Modifying the metadata of streams

In the previous sections, you learned several ways to transform data using different PDI steps. There is a particular step already familiar to you, which is available across all the functionalities—the Select values step. Despite being classed as a Transform step, the Select values step does more than just transform data. It allows you to select, reorder, rename, and delete fields, or change the metadata of a field. The configuration window of the step has three tabs:

  • Select & Alter
  • Remove
  • Meta-data
You may use only one of the Select values step tabs at a time. PDI will not restrain you from filling out more than one tab, but that could lead to unexpected behavior.

The Select & Alter tab, which appears ...

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