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  • OCP-1Z0-052-V8.02-100题

    100. In which situations does the Oracle Data Pump use external tables and not the direct path load while

    exporting a table? (Choose all that apply.)

    A.if a table is not in a cluster

    B.if a table has an active trigger

    C.if a table has an encrypted

    D.if a table has a column of data type LONG defined on it

    E.if a table has a referential integrity constraint defined on it  

    Answer: BCE  

    答案解析:

    参考:http://docs.oracle.com/cd/E11882_01/server.112/e22490/dp_overview.htm#SUTIL2879



    Situations in Which Direct Path Load Is Not Used

    If any of the following conditions exist for a table, then Data Pump uses external tables rather than direct path to load the data for that table:

    • A global index on multipartition tables exists during a single-partition load. This includes object tables that are partitioned.

    • A domain index exists for a LOB column.

    • A table is in a cluster.

    • There is an active trigger on a preexisting table.

    • Fine-grained access control is enabled in insert mode on a preexisting table.

    • A table contains BFILE columns or columns of opaque types.

    • A referential integrity constraint is present on a preexisting table.

    • A table contains VARRAY columns with an embedded opaque type.

    • The table has encrypted columns.

    • The table into which data is being imported is a preexisting table and at least one of the following conditions exists:

      • There is an active trigger

      • The table is partitioned

      • Fine-grained access control is in insert mode

      • A referential integrity constraint exists

      • A unique index exists

    • Supplemental logging is enabled and the table has at least one LOB column.

    • The Data Pump command for the specified table used the QUERYSAMPLE, or REMAP_DATA parameter.

    • A table contains a column (including a VARRAY column) with a TIMESTAMP WITH TIME ZONE datatype and the version of the time zone data file is different between the export and import systems.

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  • 原文地址:https://www.cnblogs.com/hzcya1995/p/13316353.html
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