473,408 Members | 2,477 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,408 software developers and data experts.

clob question.


I have table test (c1 varchar(255) and c2 clob).
Table contains 100 rows . Both columns contains the SAME value (
some short text of 150 bytes).

Now, if I'm fetching both columns to some text files.
db2 select c1 from test >file1.txt
db2 select c2 from test >file2.txt

And? file1.txt has size of some 15Kb(that's ok!)
but file2.txt has size of 1 mb! (there are some extra non-printable
characters). Within application these differences are not visible.
The problem is that it takes very very long to fetch data over slow wan.

database character encoding is set to utf8.

thanks a lot for any hint!
Kaccper.

Nov 12 '05 #1
1 1792
trial and error...
try : db2 select substr(c2, 1, 150) from test >file2.txt. If the
performance improves, then you can consider fetching the lob column
using lob locator. When materializing the lob, you can append the lob
one chunk at a time, using substr.

e.g.

loop (until loblocator.length < end)
lob = lob || substr(loblocator, start, end)
increment start and end
end

Nov 12 '05 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

0
by: freak | last post by:
hi i have problems reading an oracle(9i) clob from a php-script with the MDB-class from pear. the table files has 3 fields: id integer document clob picture clob
1
by: Chris | last post by:
I use websphere connection pooling and had a failure attempting a CLOB.createTemporary. tempClob = CLOB.createTemporary(conn, true, CLOB.DURATION_SESSION); Here's an excerpt of the exception...
1
by: Mat Hess | last post by:
We are currently developing a new application. In this application, we have a table which will hold a large number of rows, where many text fields (one text field per row) will be stored. The users...
1
by: Alias | last post by:
Hi Guys , We have a table(say A) with one clob column . Some data from this table needs to be archived from time to time . My question is if i use : insert into archive_table select * from A...
5
by: gimme_this_gimme_that | last post by:
In Oracle you can have a statement such as insert into foo (foo_id,some_clob) values (100,empty_clob()) where empty_clob() inserts a clob address. What is the approach in DB2 (8.1) to...
3
by: gupta.harika | last post by:
Hi everyone, I am a developer working on php with oracle as backend. I am facing a problem related with the CLOB data. The problem is as follows My application uses a table which contains Clob...
8
by: gimme_this_gimme_that | last post by:
I have the following Java code : package com.rhi.bb.udf.utils; import java.sql.Clob; import java.sql.SQLException; import java.util.regex.Pattern; import java.util.regex.Matcher;
0
by: *Davide* | last post by:
Hello, This query (PHP+Oracle) works: global $user,$pass,$sid; $db_charset = 'UTF8'; $db = OCILogon($user, $pass, $sid, $db_charset); $clob = OCINewDescriptor($db, OCI_D_LOB); $txt_clob =...
0
by: srinivasaraonagisetty | last post by:
hi, I am faceing one problem, while inserting the data in db2 using clob. actually i am writing this type code: public class DBParam { private InputStream inputstream; private static int...
1
by: Veeru71 | last post by:
When I am SELECT'ing a CLOB column from command prompt, the output is getting truncated after a certail limit (8 K ??) How do I get the full data out of a CLOB column? Are there any string...
0
by: Charles Arthur | last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
1
by: nemocccc | last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
0
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However,...
0
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...
0
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...
0
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each...
0
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.