20 Transform Function Reference

This section lists data types, discusses data type conversions that take place when transformation scripts are applied, provides a list of reserved words and unsupported features of Groovy, and contains examples of custom transform function usage. It also includes the reference documentation for the custom transform functions in Studio.

Use this section together with the Transform API Reference (generated Groovydoc documentation for the custom functions).

• Data types
  In transformation scripts, the attribute's data type is represented as a Groovy data type. This topic discusses how the Dgraph data types match the Groovy data types.
• Data type conversions
  When you apply your transformation script to the project data set or click Create a new data set from within Transform), the Data Processing component converts most of the Hive data types to its corresponding Dgraph data types. However, this can result in some of the original data types being changed or omitted. This topic discusses these data type conversions in detail.
• Groovy reserved keywords and unsupported functions
  This topic lists reserved keywords and those Groovy language features that are not supported in Studio.
• Conditional statements and multi-assign values
  This section contains examples of transformations using conditional statements and multi-assign values.
• List of transform functions
  This section lists and describes custom transform functions in Big Data Discovery.