Table of Contents

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  1. Preface
  2. Introduction to Test Data Management
  3. Test Data Manager
  4. Projects
  5. Policies
  6. Data Discovery
  7. Creating a Data Subset
  8. Performing a Data Masking Operation
  9. Data Masking Techniques and Parameters
  10. Data Generation
  11. Data Generation Techniques and Parameters
  12. Working with Test Data Warehouse
  13. Analyzing Test Data with Data Coverage
  14. Plans and Workflows
  15. Monitor
  16. Reports
  17. ilmcmd
  18. tdwcmd
  19. tdwquery
  20. Data Type Reference
  21. Data Type Reference for Test Data Warehouse
  22. Glossary

Rules and Guidelines for Expression Masking

Rules and Guidelines for Expression Masking

Use the following rules and guidelines for expression masking:
  • You cannot use the output from an expression as input to another expression. If you manually add the output column name to the expression, you might get unexpected results.
  • Select functions, columns, variables, and operators from the point-and-click interface to minimize errors when you build expressions.
  • If the data masking rule is configured for repeatable masking, specify the storage table in the data masking plan. If the storage table does not exist, the data masking operation fails.