2.78 ALL_CLUSTERING_TABLES

ALL_CLUSTERING_TABLES describes tables with an attribute clustering clause that are accessible to the user.

Related Views

  • DBA_CLUSTERING_TABLES describes all the tables with an attribute clustering clause.

  • USER_CLUSTERING_TABLES describes the tables with an attribute clustering clause owned by the user.

Column Datatype NULL Description

OWNER

VARCHAR2(128)

NOT NULL

Owner of the table

TABLE_NAME

VARCHAR2(128)

NOT NULL

Name of the table

CLUSTERING_TYPE

VARCHAR2(11)

Clustering type:

  • INTERLEAVED

  • LINEAR

ON_LOAD

VARCHAR2(3)

Indicates whether Oracle will cluster data on load (YES) or not (NO)

ON_DATAMOVEMENT

VARCHAR2(3)

Indicates whether Oracle will cluster data on data movement, for example, partition move (YES), or not (NO)

VALID

VARCHAR2(3)

Indicates if clustering is valid (YES) or not (NO).

For clustering with dimension tables, it is required that the joins of the fact table to the dimensions is via primary key or unique key on the dimension table. Therefore, dimension join keys must have a valid primary key or unique key constraint. If the primary key or unique key constraint is not valid, then clustering will not occur.

If there are no joins in the CLUSTERING clause, then the value of this column is YES.

WITH_ZONEMAP

VARCHAR2(3)

Indicates if a zonemap was created with clustering (YES) or not (NO).

LAST_LOAD_CLST

TIMESTAMP(6)

Last time the clustering occurred on load

LAST_DATAMOVE_CLST

TIMESTAMP(6)

Last time the clustering occurred on data movement, for example, partition move

See Also: