RECORDSET PAGING

I am using FIRST and SKIP (Firebird SQL) for recordset paging to reduce the time it takes for my records to travel from the server to the client.

This works great because instead of sending thousands of records across the wire to be paged by my ASP code, only the 10, 20, 50 etc. records that are selected will be sent.

In order to calculate how many records to skip, I need to get a count of how many records are in the recordset. That means I am running a SQL statement to get the recordcount and then another SQL statement to actually get the records. There must be a way to combine these statements? Currently, I am only getting the recordcount on the first run but this won't account for newly updated transactions.

<%
'Records per page
      recordsPerPage = Request("recordsPerPage")
      If recordsPerPage = "" Then recordsPerPage = 10

'Current page
      currentPage = Request("currentPage")
      If currentPage = "" Then currentPage = 1

' Create and Open Database/Recordset Object
      Call dbConn(objConn)
      Call openRS(objRS)
      objRS.CursorLocation = 3
      objRS.CacheSize = recordsPerPage
      
' How many records in recordset? This is what I would like to replace/combine with following SQL statement
' Only runs on the first time through but doesn't account for new transactions
      If Request("howManyRecords") = "" Then
            objRS.Open "Select COUNT(AGPDR) AS howManyRecords From TABLEA", objConn
            howManyRecords = objRS("howManyRecords")
            objRS.Close      
      Else
            howManyRecords = Request("howManyRecords")
      End If
      
'Calculate records to skip
      totalPages = (howManyRecords/recordsPerPage)
      temp = fix(totalPages)
      if totalPages-temp <> 0 then totalPages = temp+1 else totalPages=temp
      numSkip =  (currentPage * recordsPerPage) - recordsPerPage
      If CINT(numSkip) > CINT(howManyRecords) then numSkip = howManyRecords - recordsPerPage      

' Open database and retrieve records
      strSQL = "Select FIRST " &CINT(recordsPerPage)& " SKIP " &CINT(numSkip)& " FIELD1, FIELD2, FIELD3 "
      strSQL = strSQL & "FROM TABLEA"
      objRS.Open strSQL, objConn


response.write "Number of records: " &howManyRecords& "<br>"
response.write "Total Pages: " &totalPages& "<br>"
response.write "Current Page: " &currentPage& "<br>"
response.write "Skip: " &numSkip& "<br><br>"

%>

<table border="0" cellspacing="0" cellpadding="2">
 <tr><td colspan="3"></td></tr>
 <tr>
  <td><b>COLUMN1</b></td>
  <td><b>COLUMN2</b></td>
  <td><b>COLUMN3</b></td>
 </tr>

<%

Do While Not objRS.EOF
%>    
 <tr><td colspan="3"></td></tr>
 <tr>
  <td><b><%=FIELD1%></a></b></td>
  <td><b><%=FIELD2%></a></b></td>
  <td><b><%=FIELD3%></a></b></td>
 </tr>

<%
objRS.MoveNext
Loop

Call closeRS(objRS)
Call closeDB(objConn)  

%>

</table>

<!-- Begin Page Navigation -->
<form name="MovePage" method="POST" action="thisPage.asp">
      <input type="hidden" name="howManyRecords" value="<%=howManyRecords%>">
      <input type="hidden" name="totalPages" value="<%=totalPages%>">

      <!-- The dropdown box for selecting the number of records to display -->
      <select name="recordsPerPage" onchange="MovePage.submit()">
            <option value="10">10</option>
              <option value="20">20</option>
                   <option value="50">50</option>
            </select>
<%    
'Display Next / Prev buttons
If currentPage > 1 then
      'Show previous buttons
      Response.Write("<INPUT TYPE=BUTTON VALUE=&lt;&lt; ONCLICK=""document.location.href='thisPage.asp?currentPage=1&recordsPerPage="&recordsPerPage&"&howManyRecords="&howManyRecords&"';""> ")
      Response.Write("<INPUT TYPE=BUTTON VALUE=&lt; ONCLICK=""document.location.href='thisPage.asp?currentPage="&currentPage-1&"&recordsPerPage="&recordsPerPage&"&howManyRecords="&howManyRecords&"';""> ")
End If

If CInt(currentPage) <> CInt(totalPages) then
      'Show next buttons
      Response.Write("<INPUT TYPE=BUTTON VALUE=&gt; ONCLICK=""document.location.href='thisPage.asp?currentPage="&currentPage+1&"&recordsPerPage="&recordsPerPage&"&howManyRecords="&howManyRecords&"';""> ")
      Response.Write("<INPUT TYPE=BUTTON VALUE=&gt;&gt; ONCLICK=""document.location.href='thisPage.asp?currentPage="&totalPages&"&recordsPerPage="&recordsPerPage&"&howManyRecords="&howManyRecords&"';""> ")
End If  
%>
         &nbsp; Go To Page

<select name="currentPage" onchange="MovePage.submit()">
<%
' Dynamically generate page numbers
      For i = 1 to totalPages
            If i = CInt(currentPage) Then y = "selected" else y = ""
            Response.Write "<OPTION " &y& " VALUE="&i&">" & i & "</OPTION>"
      Next
%>
</select>

Page <%=currentPage%> of <%=totalPages%>
</form>