SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function JSONExtractKeysAndValues (children 1)
     ExpressionList (children 2)
      Literal \'{"a": "hello", "b": [-100, 200.0, 300]}\'
      Literal \'Array(Float64)\'