executing an update sql takes too long , what is problem ?

[raminaa niilian]

Hi
Thank you for reading my post
My problem is :
Im trying to execute an update statement over a table in Derby database.
when i call executeUpdate()
it goes away and die (no exception , no data update happens)
I tried and used same query string (changed to fit the insert operation)
to insert data into database and it inserted successfylly.

I used Datasource , and PreparedStatement for updating , am i correct ?

 
String uStr= "update EMPLOYEE set EMPNO=? ,FIRSTNME=?,MIDINIT=? where EMPNO=?";
PreparedStatement prepStatement = conn.prepareStatement(uStr);
pstmt.setString(1,"12125");

and other parameter are set as the above.

when i execute the statement with executeUpdate() it dies

is there any method that i can see what is the sql string that the prepared statement is executing ?

thank you

[Jeanne Boyarsky]

Raminaa,
It is possible that some other process has a lock on the row you are trying to update. You are correct in using DataSource and PreparedStatement.

In your example, you only show the setting of one parmeter. In you real code, I assume you set all 4. Otherwise, the code would throw an exception. Also note that it is unnecessary to set EMPNO in the update query since that is what you are searching on and it isn't changing.

For testing, you could just write the query without any "?" so you know what is being executed. Or you could use a DebuggableStatement (search this forum for details.) I think that may be overkill here though.

[Yilmaz Mete]

My experience:

i)

Try first to execute the statement from outside of Java.
Say, Oracle as database use TOAD etc. and try there first.
or with MySQL try the statement on the QUery-Browser.. 

ii) Are there any
Indexes or such constraints on the table to be updated?

bye.
Yilmaz