How can we identify the location from which a map is run, in the map ?

Question

Hi,
I have a map that moves data from source system into the target system.
I have two locations in the project (PROD_SOURCE and PROD_TARGET).
My map picks the source table from PROD_SOURCE location and inserts into the target table in PROD_TARGET location.
Now, this map can be deployed by changing the source location.
In my map, I want to find out the location and subsequently the source database from which the map was run. This has to be inserted into a table
Any pointers?
-Pushkala

Answer 1

You can always query the data dictionary in a pre- or post- mapping procedure.
e.g.:
select dep.owner, dep.object_name
FROM PUBLIC_DEPENDENCY pd,
all_objects dep,
all_objects src
where pd.object_id = src.object_id
and pd.referenced_object_id = dep.object_id
and dep.object_Type = 'TABLE'
and src.owner = 'ERS_CTRL3X'
AND src.object_name = 'TEST_MAP'
AND src.object_type = 'PACKAGE BODY'
will give me the listed owner of all tables referenced in this mapping. Knowing the table name, I would have access to the owner name. Now, whether you also will need to query agains all_db_links to see where a given db link is pointing to resolve the owner etc, or all_synonyms to resolve local synonyms to the db_link that they operate against etc I do not know. But tracing the dependancy tree from the current runtime copy of the package will get you to what you need.