Providing software solutions since 1976

• Log in
• Create profile
• Welcome
  [Log out]
• Edit profile

• Print  |
• Feedback  |
• Share

  • E-mail

  
  
  

  E-mail This Page

  Your Name:*
  Your E-mail:*
  Recipient E-mail:*
  Send a copy to me
  Personal Message:
  
  

  * indicates a required field

In SAS 9.1.3, the COMPACT_NWAY option has been added to the PROC OLAP
statement. If specified, it will enable the OLAP procedure to perform an
additional summarization step that will decrease the size of the NWAY
aggregation and improve viewing performance. The amount of improvement
depends on the nature of the source data.

Candidates for compaction are cubes that are built from a star schema,
where levels are not defined for all columns in all dimension tables.
For example, assume that a cube is built from a star schema that
contains a Time dimension table. The Time table contains columns for
year, quarter, month, and day, along with a primary key column. If the
cube is defined such that the day column is not specified as a level of
a time hierarchy, then there are up to 31 key values that refer to each
unique combination of year, quarter and month. Together, these key
values define a unique leaf member of that hierarchy. These are the
values that may be summarized at build time. The cubes that are the
candidates for compaction are those with source data that contains
multiple keys for a single leaf member of a hierarchy.

The amount of compaction in the NWAY aggregation is determined by the
number of source rows that can be summarized. The number of summarized
rows depends on the number of unique key values in the fact table that
refer to the same leaf member of a hierarchy. Another compaction factor
is the number of rows in the fact table that contain unique combinations
of keys; these rows are not compacted.

In SAS 9.1.3 Service Pack 2, the ability to specify the COMPACT_NWAY
option is now surfaced within the OLAP Cube Studio interface under the
"Advanced" dialog within the "General" panel of the Cube Designer.

A fix for SAS 9.1.3 (9.1 TS1M3) for this issue is available at:

http://www.sas.com/techsup/download/hotfix/e9_sbcs_prod_list.html#014296

For customers running SAS with Asian Language Support (DBCS), this
fix should be downloaded from:

http://www.sas.com/techsup/download/hotfix/e9_dbcs_prod_list.html#014296

Operating System and Release Information

A fix for SAS 9.1.3 (9.1 TS1M3) for this issue is available at:

A fix for SAS 9.1.3 (9.1 TS1M3) with Asian Language Support (DBCS) for this issue is available at :