Scrollable/Read_only ResultSet objects

I am trying to create an instance of a scrollable/read_only ResultSet object with the following code:
Statement stmt = con.createStatement(
ResultSet.TYPE_SCROLL_INSENSITIVE,
ResultSet.CONCUR_READ_ONLY);
ResultSet rs = stmt.executeQuery("SELECT * FROM ...");
The Connection object has been made successfully but am getting an AbstractMethodError Exception at line 1.
Can anyone please help me out here.
Thank you.

I don't believe the Oracle driver allows for
read/only. I'll take a look at the Oracle website,
and see if I can verify that.
JoelSorry, I was wrong on this. From the Oracle JDBC documentation, it states that CONCUR_READ_ONLY is valid for the Oracle 8 and Oracle 9 drivers. Are you using classes12.zip or classes12.jar for your Oracle libraries?

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I am trying to create an instance of a scrollable/updateable ResultSet object with the following code:
Statement stmt = con.createStatement(
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ResultSet.CONCUR_UPDATABLE);
ResultSet rs = stmt.executeQuery("SELECT * FROM sch.a");
The Connection object has been made successfully but am getting an AbstractMethodError Exception at line 1.
Can anyone please help me out here.
Thanks
I am using JDK 1.3.1 and JDBC 2.0

I use this and works fine for me....let me know how it goes...
ResultSet resultSetMultCond = null;
Statement getMultPartCond = null;
String sqlMultCond = null;
sqlMultCond = "SELECT #PART,#CONDS,COUNT(*) AS MCOUNT FROM MYLIB WHERE #PART = 'A123' GROUP BY #PART,#CONDS ORDER BY #PART";
getMultPartCond = conn.createStatement(java.sql.ResultSet.TYPE_SCROLL_SENSITIVE,java.sql.ResultSet.CONCUR_UPDATABLE);
resultSetMultCond = getMultPartCond.executeQuery(sqlMultCond);

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Is there any effective way to retrieve the size of ResultSet object while the type of the ResultSet itself is a default one (TYPE_FORWARD_ONLY) ?

Maybe I was a little harsh ...or lazy to type anything. I don't think there are any efficient ways to count the number of rows in a ResultSet(for scrollable, forward only, etc)
You could do the following:
rs= statement.executeQuery("select count(column1) from table1 where column1<100");
rs.next();
long recordCount = rs.getLong(1);
before executing your real query
rs = statement.executeQuery("select column1 from table1 where column1<100");
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IS it possible to define two resultset objects with two different queries inside the same DB class?java.sql.SQLException: Invalid state, the ResultSet object is closed.
     at net.sourceforge.jtds.jdbc.JtdsResultSet.checkOpen(JtdsResultSet.java:299)
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     at DB5.getDetails(Daily_Quote_Response_report.java:238)
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java.util.List items = null;
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        try {
            query =
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Edited by: bobz on 03-Dec-2009 11:16

Note: This thread was originally posted in the [Java Programming|http://forums.sun.com/forum.jspa?forumID=31] forum, but moved to this forum for closer topic alignment.

Using all types of resultset Objects i need a single program

i think all of u know that there are 8 types of resultset objects are there in jdbc technology i.e
# next() - moves the cursor forward one row. Returns true if the cursor is now positioned on a row and false if the cursor is positioned after the last row.
# previous() - moves the cursor backwards one row. Returns true if the cursor is now positioned on a row and false if the cursor is positioned before the first row.
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does not contain any rows.
# last() - moves the cursor to the last row in the ResultSet object. Returns true if the cursor is now positioned on the last row and false if the ResultSet object
does not contain any rows.
# beforeFirst() - positions the cursor at the start of the ResultSet object, before the first row. If the ResultSet object does not contain any rows, this method has
no effect.
# afterLast() - positions the cursor at the end of the ResultSet object, after the last row. If the ResultSet object does not contain any rows, this method has no effect.
# relative(int rows) - moves the cursor relative to its current position.
# absolute(int n) - positions the cursor on the n-th row of the ResultSet object.
Using all these result set methods i need a sample program all these methods must be used in a single program itself

BalajiEnntech123 wrote:
i think all of u know that there are 8 types of resultset objects are there in jdbc technology i.e I don't know who "u" are but they're wrong if they think there are "8 types of resultset objects are there in jdbc technology".
They'd be especially wrong to think that the methods you mention are "types of resultset objects".

Can i open more than one Resultset object

hi in my program i have to retrive data from three table and the data from three
table i have to use in another one
i wanna know that can we open more than one ResultSet object within one
try{
}catch{] block ( i means ResultSet rs = st.excuteQuery(query) more than one time for different -different tables)
or there is any other way to do this

You can only have one active result set per statement at a time.
Depending on the driver you are using you might be able to have more than one active statement (and result set) on one connection. Or not.
Try catch has nothing to do with that.
If you are nesting result sets then it is likely you should be using a join (SQL) which would then only require one result set.

How to set the fetch size for a ResultSet object?

Connection con = getConnection();
Statement stmt = con.createConnection();
ResultSet res = stmt.executeQuery("select * from table");
//res.setFetchSize(?);
while (res.next)
res.get....
}I do not know the number of rows .
How can I set the fetch size for the ResultSet object?
I try
res.last();
res.setFetchSize(res.getRow()/2);
res.beforeFirst();
while (res.next)
res.get....
}but it's so slow if there are 6000 rows.
How can I set the fetch size for the ResultSet object more effectible?
And what is the best number to set the fetch size?

The fetch size defaults to a standard number. It is unlikely that it will be any faster if you set it unless you only plan to read a small number of rows.
i.e. if you are going to read all the rows, you need to read all the rows no matter what.
Unless the system has set the fetch size to 1 changing it will not be faster.
Depending on the row length, reading in 6000 rows is going to take a long time. You could try using a cpu profiler to improve performance.
Do you really need to read everything in every row?

Deep Cloning of resultset object

Hi, Is it possinble? Deep Cloning of resultset object?
Resltset rs = pstmt.execute()
Anyway to assign rs2 = rs1
Because I am passing my resulset to a legacy application's method, that does a rs.close(). I need to use the same resultset later. JDK 1.4

Write a dynamic proxy to the ResultSet where theclose() method does >nothing.
What if the OP discovers that the app does a rs=null
as well?How can that affect your code? Presumably the ResultSet is passed as an argument to a legacy method so the legacy method might set it's local reference to null it will not affect the reference held by the caller of the method.
The op then runs thru hoops to get permission to
modify a line in legacy code and is too distressed to
post.He does not need to! You need to learn about Java argument passing.
Anyway, thanks for the classrom solution. but i cant
create another class file for extending rs.You have not presented any reason why not! This can be an inner class in the code you are writing and has no influence what so ever on the legacy application.
>
If you are too distressed by the posts here, you are
under no obligation to reply to every one. Anyway , i
found the postI replied because I had a viable solution to a problem you were having. Nothing you have said so far stops it being viable. Look at my posting history - I do not try to reply to everyone.
>
A Resultset is mainly a Java front end for adatabase
cursor (which exists on the database server). When
the ResultSet is closed, the cursor will be closed
too so, even if you could copy everything in the
ResultSet object, the handle for the cursor wouldno
longer be valid.
Which is why you use a Proxy so that you can control exactly what happens.
>>
To truely "deep copy" a resultset the depth would
have to extend accros the database connection to
cloning the cursor.I still don't see why you need to clone the ResultSet rather than use a proxy!
>
very much useful than the self pity expressed by
you.No self pity! I just expressed annoyance at the lack of feedback from you and many others.
No offence, none taken and none dealt.I still find it offensive when people don't bother with a simple acknowledgement. I don't ask many questions myself but when I do I make sure I track the responses and acknowledge those who try to help.
I still think you should re-think your solution but you are free to totally ignore my very simple solution. I expect you will ignore it so the best of luck.

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I am trying to store a DB row (which is containing ~150+ columns) from ResultSet Object to HashMap/Hashtable using the below code. But I wonder is, this not working and even do not get any error.
dataslotHashmap.put(rsmd.getColumnName(i+1),rs.getObject(i+1));
where "rsmd" ResultSetMetaData Object and "rs" is ResultSet Object.
Need advice please

Code snippet for reference:
rs=stmt.executeQuery("select * from ......
rsmd=rs.getMetaData();
rs.next();
int noc=rsmd.getColumnCount();
for(int i=0;i<noc;i+=1) {
dataslotHashmap.put(rsmd.getColumnName(i+1),rs.getObject(i+1));

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I have a Java Bean, in it I have ResultSet Object in a method. Now I want to send this ResultSet Object to the JSP.

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What is rs.getFetchSize() where rs is ResultSet object

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Thanks a lot

you can do this with SQL using COUNT or in the result set through java through some tricks. this question has been asked repeatedly before. i suggest you read some of these...
http://forum.java.sun.com/thread.jsp?forum=48&thread=83958
http://forum.java.sun.com/thread.jsp?forum=48&thread=89968
or browse through the search i just did on count number of rows returned
http://search.java.sun.com/search/java/index.jsp?col=javaforums&qp=%2Bforum%3A48&qt=count+number+of+rows+returned
the getFetchSize and it's complement setFetchSize is way for you to give performance hints to the driver on how much data it should read/hold/cache at one time.
from the API
Gives the JDBC driver a hint as to the number of rows that should be
fetched from the database when more rows are needed for this ResultSet
object.

Oracle Function returns a Ref Cursor to a ResultSet object - Performance

My program calls an Oracle PL/SQL function which returns a ref cursor to a ResultSet object. I know that the function runs to completion relatively quickly when i run it in an anonymous block but when the call is made through my Java application the resultset takes about 30 mins to return. Below is a snippet of my code:
currentConnection = ConnectionManager.getInstance().getConnection();
reportStmt = currentConnection.prepareCall("BEGIN ? := ENVISION.PKG_WMS_TO_AP.F_REPORT_CI_SC_HOLDING(?,?); END;"); reportStmt.registerOutParameter(1, OracleTypes.CURSOR);
reportStmt.setString(2, invoice.getCrewHQ());
reportStmt.setDate(3, invoice.getWrCompletionDate());
reportStmt.execute();
reportRS = ((OracleCallableStatement) reportStmt).getCursor(1);
Through a debugger I see that the second last statement (reportStmt.execute()) runs quickly. It is only when I step into the last statement that the debugger takes up to 30 minutes.
Any thoughts?

Flynn,
The Internet is a dynamic place. After nearly two and a half years, there is a chance that a link will change. This is the new URL for the relevant Web page:
http://asktom.oracle.com/~tkyte/ResultSets/
Good Luck,
Avi.

Send a ResultSet object via RMI - won't work.

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I use the following solution using List. As List is Serlizable I can throw it across the network using RMI... it is also of course easy to access.......
For users objects you need to throw across the network just simply make them implement Serializable
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Resultset SQLResults = statement.executeQuery(SQLQuery);
Vector results = new Vector();
while (SQLResults.next()){
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results.add(SQLResults.getStrinf("COL_NAME");
return results;In your GUI class..
JTable theTable = new JTable();
DefaultTableModel theModel = new DefaultTableModel();
theModel.addColumn(SOME_COLUMN);
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Iterator iterator = List.Iterator();
while(iterator.hasNext()){
iterator.next();
theTableModel.addRow(SOME_OBJECT);
theTable.setModel(theModel);
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Resultset Object

can any one out there please tell me about how to retrive resultset object through RMI as resultset is not serializable? or should i have to do somthing other than RMI. (which actually i don't want to)

You cannot send a ResultSet object through RMI, as you
found out. But don't give up on RMI. Design your own
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Problems setting scrollable ResultSet objects

Hi, I get an "cannot resolve symbol" error when I compile my code:
symbol : method createStatement (int)
location: interface java.sql.Connection
Statement stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE);
^
I'm using j2sdk1.4.1_03, and j2sdkee1.3.1, which should include a fairly updated version of the sql package. Is there something else that I should include in my path variable?
thanks in advance.

There's nothing wrong with your installation or your setup (at least nothing related to this question). There is simply something wrong with your code. There are three versions of the createStatement() method in the Connection interface. There are versions with 0, 2, and 3 parameters. No version with 1 parameter, which is why the compiler can't find the method you coded. Check the API documentation for details.

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