Results of database comparison operations ¶
Whenever a database structure comparison is done, it is likely that differences are detected, that have no real background. The unsigned attribute used with integer fields in MySQL for instance has no equivalent in PostgreSQL. Thus if a change is suggested that would solely try to add this attribute, just ignore it. To make this easier the changes that are usually preselected in the install tool are not, when the DBAL extension is detected.
Similar “errors” will be detected for certain field types and probably keys/indexes. You have to use common sense and your DB background knowledge to move around those issues.
On some databases you might even see keys that should be dropped or created, most of the time this is bogus, too.