SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier tab2
   ExpressionList (children 2)
    OrderByElement (children 1)
     Function toStartOfDay (children 1)
      ExpressionList (children 1)
       Identifier x
    OrderByElement (children 1)
     Function intDiv (children 1)
      ExpressionList (children 2)
       Function intDiv (children 1)
        ExpressionList (children 2)
         Identifier y
         Literal Int64_-2
       Literal Int64_-3
