Table of Contents

Search

  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

Static and dynamic lookup comparison

Static and dynamic lookup comparison

You might want to use dynamic cache instead of a static cache if the source might contain duplicate private keys. Or, you might want to use a dynamic cache when the source contains a large table of data to optimize performance.
Data Integration
processes lookup conditions differently based on whether you configure the Lookup transformation to use a static or dynamic cache.
The following table compares a Lookup transformation that uses a static cache to a Lookup transformation that uses a dynamic cache:
Static Lookup Cache
Dynamic Lookup Cache
The cache does not change during the task run.
The task inserts or updates rows in the cache as it passes rows to the target.
You can use a flat file, relational database, and other connection types such as Salesforce for lookup.
You cannot use a flat file or Salesforce connection type.
When the lookup condition is true, the task returns a value from the lookup table or cache.
When the condition is not true, the task returns the default value.
When the lookup condition is true, the task either updates the row in the cache and target or leaves the cache unchanged. This indicates that the row is in the cache and target table.
When the lookup condition is not true, the task either inserts the row in the cache and target or leaves the cache unchanged based on the row type. This indicates that the row is not in the cache or target table.