hadrienk/java-vtl

Union operator

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hadrienk commented

Implement union (records)

Syntax
Dataset ds_2 := union (Dataset ds_1 {, Dataset<?> ds_1}*)

Test:

  • Test antlr grammar
  • Create antlr grammar
  • Test that all the Datasets ds_1 must have the same IdentifierComponents and MeasureComponents, in name and type (static).
  • If only one argument is given, it is returned unchanged.
  • Test that in the output there cannot be two rows with the same values for all the IdentifierComponents and MeasureComponents.
  • Test Attribute propagation
  • Implement a Visitor in the script