Convert result set into input stream

Hi,
I have result set with me having 93 columns with 1 lac rows. I want to download the result set as xls file.
Because of the data set size is large, i'm not able to hold the data in java object. So i'm trying to convert result set to input stream and giving this input stream to servlet output stream by specifying the contentType as text/xls.
I'm not able to convert result set into input stream.
Could you provide a solution here...
Thanks,
Rajesh

1 - JDBC is the wrong way to extract this data. It's like "What's the fastest way
to copy the Oxford English Dictionary using tweets?" I would research the
DBMS's bulk extract functionality.
2 - Are you dead-set absolutely sure you need to do this at all? What can you
do with the data all in one flat file that you cannot do with SQL access to the
data?
3 - If you want to convert all the columns into one (not that it's a huge
win or anything), you can use the DBMS's conversion and concatenation
functionality in your SQL. So instead of
"select col1, col2, col3, .... from MyBigTable"
do (change this to whatever conversion function syntax and concat syntax your DBMS needs)
"select convert(col1, varchar) concat ' ' concat convert(col2, varchar) concat ' ' concat convert(col3, varchar) ... from MyBigTable"
so the result set you get is a single column.
Joe

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D

1 - JDBC is the wrong way to extract this data. It's like "What's the fastest way
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2 - Are you dead-set absolutely sure you need to do this at all? What can you
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Lookup Function (Report Builder and SSRS)
LookupSet Function (Report Builder and SSRS)
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I have 3 tables:
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A_Name - Varchar2
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FROM       SCRIPT     S
,       SCRIPT_AUTHOR SA
WHERE       SCRIPT.ID = SCRIPT_AUTHOR.ID
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Thanks.Out of interest though (as a theoretical
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Hi,
Actually, I have developed a small piece of code which is working well with the input from the User Console (Via System.in). The console input may be like 10 + 2. Now, I need to pass the input value through my code (Statically) while instantiate. What should i do?
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public static void main( String[] args )
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Venkatesh

Why not simply provide EvalStr2 with an overloaded constructor that takes a String as a parameter?
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[http://catb.org/~esr/faqs/smart-questions.html]
luck, db
edit To post code, use the code tags -- [code]Your Code[/code]will display asYour CodeOr use the code button above the editing area and paste your code between the {code}{code} tags it generates.
Edited by: Darryl.Burke

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suppose there's a table T1(fvalue number),
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It is always helpful to provide the following:
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2. Sample data in the form of CREATE / INSERT statements.
3. Expected output
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How to convert result rows into comma separated values

hi,
Version
BANNER
Oracle Database 11g Enterprise Edition Release 11.1.0.7.0 - 64bit Production
PL/SQL Release 11.1.0.7.0 - Production
CORE     11.1.0.7.0     Production
TNS for Linux: Version 11.1.0.7.0 - Production
NLSRTL Version 11.1.0.7.0 - ProductionQuery
Select distinct prcdr_code from procedure p where P.PRCDR_CTGRY_LKPCD='P' ;
Output
PRCDR_CODE
0001F
0001T
0002F
0002T
0003F
0003T
0004F
0005F
0005T
0006F
0006T
0007F
0007T
0008F
0008T
0009F
0009T
000VA
000VG
Desired Output
0001F,0001T,0002F,0002T .................
My work
i tried this .....
Select distinct wm_concat(prcdr_code) as re from procedure p where P.PRCDR_CTGRY_LKPCD='P' ;
But i got ORA-22813: operand value exceeds system limits error
Please help me ..Thanks,
P Prakash
Edited by: prakash on Jan 4, 2012 9:05 AM

Aggregating CLOB's....
user defined aggregate function can do it...
create or replace type clobagg_type as object
text clob,
static function ODCIAggregateInitialize(sctx in out clobagg_type) return number,
member function ODCIAggregateIterate(self in out clobagg_type, value in clob) return number,
member function ODCIAggregateTerminate(self in clobagg_type, returnvalue out clob, flags in number) return number,
member function ODCIAggregateMerge(self in out clobagg_type, ctx2 in clobagg_type) return number
create or replace type body clobagg_type is
static function ODCIAggregateInitialize(sctx in out clobagg_type) return number is
begin
    sctx := clobagg_type(null) ;
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end;
member function ODCIAggregateIterate(self in out clobagg_type, value in clob) return number is
begin
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begin
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end;
create or replace function clobagg(input clob) return clob
deterministic
parallel_enable
aggregate using clobagg_type;
SQL> select trim(',' from clobagg(ename||',')) as enames from emp;
ENAMES
SMITH,ALLEN,WARD,JONES,MARTIN,BLAKE,CLARK,SCOTT,KING,TURNER,ADAMS,JAMES,FORD,MILLER
SQL> ed
Wrote file afiedt.buf
1 with t as
2    (select 'PFL' c1, 0 c2,110 c3 from dual union all
3     select 'LHL', 0 ,111 from dual union all
4     select 'PHL', 1, 111 from dual union all
5     select 'CHL', 2, 111 from dual union all
6     select 'DHL', 0, 112 from dual union all
7     select 'VHL', 1, 112 from dual union all
8     select 'CPHL', 0, 114 from dual union all
9     select 'WDCL', 1, 114 from dual union all
10     select 'AHL' ,2 ,114 from dual union all
11     select 'NFDL', 3, 114 from dual)
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13 -- end of test data
14 --
15 select trim(clobagg(c1||' ')) as c1, c3
16 from (select * from t order by c3, c2)
17 group by c3
18* order by c3
SQL> /
C1                                     C3
PFL                                   110
LHL CHL PHL                           111
DHL VHL                               112
CPHL AHL NFDL WDCL                    114

JSP Servlet and convert the result set of an SQL Query To XML file

Hi all
I have a problem to export my SQL query is resulty into an XML file I had fixed my servlet and JSP so that i can display all the records into my database and that the goal .Now I want to get the result set into JSP so that i can create an XML file from that result set from the jsp code.
thisis my servlet which will call the jsp page and the jsp just behind it.
//this is the servlet
import java.io.*;
import java.lang.reflect.Array;
import java.sql.*;
import java.util.ArrayList;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.naming.*;
import javax.sql.*;
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*private* *final* *static* Logger +log+ = Logger.+getLogger+(Campaign.*class*.getName());
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*try* {
Context env = (Context) *new* InitialContext().lookup("java:comp/env");
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*throw* *new* ServletException(e);
protected *void *doGet(HttpServletRequest request, HttpServletResponse response)
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// out.println("Le résultat :<br>");
ArrayList <String> Lescomments= *new* ArrayList<String>();
ArrayList <String> Lesidentifiant = *new* ArrayList<String>();
ArrayList <String> Lesnoms = *new* ArrayList <String>();
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request.setAttribute("comments",Lescomments);
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request.setAttribute("id",Lesidentifiant);
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request.setAttribute("nom",Lesnoms);
rs.close();
stmt.close();
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*finally* {
*try* {
*if* (conn != *null*)
conn.close();
*catch* (SQLException e) {
// les paramètres sont corrects - on envoie la page réponse
getServletContext().getRequestDispatcher("/Campaign.jsp").forward(request,response);
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}///this is the jsp page called
<%@ page import="java.util.ArrayList" %>
<%
// on récupère les données
ArrayList nom=(ArrayList)request.getAttribute("nom");
ArrayList id=(ArrayList)request.getAttribute("id");
ArrayList comments=(ArrayList) request.getAttribute("comments");
%>
<html>
<head>
<title></title>
</head>
<body>
Liste des campagnes here i will create the xml file the problem is to display all rows
<hr>
<table>
<tr>
</tr>
<tr>
<td>Comment</td>
<td>
<%
for( int i=0;i<comments.size();i++){
out.print("<li>" + (String) comments.get(i) + "</li>\n");
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%>
</tr>
<tr>
<td>nom</td>
<td>
<%
for( int i=0;i<nom.size();i++){
out.print("<li>" + (String) nom.get(i) + "</li>\n");
}//for
%>
</tr>
<tr>
<td>id</td>
<td>
<%
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out.print("<li>" + (String) id.get(i) + "</li>\n");
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This is how i used to create an XML file in a JSP page only without JSP/SERVLET concept:
<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>
<%
// Identify a carriage return character for each output line
int iLf = 10;
char cLf = (*char*)iLf;
// Create a new empty binary file, which will content XML output
File outputFile = *new* File("C:\\Users\\user\\workspace1\\demo\\WebContent\\YourFileName.xml");
//outputFile.createNewFile();
FileWriter outfile = *new* FileWriter(outputFile);
// the header for XML file
outfile.write("<?xml version='1.0' encoding='ISO-8859-1'?>"+cLf);
try {
// Define connection string and make a connection to database
Connection conn = DriverManager.getConnection("jdbc:derby://localhost:1527/SAMPLE","app","app");
Statement stat = conn.createStatement();
// Create a recordset
ResultSet rset = stat.executeQuery("Select * From posts");
// Expecting at least one record
*if*( !rset.next() ) {
*throw* *new* IllegalArgumentException("No data found for the posts table");
outfile.write("<Table>"+cLf);
// Parse our recordset
// Parse our recordset
*while*(rset.next()) {
outfile.write("<posts>"+cLf);
outfile.write("<postname>" + rset.getString("postname") +"</postname>"+cLf);
outfile.write("<comments>" + rset.getString("comments") +"</comments>"+cLf);
outfile.write("</posts>"+cLf);
outfile.write("</Table>"+cLf);
// Everything must be closed
rset.close();
stat.close();
conn.close();
outfile.close();
catch( Exception er ) {
%>

Please state your problem that you are having more clearly so we can help.
I looked at your code I here are a few things you might consider:
It looks like you are putting freely typed-in comments from end-users into an xml document.
The problem with this is that the user may enter characters in his text that have special meaning
to xml and will have to be escaped correctly. Some of these characters are less than character, greater than character and ampersand character.
You may also have a similiar problem displaying them on your JSP page since there may be special characters that JSP has.
You will have to read up on how to deal with these special characters (I dont remember what the rules are). I seem to recall
if you use CDATA in your xml, you dont have to deal with those characters (I may be wrong).
When you finish writing your code, test it by entering all keyboard characters to make sure they are processed, stored in the database,
and re-displayed correctly.
Also, it looks like you are putting business logic in your JSP page (creating an xml file).
The JSP page is for displaying data ONLY and submitting back to a servlet. Put all your business logic in the servlet. Putting business logic in JSP is considered bad coding and will cause you many hours of headache trying to debug it. Also note: java scriptlets in a JSP page are only run when the JSP page is compiled into a servlet by java. It does not run after its compiled and therefore you cant call java functions after the JSP page is displayed to the client.

Combining result set of two services into one result set

Hi,
I have a model where I am getting one result set (6 Fields) from BI query and another result set (3 Fields which gives real time values) from OLTP system. I want to show the output of these two result sets into single result set (7 Fields). I have a common field in both the result sets as key field.
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Can anyone help me to solve this problem?
Any help is appreciated.
Regards,
Amit

Hi Amit,
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Best Regards, Benni

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Hello, I am querying a database and putting the results into a ResultSets. When the user clicks a button the results are written to an Excel worksheet. However, each time you click the button or write to the worksheet, the ResultSet is appended to the previous one. Is there a way to overwrite??? Thank you in advance.

here is the method I created to insert a result set into MS Excel
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try{
prepared_statement = con.prepareStatement("insert into \"VehicleInfo$\" (BumperNumber, Noun, Section) values (?, ? ?)");
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prepared_statement.setString(3,rset.getString(3));
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The code works; however, it doesn't insert at the beginning of the table. It inserts after the last record. I want to overwrite all data with the insert.

Convert result set into input stream

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