Loop End (2 ports)

Node at the end of a loop. It is used to mark the end of a workflow loop and collects the intermediate results by row-wise concatenation of the incoming tables. The start of the loop is defined by the loop start node, in which you can define how often the loop should be executed (either fixed or derived from data, e.g. the "group loop start"). All nodes in between are executed that many times.

Dialog Options

Add iteration column
Allows you to add a column containing the iteration number to the output table.
Uniquify row IDs
If set, the iteration number is added to each row ID from the incoming table, thus making the row IDs unique over all iterations. If unset, the incoming row keys are not altered. In this case you have to make sure that there are not duplicate row IDs in different iterations. Otherwise an error occurs.
Ignore empty input tables
If this option is checked empty input tables and there structure are ignored and will not cause the node to fail.
Allow variable column types
If checked, the loop does not fail when the column types between different table iterations change.

Ports

Input Ports
0 Any datatable
1 Any datatable
Output Ports
0 Collected results from the loop body; datatable 0
1 Collected results from the loop body; datatable 1
This node is contained in KNIME Base Nodes provided by KNIME GmbH, Konstanz, Germany.