Table of Contents

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  1. Preface
  2. Working with Transformations
  3. Aggregator Transformation
  4. Custom Transformation
  5. Custom Transformation Functions
  6. Data Masking Transformation
  7. Data Masking Examples
  8. Expression Transformation
  9. External Procedure Transformation
  10. Filter Transformation
  11. HTTP Transformation
  12. Identity Resolution Transformation
  13. Java Transformation
  14. Java Transformation API Reference
  15. Java Expressions
  16. Java Transformation Example
  17. Joiner Transformation
  18. Lookup Transformation
  19. Lookup Caches
  20. Dynamic Lookup Cache
  21. Normalizer Transformation
  22. Rank Transformation
  23. Router Transformation
  24. Sequence Generator Transformation
  25. Sorter Transformation
  26. Source Qualifier Transformation
  27. SQL Transformation
  28. Using the SQL Transformation in a Mapping
  29. Stored Procedure Transformation
  30. Transaction Control Transformation
  31. Union Transformation
  32. Unstructured Data Transformation
  33. Update Strategy Transformation
  34. XML Transformations

Transformation Guide

Transformation Guide

Tips for Aggregator Transformations

Tips for Aggregator Transformations

Use sorted input to decrease the use of aggregate caches.
Sorted input reduces the amount of data cached during the session and improves session performance. Use this option with the Sorter transformation to pass sorted data to the Aggregator transformation.
The Aggregator transformation might not provide sorted output.
To sort output from an Aggregator transformation, use a Sorter transformation.
Limit connected input/output or output ports.
Limit the number of connected input/output or output ports to reduce the amount of data the Aggregator transformation stores in the data cache.
Filter the data before aggregating it.
If you use a Filter transformation in the mapping, place the transformation before the Aggregator transformation to reduce unnecessary aggregation.

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