datapump import schema and default values taken from a sequence

we are using the DataPump API to clone schemas for testing purposes.

However, DataPump fails to import tables that use "DEFAULT ON NULL" based on a sequence, as it does not remap the owner of the sequence reference in the table's ddl.

For example: as the user THOMAS I run the following statements:

    create sequence my_table_id_seq;

    create table my_table
    (
      id number default on null my_table_id_seq.nextval     );

This stores "THOMAS"."MY_TABLE_ID_SEQ"."NEXTVAL" as the "default value" for the column ID.

If we use dbms_datapump.copy_schema() to clone the schema THOMAS to the schema ARTHUR using the remap_schema option for METADATA_REMAP(), then DataPump will run the following statements:

    CREATE SEQUENCE "ARTHUR"."MY_TABLE_ID_SEQ";     CREATE TABLE "ARTHUR"."MY_TABLE"

     (	"ID" NUMBER DEFAULT ON NULL "THOMAS"."MY_TABLE_ID_SEQ"."NEXTVAL" NOT NULL ENABLE
     ) 

So my question is:

Is there any way to tell DataPump to replace the reference to "THOMAS"."MY_TABLE_ID_SEQ" with the target schema: "ARTHUR"."MY_TABLE_ID_SEQ"?

Or is there any other way to clone a schema so that the above situation would be resolved? (In the long run, we might use PDBs instead of schemas, but for now this is not an option).

We are using Oracle 18c.

Regards
Thomas Kellerer

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