Figure 22.   Rollup node

You can use the Rollup Editor to create the output schema of the graph node. You create the schema by adding field names to the schema and assigning functions to each field.

Figure 23.   Rollup Editor

When you click the Add button (), an empty text field and drop-down list open in the editor. To complete the addition of a field, first type a unique name in the text field for the schema field and then select an input field from the drop down-list. Each field in list is a field from one of the incoming schemata.

The Rollup Editor includes an Auto button () in the top right corner of the editor. Clicking this button populates the rollup schema with fields from each incoming schemata, automatically supplying unique field names.

Each function takes a set of input source schema fields as parameter values. You use the Function Editor to select parameters to apply. There is no limit to the number of parameters you may select for a function, with the exception of the Pass Through function, which passes through a single value without altering it. This makes the value available for the next consuming node in the graph.

The Rollup interval is an absolute time-based interval that assumes the key field of the incoming data schema. You can use the Rollup Interval option list to select a rollup interval. The interval selector provides several predefined settings and also provides a custom setting the includes a custom time editor.

Figure 24.   Rollup Interval selector