2.127 ALL_INDEXES

ALL_INDEXES describes the indexes on the tables accessible to the current user. To gather statistics for this view and the related views DBA_INDEXES and USER_INDEXES, use the DBMS_STATS package.

Related Views

  • DBA_INDEXES describes all indexes in the database.

  • USER_INDEXES describes the indexes owned by the current user. This view does not display the OWNER column.

Note:

Column names followed by an asterisk are populated only if you collect statistics on the index using the DBMS_STATS package.

Column Datatype NULL Description

OWNER

VARCHAR2(128)

NOT NULL

Owner of the index

INDEX_NAME

VARCHAR2(128)

NOT NULL

Name of the index

INDEX_TYPE

VARCHAR2(27)

 

Type of the index:

  • LOB

  • NORMAL

  • NORMAL/REV

  • BITMAP

  • FUNCTION-BASED NORMAL

  • FUNCTION-BASED NORMAL/REV

  • FUNCTION-BASED BITMAP

  • FUNCTION-BASED DOMAIN

  • CLUSTER

  • IOT - TOP

  • DOMAIN

TABLE_OWNER

VARCHAR2(128)

NOT NULL

Owner of the indexed object

TABLE_NAME

VARCHAR2(128)

NOT NULL

Name of the indexed object

TABLE_TYPE

CHAR(11)

 

Type of the indexed object:

  • NEXT OBJECT

  • INDEX

  • TABLE

  • CLUSTER

  • VIEW

  • SYNONYM

  • SEQUENCE

UNIQUENESS

VARCHAR2(9)

 

Indicates whether the index is unique (UNIQUE) or nonunique (NONUNIQUE)

COMPRESSION

VARCHAR2(13)

 

The type of compression being used for the index:

  • ADVANCED LOW - Advanced low compression

  • DISABLED - No compression is present

  • ENABLED - Prefix compression

PREFIX_LENGTH

NUMBER

 

Number of columns in the prefix of the compression key

TABLESPACE_NAME

VARCHAR2(30)

 

Name of the tablespace containing the index

INI_TRANS

NUMBER

 

Initial number of transactions

MAX_TRANS

NUMBER

 

Maximum number of transactions

INITIAL_EXTENT

NUMBER

 

Size of the initial extent

NEXT_EXTENT

NUMBER

 

Size of secondary extents

MIN_EXTENTS

NUMBER

 

Minimum number of extents allowed in the segment

MAX_EXTENTS

NUMBER

 

Maximum number of extents allowed in the segment

PCT_INCREASE

NUMBER

 

Percentage increase in extent size

PCT_THRESHOLD

NUMBER

 

Threshold percentage of block space allowed per index entry

INCLUDE_COLUMN

NUMBER

 

Column ID of the last column to be included in index-organized table primary key (non-overflow) index. This column maps to the COLUMN_ID column of the *_TAB_COLUMNS view.

FREELISTS

NUMBER

 

Number of process freelists allocated to this segment

FREELIST_GROUPS

NUMBER

 

Number of freelist groups allocated to this segment

PCT_FREE

NUMBER

 

Minimum percentage of free space in a block

LOGGING

VARCHAR2(3)

 

Indicates whether or not changes to the index are logged:

  • YES

  • NO

BLEVEL*

NUMBER

 

B*-Tree level (depth of the index from its root block to its leaf blocks). A depth of 0 indicates that the root block and leaf block are the same.

LEAF_BLOCKS*

NUMBER

 

Number of leaf blocks in the index

DISTINCT_KEYS*

NUMBER

 

Number of distinct indexed values. For indexes that enforce UNIQUE and PRIMARY KEY constraints, this value is the same as the number of rows in the table (*_TABLES.NUM_ROWS)

AVG_LEAF_BLOCKS_PER_KEY*

NUMBER

 

Average number of leaf blocks in which each distinct value in the index appears, rounded to the nearest integer. For indexes that enforce UNIQUE and PRIMARY KEY constraints, this value is always 1.

AVG_DATA_BLOCKS_PER_KEY*

NUMBER

 

Average number of data blocks in the table that are pointed to by a distinct value in the index rounded to the nearest integer. This statistic is the average number of data blocks that contain rows that contain a given value for the indexed columns.

CLUSTERING_FACTOR*

NUMBER

 

Indicates the amount of order of the rows in the table based on the values of the index.

  • If the value is near the number of blocks, then the table is very well ordered. In this case, the index entries in a single leaf block tend to point to rows in the same data blocks.

  • If the value is near the number of rows, then the table is very randomly ordered. In this case, it is unlikely that index entries in the same leaf block point to rows in the same data blocks.

For bitmap indexes, this column is not applicable.

STATUS

VARCHAR2(8)

 

Indicates whether a nonpartitioned index is VALID or UNUSABLE

NUM_ROWS

NUMBER

 

Number of rows in the index.

For bitmap indexes, this column is the number of distinct keys, so its value is the same as the DISTINCT_KEYS column.

SAMPLE_SIZE

NUMBER

 

Size of the sample used to analyze the index

LAST_ANALYZED

DATE

 

Date on which this index was most recently analyzed

DEGREE

VARCHAR2(40)

 

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

INSTANCES

VARCHAR2(40)

 

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

PARTITIONED

VARCHAR2(3)

 

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

TEMPORARY

VARCHAR2(1)

 

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

GENERATED

VARCHAR2(1)

 

Indicates whether the name of the index is system-generated (Y) or not (N)

SECONDARY

VARCHAR2(1)

 

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

BUFFER_POOL

VARCHAR2(7)

 

Buffer pool to be used for index blocks:

  • DEFAULT

  • KEEP

  • RECYCLE

  • NULL

FLASH_CACHE

VARCHAR2(7)

 

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

  • DEFAULT

  • KEEP

  • NONE

Solaris and Oracle Linux functionality only.

CELL_FLASH_CACHE

VARCHAR2(7)

 

Cell flash cache hint to be used for index blocks:

  • DEFAULT

  • KEEP

  • NONE

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

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

PCT_DIRECT_ACCESS

NUMBER

 

For a secondary index on an index-organized table, the percentage of rows with VALID guess

ITYP_OWNER

VARCHAR2(128)

 

For a domain index, the owner of the indextype

ITYP_NAME

VARCHAR2(128)

 

For a domain index, the name of the indextype

PARAMETERS

VARCHAR2(1000)

 

For a domain index, the parameter string

GLOBAL_STATS

VARCHAR2(3)

 

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

DOMIDX_STATUS

VARCHAR2(12)

 

Status of a domain index:

  • NULL - Index is not a domain index

  • VALID - Index is a valid domain index

  • IDXTYP_INVLD - Indextype of the domain index is invalid

DOMIDX_OPSTATUS

VARCHAR2(6)

 

Status of the operation on a domain index:

  • NULL - Index is not a domain index

  • VALID - Operation performed without errors

  • FAILED - Operation failed with an error

FUNCIDX_STATUS

VARCHAR2(8)

 

Status of a function-based index:

  • NULL - Index is not a function-based index

  • ENABLED - Function-based index is enabled

  • DISABLED - Function-based index is disabled

JOIN_INDEX

VARCHAR2(3)

 

Indicates whether the index is a join index (YES) or not (NO)

IOT_REDUNDANT_PKEY_ELIM

VARCHAR2(3)

 

Indicates whether redundant primary key columns are eliminated from secondary indexes on index-organized tables (YES) or not (NO)

DROPPED

VARCHAR2(3)

 

Indicates whether the index 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 indexes that have been dropped.

VISIBILITY

VARCHAR2(9)

 

Indicates whether the index is VISIBLE or INVISIBLE to the optimizer

DOMIDX_MANAGEMENT

VARCHAR2(14)

 

If this is a domain index, indicates whether the domain index is system-managed (SYSTEM_MANAGED) or user-managed (USER_MANAGED)

SEGMENT_CREATED

VARCHAR2(3)

 

Indicates whether the index segment has been created (YES) or not (NO)

ORPHANED_ENTRIES

VARCHAR2(3)

 

Indicates whether a global index contains stale entries because of deferred index maintenance during DROP/TRUNCATE PARTITION, or MODIFY PARTITION INDEXING OFF operations.

Possible values:

  • YES - The index contains orphaned entries

  • NO - The index does not contain orphaned entries

INDEXING

VARCHAR2(7)

 

Indicates whether a global index is decoupled from the underlying table.

Possible values:

  • PARTIAL - The index is partial, that is, it will follow the table's indexing property.

  • FULL - The index will include all partitions of the table.

See Also: