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Don Burleson Blog 







ORA-31684 import error Tips

Oracle Database Tips by Donald BurlesonNovember 13, 2015

Question:  I am getting these ORA-31684 errors on my import (impdp) job:

ORA-31684: Object type SEQUENCE:"HSS"."LCM-MIGRATION_ID-SEQ" already exists
ORA-31684: Object type SEQUENCE:"HSS"."WKS_IDENTITY_SEQ" already exists

How can I get Oracle to ignore these "already exists" errors with the ORA-31684?

Answer:  You are getting the ORA-31684 errors because you have pre-created the user id in the schema.  Try using the exclude=user to the impdp (or expdp command), and this will ignore errors because user objects already exist.

Most DBA's let the impdp create the user, but you may want to change the tablespace names.  If so, you can use the remap_tablespace command (remap_tablespace=old_ts_name:new_ts_name)

For a ORA-31684 error on tables, you can use the table_exists_action parameter which tells Oracle to use the new DDL definitions instead of the DDL inside the import data file.

TABLE_EXISTS_ACTION={SKIP | APPEND | TRUNCATE | REPLACE} - Provides Data Pump Import with instructions to perform when it finds a table in the target database with the same name as a table contained in the input file.

TABLE_EXISTS_ACTION=SKIP - Existing tables are bypassed if they already exist. No action is taken.

TABLE_EXISTS_ACTION=APPEND -Data Pump Import will append rows to the existing table.

 TABLE_EXISTS_ACTION=TRUNCATE - Data Pump Import will truncate the existing table and load rows from the source.

TABLE_EXISTS_ACTION=REPLACE - Existing tables will be dropped, recreated and then loaded from the source.

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