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@djluck djluck released this 19 Feb 06:45
· 18 commits to master since this release
2.0.0
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Learn about vigilant mode.

Adding stronger validation of PromQL expressions, principally type checking which will allow consumers to validate the type an expression produces.

This has meant a lot of improvements:

  • Aggregate operator and function signatures are now defined in the library and parameter counts and types can be checked.
  • Binary expressions are now parsed with the (correct) associativeness: left associativeness.
  • Binary operators now have precedence associated with them and binary expressions are grouped according to this
  • Every expression can determine it's return type
  • Expression types preceeding offset expressions are now validated more carefully
  • Positions of parsed expressions from the source input are now available in all AST nodes
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