SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function CAST (children 1)
     ExpressionList (children 2)
      Literal \'[\\\'{}\\\', \\\'{"c" : [1, {"b" : []}]}\\\']\'
      Literal \'Array(JSON)\'
   Set
