Managing Connections using Parameter Files

Try this tip for managing PowerCenter connections.

Parametrize connections and use one parameter file to define them. Use the one parameter file in all your workflows. This will bring consistency to development and make it easy when connection changes are required.

Parameter files are also useful for defining “logic” related parameters or variables but define those in a separate parameter file(s). You can use separate “logic” parameter files to best fit your need, for example creating one per project, one per PowerCenter folder, etc.

In order to use two parameter files in a workflow, I recommend this technique, add the $PMMergeSessParamFile=TRUE property to the connections parameter file and define the parameter file at the workflow level (Workflow > Edit). Define “logic” parameter files at the session level.

The property $PMMergeSessParamFile=TRUE will enable the workflow to use multiple parameter files.

The connections parameter file should look something like this:



The logic parameter file should look something like this



When the workflow executes, it will pull connections from the "connection" parameter file and logic parameters from any parameter files defined at the session level.

Technical information for this article was taken from the Informatica KB article "Reading Session and Workflow Parameter Files Simultaneously"

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IMPORTANT,  YOU are responsible for backing up your systems before trying or implementing any suggestions from this blog. I do not guarantee 100% accuracy of any code examples. I do not presume to know your system environment(s) or Security requirements; all code examples from this blog should be thoroughly tested before any attempted use on a production system.

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