Use a command to generate the input rows for flat file source data. Use a command to generate or transform flat file data and send the standard output of the command to the flat file reader when the session runs. The flat file reader reads the standard output of the command as the flat file source data. Generating source data with a command eliminates the need to stage a flat file source. Use a command or script to send source data directly to the Integration Service instead of using a pre-session command to generate a flat file source.

For example, to uncompress a data file and use the uncompressed data as the source data input rows, use the following command:

The command uncompresses the file and sends the standard output of the command to the flat file reader. The flat file reader reads the standard output of the command as the flat file source data.