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Oracle® Database Reference
11g Release 1 (11.1)

B28320-03
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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 SQL ANALYZE statement.

Related Views

Note:

Column names followed by an asterisk are populated only if you collect statistics on the index using the ANALYZE statement or the DBMS_STATS package.
Column Datatype NULL Description
OWNER VARCHAR2(30) NOT NULL Owner of the index
INDEX_NAME VARCHAR2(30) NOT NULL Name of the index
INDEX_TYPE VARCHAR2(27)   Type of the index:
  • NORMAL

  • NORMAL/REV

  • BITMAP

  • FUNCTION-BASED NORMAL

  • FUNCTION-BASED NORMAL/REV

  • FUNCTION-BASED BITMAP

  • CLUSTER

  • IOT - TOP

  • DOMAIN

TABLE_OWNER VARCHAR2(30) NOT NULL Owner of the indexed object
TABLE_NAME VARCHAR2(30) NOT NULL Name of the indexed object
TABLE_TYPE CHAR(5)   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(8)   Indicates whether index compression is enabled (ENABLED) or not (DISABLED)
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 and is not used.

STATUS VARCHAR2(8)   Indicates whether a nonpartitioned index is VALID or UNUSABLE
NUM_ROWS NUMBER   Number of rows in the index
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)   Default buffer pool to be used for the index blocks:
  • DEFAULT

  • KEEP

  • RECYCLE

  • NULL

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

NNUL - 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(30)   For a domain index, the owner of the indextype
ITYP_NAME VARCHAR2(30)   For a domain index, the name of the indextype
PARAMETERS VARCHAR2(1000)   For a domain index, the parameter string
GLOBAL_STATS VARCHAR2(3)   For partitioned indexes, indicates whether statistics were collected by analyzing the index as a whole (YES) or were estimated from statistics on underlying index partitions and subpartitions (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
VISIBILITY VARCHAR2(10)   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)