool low_byte_first); + virtual const uchar *unpack(uchar *to, const uchar *from, + uint param_data, bool low_byte_first); virtual void set_default(); Field *new_key_field(MEM_ROOT *root, struct st_table *new_table, |