SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function JSONExtract (children 1)
     ExpressionList (children 2)
      Literal \'{"a": "123", "b": 456, "c": [7, 8, 9]}\'
      Literal \'Tuple(a String, b String, c String)\'