ALL_IND_SUBPARTITIONS

ALL_IND_SUBPARTITIONS describes, for each index subpartition accessible to the current user, the partition-level partitioning information, the storage parameters for the subpartition, and various partition statistics collected by ANALYZE statements.

Related Views

  • DBA_IND_SUBPARTITIONS describes all index subpartitions in the database.

  • USER_IND_SUBPARTITIONS describes the index subpartitions owned by the current user. This view does not display the INDEX_OWNER column.

Column Datatype NULL Description
INDEX_OWNER VARCHAR2(30) NOT NULL Owner of the index
INDEX_NAME VARCHAR2(30) NOT NULL Name of the index
PARTITION_NAME VARCHAR2(30)   Name of the partition
SUBPARTITION_NAME VARCHAR2(30)   Name of the subpartition
HIGH_VALUE LONG   Subpartition bound value expression
HIGH_VALUE_LENGTH NUMBER NOT NULL Length of the subpartition bound value expression
SUBPARTITION_POSITION NUMBER   Position of a subpartition within a partition
STATUS VARCHAR2(8)   Indicates whether the index partition is usable (USABLE) or not (UNUSABLE)
TABLESPACE_NAME VARCHAR2(30) NOT NULL Name of the tablespace containing the partition
PCT_FREE NUMBER NOT NULL Minimum percentage of free space in a block
INI_TRANS NUMBER NOT NULL Initial number of transactions
MAX_TRANS NUMBER NOT NULL Maximum number of transactions
INITIAL_EXTENT NUMBER   Size of the initial extent in bytes
NEXT_EXTENT NUMBER   Size of secondary extents in bytes
MIN_EXTENT NUMBER NOT NULL Minimum number of extents allowed in the segment
MAX_EXTENT NUMBER NOT NULL Maximum number of extents allowed in the segment
MAX_SIZE NUMBER   Maximum number of blocks allowed in the segment
PCT_INCREASE NUMBER NOT NULL Percentage increase in extent size
FREELISTS NUMBER   Number of process freelists allocated in this segment
FREELIST_GROUPS NUMBER   Number of process freelist groups allocated in this segment
LOGGING VARCHAR2(3)   Indicates whether or not changes to the index are logged:
  • YES

  • NO

COMPRESSION VARCHAR2(8)   Indicates whether this subpartition is compressed (ENABLED) or not (DISABLED)
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 keys in the index partition
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.

NUM_ROWS NUMBER   Number of rows in this index subpartition
SAMPLE_SIZE NUMBER   Sample size used in analyzing this subpartition
LAST_ANALYZED DATE   Date on which this partition was most recently analyzed
BUFFER_POOL VARCHAR2(7)   Default buffer pool for the subpartition:
  • DEFAULT

  • KEEP

  • RECYCLE

  • NULL

USER_STATS VARCHAR2(3)   Indicates whether statistics were entered directly by the user (YES) or not (NO)
GLOBAL_STATS VARCHAR2(3)   Indicates whether column statistics for the subpartition statistics were collected by analyzing the table as a whole (YES) or estimated from statistics gathered on partitions and subpartitions (NO)