Null Exhausted Result set
If a database operation using 8.0.5 JDBC drivers accessing 8.0.5 instance results in the exception: null Exhausted ResultSet, what is really happening?
Any help would be appreciated.
null
Hai,
The packet size is already only 1000. When I clicked F1 on the packet size, the documentation said that if I want to pull a large amount of transaction data, the value can be changed from 1000 to upto 50000 for Oracle. I tried changing it to 50000 and tried pulling data from RSA3. Still it shows the same error.
Regards,
Neha Solanki
Edited by: Neha Solanki on Dec 27, 2007 5:25 AM
Similar Messages
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Eliminating null from result set
Hi,
How can i set some value (say 0) for fields having null value using ejbql?
Anybody please help me....
Thanks in Advance,
Anish.what is the best way to get from a jdbc Result Set to
a Swing Table Model?I think I would iterate over all the elements in my result set and add them to a hashmap / hashtable where the key is their spot in the table, represented by a Point object. One thing I'm not sure of is if 2 points with equal coordinates have the same hash value, but you could always just create your own point class where such is the case and use that.
Result Sets are no random access structures. You have
to navigate through them to reach a certain row.Yes. Not only that, but the resultset is part of your transaction with the DB. It's not good style to keep that open any longer than necessary.
JTable Models want you to implement something like
getValueAt(int i, int j) to access a row (and even a
column) at random.Would be easy using my suggestion above
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Exhausted Result set and End of TNS data channel
Please reply to : [email protected] (there's hopeful :-)
Using the same code, but with different drivers I get :
8.1.7 Thin Driver : End of TNS data channel
8.1.7 OCI Driver : Exhausted Resultset
Both are talking to an 8.1.7 server.
The problems are coming at different points in the code, and seem
to be data/volume based - they are reproducible in the main, but
don't always happen.
I've checked the forums for both of these problems, but nothing
seems to match my approach - just loads of calls to simple
prepared statements generated for an OO/RDB mapping.
Any pointers appreciated - such as why these happen?
Thanks
tim
ThanksHi Liya -
"End of TNS data channel" is usually a message sent by the database when something erroneous is occuring.
What version of the database, JDBC, and JDK are you using?
Are you getting any dump files from the database?
Can you describe a little more about what the application code is doing?
There is some good information on this error message at the following URL
http://forum.java.sun.com/thread.jsp?thread=280338&forum=48&message=1090056
-steve- -
Hello techies,
I am doing simple program, which is connecting to mysql server and retreiving the results from my database using servlets.
I want to do if the result set is returning zero rows i.e if there is no matching rows is available in the table, which i had specified in my query.
Here is my code
String url = "jdbc:odbc:testDSN";
Properties p = new Properties();
p.put("user", "root");
p.put("password", "kkkk");
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
conn = DriverManager.getConnection(url, p);
System.out.println("connection established");
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("select *from test.emp where empNumber =15");
System.out.println("resultset is null" + rs.wasNull());
if (rs.getRow() == 0) {
System.out.println("nomatching subject is found");
out.println("No Matching subject is found");
else {
out.println("<TABLE CELLSPACING=\"0\" CELLPADDING=\"3\" BORDER=\"1\">");
out.println("<TR><TH>eno</TH><TH>ename</TH><TH>date</TH></TR>");
// Loop through results of query.
while (rs.next() == true)
out.println("<TR>");
out.println("<TD>" + rs.getString("eno")+ "</TD>");
out.println("<TD>" + rs.getString("ename") + "</TD>");
out.println("<TD>" + rs.getString("date") + "</TD>");
out.println("</TR>");
Here if there are no employe record matching eno =15 in my table then i want to print no matching record is found.
where i am making mistake??
plz help me .
It is very urgent.
Thanks (inadvance)
regards,
ramuGood Lord, you have database and HTML generation code in the same method?
This is not the way to do JDBC code. Start with a tutorial.
Ever read about object-oriented programming? How 'bout starting with an Employee class that has id, name, and date (what date? birth date? employment date? termination date?) as attributes. Then write a data access object that can do all the database stuff on Employee's behalf, without any consideration for UI. Test that on the command line until you have it working perfectly. THEN worry about how you'll display results to the user.
Your JDBC code isn't right. wasNull() checks to see if the column result is null, not the result set itself. (ResultSet can never be null; read the javadocs). You'd be getting a NullPointerException if ResultSet was null, wouldn't you?
Your code deserves a SERIOUS rewrite, which I'm not inclined to do for you. But I would recommend something more along these lines:
// hardwired url, driver, and query? oh, my - that's bad.
String url = "jdbc:odbc:testDSN";
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
conn = DriverManager.getConnection(url);
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("select * from emp where empNumber =15");
// you're obviously putting this in a servlet - bad idea.
// ever heard of JSPs?
out.println("<TABLE CELLSPACING=\"0\" CELLPADDING=\"3\" BORDER=\"1\">");
out.println("<TR><TH>eno</TH><TH>ename</TH><TH >date</TH></TR>");
// Loop through results of query.
while (rs.next())
out.println("<TR>");
out.println("<TD>" + rs.getString("eno")+ "</TD>");
out.println("<TD>" + rs.getString("ename") + "</TD>");
out.println("<TD>" + rs.getString("date") + "</TD>");
out.println("</TR>");
}% -
I am trying to do a test for a null result set. Basically if the result set returns a value I want to display a table, otherwise I want to display an error message. The following code does not produce the error message. Either the test for null is incorrect, or for some reason I am not getting a null result set even when I don't enter any text into the following text boxes (this is for a login screen, these text boxes come a login screen):
<input type="text" name="username">
<input type="text" name="password">
This is the code for the action page:
<HTML>
<%@page import="java.sql.*"%>
<%
//define connection
Connection con = null;
String user1 = request.getParameter("username");
String pass1 = request.getParameter("password");
String test = "good";
try{
//get the class
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
//get the connection
con = DriverManager.getConnection("jdbc:odbc:errorlog", "admin", "");
//catch your exceptions!
catch(Exception e){
out.println(e.getMessage());
%>
<title>Error Application - Logged Errors</title>
<link href="style/errorstyle.css" rel="stylesheet" type="text/css">
<BODY>
<%
//define resultset and statement
ResultSet rs=null;
Statement stmt=null;
try {
//Using the current database connection create a statement
stmt=con.createStatement();
%>
<%
String sql="SELECT* FROM tblUsers" + " WHERE Username = '"+user1+"' AND Password ='"+pass1+"'";
rs = stmt.executeQuery(sql);
%>
<% //Fetch all the records and print in table
while(rs.next()){
String user2 = rs.getString("FirstName");
String pass2 = rs.getString("LastName");
%>
<table width="100%" border="0" cellspacing="1" cellpadding="6">
<tr >
<td width="67" height="27" bgcolor="#999999"><strong><font size="- 1">First Name</font></strong>
</td>
<td width="89" bgcolor="#999999"><strong><font size="-1">Last
Name</font></strong>
</td>
</tr>
<tr>
<td>
<%out.println(user2);%>
</td>
<td><%out.println(pass2);%></td>
</table>
<%}
if (rs == null)
out.println("Incorrect Username or Password");
//close all your open resultsets, statements, and connection when you are done with them!
rs.close();
stmt.close();
con.close();
//catch all your exceptions
catch (SQLException e) {
out.println(e.getMessage());
%>You simply test the rs.next().
if ( rs.next() )
//spit out the rs row and
//continue processing the resultset 'til empty
else
msg = "invalid username or password
} -
Why to need close the result set and statement
why to need close the result set and statement
It's best to explicitly close every ResultSet, Statement, and Connection in the narrowest scope possible.
These should be closed in a finally block.
Since each close() method throws SQLException, each one should be in an individual try/catch block to ensure that a failure to close one won't ruin the chances for all the others.
You can capture this in one nice utility class, like this:
package db;
import java.sql.*;
import java.util.ArrayList;
import java.util.Map;
import java.util.LinkedHashMap;
import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
* Created by IntelliJ IDEA.
* User: MD87020
* Date: Feb 16, 2005
* Time: 8:42:19 PM
* To change this template use File | Settings | File Templates.
public class DatabaseUtils
* Logger for DatabaseUtils
private static final Log logger = LogFactory.getLog(DatabaseUtils.class);
/** Private default ctor to prevent subclassing and instantiation */
private DatabaseUtils() {}
* Close a connection
* @param connection to close
public static void close(Connection connection)
try
if ((connection != null) && !connection.isClosed())
connection.close();
catch (SQLException e)
logger.error("Could not close connection", e);
* Close a statement
* @param statement to close
public static void close(Statement statement)
try
if (statement != null)
statement.close();
catch (SQLException e)
logger.error("Could not close statement", e);
* Close a result set
* @param rs to close
public static void close(ResultSet rs)
try
if (rs != null)
rs.close();
catch (SQLException e)
logger.error("Could not close result set", e);
* Close both a connection and statement
* @param connection to close
* @param statement to close
public static void close(Connection connection, Statement statement)
close(statement);
close(connection);
* Close a connection, statement, and result set
* @param connection to close
* @param statement to close
* @param rs to close
public static void close(Connection connection,
Statement statement,
ResultSet rs)
close(rs);
close(statement);
close(connection);
* Helper method that maps a ResultSet into a map of columns
* @param rs ResultSet
* @return map of lists, one per column, with column name as the key
* @throws SQLException if the connection fails
public static final Map toMap(ResultSet rs) throws SQLException
List wantedColumnNames = getColumnNames(rs);
return toMap(rs, wantedColumnNames);
* Helper method that maps a ResultSet into a map of column lists
* @param rs ResultSet
* @param wantedColumnNames of columns names to include in the result map
* @return map of lists, one per column, with column name as the key
* @throws SQLException if the connection fails
public static final Map toMap(ResultSet rs, List wantedColumnNames)
throws SQLException
// Set up the map of columns
int numWantedColumns = wantedColumnNames.size();
Map columns = new LinkedHashMap(numWantedColumns);
for (int i = 0; i < numWantedColumns; ++i)
List columnValues = new ArrayList();
columns.put(wantedColumnNames.get(i), columnValues);
while (rs.next())
for (int i = 0; i < numWantedColumns; ++i)
String columnName = (String)wantedColumnNames.get(i);
Object value = rs.getObject(columnName);
List columnValues = (List)columns.get(columnName);
columnValues.add(value);
columns.put(columnName, columnValues);
return columns;
* Helper method that converts a ResultSet into a list of maps, one per row
* @param rs ResultSet
* @return list of maps, one per row, with column name as the key
* @throws SQLException if the connection fails
public static final List toList(ResultSet rs) throws SQLException
List wantedColumnNames = getColumnNames(rs);
return toList(rs, wantedColumnNames);
* Helper method that maps a ResultSet into a list of maps, one per row
* @param rs ResultSet
* @param wantedColumnNames of columns names to include in the result map
* @return list of maps, one per column row, with column names as keys
* @throws SQLException if the connection fails
public static final List toList(ResultSet rs, List wantedColumnNames)
throws SQLException
List rows = new ArrayList();
int numWantedColumns = wantedColumnNames.size();
while (rs.next())
Map row = new LinkedHashMap();
for (int i = 0; i < numWantedColumns; ++i)
String columnName = (String)wantedColumnNames.get(i);
Object value = rs.getObject(columnName);
row.put(columnName, value);
rows.add(row);
return rows;
* Return all column names as a list of strings
* @param rs query result set
* @return list of column name strings
* @throws SQLException if the query fails
public static final List getColumnNames(ResultSet rs) throws SQLException
ResultSetMetaData meta = rs.getMetaData();
int numColumns = meta.getColumnCount();
List columnNames = new ArrayList(numColumns);
for (int i = 1; i <= numColumns; ++i)
columnNames.add(meta.getColumnName(i));
return columnNames;
}Anybody who lets the GC or timeouts or sheer luck handle their resource recovery for them is a hack and gets what they deserve.
Do a search on problems with Oracle cursors being exhausted and learn what the root cause is. That should convince you.
scsi-boy is 100% correct.
% -
SCROLL_SENSITIVE result set can't see the data inserted.
hi all ,
I am trying to display all the latest data available in the table through SCROLL_SENSITIVE and UPDATABLE result set after inserting a new record in the table.
But the result set obtained after executing the query initially is not able to see the newly inserted record in the table and hence same result is getting printed out in both the cases.
Can u explain me what's happening in this case ?? And how can i get the updated record also without executing the statement query twice to get the latest result set.
My full code is given below.
import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
public class Misc3 {
public static void main(String[] args) {
Connection con = null;
Statement stmt = null;
ResultSet rs = null;
try {
int empid;
String lname;
String fname;
int deptno;
int mngrid;
con = JDBCUtil.getOracleConnection();
stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
String query = "select employee_id , last_name , first_name , department_number , manager_id from employees ";
rs = stmt.executeQuery(query);
System.out.println("Before inserting the new record.....");
while (rs.next()) {
empid = rs.getInt(1);
lname = rs.getString(2);
fname = rs.getString(3);
deptno = rs.getInt(4);
mngrid = rs.getInt(5);
System.out.println(empid + "\t" + lname + "\t" + fname + "\t" + deptno + "\t" + mngrid);
System.out.println("Going to insert the new record.....");
rs.moveToInsertRow();
rs.updateInt(1, 10);
rs.updateString(2, "Clark");
rs.updateString(3, "John");
rs.updateInt(4, 2);
rs.updateInt(5, 2);
rs.insertRow();
System.out.println("New record inserted successfully.....");
System.out.println("After inserting the new record.....");
rs.beforeFirst();
while (rs.next()) {
empid = rs.getInt(1);
lname = rs.getString(2);
fname = rs.getString(3);
deptno = rs.getInt(4);
mngrid = rs.getInt(5);
System.out.println(empid + "\t" + lname + "\t" + fname + "\t" + deptno + "\t" + mngrid);
} catch (SQLException ex) {
System.out.println("error code : " + ex.getErrorCode());
System.out.println("error message : " + ex.getMessage());
} finally {
JDBCUtil.cleanUp(con, stmt);
*** JDBCUtil Class ****
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
public class JDBCUtil {
public static Connection getOracleConnection(){
Connection con = null;
try{
// Load the driver
Class.forName("oracle.jdbc.driver.OracleDriver");
//Establish Connection
con = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE","ex","ex");
}catch(Exception ex){
ex.printStackTrace();
return con;
public static void cleanUp (Connection con , Statement stmt){
// Release the resource
try{
if(con != null){
con.close();
if(stmt != null){
stmt.close();
}catch(Exception ex){
ex.printStackTrace();
Edited by: user12848632 on Aug 13, 2012 2:06 PM>
Can u explain me what's happening in this case ?? And how can i get the updated record also without executing the statement query twice to get the latest result set.
>
Sure - but you could have answered your own question if you had read the doc link I gave you in your other thread and next time you post code use \ tags on the lines before and after the code - see the FAQ for info
17076 : Invalid operation for read only resultset
{quote}
•Internal INSERT operations are never visible, regardless of the result set type.
{quote}
See •Seeing Database Changes Made Internally and Externally in the JDBC Dev doc I pointed you to
http://docs.oracle.com/cd/B28359_01/java.111/b31224/resltset.htm#i1024720
Did you notice the words 'never visible'? You won't see them as part of the result set unless you requery. -
How to send email using pl/sql containing the result set as the msg body
Hi.. im using Pl/SQL code to send emails to the users from a dataset that is obtained in a databse table. i have used utl_smtp commands to establish the connection with the smtp mail server. im stuck at the logic when i have to include the message body which is actually the result set of a table.. For instance
IF (p_message = 0) THEN
UTL_SMTP.write_data(l_mail_conn, 'There is no mismatch between the codes' || UTL_TCP.crlf);
ELSE
UTL_SMTP.write_data(l_mail_conn, 'The missing codes are ' || UTL_TCP.crlf);
for s in (select * from temp)
loop
UTL_SMTP.write_data(l_mail_conn, ' ' ||s || UTL_TCP.crlf);
end loop;
END IF;
UTL_SMTP.close_data(l_mail_conn);
UTL_SMTP.quit(l_mail_conn);
END;
***p_message is a prameter passed to this procedure..
Can i obtain the result in the form i have it in my table. which has three columns. I want to display the three columns as it is with teh records. ?this is not related about this forum but you can use below,
CREATE OR REPLACE PROCEDURE SEND_MAIL (subject varchar2,mail_from varchar2, mail_to varchar2,mail_msg varchar2)
IS
mail_host varchar2(30):='XXXXX';
mail_conn utl_smtp.connection;
tz_offset number:=0;
str varchar2(32000);
BEGIN
begin
select to_number(replace(dbtimezone,':00'))/24 into tz_offset from dual;
exception
when others then
null;
end;
mail_conn:=utl_smtp.open_connection(mail_host, 25);
utl_smtp.helo(mail_conn,mail_host);
utl_smtp.mail(mail_conn,'[email protected]');
utl_smtp.rcpt(mail_conn,mail_to);
utl_smtp.open_data(mail_conn);
utl_smtp.write_data(mail_conn,'Date: '||to_char(sysdate-tz_offset,'dd mon yy hh24:mi:ss')||utl_tcp.crlf);
utl_smtp.write_data(mail_conn,'From: '|| mail_from ||utl_tcp.crlf);
utl_smtp.write_data(mail_conn,'To: "'|| mail_to ||'" <'||mail_to||'>'||utl_tcp.crlf);
utl_smtp.write_data(mail_conn,'Subject: '||subject||utl_tcp.crlf);
utl_smtp.write_data(mail_conn,utl_tcp.crlf);
utl_smtp.write_data(mail_conn,replace_turkish_chars(mail_msg)||utl_tcp.crlf);
utl_smtp.write_data(mail_conn,utl_tcp.crlf);
utl_smtp.close_data(mail_conn);
utl_smtp.quit(mail_conn);
END;
Edited by: odilibrary.com on Jun 12, 2012 5:26 PM -
How to add a dummy row in the result set of a SELECT statement.
Hello Everyone -
I have requirment to add a dummy row in the result set of a SELECT statement.
For e.g. lets say there is a table Payment having following colums:
Payment_id number
status varchar2(10)
amount number
payment_date date
so here is the data :-
Payment_id Status Amount payment_date
1 Applied 100 12/07/2008
2 Reversed 200 01/ 06/2009
3 Applied 300 01/ 07/2009
Here is my SQL
Select * form payment where payment_date >= 01/01/2009
Output will be
2 Reversed 200 01/ 06/2009
3 Applied 300 01/ 07/2009
My desired output is below
2 Reversed 200 01/ 06/2009
3 Applied 300 01/ 07/2009
2 Reversed -200 01/ 06/2009 ------(Dummy Row)
Thrid row here is the dummy row which I want to add when status is "Reversed"
I would be very thankful for any kind of help in this regard ...
Thanks,
GauravCartesion joining against a dummy table is a useful method of creating a dummy row:
with my_tab as (select 1 cust_id, 1 Payment_id, 'Applied' Status, 100 Amount, to_date('12/07/2008', 'mm/dd/yyyy') payment_date from dual union all
select 1 cust_id, 2 Payment_id, 'Reversed' Status, 200 Amount, to_date('01/06/2009', 'mm/dd/yyyy') payment_date from dual union all
select 1 cust_id, 3 Payment_id, 'Applied' Status, 300 Amount, to_date('01/06/2009', 'mm/dd/yyyy') payment_date from dual union all
select 2 cust_id, 1 Payment_id, 'Applied' Status, 100 Amount, to_date('12/07/2008', 'mm/dd/yyyy') payment_date from dual union all
select 2 cust_id, 2 Payment_id, 'Reversed' Status, 200 Amount, to_date('01/05/2009', 'mm/dd/yyyy') payment_date from dual union all
select 2 cust_id, 3 Payment_id, 'Applied' Status, 300 Amount, to_date('01/06/2009', 'mm/dd/yyyy') payment_date from dual union all
select 2 cust_id, 4 Payment_id, 'Reversed' Status, -400 Amount, to_date('01/06/2009', 'mm/dd/yyyy') payment_date from dual union all
select 2 cust_id, 5 Payment_id, 'Applied' Status, 500 Amount, to_date('01/07/2009', 'mm/dd/yyyy') payment_date from dual),
--- end of mimicking your table
dummy as (select 'Reversed' col1, 1 rn from dual union all
select 'Reversed' col1, 2 rn from dual)
select mt.cust_id,
mt.payment_id,
mt.status,
decode(dummy.rn, 2, -1*mt.amount, mt.amount) amount,
mt.payment_date
from my_tab mt,
dummy
where mt.status = dummy.col1 (+)
order by mt.cust_id, mt.payment_id, dummy.rn nulls first;
CUST_ID PAYMENT_ID STATUS AMOUNT PAYMENT_DATE
1 1 Applied 100 07/12/2008
1 2 Reversed 200 06/01/2009
1 2 Reversed -200 06/01/2009
1 3 Applied 300 06/01/2009
2 1 Applied 100 07/12/2008
2 2 Reversed 200 05/01/2009
2 2 Reversed -200 05/01/2009
2 3 Applied 300 06/01/2009
2 4 Reversed -400 06/01/2009
2 4 Reversed 400 06/01/2009
2 5 Applied 500 07/01/2009Edited by: Boneist on 07-Jan-2009 23:10
NB. You may have to mess around with the ordering if that's not come back in the order you wanted. You didn't mention what the rules were for any expected ordering though, so I've made up my own *{;-)
Also, I added an identifier (cust_id) to differentiate between different sets of payments, since that's usually the case. Remove that if it's not applicable for your case. -
Reading a string containing special character from a result set
My Code....
PrintStream p = new PrintStream(fout);
if (connection == null)
connection = getConnection();
CallableStatement proc = connection.prepareCall("{call testing_read()}");
rs = proc.executeQuery();
while ( rs.next() )
String page2 = rs.getString(1);
System.out.println(page2);
rs.getString(1); is a string value eg. 'Rebekah \n Govender' that is being set in a stored procedure.
The output of my program is :'Rebekah \n Govender' , i need for it to read the special characters, and produce this output :
Rebekah
Govender
Without using a result set , it works fine.
eg.
String page2 = 'Rebekah \n Govender'
System.out.println(page2);
Will give an output of :
Rebekah
Govender
I need to read values from the results set, pls help me someone....
Please help....String page2 = rs.getString(1).replace("\\n", "\n"); When you include source code in your posts, please enclose it in CODE tags. There's a button for that above the input textarea.
ThE-MaRaC wrote:
Hi,
you can try something like this:
import java.io.UnsupportedEncodingException;;
* Main class, manages the complete game
public class Main {
public static void main(String[] args) {
String page2 = "Rebekah \n Govender";
try {
page2 = new String(page2.getBytes("ISO-8859-1"), "ETF-8");
} catch (UnsupportedEncodingException e) {}
System.out.println(page2);
}Regards,
Hercog MarioThat is a disgusting hack which you shouldn't be recommending to anyone, and it's totally irrelevant here anyway. Also, as written, it does absolutely nothing because you misspelled "UTF-8" and you swallowed the exception that would have told you so. -
Need help in restricting a result set from a UNION in MERGE
Hello,
Would really appreciate if anybody could help me out with the issue I am facing with the below statements (I am new to Oracle ):
merge into table_name_1 p
using
select p_key, value_1, value_2
from some_tables
UNION
select p_key, value_1, value_2
from some_tables
UNION
)t
on (p.p_key = t.p_key)
when matched then
update table_name_1 with value_1 and value_2
when not matched then
insert table_name_1 with p_key, value_1, value_2;
Now, the union of all those selects gives me distinct values and it works most of the times but when I get values like below, the merge fails:
p_key-----value_1-----value_2
100-----25-----50
100-----NULL-----50
I browsed the net and understood the reason behind this: the result set becomes ambiguous and merge doesn't know which row to insert first and which one to update.
Now, my requirement is: I could have any of the below scenario/result sets from the union and I need only 1 row per p_key -
result_set_1
p_key-----value_1-----value_2
100-----25-----50 ***************need this row
100-----NULL-----50
100-----NULL-----NULL
result_set_2
p_key-----value_1-----value_2
100-----25-----NULL ***************need this row
100-----NULL-----NULL
result_set_3
p_key-----value_1-----value_2
100-----25-----NULL ***************need this row (p_key = 100)
100-----NULL-----NULL
200-----NULL-----75 ***************need this row (p_key = 200)
200-----NULL-----NULL
300-----90-----95 ***************need this row (p_key = 300)
So, I basically need a way to restrict the values that I will get from the UNION of all those selects to fit the requirement above, hope I was able to explain the issue I am facing.
Any help would be greatly appreciated.
Thanks,
DpunkIn all cases the goal is to find an order by value that will make the row you want be first.
The query I gave is calculating a priority for each row by adding up values showing whether each column is null or not null. The case statements check whether each column is null and need to be added up to give a total priority value.
Value_1 Value_2 Priority
Not Null Not Null 2 + 1 = 3
Not Null Null 2 + 0 = 2
Null Not Null 0 + 1 = 1
Null Null 0 + 0 = 0
The priority value ends up being a bitmap showing whether each value is null or not null. I think that reflects my mathematics background.
Another way of getting the same result (suggested to me by your asking why it needs the "+") would be to use two CASE expressions as separate order by items:
select p_key, value_1, value_2 from
(select p_key, value_1, value_2, row_number() over
(partition by p_key
order by case when value_1 is null then 0 else 1 end DESC,
case when value_2 is null then 0 else 1 end DESC
) as rn
from (your UNION query here)
where rn = 1
A third way is to use a more complex case statement:
select p_key, value_1, value_2 from
(select p_key, value_1, value_2, row_number() over
(partition by p_key
order by case when value_1 is NOT null and value_2 is NOT null then 1
when value_1 is NOT null and value_2 is null then 2
when value_1 is null and value_2 is NOT null then 3
when value_1 is null and value_2 is null then 4
end ASC
) as rn
from (your UNION query here)
where rn = 1 -
Error while retrieving result set in JTFGRID.
Hi ,
We have developed a custom form where there are various search parameters. Contract Number being one of them. The result set consists of various fields like Contract ID, Contract Number, Contract Number modifier etc. This result is deriving its data from a custom view based on the contract id of the contract selected and populating in the grid.
The issue is the result set is coming only for few contracts and for some it is throwing the below error:
APP-JTF- 210604: Program Error: Please inform your system admin or support representative that:
jtf_grid.populate package reports error :
An unexpected error occurred in jtf_grid.populate
grid :<customgridname>
datasource:<customdatasource>
The following information is available
<null>
The error is most likely in the form or the metadata definition . Please check the following alert for the error code.
The error stack is (first 1000 bytes):
ORA-01722: invalid number
ORA-06512: at "APPS.JTF_GRIDDB" , line 837
ORA-06512: at "APP.JTF_GRIDDB" , line 878
The datatype of the contract id of all the contracts is same. Not sure what the issue is.
Please provide your inputs on the above. If this is not the correct forum for this query then please let me know the correct one.
Thanks a lot,
IshaniBhuvan12 wrote:
suggest me any best practices to create large Excel files.Best practice is to revisit the requirement that suggest an excel file is a solution in the first place. Excel is for humans. Humans don't do well consuming large amounts of data. So either create a machine readable format or create a summerized format for humans. -
Just in time creation of Result Set
I have this problem which is bugging me a lot. Actually I want to display some data on the browser by fetching it from the database. Now this result set could be quite big. So i would like to display on multiple pages like if there are 100 rows then 25 rows per page, so in total 4 pages. One way to do this load all data in memory and then display it moving your cursor down, but in this technique u have to keep large amount of data in memory. I want to fetch these rows as required like first time top 25 rows, next time next 25 rows and so on. I am stuck.. Please help me!!
//you could use a Select bean:
private com.ibm.ivj.db.uibeans.Select getSelectSQL() {
if (ivjSelectSQL == null) {
try {
ivjSelectSQL = new com.ibm.ivj.db.uibeans.Select();
ivjSelectSQL.setReadOnly(true);
ivjSelectSQL.setQuery(new com.ibm.ivj.db.uibeans.Query ivjSelectSQL.setQuery(new com.ibm.ivj.db.uibeans.Query(getMyCon(), sqlGeneral()));
} catch (java.lang.Throwable ivjExc) {
handleException(ivjExc);
return ivjSelectSQL;
ivjScrollPaneTableGen.setModel(getSelectSQL());
ivjScrollPaneTableGen.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
ivjScrollPaneTableGen.setAutoCreateColumnsFromModel(true);
getSelectSQL().execute();
// after this your table will contain automatically all the rows.
how the NextPage should work I haven't done yet, but I saw there is a setViewport(JViewport) function in JScrollPane class which seems to do the thing that you want. -
I'm using JDev 11.1.1.6 and when I type a value into an af:inputListOfValues component and hit either the enter key or the tab key it will replace the value I entered with the first item in the LOV result set. If enter a value and just click out of the af:inputListOfValues component it works correctly. If I use the popup and search for a value it works correctly as well. I have a programmatic view object which contains a single transient attribute (this is the view object which is used to create the list of value component from) and then I have another entity based view object which defines one of its attributes as a list of value attribute. I tried using an entity based view object to create the LOV from and everything works as expected so I'm not sure if this is a bug when using programmatic view objects or if I need more code in the VOImpl. Also, it seems that after the first time of the value being replaced by the first value in the result set that it will work correctly as well. Below are some of the important code snippets.
Also, it looks like it only doesn't work if the text entered in the af:inputListOfValues component would only have a single match returned in the result set. For instance given the result set in the code: Brad, Adam, Aaron, Fred, Charles, Charlie, Jimmy
If we enter Cha, the component works as expected
If we enter A, the component works as expected
If we enter Jimmy, the component does not work as expected and returns the first value of the result set ie. Brad
If we enter Fred, the component does not work as expected and returns the first value of the result set ie. Brad
I also verified that I get the same behavior in JDev 11.1.1.7
UsersVOImpl (Programmatic View Object with 1 transient attribute)
import java.sql.ResultSet;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import oracle.adf.share.logging.ADFLogger;
import oracle.jbo.JboException;
import oracle.jbo.server.ViewObjectImpl;
import oracle.jbo.server.ViewRowImpl;
import oracle.jbo.server.ViewRowSetImpl;
// --- File generated by Oracle ADF Business Components Design Time.
// --- Wed Sep 18 15:59:44 CDT 2013
// --- Custom code may be added to this class.
// --- Warning: Do not modify method signatures of generated methods.
public class UsersVOImpl extends ViewObjectImpl {
private static ADFLogger LOGGER = ADFLogger.createADFLogger(UsersVOImpl.class);
private long hitCount = 0;
* This is the default constructor (do not remove).
public UsersVOImpl () {
* executeQueryForCollection - overridden for custom java data source support.
protected void executeQueryForCollection (Object qc, Object[] params, int noUserParams) {
List<String> usersList = new ArrayList<String>();
usersList.add("Brad");
usersList.add("Adam");
usersList.add("Aaron");
usersList.add("Fred");
usersList.add("Charles");
usersList.add("Charlie");
usersList.add("Jimmy");
Iterator usersIterator = usersList.iterator();
setUserDataForCollection(qc, usersIterator);
hitCount = usersList.size();
super.executeQueryForCollection(qc, params, noUserParams);
} // end executeQueryForCollection
* hasNextForCollection - overridden for custom java data source support.
protected boolean hasNextForCollection (Object qc) {
Iterator usersListIterator = (Iterator)getUserDataForCollection(qc);
if (usersListIterator.hasNext()) {
return true;
} else {
setFetchCompleteForCollection(qc, true);
return false;
} // end if
} // end hasNextForCollection
* createRowFromResultSet - overridden for custom java data source support.
protected ViewRowImpl createRowFromResultSet (Object qc, ResultSet resultSet) {
Iterator usersListIterator = (Iterator)getUserDataForCollection(qc);
String user = (String)usersListIterator.next();
ViewRowImpl viewRowImpl = createNewRowForCollection(qc);
try {
populateAttributeForRow(viewRowImpl, 0, user.toString());
} catch (Exception e) {
LOGGER.severe("Error Initializing Data", e);
throw new JboException(e);
} // end try/catch
return viewRowImpl;
} // end createRowFromResultSet
* getQueryHitCount - overridden for custom java data source support.
public long getQueryHitCount (ViewRowSetImpl viewRowSet) {
return hitCount;
} // end getQueryHitCount
@Override
protected void create () {
getViewDef().setQuery(null);
getViewDef().setSelectClause(null);
setQuery(null);
} // end create
@Override
protected void releaseUserDataForCollection (Object qc, Object rs) {
Iterator usersListIterator = (Iterator)getUserDataForCollection(qc);
usersListIterator = null;
super.releaseUserDataForCollection(qc, rs);
} // end releaseUserDataForCollection
} // end class
<af:inputListOfValues id="userName" popupTitle="Search and Select: #{bindings.UserName.hints.label}" value="#{bindings.UserName.inputValue}"
label="#{bindings.UserName.hints.label}" model="#{bindings.UserName.listOfValuesModel}" required="#{bindings.UserName.hints.mandatory}"
columns="#{bindings.UserName.hints.displayWidth}" shortDesc="#{bindings.UserName.hints.tooltip}" autoSubmit="true"
searchDesc="#{bindings.UserName.hints.tooltip}"
simple="true">
<f:validator binding="#{bindings.UserName.validator}"/>
</af:inputListOfValues>I have found a solution to this issue. It seems that when using a programmatic view object which has a transient attribute as its primary key you need to override more methods in the ViewObjectImpl so that it knows how to locate the row related to the primary key when the view object records aren't in the cache. This is why it would work correctly sometimes but not all the time. Below are the additional methods you need to override. The logic you use in retrieveByKey would be on a view object by view object basis and would be different if you had a primary key which consisted of more than one attribute.
@Override
protected Row[] retrieveByKey (ViewRowSetImpl viewRowSetImpl, Key key, int i) {
return retrieveByKey(viewRowSetImpl, null, key, i, false);
@Override
protected Row[] retrieveByKey (ViewRowSetImpl viewRowSetImpl, String string, Key key, int i, boolean b) {
RowSetIterator usersRowSetIterator = this.createRowSet(null);
Row[] userRows = usersRowSetIterator.getFilteredRows("UserId", key.getAttribute(this.getAttributeIndexOf("UserId")));
usersRowSetIterator.closeRowSetIterator();
return userRows;
@Override
protected Row[] retrieveByKey (ViewRowSetImpl viewRowSetImpl, Key key, int i, boolean b) {
return retrieveByKey(viewRowSetImpl, null, key, i, b); -
JDBC-ODBC Bridge to SPSS data files - Result Set Type is not supported
Hello,
As mentioned in the subject I am trying to read SPSS data files using the SPSS 32-Bit data driver, ODBC and the JDBC-ODBC Bridge.
Using this SPSS Driver I manged to read the data directly into an MS-SQL Server using:
SELECT [...] FROM
OPENROWSET(''MSDASQL.1'',''DRIVER={SPSS 32-BIT Data Driver (*.sav)};DBQ=' SomePathWhereTheFilesAre';SERVER=NotTheServer'', ''SELECT 'SomeSPSSColumn' FROM "'SomeSPSSFileNameWithoutExt'"'') AS a
This works fine!
Using Access and an ODBC System DNS works for IMPORTING but NOT for LINKING.
It is even possible to read the data using the very slow SPSS API.
However, when it comes to JDBC-ODBC the below code does only work in part. The driver is loaded successfully, but when it comes to transferring data into the resultset object the error
SQLState: null
Result Set Type is not supported
Vendor: 0
occurs.
The official answer from SPSS is to use .Net or to use their implementation with Python in their new version 14.0. But this is obviously not an option when you want to use only Java.
Does anybody have experience with SPSS and JDBC-ODBC??? I have tried the possible ResultSet Types, which I took from:
http://publib.boulder.ibm.com/infocenter/db2luw/v8/index.jsp?topic=/com.ibm.db2.udb.doc/ad/rjvdsprp.htm
and none of them worked.
Thank you in advance for your ideas and input & stay happy!
Here the code without all the rest of the class arround it:
// Module: SimpleSelect.java
// Description: Test program for ODBC API interface. This java application
// will connect to a JDBC driver, issue a select statement
// and display all result columns and rows
// Product: JDBC to ODBC Bridge
// Author: Karl Moss
// Date: February, 1996
// Copyright: 1990-1996 INTERSOLV, Inc.
// This software contains confidential and proprietary
// information of INTERSOLV, Inc.
public static void main1() {
String url = "jdbc:odbc:SomeSystemDNS";
String query = "SELECT SomeSPSSColumn FROM 'SomeSPSSFileName'";
try {
// Load the jdbc-odbc bridge driver
Class.forName ("sun.jdbc.odbc.JdbcOdbcDriver");
DriverManager.setLogStream(System.out);
// Attempt to connect to a driver. Each one
// of the registered drivers will be loaded until
// one is found that can process this URL
Connection con = DriverManager.getConnection (url);
// If we were unable to connect, an exception
// would have been thrown. So, if we get here,
// we are successfully connected to the URL
// Check for, and display and warnings generated
// by the connect.
checkForWarning (con.getWarnings ());
// Get the DatabaseMetaData object and display
// some information about the connection
DatabaseMetaData dma = con.getMetaData ();
System.out.println("\nConnected to " + dma.getURL());
System.out.println("Driver " +
dma.getDriverName());
System.out.println("Version " +
dma.getDriverVersion());
System.out.println("");
// Create a Statement object so we can submit
// SQL statements to the driver
Statement stmt = con.createStatement(ResultSet.TYPE_FORWARD_ONLY ,ResultSet.CONCUR_READ_ONLY);
// Submit a query, creating a ResultSet object
ResultSet rs = stmt.executeQuery (query);
// Display all columns and rows from the result set
dispResultSet (rs);
// Close the result set
rs.close();
// Close the statement
stmt.close();
// Close the connection
con.close();
}Thank you for your reply StuDerby!
Actually the above script was before, as you suggested, leaving the ResultSetTeype default. This did not work...
I am getting gray hair with SPSS - in terms of connectivity and "integratebility" none of their solutions offered is sufficient from my point of view.
Variable definitions can only be read by the slow API, data can only be read by Python or Microsoft Products... and if you want to combine both you are in big trouble. I can only assume that this is a company strategy to sell their Dimensions Platform to companies versus having companies developping their applications according to business needs.
Thanks again for any furthur suggestions and I hope, that some SPSS Developper will see this post!
Cheers!!
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