Expand stage in DataStage

The Expand stage converts a previously compressed data set back into a sequence of records from a stream of raw binary data.

The Expand stage can have a single input link and a single output link.

The Expand stage is a processing stage that uses the UNIX uncompress or GZIP utility to expand a data set. It converts a previously compressed data set back into a sequence of records from a stream of raw binary data. The complement to the Expand stage is the Compress stage which is described in Compress stage in DataStage.

When you double-click the Compress stage, the properties panel opens. The properties panel has three tabs:

• Stage. This is always present and is used to specify general information about the stage.
• Input. This is where you specify details about the data set being expanded.
• Output. This is where you specify details about the expanded data being output from the stage.

Input tab

The Columns section specifies the column definitions of incoming data. The Advanced section allows you to change the default buffering settings for the input link.

Output tab

The Expand stage only has one output link.

The Columns section specifies the column definitions of incoming data. Click Edit at the bottom of the Columns section to specify the column definitions of the data. The Advanced section allows you to change the default buffering settings for the output link.