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

Database Deadlock Resilience

Database Deadlock Resilience

The Lookup transformation is resilient to a database deadlock for uncached lookups. When a database deadlock error occurs, the session does not fail. The Integration Service attempts to re-execute the last statement for a specified retry period.
You can configure the number of deadlock retries and the deadlock sleep interval for an Integration Service. These values also affect database deadlocks for the relational writer. You can override these values at the session level as custom properties.
Configure following Integration Service Properties:
  • NumOfDeadlockRetries.
    The number of times the PowerCenter Integration Service retries a target write on a database deadlock. Minimum is 0. Default is 10. If you want the session to fail on deadlock set NumOfDeadlockRetries to zero.
  • DeadlockSleep.
    Number of seconds before the PowerCenter Integration Service retries a target write on database deadlock.
If a deadlock occurs, the Integration Service attempts to run the statement. The Integration Service waits for a delay period between each retry attempt. If all attempts fail due to deadlock, the session fails. The Integration Service logs a message in the session log whenever it retries a statement.

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