2.138 ALL_EXTERNAL_TABLES

ALL_EXTERNAL_TABLES describes the external tables accessible to the current user.

Related Views

  • DBA_EXTERNAL_TABLES describes all external tables in the database.

  • USER_EXTERNAL_TABLES describes the external tables owned by the current user. This view does not display the OWNER column.

Column Datatype NULL Description

OWNER

VARCHAR2(128)

NOT NULL

Owner of the external table

TABLE_NAME

VARCHAR2(128)

NOT NULL

Name of the external table

TYPE_OWNER

CHAR(3)

Owner of the implementation type for the external table access driver

TYPE_NAME

VARCHAR2(128)

NOT NULL

Name of the implementation type for the external table access driver

DEFAULT_DIRECTORY_OWNER

CHAR(3)

Owner of the default directory for the external table

DEFAULT_DIRECTORY_NAME

VARCHAR2(128)

NOT NULL

Name of the default directory for the external table

REJECT_LIMIT

VARCHAR2(40)

Reject limit for the external table, or UNLIMITED

ACCESS_TYPE

VARCHAR2(7)

Type of access parameters for the external table:

  • BLOB

  • CLOB

ACCESS_PARAMETERS

CLOB

Access parameters for the external table

PROPERTY

VARCHAR2(10)

Property of the external table:

  • REFERENCED - Referenced columns

  • ALL - All columns

INMEMORY

VARCHAR2(8)

Indicates whether the In-Memory Column Store (IM column store) is enabled (ENABLED) or disabled (DISABLED) for this table

INMEMORY_COMPRESSION

VARCHAR2(17)

Indicates the compression level for the IM column store:

  • NO MEMCOMPRESS

  • FOR DML

  • FOR CAPACITY [ HIGH | LOW ]

  • FOR QUERY [ HIGH | LOW ]

  • NULL

This column has a value based on where the segments lie for a table. For example, if the table is partitioned and is enabled for the IM column store, the value is NULL for ALL_EXTERNAL_TABLES but non-NULL for ALL_XTERNAL_TAB_PARTITIONS.