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

Query Mode Resilience

Query Mode Resilience

When a database connection error occurs while the Integration Service is executing a SQL query for an input row, the Integration Service attempts to reconnect to the database.
Use the following rules and guidelines for resiliency in query mode:
  • When the Integration Service is executing the first query in a list, and a database connection failure occurs, the Integration Service re-executes the first query in the list for the row. It executes the rest of the queries for that row.
  • If the first query statement is a SELECT statement and a communication failure occurs after some rows are flushed downstream in the pipeline, the session fails.
  • If a connection failure occurs while the Integration Service is executing a query that not the first query in a list, the Integration Service re-connects to the database and skips the rest of the queries for the current row. Query results might be lost for the previous rows.
  • If the Integration Service is not able to reconnect to the database, the session fails if the SQL transformation is using a static connection. If the SQL transformation is using a dynamic connection, the session continues.
  • If the SQL query in the list has an explicit commit or rollback statement, any query results that were created after the commit point will be lost when the session continues.

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