diff options
Diffstat (limited to 'sql/field.cc')
| -rw-r--r-- | sql/field.cc | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/sql/field.cc b/sql/field.cc index bd091f7eb57..fcabaeaa74d 100644 --- a/sql/field.cc +++ b/sql/field.cc @@ -8464,14 +8464,20 @@ bool Field_num::eq_def(Field *field) } +/** + Check whether two numeric fields can be considered 'equal' for table + alteration purposes. Fields are equal if they are of the same type + and retain the same pack length. +*/ + uint Field_num::is_equal(Create_field *new_field) { return ((new_field->sql_type == real_type()) && - ((new_field->flags & UNSIGNED_FLAG) == (uint) (flags & - UNSIGNED_FLAG)) && + ((new_field->flags & UNSIGNED_FLAG) == + (uint) (flags & UNSIGNED_FLAG)) && ((new_field->flags & AUTO_INCREMENT_FLAG) == (uint) (flags & AUTO_INCREMENT_FLAG)) && - (new_field->length <= max_display_length())); + (new_field->pack_length == pack_length())); } |