## INDEXSTORAGEDETAILS

### Definition

The system table INDEXSTORAGEDETAILS contains information about the structure and size of indexes.

### Structure

INDEXSTORAGEDETAILS

SCHEMANAME | CHAR(32) | Name of the schema
TABLENAME | CHAR(32) | Name of the table
INDEXNAME | CHAR(32) | Name of the index
TREELEVELCOUNT | FIXED(3) | Number of B* tree index levels
AVGSEPARATORLENGTH | FIXED(4) | Average separator length
MINSEPARATORLENGTH | FIXED(4) | Minimum separator length
MAXSEPARATORLENGTH | FIXED(4) | Maximum separator length
AVGUSEDSIZEPERCENTAGEINLEAVES | FIXED(3) | Average fill level of the pages that contain data
MINUSEDSIZEPERCENTAGEINLEAVES | FIXED(3) | Minimum fill level of a page that contains data
MAXUSEDSIZEPERCENTAGEINLEAVES | FIXED(3) | Maximum fill level of a page that contains data
AVGSECONDARYKEYLENGTH | FIXED(4) | Average length of the secondary key values
MINSECONDARYKEYLENGTH | FIXED(4) | Minimum length of a secondary key value
MAXSECONDARYKEYLENGTH | FIXED(4) | Maximum length of a secondary key value
AVGROWCOUNTPERSECONDARYKEY | FIXED(10) | Average number of table rows per secondary key
MINROWCOUNTPERSECONDARYKEY | FIXED(10) | Minimum number of table rows per secondary key
MAXROWCOUNTPERSECONDARYKEY | FIXED(10) | Maximum number of table rows per secondary key
CLUSTERCOUNT | FIXED(10) | Number of pages stored in clusters

See also:

FILES

Concepts of the Database System, Logical Access Structures