Source Qualifier is Active Transformation Source Qualifier is connected transformation. It should be there in pipeline. This is default transformation which comes along with source instance when you drag and drop into mapping area.But there is some exceptional case with XML and COBOL sources. This is mandatory transformation to read data from sources and it converts the source data types to the informatica native data types. So, you should not alter the data types of the ports in the source qualifier transformation. If we are not using Push Down Optimization, then every port of source qualifier should have link from source instance. Otherwise, workflow will fail. If we are using Push Down Optimization, then at-least one port of source qualifier should have link from source instance. Otherwise, workflow will fail. Source Qualifier Properties: Below are the Source qualifier properties and there are enable when we are using tables as sources. In case of files as source, these