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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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Sequences

Sequences

To push Sequence Generator transformation logic to a database, you must configure the session for pushdown optimization with sequences.
If you configure a session to push Sequence Generator transformation logic to a database, the Integration Service completes the following tasks:
  1. Creates a sequence object in the database
    . The Integration Service creates the sequence object in the database based on the Sequence Generator transformation logic. The Integration Service creates a unique name for each sequence object. To create a unique sequence object name, it adds the prefix PM_S to a value generated by a hash function.
  2. Generates the SQL query and executes it against the database
    . The Integration Service generates and executes the SQL query to push the Sequence Generator transformation logic to the database.
  3. Drops the sequence object from the database.
     When the transaction completes, the Integration Service drops the sequence object that it created in the database.