LZW algorithm for data compression with partial clearing

hello,
i want to implement zip utility and in that i have to develop LWZ algorithm with partial clearing i.e unshrinking method in JAVA
i am not getting information anout unshrinking on net.
please anyone can help me.

LZW had patent issues, so was replaced. I assume you don't want patent issues.
The new algorithm is already programmed for you via the Inflater and Deflater classes in java.util.zip. Unfortunately the doc is nearly incomprehensible. Fortunately for you several of us have worked together and got it to work. Go to Advanced Language Topics and search for topics on Inflater. I've posted code there that is dead simple to use and would be a good foundation for any zip-like utilities.

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Adobe's instructions are poor and incomplete in that InDesign doesn't step out the records from a data source - it steps out the FRAMES that contain the data field placeholders.
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For a multiple record merge you need one set of placeholders, then set the margins and spacing in the merge options so the positioning is correct.
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Custom InfoObject for date, problem with offset

Hi all,
I have a BEx reports presenting 0CALWEEK and another IO I created for dates.
This IO has the same properties as 0CALWEEK (but it was not created as a reference of 0CALWEEK).
In my report I'd like to use offsets for both IO's.
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Hi Jagadeesh,
did I understand you correctly that:
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2) if I want to use offsets with with Z_* characteristic, I will need ABAP?
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Thanks

Formula variable for date calculations with date-characteristics (2004s)

Hi SDN,
I'd like to calculate the number of days between to date-characteristics. In 3.5, I was used to create 2 formula variables of the type 'replacement path', with 'date' as the dimension indicator. In my formula, I used the 'proces value as date' function for each variable, and I could perform calculations with them.
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If other people experience the same problem, please respond. Then I know it's probably a bug.
Kind regards,
Daniel

Daniel,
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Steps for Data Guard with one primary and 2 standby

Hi,
Database :10.2.0.4, 11.2.0.1
Os: Windows , Unix
A ----------------> Primary database
B ----------------> Standby Database 1
C ----------------> Standby Database 2
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FAL_CLIENT=
STANDBY_FILE_MANAGEMENT=
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Not yet, but now you have me interested.
Please consider Flashback.
I still have to test but here's my take:
PRIMARY SETTINGS
*.FAL_SERVER=STANDBY
*.FAL_CLIENT=PRIMARY
*.STANDBY_FILE_MANAGEMENT=AUTO
*.DB_UNIQUE_NAME=PRIMARY
*.LOG_FILE_NAME_CONVERT='STANDBY','PRIMARY'
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*.log_archive_dest_2='SERVICE=STANDBY LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=STANDBY'
*.log_archive_dest_3='SERVICE=STANDBY2 LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=STANDBY2'
*.LOG_ARCHIVE_DEST_STATE_1=ENABLE
*.LOG_ARCHIVE_DEST_STATE_2=ENABLE
*.LOG_ARCHIVE_DEST_STATE_3=ENABLE
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STANDBY 1 SETTINGS
*.FAL_SERVER=PRIMARY
*.FAL_CLIENT=STANDBY
*.STANDBY_FILE_MANAGEMENT=AUTO
*.DB_UNIQUE_NAME=STANDBY
*.LOG_FILE_NAME_CONVERT='PRIMARY','STANDBY'
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*.log_archive_dest_2='SERVICE=PRIMARY LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=PRIMARY'
*.log_archive_dest_3='SERVICE=STANDBY2 LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=STANDBY2'
*.LOG_ARCHIVE_DEST_STATE_1=ENABLE
*.LOG_ARCHIVE_DEST_STATE_2=DEFER
*.LOG_ARCHIVE_DEST_STATE_3=DEFER
*.LOG_ARCHIVE_MAX_PROCESSES=30
STANDBY2 SETTINGS
*.FAL_SERVER=PRIMARY
*.FAL_CLIENT=STANDBY2
*.STANDBY_FILE_MANAGEMENT=AUTO
*.DB_UNIQUE_NAME=STANDBY2
*.LOG_FILE_NAME_CONVERT='PRIMARY','STANDBY2'
*.log_archive_dest_1=LOCATION=USE_DB_RECOVERY_FILE_DEST VALID_FOR=(ALL_LOGFILES,ALL_ROLES) DB_UNIQUE_NAME=STANDBY2'
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*.log_archive_dest_3='SERVICE=PRIMARY LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES,PRIMARY_ROLE) DB_UNIQUE_NAME=PRIMARY'
*.LOG_ARCHIVE_DEST_STATE_1=ENABLE
*.LOG_ARCHIVE_DEST_STATE_2=DEFER
*.LOG_ARCHIVE_DEST_STATE_3=DEFER
*.LOG_ARCHIVE_MAX_PROCESSES=30
Edited by: mseberg on Nov 29, 2010 9:39 AM
The first test slapped me. Looking at 409013.1 Cascaded Standby Databases
Edited by: mseberg on Nov 29, 2010 12:49 PM

What is QDX for data exchange with SAP

Hi,
Anyone know what is QDX. I was told that it is a Data Exchange Interface (in the higher layer than BAPI). I could not find any relevant information on the Web so far.
Please share with me if you have any information.
Thanks
Andy Tan

Hi,
Anyone know what is QDX. I was told that it is a Data Exchange Interface (in the higher layer than BAPI). I could not find any relevant information on the Web so far.
Please share with me if you have any information.
Thanks
Andy Tan

Which type of index is useful for date columns with time stamp

Hi all,
I am using date column in the where clause of an SQL Query. The values stored in the date column are includes timestamp. The query is very slow and there is no index on the date column.
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Thanks

I am using date column in the where clause of an SQL Query.Dates a re hard queries to tune. This ...
WHERE start_date BETWEEN to_date('01-SEP-05') AND to_date('02-SEP-05')...probably requires a very different execution plan to this...
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Cheers, APC

Inconsistent compression with Deflater/Inflater

I try to (un)compress some data using the (In)Deflater class. I want to have GZIP compression, so I set nowrap to true. The javadoc for the Inflater class says something mysterious like "Note: When using the 'nowrap' option it is also necessary to provide an extra "dummy" byte as input. This is required by the ZLIB native library in order to support certain optimizations." What does that mean?
I have written a test program in which I check if the original data and the uncompressed data is the same. When I run this program I get about 2 errors per run (Inflater not finished).
Any ideas?
import java.util.zip.DataFormatException;
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import java.util.zip.Inflater;
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            System.err.println(exp);
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        for (int i = 0; i < DATA_SIZE; i++)
            if (data[i] != decompData)
nDiffs++;
if (nDiffs > 0)
System.err.println(nDiffs + " diffs");
public static int DATA_SIZE = 16080;
public static int MAX_DATA_SIZE_COMP = (int)(DATA_SIZE * 1.5d);
public static Deflater def = new Deflater(5, true);
public static Inflater inf = new Inflater(true);
public static void main(String[] args)
for (int i = 0; i < 5000; i++)
DATA_SIZE = (int)(Math.random()*(1024*64));
MAX_DATA_SIZE_COMP = (int)(DATA_SIZE * 1.5d)+1024;
testGZIP();
System.out.println("Finished.");

Has nobody an idea why data compressed with Deflater(5,true) cannot always be decompressed by Inflater(true)? What am I doing wrong?
Thanx
Ulrich

Data compression can have negative impact on application ?

Hi,
They are going to analyse table/index structure & go ahead with data compression in order to speed up the performance.
We have been asked to verify if data compression will have affect the application or not?
For ex: we run one process which we run through application which rebuild index of a big table. So I may put this thing in effect.
But could please help me which all areas I should focus and investigate before asking them to proceed for data compression?
-Vaibhav Chaudhari

This article will give you most of the answers:
http://technet.microsoft.com/en-us/library/dd894051(v=sql.100).aspx

About data compression

The lastest version of Berkeley DB supports data compression with its set_bt_compression method.
I created a database, using default data compression method provided by Berkeley DB. Like this:
DB *dbp;
db_create(&dbp, inenv, 0);
dbp->set_flags( dbp, DB_DUPSORT );
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For keys, they are random char arrays,
For data, they are char array with the same content.
Now the problem is: the compressed database file is the same size of the one that i didn't use the compress method.
Can someone tell me why? THX

Hi,
This is likely because the default compression function does not have much to work with.
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Regards,
Andrei

Best Course for Data Warehousing

Hi,
I am planning to join data warehousing course .I heard there is lot courses in data warehousing .
Data warehousing with ETL tools or
Data warehousing with Crystal Reports or
Data warehousing with Business object or
Data warehousing with Informatica or
Data warehousing with Bo-Webel or
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Thanks & Regards,
Raji

Hi,
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Informatica
Data Stage
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Crystal Reports
Cognos
Business object
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Fundamentals of Datawarehouse by PaulRaj Ponnai and
Datawarehouse toolkit.
http://www.inmoncif.com/about.html is one of the best site for Datawarehouse.
With rgds,
Anil Kumar Sharma .P
Assigning points is the way to say thanks in SDN site.

What bean for date selection should I choose?

I need bean for date selection with folowing features:
1) Period selection
2) Internatioanization
I foung some components:
1) http://www.java-calendar.com/
(+) supports all need features
(-) 50$ :(
2) http://www.toedter.com/
(+) free, interationalization
(-) no period selection
3) http://sourceforge.net/projects/jdatechooser
(+) free, supports all need features
(-) project is too young, i'm searching more mature project
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From your own findings it's between 1 and 3, but 3 is "too young" so it looks like 1. Spend the 50.

How to replace blank values in DATE field with 00000000

Hi
I have a DSO with Date field in which there are blank values. I want to replace the blank values in the DSO for date field with 00000000. Because of this blank values in the DSO the report is giving an ORA error.
How do we replace the blank values in the DSO for historical data and also the new loads?
Please advise.
Thank you.
Regards,
Pavan.

Hi Suman,
I'm trying to run a query built on a DSO. The DSO has a field 'Start Date'. This Start Date InfoObject has a reference Char as 0DATE.
This Start Field has blank values due to which I'm getting the ORA-01722 error. I came across many threads with same topic of discussion. As mentioned in one of the Threads I have written a program to update 'Start Date' with 00000000. The code wriiten is "UPDATE /BIC/AZ_MONINV00 SET /BIC/ZSTR_DTE = '00000000' where /BIC/ZSTR_DTE = ' '.
Now when I see the data in the active data table of DSO the blank value is replaced with '00000000'.
But If I right click on the DSO click on display data the 'Start Date' field is blank. And now the Query also gets executed without any error. But in the output of the query the 'Start Date' Field has "#" values.
Can anyone suggest on how to remove these "#" values in the report?

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Item Interest Calculation for partially cleared items

Hi
We need to do interest calculation on Customer Line Items. The T Code we are using is FINT. We have set an interest indicator for Item Interest Calculation, with Interest Calculation based on Items Cleared with Payments. The requirement is that Interest should be calculated on even partially cleared items. Suppose a customer invoice is generated on 1.1.2009 for INR 100000 and becomes due for payment on 30.1.2009. Now on 10.2.2009, a partial payment is recieved against this invoice for INR 30000. System should calculate interest on INR 30000 for 11 days. Now again on 20.2.2009, remaining payment of INR 70000 is recieved. In such a case, interest should be calculated on INR 70000 for 21 days @ 1.25% PM. In the current configuration, when we define that system should calculate interest on Open Items cleared with payments, system calculates interest on INR 100000 for 1.25% for 21 days. Pls suggest.
Regards
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Hi u can check all below steps with specific fields i thought it is working perfectly check it.
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here u can enter int rate type as a "S" Balance interest calculation
2. Prepare Account Balance Interest Calculation
here u can enter int calculation frequency means monthly or quarterly etc. calander type G, select balance plu int check box
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LZW algorithm for data compression with partial clearing

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