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Table of Contents

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  1. Preface
  2. Introduction to Transformations
  3. Transformation Ports
  4. Transformation Caches
  5. Address Validator Transformation
  6. Aggregator Transformation
  7. Association Transformation
  8. Bad Record Exception Transformation
  9. Case Converter Transformation
  10. Classifier Transformation
  11. Comparison Transformation
  12. Consolidation Transformation
  13. Data Masking Transformation
  14. Data Processor Transformation
  15. Decision Transformation
  16. Duplicate Record Exception Transformation
  17. Expression Transformation
  18. Filter Transformation
  19. Hierarchical to Relational Transformation
  20. Java Transformation
  21. Java Transformation API Reference
  22. Java Expressions
  23. Joiner Transformation
  24. Key Generator Transformation
  25. Labeler Transformation
  26. Lookup Transformation
  27. Lookup Caches
  28. Dynamic Lookup Cache
  29. Macro Transformation
  30. Match Transformation
  31. Match Transformations in Field Analysis
  32. Match Transformations in Identity Analysis
  33. Normalizer Transformation
  34. Merge Transformation
  35. Parser Transformation
  36. Python Transformation
  37. Rank Transformation
  38. Read Transformation
  39. Relational to Hierarchical Transformation
  40. REST Web Service Consumer Transformation
  41. Router Transformation
  42. Sequence Generator Transformation
  43. Sorter Transformation
  44. SQL Transformation
  45. Standardizer Transformation
  46. Union Transformation
  47. Update Strategy Transformation
  48. Web Service Consumer Transformation
  49. Parsing Web Service SOAP Messages
  50. Generating Web Service SOAP Messages
  51. Weighted Average Transformation
  52. Window Transformation
  53. Write Transformation
  54. Appendix A: Transformation Delimiters

Developer Transformation Guide

Developer Transformation Guide

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Guidelines for Overriding the Lookup Query

Guidelines for Overriding the Lookup Query

Certain rules and guidelines apply when you override a lookup query.
Consider the following guidelines when you override the lookup SQL query:
  • You can override the lookup SQL query for relational lookups.
  • Add a source lookup filter to filter the rows that are added to the lookup cache. This ensures that the Integration Service inserts rows in the dynamic cache and target table that match the WHERE clause.
  • If multiple Lookup transformations share a lookup cache, use the same lookup SQL override for each Lookup transformation.
  • If a table name or column name in the lookup query contains a reserved word, enclose the reserved word in quotes.
  • To override the lookup query for an uncached lookup, choose to return any value when the Integration Service finds multiple matches.
  • You cannot add or delete any columns from the default SQL statement.
  • The Developer tool does not validate the syntax of the SQL query. If the SQL override in an unconnected lookup query is not valid, the mapping fails.
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