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Table of Contents

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  1. Preface
  2. Transformations
  3. Source transformation
  4. Target transformation
  5. Aggregator transformation
  6. Expression transformation
  7. Filter transformation
  8. Input transformation
  9. Joiner transformation
  10. Lookup transformation
  11. Mapplet transformation
  12. Normalizer transformation
  13. Output transformation
  14. Rank transformation
  15. Router transformation
  16. Sequence transformation
  17. Sorter transformation
  18. SQL transformation
  19. Union transformation

Transformations

Transformations

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Lookup SQL overrides

Lookup SQL overrides

When a mapping includes a Lookup transformation, the
mapping
 task queries the lookup object based on the fields and properties that you configure in the Lookup transformation. The
mapping
 task runs a default lookup query when the first row of data enters the Lookup transformation. If the Lookup transformation performs a relational lookup, you can override the default query.
You can override the default query for both cached and uncached lookups. To view the default query, run the
mapping
 task. The default query appears in the log file.
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