Big Data Management User Guide

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Rules and Guidelines for Complex Ports

Consider the following rules and guidelines when you work with complex ports:

Aggregator transformation. You cannot define a group by value as a complex port.

Filter transformation. You cannot use the operators >, < , >=, and <= in a filter condition to compare data in complex ports.

Joiner transformation. You cannot use the operators >, < , >=, and <= in a join condition to compare data in complex ports.

Lookup transformation. You cannot use a complex port in a lookup condition.

Rank transformation. You cannot define a group by or rank value as a complex port.

Router transformation. You cannot use the operators >, < , >=, and <= in a group filter condition to compare data in complex ports.

Sorter transformation. You cannot define a sort key value as a complex port.

You can use complex operators to specify an element of a complex port that is of a primitive data type.

For example, an array port "emp_names" contains string elements. You can define a group by value as emp_names[0], which is of type string.