Table of Contents

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  1. Preface
  2. Transformations
  3. Source transformation
  4. Target transformation
  5. Aggregator transformation
  6. Cleanse transformation
  7. Data Masking transformation
  8. Deduplicate transformation
  9. Expression transformation
  10. Filter transformation
  11. Hierarchy Builder transformation
  12. Hierarchy Parser transformation
  13. Hierarchy Processor transformation
  14. Input transformation
  15. Java transformation
  16. Java transformation API reference
  17. Joiner transformation
  18. Labeler transformation
  19. Lookup transformation
  20. Mapplet transformation
  21. Normalizer transformation
  22. Output transformation
  23. Parse transformation
  24. Python transformation
  25. Rank transformation
  26. Router transformation
  27. Rule Specification transformation
  28. Sequence Generator transformation
  29. Sorter transformation
  30. SQL transformation
  31. Structure Parser transformation
  32. Transaction Control transformation
  33. Union transformation
  34. Velocity transformation
  35. Verifier transformation
  36. Web Services transformation

Transformations

Transformations

Target update override

Target update override

By default,
Data Integration
updates target tables based on key values. However, you can override the default UPDATE statement for each target in a mapping. You might want to update the target based on non-key columns.
You can enter a target update override for relational and ODBC connections. For more information, see the help for the appropriate connector.
Override the UPDATE statement in the Target transformation advanced properties. Enter the target UPDATE statement in the
Update Override
field. Alternatively, click
Configure
to generate the default UPDATE statement and then modify the statement.
Because the target fields must match the target column names, the update statement includes the keyword :TU to specify the fields in the target transformation. If you modify the UPDATE portion of the statement, you must use :TU to specify fields.
When you override the default UPDATE statement, you must enter an SQL statement that is valid for the database.
Data Integration
does not validate the syntax.

Example

A mapping passes the total sales for each salesperson to the T_SALES table.
Data Integration
generates the following default UPDATE statement for the target T_SALES:
UPDATE T_SALES SET EMP_NAME = :TU.EMP_NAME, DATE_SHIPPED = :TU.DATE_SHIPPED, TOTAL_SALES = :TU.TOTAL_SALES WHERE EMP_ID = :TU.EMP_ID
You want to override the WHERE clause to update records for employees named Mike Smith only. To do this, you edit the WHERE clause as follows:
UPDATE T_SALES SET DATE_SHIPPED = :TU.DATE_SHIPPED, TOTAL_SALES = :TU.TOTAL_SALES WHERE :TU.EMP_NAME = EMP_NAME AND EMP_NAME = 'MIKE SMITH'