diff options
Diffstat (limited to 'sql/field.h')
| -rw-r--r-- | sql/field.h | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/sql/field.h b/sql/field.h index 3aeb5e03259..0bbcd1099a0 100644 --- a/sql/field.h +++ b/sql/field.h @@ -124,7 +124,7 @@ public: static bool type_can_have_key_part(enum_field_types); static enum_field_types field_type_merge(enum_field_types, enum_field_types); static Item_result result_merge_type(enum_field_types); - bool eq(Field *field) + virtual bool eq(Field *field) { return (ptr == field->ptr && null_ptr == field->null_ptr && null_bit == field->null_bit); @@ -211,7 +211,8 @@ public: */ virtual bool can_be_compared_as_longlong() const { return FALSE; } virtual void free() {} - virtual Field *new_field(MEM_ROOT *root, struct st_table *new_table); + virtual Field *new_field(MEM_ROOT *root, struct st_table *new_table, + bool keep_type); virtual Field *new_key_field(MEM_ROOT *root, struct st_table *new_table, char *new_ptr, uchar *new_null_ptr, uint new_null_bit); @@ -815,7 +816,7 @@ public: if ((*null_value= is_null())) return 0; #ifdef WORDS_BIGENDIAN - if (table->s->db_low_byte_first) + if (table && table->s->db_low_byte_first) return sint4korr(ptr); #endif long tmp; @@ -1035,7 +1036,7 @@ public: enum_field_types real_type() const { return FIELD_TYPE_STRING; } bool has_charset(void) const { return charset() == &my_charset_bin ? FALSE : TRUE; } - Field *new_field(MEM_ROOT *root, struct st_table *new_table); + Field *new_field(MEM_ROOT *root, struct st_table *new_table, bool keep_type); }; @@ -1107,7 +1108,7 @@ public: enum_field_types real_type() const { return MYSQL_TYPE_VARCHAR; } bool has_charset(void) const { return charset() == &my_charset_bin ? FALSE : TRUE; } - Field *new_field(MEM_ROOT *root, struct st_table *new_table); + Field *new_field(MEM_ROOT *root, struct st_table *new_table, bool keep_type); Field *new_key_field(MEM_ROOT *root, struct st_table *new_table, char *new_ptr, uchar *new_null_ptr, uint new_null_bit); @@ -1375,6 +1376,13 @@ public: bit_ptr= bit_ptr_arg; bit_ofs= bit_ofs_arg; } + bool eq(Field *field) + { + return (Field::eq(field) && + field->type() == type() && + bit_ptr == ((Field_bit *)field)->bit_ptr && + bit_ofs == ((Field_bit *)field)->bit_ofs); + } }; |