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Oracle Data Pump Schema Export and Public Synonyms

While testing a migration today with one of our clients, I figured out that schema export using Data Pump doesn’t capture public synonyms on the objects in this schema.  Update: This is actually the same behavior as old Export utility.

I can think of two workarounds:

  • Use Data Pump to export/import public schema including only synonyms but I couldn’t think of an easy way to filter only public synonyms on objects in specified schemas.
  • Generate a script that creates public synonyms. You can run the following on the source database, for example:
SELECT 'CREATE PUBLIC SYNONYM ' || synonym_name || ' FOR '
|| table_owner || '.' || table_name || ';' cmd
FROM dba_synonyms
WHERE TABLE_OWNER IN ([list of schemas]) AND owner='PUBLIC';

Does anyone know how to make Data Pump include public synonyms with schema export?

Thanks to Paul for Export behavior correction. Also see below Andrew’s more complete version of the query including database links.

Concerned which objects are exported by Data Pump on full, schema, and table levels? Check views – DATABASE_EXPORT_OBJECTS, SCHEMA_EXPORT_OBJECTS, and TABLE_EXPORT_OBJECTS.

I still couldn’t get Data Pump filter out only synonyms I need. So far the best I’ve come up with:
INCLUDE=SYNONYM:"IN (SELECT synonym_name FROM dba_synonyms WHERE table_owner='TEST')"
However, this also captures private synonyms that happen to have the same name.

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