Oracle Spatial User's Guide and Reference - InfoLab

Spatial Index-Related Structures
Table 2–4 Columns in the xxx_SDO_INDEX_METADATA Views
Column Name Data Type Purpose
SDO_INDEX_OWNER VARCHAR2 Owner of the index.
SDO_INDEX_TYPE VARCHAR2 Contains QTREE (for a quadtree index) or
RTREE (for an R-tree index).
SDO_INDEX_NAME VARCHAR2 Name of the index.
SDO_INDEX_TABLE VARCHAR2 Name of the spatial index table (described in
Section 2.5.2).
SDO_INDEX_PRIMARY NUMBER Indicates if this is a primary or secondary index.
1 = primary, 2 = secondary.
SDO_INDEX_PARTITION VARCHAR2 For a partitioned index, name of the index
partition.
SDO_PARTITIONED NUMBER Contains 0 if the index is not partitioned or 1 if
the index is partitioned.
SDO_TSNAME VARCHAR2 Schema name of the SDO_INDEX_TABLE.
SDO_COLUMN_NAME VARCHAR2 Name of the column on which this index is
built.
SDO_INDEX_DIMS NUMBER Number of dimensions of the geometry objects
in the column on which this index is built.
SDO_RTREE_HEIGHT NUMBER Height of the R-tree.
SDO_RTREE_NUM_
NODES
NUMBER Number of nodes in the R-tree.
SDO_RTREE_
DIMENSIONALITY
NUMBER Number of dimensions indexed.
SDO_RTREE_FANOUT NUMBER Maximum number of children in each R-tree
node.
SDO_RTREE_ROOT VARCHAR2 Rowid corresponding to the root node of the
R-tree in the index table.
SDO_RTREE_SEQ_NAME VARCHAR2 Sequence name associated with the R-tree.
SDO_RTREE_PCTFREE NUMBER Minimum percentage of slots in each index tree
node to be left empty when an R-tree index is
created.
2-30 Oracle Spatial User’s Guide and Reference