WEL language guide
This guide covers the syntax and rules that apply to WEL expressions. Refer to the standard library documentation for details on WEL functions.
- Data types: The 16 WEL data types and when to use each one.
- Operators: Arithmetic, comparison, logic, concatenation, and the pipeline and fallback operators.
- Expressions: How to build a step's field access, conditionals, let bindings, guards, lambdas, and named functions.
- Strings and formatting: String literals, f-string interpolation, and format specifications.
LEARN WEL DATA TYPES
Refer to the Data types guide first. The wrong type at a boundary is a common cause of transformation bugs. Other guides in this section assume you understand data types already.
FEATURE AVAILABILITY
WEL is currently available to select customers. Contact your Customer Success Representative to confirm whether it is available in your workspace.
Related
- Standard library: Information about every WEL function.
- Quickstart: An example showing different WEL workflows.
- Error codes: Troubleshoot job failures.
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