SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 6)
    Identifier id
    Identifier source
    Identifier except_null
    Function arrayExcept (alias result) (children 1)
     ExpressionList (children 2)
      Identifier source
      Identifier except_null
    Identifier expected
    Function if (alias status) (children 1)
     ExpressionList (children 3)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier result
        Identifier expected
      Literal \'OK\'
      Literal \'NOK\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier 3538_array_except1
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier id
