SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tab
   Function not (children 1)
    ExpressionList (children 1)
     Function hasToken (children 1)
      ExpressionList (children 2)
       Identifier text
       Literal \'\'
