Table Editor

Name

Column Name (column_name)

Data Type

Data Type (data_type)

Dim

Dimension

Maximum number of characters

Code

Code attribute

Key

If you select this option, you add this column to the primary key.

Key Definition (key_definition)

All columns in the primary key must be NOT NULL columns.

You cannot use any columns of the LOB data type in the primary key.

The database ensures that no NULL value exists in the key column and that no two data records in the table have the same values in all key columns.

Not Null

If you select this option, the value for this column cannot be a NULL value.

Column Attributes (column_attributes)

Default

Default value

Name

Constraint Name (constraint_name)

Definition

CONSTRAINT Definition (constraint_definition)

Name

Index Name (index_name)

Unique

Specifies whether the values for this columns must be unique

UNIQUE Definition (unique_definition)

Disabled

Specifies whether the index is enabled or disabled

Indexed Columns

Columns that are indexed

Usage Count

Shows how often the system has used the index

Bad

Shows whether the index is damaged

Name

Foreign key name

Referencing Columns

Referencing column

Referential CONSTRAINT Definition (referential_constraint_definition)

Reference Schema

Schema to which the table with the column that is referenced belongs

Reference Table

Table to which the column that is referenced belongs

Reference Column

Column which is referenced

Rule

Rule for behavior of the table referenced if a data record is deleted in the referencing table

DELETE Rule (delete_rule)

Sample Type

Sample type that the system uses for estimating the statistics for the SQL Optimizer

More information:

• Updating SQL Optimizer Statistics

• SQL Reference Manual, SAMPLE Definition (sample_definition)

Sample Data

Sample value (in data records or percent) that the system uses for estimating the statistics for the SQL Optimizer

-

Information about the current sizes (table, LOBs, and so on) and when the table was created/last changed.

Clustered

Only for SAP NetWeaver BI systems with BW Feature Pack

This attribute has the result that the database does not distribute pages in single blocks of 8 KB across all volumes, rather, where possible it saves the contents in larger, contiguous blocks in the data volumes.

More information:

• SAP Note 1040431

• SAP MaxDB Wiki: https://wiki.sdn.sap.com/wiki/x/W0o

Virtual Primary Key

Only for SAP NetWeaver BI systems with BW Feature Pack

For tables which have no primary key, the system forms a primary key internally and sets the Clustered attribute. Columns which the system uses for the primary key do not need to have the UNIQUE attribute.

Packed

Only for SAP NetWeaver BI systems with BW Feature Pack

The system stores numerical columns that are not key columns in compressed form.

Caching Mode

Specifies how long data from this table is kept in the data cache, see Caching Mode.

Columns and Indexes

Columns and indexes

Different Values

Estimated number of rows in the table

If there is a big difference between the value in this column and the value in the Different Values (Exact) column, we recommend that you update the SQL optimizer statistics. For more information, see SQL Optimizer, SQL Optimizer Statistics.

Different Values (Exact)

Number of rows in the table (information from the internal file directory)

Pages

Estimated table size in pages

This size affects which search strategy is selected by the system, see SQL Optimizer, Search Strategies.

If there is a big difference between the value in this column and the value in the Pages (Exact) column, we recommend that you update the SQL optimizer statistics.

Pages (Exact)

Table size in pages (information from the internal file directory)

Last Statistics Update

Time of the last statistics update