Generate the DDL - change is a new column and I want to generate an alter table.
All, morningI searched and searched all over the Data Modeler and I can't find this option... but I found it easily in the designer.
I hope you can help me.
V3.0.0.665 SQL Developer Data Modeler.
I added a new column to a table, and when I generate the DDL I wish it were an alter table add column rather than a table to create.
This feature is in the designer, so I think it would be in the Data Modeler.
Just in case my description isn't clear, here are the high level steps, then it is clear.
1 create logic model
2. create the relational logic.
3. create the physical relationship.
4 generate the DDL and run in the database. At this point, I'm going to production with my system, and all right.
5. at this point, we have an enhancement request. For the model, it will be a new column in a table.
6. update of the logic model.
7. relational update logic
8 physical update of relational
9 generate the DDL. Here, I would have generate it know that it needs to generate an alter table add column and does not create the table.
This is something I do a lot as all my models are in production. I can't find how to do this step to get data Modeler to generate the altar.
Designer done exceptionally well.
Quite often, it is more than a single column. Changes can be many and made over time and at the time of generating the DDL you remember not every single amendment. To have the tool discover these changes for you and generate the appropriate DDL is a feature that I consider as very high.
I hope that is clear and you can help me.
See you soon
Chris...
Hi Chris,
you need to compare your model on database - database relational model even import and use the option 'swap target' - in this case 'expressions of alter' against the database will be generated.
You can watch demonstrations here http://www.oracle.com/technetwork/developer-tools/datamodeler/demonstrations-224554.html
It would probably be more useful http://download.oracle.com/otn_hosted_doc/sqldev/importddl/importddl.html
Sooner or later your changes will require the table to be recreated, and you will need to backup your data - you can consider using the 'Advanced DDL' option - script is generated that will land your table content (including LOBs) to the system of files accessible from the database and restore after changes. Well not try directly on the production system :).
Philippe
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