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

Relational Database Function Exceptions

Relational Database Function Exceptions

Use the following rules and guidelines when pushing functions to the relational database:
  • When you push LAST_DAY() to Oracle, Oracle returns the date up to the second. If the input date contains subseconds, Oracle trims the date to the second.
  • When you push LTRIM, RTRIM, or SOUNDEX to a database, the database treats the argument (' ') as NULL, but the PowerCenter Integration Service treats the argument (' ') as spaces.
  • When you push SYSDATE or SYSTIMESTAMP to the database, the database server returns the timestamp in the time zone of the database server, not the PowerCenter Integration Service.
  • If you push SYSTIMESTAMP to an IBM DB2 or a Sybase database, and you specify the format for SYSTIMESTAMP, the database ignores the format and returns the complete time stamp.
  • An IBM DB2 database and the PowerCenter Integration Service produce different results for STDDEV and VARIANCE. IBM DB2 uses a different algorithm than other databases to calculate STDDEV and VARIANCE.
  • To push TO_DATE() function to an IBM DB2 database, you must use formats such as YYYYMMDD, YYYYMMDD HH24MISS, YYYY-MM-DD HH24MISS, YYYYMMDD HH24:MI:SS, YYYY/MM/DD HH24:MI:SS, and YYYY/MM/DD HH24MISS.