3.120 ALL_TABLES

ALL_TABLES describes the relational tables accessible to the current user. To gather statistics for this view, use the DBMS_STATS package.

Related Views

  • DBA_TABLES describes all relational tables in the database.

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

Note:

Columns marked with an asterisk (*) are populated only if you collect statistics on the table with the DBMS_STATS package.

Column Datatype NULL Description

OWNER

VARCHAR2(128)

NOT NULL

Owner of the table

TABLE_NAME

VARCHAR2(128)

NOT NULL

Name of the table

TABLESPACE_NAME

VARCHAR2(30)

Name of the tablespace containing the table; NULL for partitioned, temporary, and index-organized tables

CLUSTER_NAME

VARCHAR2(128)

Name of the cluster, if any, to which the table belongs

IOT_NAME

VARCHAR2(128)

Name of the index-organized table, if any, to which the overflow or mapping table entry belongs. If the IOT_TYPE column is not NULL, then this column contains the base table name.

STATUS

VARCHAR2(8)

If a previous DROP TABLE operation failed, indicates whether the table is unusable (UNUSABLE) or valid (VALID)

PCT_FREE

NUMBER

Minimum percentage of free space in a block; NULL for partitioned tables

PCT_USED

NUMBER

Minimum percentage of used space in a block; NULL for partitioned tables

INI_TRANS

NUMBER

Initial number of transactions; NULL for partitioned tables

MAX_TRANS

NUMBER

Maximum number of transactions; NULL for partitioned tables

INITIAL_EXTENT

NUMBER

Size of the initial extent (in bytes); NULL for partitioned tables

NEXT_EXTENT

NUMBER

Size of secondary extents (in bytes); NULL for partitioned tables

MIN_EXTENTS

NUMBER

Minimum number of extents allowed in the segment; NULL for partitioned tables

MAX_EXTENTS

NUMBER

Maximum number of extents allowed in the segment; NULL for partitioned tables

PCT_INCREASE

NUMBER

Percentage increase in extent size; NULL for partitioned tables

FREELISTS

NUMBER

Number of process freelists allocated to the segment; NULL for partitioned tables

FREELIST_GROUPS

NUMBER

Number of freelist groups allocated to the segment; NULL for partitioned tables

LOGGING

VARCHAR2(3)

Indicates whether or not changes to the table are logged; NULL for partitioned tables:

  • YES

  • NO

BACKED_UP

VARCHAR2(1)

Indicates whether the table has been backed up since the last modification (Y) or not (N)

NUM_ROWS*

NUMBER

Number of rows in the table

BLOCKS*

NUMBER

Number of used data blocks in the table

EMPTY_BLOCKS

NUMBER

Number of empty (never used) data blocks in the table. This column is populated only if you collect statistics on the table using the DBMS_STATS package.

AVG_SPACE*

NUMBER

Average amount of free space, in bytes, in a data block allocated to the table

CHAIN_CNT*

NUMBER

Number of rows in the table that are chained from one data block to another, or which have migrated to a new block, requiring a link to preserve the old ROWID

AVG_ROW_LEN*

NUMBER

Average length of a row in the table (in bytes)

AVG_SPACE_FREELIST_BLOCKS

NUMBER

Average freespace of all blocks on a freelist

NUM_FREELIST_BLOCKS

NUMBER

Number of blocks on the freelist

DEGREE

VARCHAR2(10)

Number of threads per instance for scanning the table, or DEFAULT

INSTANCES

VARCHAR2(10)

Number of instances across which the table is to be scanned, or DEFAULT

CACHE

VARCHAR2(5)

Indicates whether the table is to be cached in the buffer cache (Y) or not (N)

TABLE_LOCK

VARCHAR2(8)

Indicates whether table locking is enabled (ENABLED) or disabled (DISABLED)

SAMPLE_SIZE

NUMBER

Sample size used in analyzing the table

LAST_ANALYZED

DATE

Date on which the table was most recently analyzed

PARTITIONED

VARCHAR2(3)

Indicates whether the table is partitioned (YES) or not (NO)

IOT_TYPE

VARCHAR2(12)

If the table is an index-organized table, then IOT_TYPE is IOT, IOT_OVERFLOW, or IOT_MAPPING. If the table is not an index-organized table, then IOT_TYPE is NULL.

TEMPORARY

VARCHAR2(1)

Indicates whether the table is temporary (Y) or not (N)

SECONDARY

VARCHAR2(1)

Indicates whether the table is a secondary object created by the ODCIIndexCreate method of the Oracle Data Cartridge (Y) or not (N)

NESTED

VARCHAR2(3)

Indicates whether the table is a nested table (YES) or not (NO)

BUFFER_POOL

VARCHAR2(7)

Buffer pool for the table; NULL for partitioned tables:

  • DEFAULT

  • KEEP

  • RECYCLE

  • NULL

FLASH_CACHE

VARCHAR2(7)

Database Smart Flash Cache hint to be used for table blocks:

  • DEFAULT

  • KEEP

  • NONE

Solaris and Oracle Linux functionality only.

CELL_FLASH_CACHE

VARCHAR2(7)

Cell flash cache hint to be used for table blocks:

  • DEFAULT

  • KEEP

  • NONE

See Also: Oracle Exadata Storage Server Software documentation for more information

ROW_MOVEMENT

VARCHAR2(8)

Indicates whether partitioned row movement is enabled (ENABLED) or disabled (DISABLED)

GLOBAL_STATS

VARCHAR2(3)

GLOBAL_STATS will be YES if statistics are gathered or incrementally maintained, otherwise it will be NO

USER_STATS

VARCHAR2(3)

Indicates whether statistics were entered directly by the user (YES) or not (NO)

DURATION

VARCHAR2(15)

Indicates the duration of a temporary table:

  • SYS$SESSION - Rows are preserved for the duration of the session

  • SYS$TRANSACTION - Rows are deleted after COMMIT

Null - Permanent table

SKIP_CORRUPT

VARCHAR2(8)

Indicates whether Oracle Database ignores blocks marked corrupt during table and index scans (ENABLED) or raises an error (DISABLED). To enable this feature, run the DBMS_REPAIR.SKIP_CORRUPT_BLOCKS procedure.

MONITORING

VARCHAR2(3)

This column is obsolete

CLUSTER_OWNER

VARCHAR2(128)

Owner of the cluster, if any, to which the table belongs

DEPENDENCIES

VARCHAR2(8)

Indicates whether row-level dependency tracking is enabled (ENABLED) or disabled (DISABLED)

COMPRESSION

VARCHAR2(8)

Indicates whether table compression is enabled (ENABLED) or not (DISABLED); NULL for partitioned tables

COMPRESS_FOR

VARCHAR2(30)

Default compression for what kind of operations:

  • BASIC

  • ADVANCED

  • QUERY LOW

  • QUERY HIGH

  • ARCHIVE LOW

  • ARCHIVE HIGH

  • QUERY LOW ROW LEVEL LOCKING

  • QUERY HIGH ROW LEVEL LOCKING

  • ARCHIVE LOW ROW LEVEL LOCKING

  • ARCHIVE HIGH ROW LEVEL LOCKING

  • NO ROW LEVEL LOCKING

  • NULL

The QUERY LOW, QUERY HIGH, ARCHIVE LOW, ARCHIVE HIGH, QUERY LOW ROW LEVEL LOCKING, QUERY HIGH ROW LEVEL LOCKING, ARCHIVE LOW ROW LEVEL LOCKING, ARCHIVE HIGH ROW LEVEL LOCKING, and NO ROW LEVEL LOCKING values are associated with Hybrid Columnar Compression, a feature of the Enterprise Edition of Oracle Database that is dependent on the underlying storage system. See Oracle Database Concepts for more information.

DROPPED

VARCHAR2(3)

Indicates whether the table has been dropped and is in the recycle bin (YES) or not (NO); NULL for partitioned tables

This view does not return the names of tables that have been dropped.

READ_ONLY

VARCHAR2(3)

Indicates whether the table segment is READ-ONLY or not. Possible values:

  • YES - The table segment is READ-ONLY

  • NO - The table segment is not READ-ONLY

  • N/A - Not applicable. This value appears in a partitioned table, where there is no segment that relates to the logical table object.

SEGMENT_CREATED

VARCHAR2(3)

Indicates whether the table segment is created. Possible values:

  • YES - The table segment is created.

  • NO - The table segment is not created.

  • N/A - Not applicable. This value appears in a partitioned table, where there is no segment that relates to the logical table object.

RESULT_CACHE

VARCHAR2(7)

Result cache mode annotation for the table:

  • DEFAULT - Table has not been annotated

  • FORCE

  • MANUAL

CLUSTERING

VARCHAR2(3)

Indicates whether the table has the attribute clustering clause (YES) or not (NO)

ACTIVITY_TRACKING

VARCHAR2(23)

Indicates whether Heat Map tracking is enabled on the table

DML_TIMESTAMP

VARCHAR2(25)

Modification time, creation time, or both for Automatic Data Optimization

HAS_IDENTITY

VARCHAR2(3)

Indicates whether the table has an identity column (YES) or not (NO)

CONTAINER_DATA

VARCHAR2(3)

Indicates whether the table contains container-specific data. Possible values:

  • YES if the table was created with the CONTAINER_DATA clause

  • NO otherwise

INMEMORY

VARCHAR2(8)

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

INMEMORY_PRIORITY

VARCHAR2(8)

Indicates the priority for In-Memory Column Store (IM column store) population. Possible values:

  • LOW

  • MEDIUM

  • HIGH

  • CRITICAL

  • NONE

  • NULL

INMEMORY_DISTRIBUTE

VARCHAR2(15)

Indicates how the IM column store is distributed in an Oracle Real Application Clusters (Oracle RAC) environment:

  • AUTO

  • BY ROWID RANGE

  • DUPLICATE

  • NONE

  • NULL

INMEMORY_COMPRESSION

VARCHAR2(17)

Indicates the compression level for the IM column store:

  • BASIC

  • 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_TABLES but non-NULL for ALL_TAB_PARTITIONS.

INMEMORY_DUPLICATE

VARCHAR2(13)

Indicates the duplicate setting for the IM column store in an Oracle RAC environment:

  • NO DUPLICATE

  • DUPLICATE

  • DUPLICATE ALL

DEFAULT_COLLATION

VARCHAR2(100)

Default collation for the table

DUPLICATED

VARCHAR2(1)

Indicates whether the table is duplicated on this shard (Y) or not (N)

SHARDED

VARCHAR2(1)

Indicates whether the table is sharded (Y) or not (N)

EXTERNAL

VARCHAR2(3)

Indicates whether the table is an external table (YES) or not (NO)

HYBRIDFoot 1

VARCHAR2(3)

Indicates whether the table is a hybrid partitioned table (YES) or not (NO). A hybrid partitioned table can contain a mixture of partitions stored in segments and partitions stored externally.

CELLMEMORY

VARCHAR2(24)

The value for columnar compression in the storage cell flash cache. Possible values:

  • ENABLED: Oracle Exadata Storage will decide automatically whether to cache in columnar form

  • DISABLED: Oracle Exadata Storage is prevented from caching in columnar form

  • NO CACHECOMPRESS: Oracle Exadata Storage will cache in HCC format (no recompression)

  • FOR QUERY: Oracle Exadata Storage will recompress and cache in INMEMORY query high format

  • FOR CAPACITY: Oracle Exadata Storage will recompress and cache in INMEMORY capacity low format

This column is intended for use with Oracle Exadata.

CONTAINERS_DEFAULT

VARCHAR2(3)

Indicates whether the table is enabled for CONTAINERS() by default (YES) or not (NO)

CONTAINER_MAP

VARCHAR2(3)

Indicates whether the table is enabled for use with the container_map database property (YES) or not (NO)

EXTENDED_DATA_LINK

VARCHAR2(3)

Indicates whether the table is enabled for fetching an extended data link from the root (YES) or not (NO)

EXTENDED_DATA_LINK_MAP

VARCHAR2(3)

For internal use only

INMEMORY_SERVICE

VARCHAR2(12)

Indicates how the IM column store is populated on various instances. The possible values are:

  • DEFAULT: Data is populated on all instances specified with the PARALLEL_INSTANCE_GROUP initialization parameter. If that parameter is not set, then the data is populated on all instances. This is the default.

  • NONE: Data is not populated on any instance.

  • ALL: Data is populated on all instances, regardless of the value of the PARALLEL_INSTANCE_GROUP initialization parameter.

  • USER_DEFINED: Data is populated only on the instances on which the user-specified service is active. The service name corresponding to this is stored in the INMEMORY_SERVICE_NAME column.

INMEMORY_SERVICE_NAME

VARCHAR2(1000)

Indicates the service name for the service on which the IM column store should be populated. This column has a value only when the corresponding INMEMORY_SERVICE is USER_DEFINED. In all other cases, this column is null.

CONTAINER_MAP_OBJECT

VARCHAR2(3)

Indicates whether the table is used as the value of the container_map database property (YES) or not (NO)

MEMOPTIMIZE_READ

VARCHAR2(8)

Indicates whether the table is enabled for Fast Key Based Access (ENABLED) or not (DISABLED)

MEMOPTIMIZE_WRITE

VARCHAR2(8)

For internal use only

HAS_SENSITIVE_COLUMN

VARCHAR2(3)

Indicates whether the table has one or more sensitive columns (YES) or not (NO)

ADMIT_NULLFoot 1

VARCHAR2(3)

Indicates whether the table admits null CON_ID data (YES) or not (NO)

DATA_LINK_DML_ENABLEDFoot 1

VARCHAR2(3)

Indicates whether DML is permitted on the Data Link table (YES) or not (NO)

LOGICAL_REPLICATIONFoot 1

VARCHAR2(8)

Indicates whether the table is enabled for logical replication (ENABLED) or not (DISABLED). This setting is ignored if database-wide column data supplemental logging is enabled.

Footnote 1 This column is available starting with Oracle Database 19c.

Examples

This SQL query returns the names of the tables in the EXAMPLES tablespace: 

SELECT table_name FROM all_tables
WHERE tablespace_name = 'EXAMPLE' ORDER BY table_name;

This SQL query returns the name of the tablespace that contains the HR schema:

SELECT DISTINCT tablespace_name FROM all_tables WHERE owner='HR';

See Also: