SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 4)
    Identifier a
    Identifier b
    Function firstNonDefault (alias result) (children 1)
     ExpressionList (children 3)
      Function plus (children 1)
       ExpressionList (children 2)
        Identifier a
        Identifier b
      Function multiply (children 1)
       ExpressionList (children 2)
        Identifier a
        Identifier b
      Function minus (children 1)
       ExpressionList (children 2)
        Identifier a
        Identifier b
    Function toTypeName (alias type) (children 1)
     ExpressionList (children 1)
      Function firstNonDefault (children 1)
       ExpressionList (children 3)
        Function plus (children 1)
         ExpressionList (children 2)
          Identifier a
          Identifier b
        Function multiply (children 1)
         ExpressionList (children 2)
          Identifier a
          Identifier b
        Function minus (children 1)
         ExpressionList (children 2)
          Identifier a
          Identifier b
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test_first_truthy
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier ALL
