Saturday, September 24, 2011

Explained: TABLESPACES,TRANSPORT_TABLESPACES,TRANSPORT_FULL_CHECK


Since all the above parameters are used in conjunction we should know the functionality of each of them.

TABLESPACES:In tablespace mode, only the tables contained in a specified set of tablespaces are unloaded. If a table is unloaded, its dependent objects are also unloaded.

TRANSPORT_TABLESPACES:Use this parameter to specify a list of tablespace names for which object metadata will be exported from the source database into the target database.

TRANSPORT_FULL_CHECK:Specifies whether or not to check for dependencies between those objects inside the transportable set and those outside the transportable set. This parameter is applicable only to a transportable-tablespace mode export.

TRANSPORT_FULL_CHECK={y | n}

If TRANSPORT_FULL_CHECK=y, then Export verifies that there are no dependencies between those objects inside the transportable set and those outside the transportable set. The check addresses two-way dependencies. For example, if a table is inside the transportable set but its index is not, a failure is returned and the export operation is terminated. Similarly, a failure is also returned if an index is in the transportable set but the table is not.

If TRANSPORT_FULL_CHECK=n, then Export verifies only that there are no objects within the transportable set that are dependent on objects outside the transportable set. This check addresses a one-way dependency. For example, a table is not dependent on an index, but an index is dependent on a table, because an index without a table has no meaning. Therefore, if the transportable set contains a table, but not its index, then this check succeeds. However, if the transportable set contains an index, but not the table, the export operation is terminated.

HTH:-)

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