The group_union node
This node is used to terminate and 'un-group' a grouped dataflow. It must be placed
after a group_by node.
The group_union node acts as a union for grouped dataflows.
If this node is used without a
group_by node, it will have no effect at all on the data-flow.
Note: The behaviour of using more than 1
group_unionnode within a flow is not defined.
|group_by('fieldname1') %% 1 debug-node per group |debug() |group_union() %% end of grouping |debug()
An instance of the first debug node wil be started for every group, the second one will exist only once.