`select.alias` should only be present when `select.path` is used

FHIR / sql-on-fhir-v2

This project provides the source for the SQL on FHIR v2.0 Implementation Guide

https://build.fhir.org/ig/FHIR/sql-on-fhir-v2/

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`select.alias` should only be present when `select.path` is used #120

Closed jmandel closed 1 year ago

jmandel commented 1 year ago

We should have a co-occurrence constraint so that alias is only allowed at a leaf of the query (i.e., where path is used to extract a specific value).