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Improve formula validation #1356

@simonvoelcker

Description

@simonvoelcker

What's needed?

Formulas need to be fully validated and error messages must be clear even for non-technical users.

Proposed solution

  • Add any missing validation to the formula parser+lexer.
  • Improve error messages.
  • Add tests for all validation (currently missing).

Use cases

Formulas defined by users who are unfamiliar with the formula grammar and functions.

Alternatives and workarounds

No response

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part:data-pipelineAffects the data pipelinetype:enhancementNew feature or enhancement visitble to users

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