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The Rank transformation includes input, input/output, or output ports that are connected to another transformation in the mapping. The transformation also includes pass-through, and variable ports.
A Rank transformation has the following port types:
Input
Receives data from upstream transformations. You can designate input ports as input/output ports. The transformation must have at least one input port.
Dynamic Port
A port that can receive multiple columns to create a dynamic number of generated ports. A generated port is a port within a dynamic port that represents a single column. You can create input, output, and variable dynamic ports.
Output
Passes data to downstream transformations. You can designate output ports as input/output ports. The transformation must have at least one output port.
Pass-Through
Passes data unchanged.
Variable
Used for local variables. You can use a variable port to store values or calculations to use in an expression. Variable ports cannot be input or output ports. They pass data within the transformation.