The length of the table name list specified for the TABLES parameter is limited to a maximum of 4 MB, unless you are using the NETWORK_LINK parameter to an Oracle Database release 10.2.0.3 or earlier or to a read-only database. In such cases, the limit is 4 KB.
maximum of 4 MB, unless you are using the NETWORK_LINK parameter to an Oracle
Database release 10.2.0.3 or earlier or to a read-only database. In such cases, the
limit is 4 KB.