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

Blocking Functions

Blocking Functions

When the Custom transformation contains multiple input groups, you can write code to block the incoming data on an input group.
Consider the following rules when you use the blocking functions:
  • You can block at most
    n
    -1 input groups.
  • You cannot block an input group that is already blocked.
  • You cannot block an input group when it receives data from the same source as another input group.
  • You cannot unblock an input group that is already unblocked.
PowerCenter provides the following blocking functions:
  • INFA_CTBlockInputFlow().
    Allows the procedure to block an input group.
    Use the following syntax:
    INFA_STATUS INFA_CTBlockInputFlow(INFA_CT_INPUTGROUP_HANDLE group);
  • INFA_CTUnblockInputFlow().
    Allows the procedure to unblock an input group.
    Use the following syntax:
    INFA_STATUS INFA_CTUnblockInputFlow(INFA_CT_INPUTGROUP_HANDLE group);
    The following table describes the argument for this function:
    Argument
    Datatype
    Input/
    Output
    Description
    group
    INFA_CT_INPUTGROUP_HANDLE
    Input
    Input group handle.
The return value datatype is INFA_STATUS. Use INFA_SUCCESS and INFA_FAILURE for the return value.

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