SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 1)
    Identifier val
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tab
   Function notEquals (children 1)
    ExpressionList (children 2)
     Function now (children 1)
      ExpressionList (children 1)
       Identifier tz
     Function toDateTime (children 1)
      ExpressionList (children 1)
       Literal \'2000-01-01 00:00:00\'
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier val
   Set