Query a resultset in java like CFQUERY

Hello,
Is there a way to query a resultset in java. Yes what I mean is after obtaining one resultset, again query on that resultset like we do to a table in the DB.
Here is my problem in detail and any help doing the same in Java will be most appreciated :-)
I am working on a peculiar problem where we are moving our application from cold fusion to Java. Cold fusion being very powerful for database oriented applications my project was initially developed using CF and uses a lot of advanced features of CF. However the need to move to java was soon realised due to various reasons. Now one of the main problems we are facing is the CFQUERY tag in cold fusion.
This tag lets you create a resultset by
<cfquery name="aaa" datasource="blah-blah">
QUERY COMES HERE
</cfquery>
The best part is.... you can also query the above resultset obtained as follows:
<cfquery name="bbb" dbtype="query">
SELECT * from aaa where ***************
</cfquery>
We have used it so often in CF since it significantly reduces the query throughput times. Now we would love to find a way to do the same in Java.
Any ideas
Thanks
Karen

Yes thats one way of working with it. But the problem
is we are dealing with very huge volume of data and
hence querying an already existing resultset is the
best option and has been working very well with our
kind of project too. We also have several concurrent
users doing the same which adds more load on the DB so
doing it from the CF/Java end seems a better choice
for us.I understand your sentiment, but having worked with applications trying to 'port' applications to new technologies I would have some concerns with your approach. Rather then 'port' the application I would suggest that you will have to re-engineer the application. This is more true for larger systems where larger system is heavy mulit-user, or large database access. It is also more true for applications moving from procedural to object based languages.
I don't agree that you are better off manipulating data on the application server. In my experience I have found that data manipulation is optimized when running as close to the database as possible (for the reasons listed in my previous post). So if you decide to re-engineer you may want to consider this in your design decisions.
We already have the DB so we are not even considering
looking for another one. BTW we're using SQL SERVER.Well, as long as you don't have too many users (darn that original sybase lock manager) :-)
I too can't think of a way to get this done using Java
like CF. Hmmm .... yeah if nothing else then we'll
have to change the way we work all together.I have no experience in using it, but user "cluckcluck" posted the following. Might be something to take a look at. This is similar to what I was talking about when using embedded Java databases like Cloudscape, but this works with external databases:
"An excellent solution for this sort of problem is Hibernate (www.hibernate.org) a DB independent ORM persistance layer. Each data source would need to be defined, and each datasource would have its own SessionFactory but once this mapping and config is done you can treat the contents of the DB as POJOs, and perform queries against them. Its not so generic that you wouldn't still have to know which data model the entity you are after is in..."
Good Luck!

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Create a CF Query Result Set in Java

I'd like to programatically build a ColdFusion query resultset inside of a Java class and return it to the calling application. See the Java psudocode below to see what I'm talking about:
public class MyClass {
     public coldfusion.sql.QueryTable getQuery() {
          // Create a query table object
          QueryTable myTable = ..?
          // Loop through some set of instance data for my class
          for(int c = 0; c < this.myWigets.length; c++) {
               int row = c+1;
               myTable.setField(row, nameCol, this.myWigets[c].name);
               myTable.setField(row, colorCol, this.myWigets[c].color);
          return myTable;
I've had stuff like this partially working in the past but had issues with things like query of queries and such probably due to the hacks used to create the QueryTable object. I'm mainly just checking in to see if there has been any progress made in this area. To me this seems like such an obvious thing for a Java developer working within CF to want to do. I'm surprised Adobe doesn't have an officially supported API for doing this sort of thing (or maybe I'm just too dumb to find it.) A few other notes... I'm not using CFX, and I'm not starting with a java.sql.ResultSet otherwise I would use the QueryTable(java.sql.ResultSet) constructor. I need to build this thing from scratch programatically.
Thanks for your time. I hope this question makes sense to someone out there.
- Mike

I appologize. I wasn't very clear with my original question.
I'm creating an instance of my Java class from within CF using createObject("java", "com.example.MyClass"). So based on the sample code in my original post on the CF side I'd like to do something like this:
<cfscript>
     myObj = createObject("java", "com.example.MyClass");
     myObj.doSomeStuff();
     myCFQuery = myObj.getQuery(); // Return a CF query from my java class
</cfscript>
... then do stuff like ...
<cfquery name="mySortedQuery" dbtype="query">
     select     *
     from       myCFQuery
     order      by color
</cfquery>
I appriciate your suggestions so far. I have other solutions working already but they are not ideal. I was just hoping someone had a clean and as-hack-free-as-possible way of creating a ColdFusion query result set in Java and passing it back to CF.
Thanks again,
Mike

Problem with return a ColdFusion query object from a Java class

Hi!
I need to return a ColdFusion query object from a Java class
using a JDBC result set ( java.sql.ResultSet);
I have tried to pass my JDBC result set in to the constructor
of the coldfusion.sql.QueryTable class with this code:
ColdFusion code
<cfset pra = createObject("java","QueryUtil").init()>
<cfset newQuery = CreateObject("java",
"coldfusion.sql.QueryTable")>
<cfset newQuery.init( pra.getColdFusionQuery () ) >
My java class execute a query to db and return QueryTable
Java code (QueryUtil.java)
import coldfusion.sql.QueryTable; // (CFusion.jar for class
QueryTable)
import com.allaire.cfx //(cfx.jar for class Query used from
QueryTable)
public class QueryUtil
public static coldfusion.sql.QueryTable
getColdFusionQuery(java.sql.ResultSet rs)
return new coldfusion.sql.QueryTable(rs);
but when i run cfm page and coldfusion server tries to
execute : "<cfset pra =
createObject("java","QueryUtil").init()>" this error appears:
Object Instantiation Exception.
An exception occurred when instantiating a java object. The
cause of this exception was that: coldfusion/sql/QueryTable.
If i try to execute QueryUtil.java with Eclipse all it works.
Also I have tried to return java.sql.ResultSet directly to
coldfusion.sql.QueryTable.init () with failure.
Do you know some other solution?

ok
i print all my code
pratica.java execute a query to db and return a querytable
java class
import java.util.*;
import java.sql.*;
import coldfusion.sql.*;
public class Pratica {
private HashMap my;
private String URI,LOGIN,PWD,DRIVER;
private Connection conn=null;
//funzione init
//riceve due strutture converite in hashmap
// globals
// dbprop
public Pratica(HashMap globals,HashMap dbprop) {
my = new HashMap();
my.put("GLOBALS",globals);
my.put("DBPROP",dbprop);
URI = "jdbc:sqlserver://it-bra-s0016;databaseName=nmobl";
LOGIN = "usr_dev";
PWD = "developer";
DRIVER = "com.microsoft.sqlserver.jdbc.SQLServerDriver";
try{
// Carico il driver JDBC per la connessione con il database
MySQL
Class.forName(DRIVER);
/* Connessione alla base di dati */
conn=DriverManager.getConnection(URI,LOGIN,PWD);
if(conn!=null) System.out.println("Connection Successful!");
} catch (ClassNotFoundException e) {
// Could not find the database driver
System.out.print("\ndriver non trovato "+e.getMessage());
System.out.flush();
catch (SQLException e) {
// Could not connect to the database
System.out.print("\nConnessione fallita "+e.getMessage());
System.out.flush();
//funzione search
//riceve un hash map con i filtri di ricerca
public QueryTable search(/*HashMap arg*/) {
ResultSet rs=null;
Statement stmt=null;
QueryTable ret=null;
String query="SELECT * FROM TAN100pratiche";
try{
stmt = conn.createStatement();// Creo lo Statement per
l'esecuzione della query
rs=stmt.executeQuery(query);
// while (rs.next()) {
// System.out.println(rs.getString("descrizione"));
catch (Exception e) {
e.printStackTrace();
try {
ret = Pratica.RsToQueryTable(rs);
} catch (SQLException e) {
e.printStackTrace();
this.close();
return(ret);
// ret=this.RsToQuery(rs);
// this.close(); //chiude le connessioni,recordset e
statament
//retstruct CF vede HashMap come struct
//METODO DI TEST
public HashMap retstruct(){
return(my);
//conversione resultset to querytable
private static QueryTable RsToQueryTable(ResultSet rs)
throws SQLException{
return new QueryTable(rs);
//chiura resultset statament e connessione
private void close(){
try{
conn.close();
conn=null;
catch (Exception e) {
e.printStackTrace();
coldfusion code
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01
Transitional//EN">
<html>
<head>
<title>Test JDBC CFML Using CFScript</title>
</head>
<body>
<cftry>
<cfset glb_map =
createObject("java","java.util.HashMap")>
<cfset dbprop_map =
createObject("java","java.util.HashMap")>
<cfset glb_map.init(glb)> 
<cfset dbprop_map.init(glb["DBPROP"])>
<cfset pra =
createObject("java","Pratica").init(glb_map,dbprop_map)>
<cfset ourQuery
=createObject("java","coldfusion.sql.QueryTable").init(pra.search())>
<cfcatch>
<h2>Error - info below</h2>
<cfdump var="#cfcatch#"><cfabort>
</cfcatch>
</cftry>
<h2>Success - statement dumped below</h2>
<cfdump var="#ourQuery#">
</body>
</html>
error at line <cfset pra =
createObject("java","Pratica").init(glb_map,dbprop_map)>
An exception occurred when instantiating a java object. The
cause of this exception was that: coldfusion/sql/QueryTable.
-----------------------------------------------------------------------

Size Limitation for ResultSet in JAVA

when i execute a query as
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It throws an error saying "Please Use Server Side Cursor for large resultset"...
But when i execute the same in SQL Query Analyzer, it returns the row properly without any issue...
When i try the same in application... it couldnt return the rows to the ResultSet......
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Thanks in Advance...

Hi,
Thanks for the link, but I didn't see any answers for
my question.....my question is if there is a way that
ResultSet hold all the query results?
Thanks again,
KatieDid you read this part:
" Result Set Limitations and Downgrade Rules
Some types of result sets are not feasible for certain kinds of queries. If you specify an unfeasible result set type or concurrency type for the query you execute, the JDBC driver follows a set of rules to determine the best feasible types to use instead.
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Query is throwing an error like missing right paranthesis.,

Hi,
The below query is throwing an error like missing right paranthesis.,
and Is there any way to write the same query in a simpler way ?
SELECT AVALABLEBALANCE
FROM (
( SELECT SUM(TH1.TRANSACTIONAMOUNT)
FROM TRANSACTIONHISTORY TH1,
TRANSACTIONTYPE TT,
CARDDETAIL CD,
P2P_CARDDETAIL P2P
WHERE TH1.TRANSACTIONTYPEID = TT.TRANSACTIONTYPEID
AND TH1.CARDID = CD.CARDID
AND CD.CARDID = P2P.CARDID
AND TH1.CARDID = 6013
AND TT.TRANSACTIONTYPECODE IN ('WITHDRAWAL_CHECK_FEE')
AND TRUNC(TH1.TRANSACTIONDATETIME) = TRUNC(TH3.TRANSACTIONDATETIME)
GROUP BY TH1.TRANSACTIONTYPEID,TH1.CARDID,TRUNC(TH1.TRANSACTIONAMOUNT)) -
( SELECT SUM(TH2.TRANSACTIONAMOUNT)
FROM TRANSACTIONHISTORY TH2,
TRANSACTIONTYPE TT,
CARDDETAIL CD,
P2P_CARDDETAIL P2P
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AND TH2.CARDID = CD.CARDID
AND CD.CARDID = P2P.CARDID
AND TH2.CARDID = 6013
AND TT.TRANSACTIONTYPECODE IN ('FUND_TRANSFER_RECEIVED')
AND TRUNC(TH2.TRANSACTIONDATETIME) = TRUNC(TH3.TRANSACTIONDATETIME)
GROUP BY TH2.TRANSACTIONTYPEID,TH2.CARDID,TRUNC(TH2.TRANSACTIONAMOUNT))
) T , TRANSACTIONHISTORY TH3
WHERE TH3.CARDID = 6013

Hi Sekar,
Here is your formatted code:
/* Formatted on 2007/11/16 16:42 (Formatter Plus v4.8.0) */
SELECT avalablebalance
FROM ((SELECT SUM (th1.transactionamount)
FROM transactionhistory th1,
transactiontype tt,
carddetail cd,
p2p_carddetail p2p
WHERE th1.transactiontypeid = tt.transactiontypeid
AND th1.cardid = cd.cardid
AND cd.cardid = p2p.cardid
AND th1.cardid = 6013
AND tt.transactiontypecode IN ('WITHDRAWAL_CHECK_FEE')
AND TRUNC (th1.transactiondatetime) =
TRUNC (th3.transactiondatetime)
GROUP BY th1.transactiontypeid,
th1.cardid,
TRUNC (th1.transactionamount))
MINUS
(SELECT SUM (th2.transactionamount)
FROM transactionhistory th2,
transactiontype tt,
carddetail cd,
p2p_carddetail p2p
WHERE th2.transactiontypeid = tt.transactiontypeid
AND th2.cardid = cd.cardid
AND cd.cardid = p2p.cardid
AND th2.cardid = 6013
AND tt.transactiontypecode IN ('FUND_TRANSFER_RECEIVED')
AND TRUNC (th2.transactiondatetime) =
TRUNC (th3.transactiondatetime)
GROUP BY th2.transactiontypeid,
th2.cardid,
TRUNC (th2.transactionamount))) t,
transactionhistory th3
WHERE th3.cardid = 6013
-Edit: Lol this forum's text box does not have a proper formatter to show our codes perfectly :(.. Very sorry about the expected format here.. Lol !!
***Lol Poor Format***
Message was edited by:
user599090
I replaced the '-' with MINUS Keyword. That was the mistake you made i guess.

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rs=st.executeQuery("SQL");
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while(rs1.next())
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while(rs.next())
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while(rs1.next())
}

yup no problem..if it doesn work declare the second one as st1

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screen_simu wrote:
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Query a resultset in java like CFQUERY

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