How to copy one schema into another

Question

I need to copy one schema into another. That means, all the tables, views, constraints, etc, and all the data as well.
I have a dmp file of source-schema (created daily with expdp by our backup schedule).
Can I use impdp to import this dmp file into dest-schema? I'm thinking about something like this:
The dmp file was created with:
expdp source-schema/pwd DIRECTORY=dmpdir DUMPFILE=myproject.dmp
Create the copy on dest-schema with:
impdp dest-schema/pwd DIRECTORY=dmpdir DUMPFILE=myproject.dmp
(dest-schema is an existing schema on the same machine. I'll drop all the tables before executing the command. Is there anything else I should do first?)
If this approach is not feasible, kindly suggest me an alternative.
Thank you.
Edited by: mgro on Apr 16, 2010 3:22 AM (changed 2nd command: expdp to impdp)

Answer 1

Thank you both. Dean, I've made a note of your proposed command. May use it next time.
In the end I used the following command and it worked for me. I added TABLE_EXISTS_ACTION=REPLACE since the destination was not empty.
First I ran these command logged in as SYS
GRANT Import Full Database TO dest-schema;
GRANT Create Any Directory TO dest-schema;
GRANT Unlimited Tablespace TO dest-schema;
impdp
dest-schema/pwd
DIRECTORY=dmpdir
DUMPFILE=myproject.dmp
REMAP_SCHEMA=source-schema:dest-schema
TABLE_EXISTS_ACTION=REPLACE
LOGFILE=implog.log
There were some errors though. The import process complained about constraints referencing non-existent primary keys.
It turns out that the source schema has some constraints that are marked with status DISABLED. These constraints either:
- are not part of the DUMP file
or
- are in the DUMP file but skipped during import
Don't know if this is a bug or by design behavior.