Oracle Data Pump不使用直接路径加载的场景

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 QUERY, SAMPLE, 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.