Hello,

The method getAlterTableSQL on PostgreSQLPlatform does not perform changes on the column collation. This is because there are two bugs:

• First, Comparator::diffColumn() doesn't see the change due to a bug on the login when comparing the platform options. I have prepared a Pull request for this and I am going to send it in a minute.
• Second, whilst the addedColumns section of the getAlterTableSQL method on the PostgresSQLPlatform class calls getColumnDeclarationSQL which in turn returns the right collation, the changedColumns section of the same method doesn't. I am not sure how best to fix this, so I would appreciate if someone could give me an indication or fix it.

Thanks a lot.