|Oracle® OLAP DML Reference
10g Release 1 (10.1)
Part Number B10339-02
NONE(boolean-expression [[STATUS] dimensions])
The Boolean expression to be evaluated.
Can be specified when one or more of the dimensions of the result of the function are not dimensions of the Boolean expression. (See the description of the dimensions argument.) When you specify the STATUS keyword when this is not the case, Oracle OLAP produces an error.
In cases where one or more of the dimensions of the result of the function are not dimensions of the Boolean expression, the STATUS keyword might be required in order for Oracle OLAP to process the function successfully, or the STATUS keyword might provide a performance enhancement. See "The STATUS Keyword".
The dimensions of the result. By default, NONE returns a single value. When you indicate one or more dimensions for the result, NONE tests for
TRUE values along the dimensions that are specified and returns an array of values. Each dimension must be either a dimension of boolean-expression or related to one of its dimensions. When it is a related dimension, you can specify the name of the relation instead of the dimension name. This enables you to choose which relation is used when there is more than one.
When the Boolean expression involves an
NA value, NONE returns a
NO result when it can, as shown in the following table.
However, in cases where a
NO result would be misleading, NONE returns
NA. For example, when you test whether an
NA value is greater than a non-
NA value, NONE returns
NONE is affected by the NASKIP option. When NASKIP is set to
YES (the default), NONE ignores
NA values and returns
YES when no value of the Boolean expression is
TRUE and returns
NO when any values are
TRUE. When NASKIP is set to
NO, NONE returns
NA when any value of the expression is
NA. When all the values of the expression are
NA, NONE returns
NA for either setting of NASKIP.
When boolean-expression is dimensioned by a dimension of type DAY, WEEK, MONTH, QUARTER, or YEAR, you can specify any other DAY, WEEK, MONTH, QUARTER, or YEAR dimension as a related dimension. Oracle OLAP uses the implicit relation between the dimensions. To control the mapping of one DAY, WEEK, MONTH, QUARTER, or YEAR dimension to another (for example, from weeks to months), you can define an explicit relation between the two dimensions and specify the name of the relation as the dimension argument to the NONE function.
For each time period in the related dimension, Oracle OLAP tests the data values for all the source time periods that end in the target time period. This method is used regardless of which dimension has the more aggregate time periods.
When one or more of the dimensions of the result of the function are not dimensions of the Boolean expression, Oracle OLAP creates a temporary variable to use while processing the function. When you specify the STATUS keyword, Oracle OLAP uses the current status instead of the default status of the related dimensions for calculating the size of this temporary variable.
When the size of the temporary variable for the results of the function would exceed 2 gigabytes, you must specify the STATUS keyword in order for Oracle OLAP to execute the function successfully. When the dimensions of the Boolean expression are limited to a few values and are physically fragmented, you can specify the STATUS keyword to improve the performance of the function.
When you use NONE with the STATUS keyword in an expression that requires going outside of the status for results (for example, with the LEAD or LAG functions or with a qualified data reference), the results outside of the status will be returned as
Example 18-34 Testing for No True Values by District
Suppose you want to find out which districts had no months in which sales fell below $50,000. Use the NONE function to determine whether the Boolean expression (
TRUE for no months. To have the results dimensioned by district, specify
district as the second argument to NONE.
LIMIT product TO 'Sportswear' REPORT NONE(sales LT 50000, district)
The preceding statements produce the following output.
NONE(SALES LT 50000, DISTRICT DISTRICT) -------------- ---------- Boston NO Atlanta YES Chicago YES Dallas YES Denver YES Seattle NO
Example 18-35 Testing for No True Values by Region
You might also want to find out which regions had no months in which no districts had sportswear sales of less than $50,000. Since the
region dimension is related to the
district dimension, you can specify
region instead of
district as a dimension for the results of ANY.
REPORT NONE(sales LT 50000, region)
The preceding statement produces the following output.
NONE(SALES LT 50000, REGION REGION) -------------- ---------- East NO Central YES West NO