Table of Contents

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  1. Preface
  2. Transformations
  3. Source transformation
  4. Target transformation
  5. Access Policy transformation
  6. B2B transformation
  7. Aggregator transformation
  8. Cleanse transformation
  9. Data Masking transformation
  10. Data Services transformation
  11. Deduplicate transformation
  12. Expression transformation
  13. Filter transformation
  14. Hierarchy Builder transformation
  15. Hierarchy Parser transformation
  16. Hierarchy Processor transformation
  17. Input transformation
  18. Java transformation
  19. Java transformation API reference
  20. Joiner transformation
  21. Labeler transformation
  22. Lookup transformation
  23. Machine Learning transformation
  24. Mapplet transformation
  25. Normalizer transformation
  26. Output transformation
  27. Parse transformation
  28. Python transformation
  29. Rank transformation
  30. Router transformation
  31. Rule Specification transformation
  32. Sequence Generator transformation
  33. Sorter transformation
  34. SQL transformation
  35. Structure Parser transformation
  36. Transaction Control transformation
  37. Union transformation
  38. Velocity transformation
  39. Verifier transformation
  40. Web Services transformation

Transformations

Transformations

Expression format

Expression format

When you use the flattened output, the expression is fixed to the default and can't be changed. But if you understand the syntax of the default expression, you can easily identify the source location of each output field.
To add fields to the output group, use the check boxes next to the incoming field names. This differs from the Add link that you use for relational or hierarchical output.
The Hierarchy Processor transformation can process information from different data sets. Some of the field names might not be unique among the different data sets. As a result, you can't simply reference the field by its name, because the same field name might be used in a different data set, or within the hierarchy of the same data set.
The syntax of the expressions in the Hierarchy Processor transformation differs from that used in the Expression transformation.
To reference a field in a Hierarchy Processor transformation, use the following syntax:
:fld.{input_group_name.field_name}.field_name
The following table describes the syntax in more detail:
Syntax part
Description
.fld.
Denotes the Hierarchy Processor transformation expression syntax.
input_group_name
Name of the input group or dataset.
field_name
Name of the field, including the full path name if it's not a top-level field.
If any field is of the type array, include the array name. If an array is primitive and has no array name, use
elem
as the array name.
For fields within a struct or an array, the actual field name is specified outside of the closing brace.
.field_name
Include the field_name portion only when referencing a field within a struct or an array. Follow these guidelines:
  • For fields within a struct, the field_name portion uses the format:
    .structName.fieldname
  • For fields within an array, the field_name portion uses the format:
    .fieldName

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