Weblogic modes

You can start your weblogic server either in Run mode or in Debug mode.

Debug mode will allow you to stop at the debug points and will also help you in getting to the debug variables. So here is how you can change the mode

First of all stop your weblogic server... you cannot change its mode when its on.

2)in the Servers tab... rt click on the weblogic server and select debug from the options.

3)Now start your server and you are good to go :)).. its that easy.. but took a while to understand.. so its worth it post into the blog. haha

for further reference got to:

http://dev2dev.bea.com/pub/a/2006/01/eclipse-plugin.html?page=2

-sonu

Java Compiler in Eclipse

Okay I had an issue with running the Java files again :(

go to : Project --> Properties --> Java Compiler -->set it to 1.4

It was perviously set to 1.5 and I am unable to run my app.

Thanks to Vipul he figured it out for me.

here is the screen shot.

Installing new Plugins in Eclipse(subclipse)

Installing Subclipse from Eclipse:

In you eclipse go to help -->software updates -->find and install

search for new updates --> select remote site --> will prompt you for a name and url to install an application from --> enter both and --> select the name and click finish

subclipse is installed yeppee!!!!

now goto eclipse --> perspective --> svn repository

rt click to create a new repository location

yay thats it you are done installing eclipse svn plug in

For more info goto-->http://subclipse.tigris.org/install.html

--Learn new thing a day yeppe..!!!

Testing Marque

more pics

Explain Plan in Oracle

Easiest way to SQL Tuning

Here is the sample format:

explain plan for your-precious-sql-statement;

select * from table(dbms_xplan.display);

Sample Query:

explain plan for
select * from srgt_guarantee where srgt_facility_grading_id=1882

select * from table(dbms_xplan.display);

Here is the Results:

-------------------------------------------------------------------
| Id | Operation | Name | Rows | Cost |
-------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 2 |
| 1 | SORT AGGREGATE | | 1 | |
| 2 | INDEX FAST FULL SCAN| PK_SRGT_GUARANTEE | 763 | 2 |
-------------------------------------------------------------------

Note
-----
- 'PLAN_TABLE' is old version

You can also create your own plan table in ur schema. Howevery it shud be in the following format:

CREATE TABLE SRGT_PLAN_TABLE (
STATEMENT_ID VARCHAR2(30),
TIMESTAMP DATE,
REMARKS VARCHAR2(80),
OPERATION VARCHAR2(30),
OPTIONS VARCHAR2(30),
OBJECT_NODE VARCHAR2(128),
OBJECT_OWNER VARCHAR2(30),
OBJECT_NAME VARCHAR2(30),
OBJECT_INSTANCE NUMBER(38),
OBJECT_TYPE VARCHAR2(30),
OPTIMIZER VARCHAR2(255),
SEARCH_COLUMNS NUMBER,
ID NUMBER(38),
PARENT_ID NUMBER(38),
POSITION NUMBER(38),
COST NUMBER(38),
CARDINALITY NUMBER(38),
BYTES NUMBER(38),
OTHER_TAG VARCHAR2(255),
PARTITION_START VARCHAR2(255),
PARTITION_STOP VARCHAR2(255),
PARTITION_ID NUMBER(38),
OTHER LONG,
DISTRIBUTION VARCHAR2(30)
);

and you can explain plan the query into the table:

explain plan into SRGT_PLAN_TABLE for (select context_id,EFF_TIMESTAMP from srgt_ref_client_info
where srgt_ref_client_id=(select srgt_ref_client_id from srgt_client_grading_info where
srgt_client_grading_id=(select srgt_client_grading_id from srgt_v_facility_grading_info
where srgt_ref_facility_id=2113)))

SELECT * FROM SRGT_PLAN_TABLE


Deafult way of doing it is:

explain plan FOR (select context_id,EFF_TIMESTAMP from srgt_ref_client_info
where srgt_ref_client_id=(select srgt_ref_client_id from srgt_client_grading_info where
srgt_client_grading_id=(select srgt_client_grading_id from srgt_v_facility_grading_info
where srgt_ref_facility_id=2113)))

select * from table(dbms_xplan.display);

will display the results of the query just executed =)



---------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost |
---------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 14 | 13 |
| 1 | TABLE ACCESS BY INDEX ROWID | SRGT_REF_CLIENT_INFO | 1 | 14 | 2 |
| 2 | INDEX UNIQUE SCAN | PK_SRGT_REF_CLIENT_INFO | 1 | | 1 |
| 3 | TABLE ACCESS BY INDEX ROWID| SRGT_CLIENT_GRADING_INFO | 1 | 8 | 2 |
| 4 | INDEX UNIQUE SCAN | PK_SRGT_CLIENT_GRADING_INFO | 1 | | 1 |
| 5 | NESTED LOOPS OUTER | | 1 | 22 | 9 |
| 6 | NESTED LOOPS OUTER | | 1 | 18 | 9 |
| 7 | TABLE ACCESS FULL | SRGT_FACILITY_GRADING_INFO | 1 | 14 | 9 |
| 8 | INDEX UNIQUE SCAN | PK_SRGT_REF_FACILITY_INFO | 1 | 4 | 0 |
| 9 | INDEX UNIQUE SCAN | PK_SRGT_TEMP_FACILITY_INFO | 1 | 4 | 0 |
---------------------------------------------------------------------------------------------

Note
-----
- 'PLAN_TABLE' is old version


Setting and using a Statement Id in Explain Plan:

explain plan SET STATEMENT_ID = 'srgt context' FOR (select context_id,EFF_TIMESTAMP from srgt_ref_client_info
where srgt_ref_client_id=(select srgt_ref_client_id from srgt_client_grading_info where
srgt_client_grading_id=(select srgt_client_grading_id from srgt_v_facility_grading_info
where srgt_ref_facility_id=2113)))


Form Plan table execute this query to get the values:

SELECT operation, options, object_name, id, parent_id, position, cost, cardinality,
other_tag, optimizer
FROM plan_table
WHERE statement_id = 'srgt context'
ORDER BY id;

More Details see: http://www.csee.umbc.edu/help/oracle8/server.815/a67775/ch13_exp.htm


Now I know abt explain plan in Oracle..!! yay !!

-Sunita

Rownum in Oracle --Something cool..!!!

Here is how you retrieve the first row which meets the crieteria from amoung a set of rows.. =)


select * from srgt_guarantee where srgt_facility_grading_id=1882

will return multiple rows like:
Gid
2408 1882 on 1 50 -1 455 [NULL] YES NO 40
2409 1882 on 23 20 -1 100 [NULL] YES NO 50
2410 1882 [NULL] 24 100 -1 190 [NULL] YES NO 40
2414 1882 [NULL] 1000 100 -1 100 [NULL] YES NO 52
2411 1882 [NULL] 68 100 -1 100 [NULL] YES NO 40
2412 1882 [NULL] 20 100 -1 100 [NULL] YES NO 50
2413 1882 [NULL] 900 100 -1 100 [NULL] NO NO 50

now if you do this will return just a single row =)

select * from srgt_guarantee where srgt_facility_grading_id=1882 and rownum=1;

Will return just a singl row. =)

2408 1882 on 1 50 -1 455 [NULL] YES NO 40


This cool to explore
enjoy
sunita

JDK JRE problem surfaced again

My weblogic is running on a 4.8 version on jdk/jre

and my ant is using 5.11 to compile so my deployment is failing.

So the solution is:

got: C:\bea\weblogic81\server\bin --> open startWLS.cmd

check where your JAVA_HOME is pointing to : its this variable

set JAVA_HOME=C:\bea\jrockit81sp5_142_08

Make everything else in your system point to here..

change ur env variable to point to here C:\bea\jrockit81sp5_142_08

1) my computer--> properties --> advanced-->environment variables-->edit JAVA_HOME

2) In Eclipse window-->preferences-->Ant -->Runtime --> GlobalEntries --> get tools.jar from C:\bea\jrockit81sp5_142_08\jdk\tools.jar

3) In Eclipse window-->preferences-->Java-->BuildPath-->edit JAVA_HOME to point to C:\bea\jrockit81sp5_142_08

4) In Eclipse window-->preferences-->MyEclipse-->ApplicationServers-->Weblogic8-->
JDK -->wls JDK make it point to C:\bea\jrockit81sp5_142_08

5) In Eclipse Project-->Properties-->JavaBuildPath-->Libraries(tab) make your jre point to C:\bea\jrockit81sp5_142_08


Now you are good to go.. all your JAVA_HOME are pointing to one single place =)

--Had fun with Vipul trying to figure this out. =) Finally I learnt a new thing :)

--Suneetha.

DBMS_UTILITY.GET_TIME()

Sample code to test if dbms_utility is working

SELECT name
FROM dba_dependencies
WHERE referenced_name = 'DBMS_UTILITY'
UNION
SELECT referenced_name
FROM dba_dependencies
WHERE name = 'DBMS_UTILITY';

o/p:
ALL_OBJECTS
etc.,

once u successfully execute this w/o exceptions..ur ready to use the dbms_utility.get_time() in the stored procs

dbms_output.put_line('time: ' || ROUND((dbms_utility.get_time() - nStart)/100, 3) || ' s');

Know More: http://thinkoracle.blogspot.com/2006_08_01_archive.html

Cool function..to estimat ur sql times

Ant cannot compile java files

[javac] BUILD FAILED: [build file location here]
Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK

You get this err in Eclipse when trying to compile it with ANT

Its really cool to resolve this issue =)

Go to Window --> Preferences -->Ant-->Runtime-->Global Entries --> Add External Jars

Add the following Jar from your java home,

In my case its C:\Program Files\Java\jdk1.5.0_11\lib\tools.jar

yeppee..!!! and it all worked magically when I hit build again.. cool I love ant..!!!!

To Learn More go to: http://www.dynamicobjects.com/d2r/archives/002591.html


--Sonu

Detectin applications which load on startup in windows xp.
here is the path where you look for..

C:\Documents and Settings\All Users\Start Menu\Programs\Startup
C:\Documents and Settings\{Username}\Start Menu\Programs\Startup

hehe I didnt know this bfr =)

Substr,Length of Str in Oracle

This is the trickest I think I have ever been thru... hmm I kind of hated it as the string in Oracle starts from 1 and not from 0.

here is an example:

l_s_mystring varchar2(20):='suneetha';

l_s_firstString:=substr(l_s_mystring,1,1);

l_s_firstString1:=substr(l_s_mystring,3,1);

l_s_firstString2:=substr(l_s_mystring,5,1);

will print s,n,e etc

here is how it processes

S U N E E T H A
1 2 3 4 5 6 7 8

So when u ask for substr(l_s_mystring,1,1) will print s

when u ask for substr(l_s_mystring,1,3) will print SUN (1 AND 3 INCLUDED)

this sucks and I totally hate it grrrrr!!!!!

So dont forget this from next time onwards :)


Function to get the length of the string. This is soo different than in Java
so had to make a note :)

select length(to_char('suneetha')) from dual;

syntax: length()