Db Structure Changes

Hey there,

I have a question regarding about db.
Does cuba able to lock any changes being done to the db structure such as alter table or column moditifaction



I think not - this is a software development environment where one wants to be able to have database changes during the development.
For production environments, your requirement is achieved by creating appropriate database user groups with access to what they need to have.
Sometimes, this is done for the development, too.
For example, if you are using PostgreSQL database check this https://wiki.postgresql.org/images/d/d1/Managing_rights_in_postgresql.pdf