How to handle a large table using a JTable

I want to create a lookup for the customer master file. And there is over 5000 records. so, what is the way to handle this case?
( if adding the all elements to vector or array, i think it is very time consuming and request many memory)
thank you.

Hi, I had similar problem - I had a table with about 100000 records - I was receiving java heap error when I was trying to load it. I have solved the task by loading data by portions - only when they are needed. Make a buffer (eg 200 records) of loaded data. Initially load first 200 records to it. Implements TableModel.getValueAt(row, col) in the way that if the row index is in currently loaded records range, return existing value. If it is out of range, replace data in buffer with data range containing requested value. For example, if row=50, take 50th row from loaded buffer; if row=450, first load records from 400th to 600th to your buffer, than take 50th value from it. Works perferct (table is scrlled with no problems) for 100000 records, mo memory overloading.
The real problem appeared, when I had to sort this table - takes really long time.
p.s. 5000 records is not too much - you can load all of them in one array and have no problems.

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How to create a dynamic table were the JTable columns keep varying based on the input to the jtable

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How to handle a large number of query parameters for a Browse screen

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Wow Josh, thanks. I have a lot of reading to do. What I ultimately plan to do with this (my other posts relate to this too), is have a separate screen for advanced filtering that also allows the user to save their queries if desired.
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How to subdivide 1 large TABLE based on the output of a VIEW

I am searching for a decent method / example code to subdivide a large table (into a global temp table (GTT) for further processing) based on a list of numeric/alphanumeric which is the resultset from a view.
I am groping with the following strategy in PL/SQL:
1 -- set up cursor, execute the view (so I have the list of identifiers)
2 -- create a second cursor (or loop?) which:
accepts each of the identifiers in turn
executes a query (EXECUTE IMMEDIATE?) on the larger table
INSERTs (or appends?) each resultset into the GTT
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The scale of the issue here -- GTT is defined and ready to go, the larger table contains approx 40,000 rows and I need to extract a dozen subsets or so which add up to approx 1000 rows.
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Welcome to the forum!
>
I am searching for a decent method / example code to subdivide a large table (into a global temp table (GTT) for further processing) based on a list of numeric/alphanumeric which is the resultset from a view.
Can anyone point me to code that would "spoon feed" me on this? Or suggest the best / better way to go about it?
The scale of the issue here -- GTT is defined and ready to go, the larger table contains approx 40,000 rows and I need to extract a dozen subsets or so which add up to approx 1000 rows.
>
No - there is no code to point you to.
As many of the previous responses indicate part of the concern is that you seem to have already chosen and partially implemented a solution but the information you provided makes us question whether you have adequately analyzed and defined the actual problem and processing that needs to happen. Here's why I have questions about your approach
1. GTT - a red flag issue - these tables are generally not needed in Oracle. So when you, or anyone says they plan to use one it raises a red flag. People want to be sure you really need one rather than not using a table at all, or just using a regular table instead of a GTT.
2. Double nested CURSOR loops - a DOUBLE red flag issue - this is almost always SLOW-BY-SLOW (row-by-row) processing at its worst. It is seldom needed, doesn't perform well and won't scale. People are going to question this choice and rightfully so.
3. EXECUTE IMMEDIATE - a red flag issue or at least a yellow/warning flag. This is definitely a legitimate methodology when it is needed but may times developers resort to it when it isn't needed because it seems easier than doing the hard work of actually defining ALL of the requirements. It seems easier because it appears that it will allow and work for those 'unexpected' things that seem to come up in new development.
Unfortunately most of those unexpected things come up because the developer did not adequately define all of the requirements. The code may execute when those things arise but it likely won't do the right thing.
Seeing all three of those red flag issues in the same question is like waving a red flag at a charging bull. The responses you get are all likely to be of the 'DO NOT DO THAT' variety.
You are correct that a work table is appropriate when there is business logic to be applied to a set of data that cannot be applied using SQL alone. Use a regular table unless
1. you plan to have multiple sessions working with the table simutaneously,
2. each session needs to work with ONLY their own data in that table and not data from other sessions
3. the data does NOT need to be available after the session ends
4. you actually need a GTT to take advantage of the automatic data preservation (ON COMMIT PRESERVE/DELETE) functionality
Remember - when a session ends the data in the GTT is gone. That can makek it very difficult to troubleshoot data related problems since a different session can't see what data is in the table. Even if a GTT is needed for the final product it is very useful to use a regular table so that the data can be examined after test runs to help find and fix problems. Then after development is complete and initial testing is done a GTT would be substituted and final testing performed.
So the main remaining question is why you need to perform multiple dynamic queries to get the data populated into the work table? Especially why is a nested cursor loop needed? My suspicion is that you have the queries stored in a query table and one of your loops extracts the query and executes it dynamically.
How many queries are we talking about? Do these queries change from run to run? Please provide more detail of the process and an example query for the selection filtering as well as a typical dynamic query you plan to use.

How to effectively manage large table which is rapidly growing

All,
My environment is single node database with regular file system.
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IBM - AIX
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Thanks

To answer your question 2:
2) In one of the article, I read, BLOB is better than "Long RAW" datatype,
how easy is to convert from "Long RAW" datatype. Will BLOB yield better
performance and uses disk space effectively?Yes, LOBs, BLOBs, or CLOBs are (supposed) to be better than raws (or long raws). In addition, I believe Oracle has or will shortly be desupporting the use of long raws in favor of LOBs, CLOBs, or BLOBs (as appropriate).
There is a function called "to_lob" that you have to use to convert. Its a pain because you have to create the second table and then insert into the second table from the first table using the 'to_lob' function.
from my notes...
=================================================
Manually recreate the original table...
Next, recreate (based on describe of the table), except using CLOB instead of LONG:
SQL> create table SPACER_STATEMENTS
2 (OWNER_NAME VARCHAR2(30) NOT NULL,
3 FOLDER VARCHAR2(30) NOT NULL,
4 SCRIPT_ID VARCHAR2(30) NOT NULL,
5 STATEMENT_ID NUMBER(8) NOT NULL,
6 STATEMENT_DESC VARCHAR2(25),
7 STATEMENT_TYPE VARCHAR2(10),
8 SCRIPT_STATEMENT CLOB,
9 ERROR VARCHAR2(1000),
10 NUMBER_OF_ROWS NUMBER,
11 END_DATE DATE
12 )
13 TABLESPACE SYSTEM
14 ;
Table created.
Try to insert the data using select from original table...
SQL> insert into SPACER_STATEMENTS select * from SPACER_STATEMENTS_ORIG;
insert into SPACER_STATEMENTS select * from SPACER_STATEMENTS_ORIG
ERROR at line 1:
ORA-00997: illegal use of LONG datatype
That didn't work...
Now, lets use TO_LOB
SQL> insert into SPACER_STATEMENTS
2 (OWNER_NAME, FOLDER, SCRIPT_ID, STATEMENT_ID, STATEMENT_DESC, STATEMENT_TYPE, SCRIPT_STATEMENT, ERROR, NUMBER_OF_ROWS, END_DATE)
3 select OWNER_NAME, FOLDER, SCRIPT_ID, STATEMENT_ID, STATEMENT_DESC, STATEMENT_TYPE, TO_LOB(SCRIPT_STATEMENT), ERROR, NUMBER_OF_ROWS, END_DATE
4 from SPACER_STATEMENTS_ORIG;
10 rows created.
works well...
===============================================================

How to handle a large number of images?

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I have following trigger and based on the some condition, it should inser a row in to a table using the procedure:
CREATE OR REPLACE TRIGGER RSSC.RR_SERV_ADD_ON_REQ_bu before update on RSSC.RR_SERV_ADD_ON_REQ
for each row
DECLARE
lr_appr_trans_hdr APPR_TRANS_HDR%ROWTYPE;
-- Inserting a row into APPR_TRANS_HDR table
          lr_appr_trans_hdr.apth_ref_system := 'RSAO';
          lr_appr_trans_hdr.apth_xref_col_name := 'RSAO_ADD_ON_REQ_NUM';
          lr_appr_trans_hdr.apth_xref_id := :NEW.RSAO_ADD_ON_REQ_NUM;
          lr_appr_trans_hdr.apth_trans_srce := 'I';
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          lr_appr_trans_hdr.apth_is_finance_adj := 'N';
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               ,lr_appr_trans_hdr.apth_level1_apprvl_dt
               ,lr_appr_trans_hdr.apth_level1_apprvr_id
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               ,lr_appr_trans_hdr.apth_received_dt
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When I use the following instead, I am getting :NEW.APTH_ID must be declared.
SPI_APPR_TRANS_HDR('APPR_TRANS_HDR',to_char(:NEW.APTH_ID),'APTH_ID',:OLD.APTH_ID,:NEW.APTH_ID);
How can use the procedure in a trigger.
Following is the table structure:
Column Name     Data Type     Column Comments
APTH_ID     NUMBER(16) Computed unique identified per large table standards (yyyymmddnnnnnnnn)
APTH_CREATE_DT     DATE     sysdate
APTH_CREATE_USER_ID VARCHAR2(65)     ‘conv’
APTH_UPDATE_DT     DATE     sysdate
APTH_UPDATE_USER_ID     VARCHAR2(65)     ‘conv’
APTH_REF_SYSTEM     VARCHAR2(4)     ‘RSAO’
CPA_PREM_NUM     NUMBER(13,0)     NULL
RSR_REQ_NUM     NUMBER(16)     NULL
RSAO_ADD_ON_REQ_NUM     NUMBER(16)     rsao_add_on_req_num
APTH_TRANS_SRCE     VARCHAR2(2)     ‘I’
APTH_LDC_NAME_CD     VARCHAR2(4)     NULL
APTH_LDC_ACCT_NUM     VARCHAR2(25)     NULL
APTH_LEVEL1_APPROVAL_STAT     VARCHAR2(1)     NULL
APTH_LEVEL1_APPROVAL_DT     DATE     NULL.
APTH_LEVEL1_APPROVAL_ID     VARCHAR2(30)     NULL
APTH_LEVEL2_APPROVAL_STAT     VARCHAR2(1)     NULL
APTH_LEVEL2_APPROVAL_DT     DATE     NULL.
APTH_LEVEL2_APPROVAL_ID     VARCHAR2(30)     NULL
APTH_RECEIVED_DT     DATE     NULL
APTH_BALANCE_AMT     NUMBER(11,2) RR_SERV_ADD_ON_REQ.rsao_tot_amt – amount previously extracted to sap
APTH_CUST_NAME     VARCHAR2(65)     NULL
APTH_SENT_DT     DATE     NULL
APTH_WBS_ELEMENT     VARCHAR2(25)     NULL
APTH_GL_ACCT_NUM     VARCHAR2(15) NULL
APTH_IS_FINANC_ADJ     VARCHAR2(1)     ‘N’
Edited by: user652807 on Sep 3, 2008 4:51 PM

It appears you're missing the format mask in the TO_CHAR, ...
TO_CHAR(:new.apth,'YYYYMMHR24MISS')
The full code would help a bit more.

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I discovered that Pages'08 doesn't permit to put one
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Word let me do this, but unfortunately it does also
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<pre>--------
As long as you'll see students making graphics with pen on paper,
you'll see the missing keystone of the software empire.
dan</pre>

Peggy wrote:
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I finally choosed to work on a temporary document in A3 format,
and keep it open so as to be able to quickly copy my table in the
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During this copy operation I noticed a boring problem:
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Pages decide to shrink it every time, and I can't recover it's
original size (which I penibly tuned up in my A3 document).
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The button:
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is off.
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imported table?
<pre>--------
As long as you'll see students making graphics with pen on paper,
you'll see the missing keystone of the software empire.
dan</pre>

Who know how to handle pl/sql table return from stored procedure calling from jsp

I have some stored procedure which return pl/sql table (index by table), It is look like an array. how jdbc handle this?
CallableStatement cs = con.prepareCall("EXECUTE bill.getcountry(?,?)");
cs.setInt(1, cid);
cs.registerOutParameter(2, java.sql.Types.VARCHAR);// ARRAY?
ResultSet rs = cs.executeQuery();
Array array = (Array) rs.getObject (1);
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Not that familiar with the OCI (Oracle Call Interface), but I think this call will be problematic - the OCI deals with SQL data types and not with PL/SQL structures.
The OCI has since Oracle 8i sported an object call interface (see OCI Runtime Environment for Objects for details).
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How to load data into table Using Script Task

We have a directory/folder where we have a file. We need to insert the File Created Date , File Name , Extension into the database table of Sql server by using Script Task.
So could you please suggest , how to frame the connection string , fetch the file details and insert the data into the database table using Script Task of SSIS 2008

You can achieve it as follows using standard script task
1. Add a ForEachLoop container to point to your directory to iterate though the files. Add a variable of type string inside loop to get file name of each file it iterates. Choose option Filename and extension. Add a variable to just store extension part
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' Add your code here
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End Sub
3. Add a Exec SQL Task after Script task inside loop and give a query like below
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Please Mark This As Answer if it helps to solve the issue Visakh ---------------------------- http://visakhm.blogspot.com/ https://www.facebook.com/VmBlogs

How to handle a large table using a JTable

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