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

Pass-Through Ports Configuration

Pass-Through Ports Configuration

You can add pass-through ports to the SQL transformation. Pass-through ports are input/output ports that pass data through the transformation. The SQL transformation returns data from the pass-through ports whether a SQL query returns rows or not.
When the source row contains a SELECT query statement, the SQL transformation returns the data in the pass-through port in each row it returns from the database. If the query result contains multiple rows, the SQL transformation repeats the pass-through data in each row.
When a query returns no rows, the SQL transformation returns the pass-through column data with null values in the output columns. For example, queries that contain INSERT, UPDATE, and DELETE statements return no rows. When the query has errors, the SQL transformation returns the pass-through column data, the SQLError message, and null values in the output ports.
To create a pass-through port:
  • Create an input port and enable it for output. The Designer creates an output port and adds an “_output” suffix to the port name.
  • Drag a port from a Source Qualifier transformation to the SQL transformation. The Designer creates a pass-through port.

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