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

Informix

Informix

In Informix, the syntax for declaring an output parameter differs from other databases. With most databases, you declare variables using IN or OUT to specify if the variable acts as an input or output parameter. Informix uses the keyword RETURNING, making it difficult to distinguish input/output parameters from return values. For example, you use the RETURN command to return one or more output parameters:
CREATE PROCEDURE GET_NAME_USING_ID (nID integer) RETURNING varchar(20); define nID integer; define outVAR as varchar(20); SELECT FIRST_NAME INTO outVAR FROM CONTACT WHERE ID = nID return outVAR; END PROCEDURE;
Notice that in this case, the RETURN statement passes the value of outVAR. Unlike other databases, however, outVAR is not a return value, but an output parameter. Multiple output parameters would be returned in the following manner:
return outVAR1, outVAR2, outVAR3
Informix does pass a return value. The return value is not user-defined, but generated as an error-checking value. In the transformation, the R value must be checked.

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