Data Pumpによるゴミデータ? - しょうたろー日記 は↓で解決。
2011-07-11 20:30:22 via Echofon to @sho_ishi
Step 04: Check for existing data pump jobs by query issued in step 01. If objects are in recyclebin bin then purge the objects from the recyclebin.
SQL> SELECT owner_name, job_name, operation, job_mode, state, attached_sessions from dba_datapump_jobs;
no rows selected
SQL> purge table system.SYS_EXPORT_SCHEMA_01;
Table purged.
ちなみに、今度やるときは
drop table SYS_IMPORT_TABLE_01 purge
という感じでpurgeを付けると大丈夫。
#別環境で実証完了