Table of Contents

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