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Table of Contents

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  1. Preface
  2. Understanding Pipeline Partitioning
  3. Partition Points
  4. Partition Types
  5. Pushdown Optimization
  6. Pushdown Optimization and Transformations
  7. Real-time Processing
  8. Commit Points
  9. Row Error Logging
  10. Workflow Recovery
  11. Stopping and Aborting
  12. Concurrent Workflows
  13. Grid Processing
  14. Load Balancer
  15. Workflow Variables
  16. Parameters and Variables in Sessions
  17. Parameter Files
  18. FastExport
  19. External Loading
  20. FTP
  21. Session Caches
  22. Incremental Aggregation
  23. Session Log Interface
  24. Understanding Buffer Memory
  25. High Precision Data

Advanced Workflow Guide

Advanced Workflow Guide

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Using Predefined Workflow Variables in Expressions

Using Predefined Workflow Variables in Expressions

When you use a workflow variable in an expression, the Integration Service evaluates the expression and returns True or False. If the condition evaluates to true, the Integration Service runs the next task. The Integration Service writes an entry in the workflow log similar to the following message:
INFO : LM_36506 : (1980|1040) Link [Session2 --> Session3]: condition is TRUE for the expression [$Session2.PrevTaskStatus = SUCCEEDED].
The Expression Editor displays the predefined workflow variables on the Predefined tab. The Workflow Manager groups task-specific variables by task and lists built-in variables under the Built-in node. To use a variable in an expression, double-click the variable. The Expression Editor displays task-specific variables in the Expression field in the following format:
$<TaskName>.<predefinedVariable>