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

Step 2. Add the Lookup Condition

Step 2. Add the Lookup Condition

After you configure the ports, define a lookup condition to compare transformation input values with values in the lookup source or cache. To increase performance, add conditions with an equal sign first.
In this case, add the following lookup condition:
ITEM_ID = IN_ITEM_ID PRICE <= IN_PRICE
If the item exists in the mapping source and lookup source and the mapping source price is less than or equal to the lookup price, the condition is true and the lookup returns the values designated by the Return port. If the lookup condition is false, the lookup returns NULL. When you write the update strategy expression, use ISNULL nested in an IIF function to test for null values.

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