Table of Contents

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  1. Preface
  2. Transformations
  3. Source transformation
  4. Target transformation
  5. Access Policy transformation
  6. Aggregator transformation
  7. Cleanse transformation
  8. Data Masking transformation
  9. Data Services transformation
  10. Deduplicate transformation
  11. Expression transformation
  12. Filter transformation
  13. Hierarchy Builder transformation
  14. Hierarchy Parser transformation
  15. Hierarchy Processor transformation
  16. Input transformation
  17. Java transformation
  18. Java transformation API reference
  19. Joiner transformation
  20. Labeler transformation
  21. Lookup transformation
  22. Machine Learning transformation
  23. Mapplet transformation
  24. Normalizer transformation
  25. Output transformation
  26. Parse transformation
  27. Python transformation
  28. Rank transformation
  29. Router transformation
  30. Rule Specification transformation
  31. Sequence Generator transformation
  32. Sorter transformation
  33. SQL transformation
  34. Structure Parser transformation
  35. Transaction Control transformation
  36. Union transformation
  37. Velocity transformation
  38. Verifier transformation
  39. Web Services transformation

Transformations

Transformations

Multiple match policy restrictions

Multiple match policy restrictions

When you configure a lookup, you define the behavior when a lookup condition returns more than one match. Some types of lookups have restrictions on the multiple match policy.
The following types of lookups have multiple match policy restrictions:
Uncached lookups
Some connector types do not support the multiple match policies
Return first row
and
Return last row
in uncached lookups. If you select either of these policies, and the connector does not support the policy in uncached lookups,
Data Integration
enables the
Lookup Caching Enabled
advanced property, and you cannot edit it.
Lookups that use a dynamic cache
If the Lookup transformation uses a dynamic cache, you must configure the multiple match policy to return an error. Other multiple match policies are not supported.
Salesforce lookups
When you perform a lookup against a Salesforce object, you can return any row or return an error.
Lookups in advanced mode
When you use the Lookup transformation in advanced mode, you can return all rows, return any row, or return an error. The multiple match policies
Return first row
and
Return last row
are not supported.
When you define the behavior for multiple matches in advanced mode to return an error, the Lookup transformation drops duplicate rows and does not include the duplicate rows in the log files.
For more information about the multiple match policies supported by different connectors, see the help for the appropriate connector.

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