Configure partitioning by specifying one or more columns under partition keys on the

Windowing

tab.

The following image shows the Windowing tab:

Optionally, configure the partition keys to separate the input rows into different partitions. Configure the partition keys to define partition boundaries, rather than performing the calculation across all inputs. If you do not define partition keys, all the data is included in the same partition. The variable values stored will be global and every row can read and update the same set of variables.

You can specify the partition keys by value or parameter. Select

Value

to use port names.

The following table lists the data type support for variable ports:

Data Type	Initial State Value
String	EMPTY_STRING
Integer	0
Double	0.0
Long	0
Text	EMPTY_STRING
Decimal	0.0