ORA-26097 During Datapump Import when going from 11.2.0.3 back to 11.2.0.1

(Doc ID 1465339.1)

Last updated on JUNE 07, 2012

Applies to:

Oracle Server - Enterprise Edition - Version 11.2.0.1 to 11.2.0.3 [Release 11.2]
Information in this document applies to any platform.

Symptoms

1. ODSTEST dev database upgraded from 11.2.0.1 to 11.2.0.3 successfully.Meantime DST timezone also changed from 11 to 14 after the upgrade.
2. We wanted to downgrade the upgraded database 11.2.0.3 back to 11.2.0.1. So we decided to go with datapump export/import option and took the export using the expdp utility of 11.2.0.1 version.
3. Export was a full database export.
4. Deleted the current 11.2.0.3 database completely.
5. Restored the database 11.2.0.1 using cold backup.
6. Dropped the main schema ODSPRD on the database.
7. Using the export dump file taken from 11.2.0.3,I have imported to 11.2.0.1 database for the dropped ODSPRD schema.
8. Import was going perfectly all tables were imported except one table "NS_SCS_DELIVERY_TEMP" on the schema.

During the import of this table got errors:

ORA-31693: Table data object "ODSPRD"."NS_SCS_DELIVERY_TEMP" failed to load/unload and is being skipped due to error:
ORA-02354: error in exporting/importing data
ORA-26097: unsupported conversion for column SYS_NC0000400005$ (from type 58 to type 23)
During the import everything went fine except one table:

Tables involved for Export:

NS_SCS_DELIVERY_TEMP

DDL statement for the above table below:

CREATE TABLE "ODSPRD"."NS_SCS_DELIVERY_TEMP"
( "EXT_STORE_LOCATION_ID" NUMBER(10,0),
"IS_ACTIVE" VARCHAR2(1),
"SCS_DESCRIPTION" VARCHAR2(200),
"DELIVERIES" "ODSPRD"."DELIVERY_SCS"
) NESTED TABLE "DELIVERIES" STORE AS "NS_SCS_DELIVERY_TMP"

As you can see the above table structure, it's being created by the use of another nested table "NS_SCS_DELIVERY_TMP" and an object type "TYPE" "DELIVERIES"

NESTED TABLE=NS_SCS_DELIVERY_TMP
TYPE=DELIVERIES

Cause

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