| Column ID | Column name | Data type | Length | Precision | NULL | Description |
|
| 1 | OWNER | VARCHAR2 | 30 | (null) | N | Owner of the cluster |
| 2 | CLUSTER_NAME | VARCHAR2 | 30 | (null) | N | Name of the cluster |
| 3 | TABLESPACE_NAME | VARCHAR2 | 30 | (null) | N | Name of the tablespace containing the cluster |
| 4 | PCT_FREE | NUMBER | 22 | (null) | Y | Minimum percentage of free space in a block |
| 5 | PCT_USED | NUMBER | 22 | (null) | Y | Minimum percentage of used space in a block |
| 6 | KEY_SIZE | NUMBER | 22 | (null) | Y | Estimated size of cluster key plus associated rows |
| 7 | INI_TRANS | NUMBER | 22 | (null) | N | Initial number of transactions |
| 8 | MAX_TRANS | NUMBER | 22 | (null) | N | Maximum number of transactions |
| 9 | INITIAL_EXTENT | NUMBER | 22 | (null) | Y | Size of the initial extent in bytes |
| 10 | NEXT_EXTENT | NUMBER | 22 | (null) | Y | Size of secondary extents in bytes |
| 11 | MIN_EXTENTS | NUMBER | 22 | (null) | N | Minimum number of extents allowed in the segment |
| 12 | MAX_EXTENTS | NUMBER | 22 | (null) | N | Maximum number of extents allowed in the segment |
| 13 | PCT_INCREASE | NUMBER | 22 | (null) | Y | Percentage increase in extent size |
| 14 | FREELISTS | NUMBER | 22 | (null) | Y | Number of process freelists allocated in this segment |
| 15 | FREELIST_GROUPS | NUMBER | 22 | (null) | Y | Number of freelist groups allocated in this segment |
| 16 | AVG_BLOCKS_PER_KEY | NUMBER | 22 | (null) | Y | Average number of blocks containing rows with a given cluster key |
| 17 | CLUSTER_TYPE | VARCHAR2 | 5 | (null) | Y | Type of cluster: b-tree index or hash |
| 18 | FUNCTION | VARCHAR2 | 15 | (null) | Y | If a hash cluster, the hash function |
| 19 | HASHKEYS | NUMBER | 22 | (null) | Y | If a hash cluster, the number of hash keys (hash buckets) |
| 20 | DEGREE | VARCHAR2 | 10 | (null) | Y | The number of threads per instance for scanning the cluster |
| 21 | INSTANCES | VARCHAR2 | 10 | (null) | Y | The number of instances across which the cluster is to be scanned |
| 22 | CACHE | VARCHAR2 | 5 | (null) | Y | Whether the cluster is to be cached in the buffer cache |
| 23 | BUFFER_POOL | VARCHAR2 | 7 | (null) | Y | The default buffer pool to be used for cluster blocks |
| 24 | SINGLE_TABLE | VARCHAR2 | 5 | (null) | Y | Whether the cluster can contain only a single table |
| 25 | DEPENDENCIES | VARCHAR2 | 8 | (null) | Y | Should we keep track of row level dependencies? |