Union

Description

Union merges multiple branches into one branch.

In the Streaming processing mode events from the incoming branches are passed to the output branch without an attempt to combine or match them.

Union is not available in the Request-Response processing mode; use the Collect node there — it merges branches and collects their results into a list in one step.

The #input variable will be no longer available downstream the union node; a new variable will be available instead, its name is configured in the union node.

Branch names visible in the node configuration form are derived from node names preceding the union node.

Parameters and configuration

Name	Description
Output variable name	This variable will hold result of the Union node
Output Expression	When event arrives from a particular input branch, the output expression defined for this branch is evaluated and passed to the output branch. The expressions defined for all incoming branches need to be of identical data type. Note, that the #input variable used in the Output expression field refers to the content of the respective incoming branch.