TABLESTATISTICS 
Definition
The statistics system table TABLESTATISTICS contains information about the structure and sizes of base tables.
Structure
TABLESTATISTICS
SCHEMANAME |
CHAR(32) |
Name of the schema of the table |
OWNER |
CHAR(32) |
Name of the owner of the table |
TABLENAME |
CHAR(32) |
Table name |
DESCRIPTION |
CHAR(40) |
Description of how to interpret the following columns (see DESCRIPTION Column table) |
CHAR_VALUE |
CHAR(12) |
Alphanumeric value |
NUMERIC_VALUE |
FIXED(10) |
Numeric value |
DESCRIPTION Column
Value |
Explanation |
Root pno |
NUMERIC_VALUE contains the page number of the B* tree root |
File type |
CHAR_VALUE contains the B* tree type |
Used pages |
NUMERIC_VALUE contains the number of pages used by the table |
Index pages |
NUMERIC_VALUE contains the number of pages used by the table in the B* tree index |
Leaf pages |
NUMERIC_VALUE contains the number of leaf pages used by the table |
Index levels |
NUMERIC_VALUE contains the number of B* tree index levels |
Space used in all pages(%) |
NUMERIC_VALUE contains the percentage of the B* tree root pages used |
Space used in root page(%) |
NUMERIC_VALUE contains the percentage of the B* tree root pages used |
Space used in index pages(%) |
NUMERIC_VALUE contains the percentage of the B* tree index pages used |
Space used in index pages(%) min |
NUMERIC_VALUE contains the minimum percentage of the B* tree index pages used |
Space used in index pages(%) max |
NUMERIC_VALUE contains the maximum percentage of the B* tree index pages used |
Space used in leaf pages(%) |
NUMERIC_VALUE contains the percentage of the B* tree leaf pages used |
Space used in leaf pages(%) min |
NUMERIC_VALUE contains the minimum percentage of the B* tree leaf pages used |
Space used in leaf pages(%) max |
NUMERIC_VALUE contains the maximum percentage of the B* tree leaf pages used |
Rows |
NUMERIC_VALUE contains the number of table rows |
Avg rows per page |
NUMERIC_VALUE contains the average number of rows per page |
Min rows per page |
NUMERIC_VALUE contains the minimum number of rows per page |
Max rows per page |
NUMERIC_VALUE contains the maximum number of rows per page |
Avg row length |
NUMERIC_VALUE contains the average length of rows |
Min row length |
NUMERIC_VALUE contains the minimum length of rows |
Max row length |
NUMERIC_VALUE contains the maximum length of rows |
Avg key length |
NUMERIC_VALUE contains the average length of keys |
Min key length |
NUMERIC_VALUE contains the minimum length of keys |
Max key length |
NUMERIC_VALUE contains the maximum length of keys |
Avg separator length |
NUMERIC_VALUE contains the average length of the separator |
Min separator length |
NUMERIC_VALUE contains the minimum length of the separator |
Max separator length |
NUMERIC_VALUE contains the maximum length of the separator |
Defined LONG columns |
NUMERIC_VALUE contains the number of defined columns with the data type LONG |
Avg LONG column length |
NUMERIC_VALUE contains the average length of LONG columns |
Min LONG column length |
NUMERIC_VALUE contains the minimum length of LONG columns |
Max LONG column length |
NUMERIC_VALUE contains the maximum length of LONG columns |
LONG column pages |
NUMERIC_VALUE contains the number of pages of all the LONG columns in the table |
Avg pages per LONG column |
NUMERIC_VALUE contains the average number of pages in the table per LONG column |
Min pages per LONG column |
NUMERIC_VALUE contains the smallest LONG column in the table in pages |
Max pages per LONG column |
NUMERIC_VALUE contains the largest LONG column in the table in pages |
See also:
Concepts of the Database System, Logical Access Structures