row not updated when used with return values

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i have a sql query

select * from old table (update tbl set col1= 2)

query works fine in command line but when used with jdbc it return the value correctly but does not update the values

here is a code snippet

<pre lang="java">

ResultSet rs = st.executeQuery(sql);

i am doing it the proper way?

2) e.g.
i have a 4 column in table

areaid,ROle,approverNo,username
1,role1,1,aaa
1,role2,1,sss
1,role1,2,fgfg
1,role1,3,tyty
1,role2,2,ghg
1,role1,4,sdss

and soo on now if i add a value 1,role1,(select Count(*) from tbl where areaid=1 and role=role1),dfdf it is working fine , what will be the query when i delete let say "1,role1,3,tyty" will i have to reassign approvernum ,and the query when i will update the role?

Posted 14-Jan-14 20:19pm

agha_ali22

Updated 16-Jan-14 5:52am

v2

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Kush R · Answer 1 · 2014-01-14T21:50:00

Solution 1

Hello,
You can try committing the connection which will make sure that the data is being committed to the database.

You can refer this link http://www.tutorialspoint.com/jdbc/commit-rollback.htm[^]

Posted 14-Jan-14 21:50pm

Kush R

Comments

agha_ali22 15-Jan-14 4:38am

but i am not using it in transition

Kush R · Answer 2 · 2014-01-14T22:50:00

Solution 2

Okay, Refer this link in detail : http://stackoverflow.com/questions/4682871/jdbc-lock-a-row-using-select-for-update-doesnt-work[^]

Posted 14-Jan-14 22:50pm

Kush R

Comments

agha_ali22 15-Jan-14 7:23am

Please if you can give me some example with my scenario.

Christian Graus · Answer 3 · 2014-01-15T12:29:00

Solution 3

Don't ask the same question twice. Edit your question.

"select * from old table (update tbl set col1= 2)"

This is a retarded syntax. As I've told you already, write a stored procedure and do it in two steps. Or just try to execute this:

update tbl set col1= 2 go select * from old table

Is this the real query ? db2 accepts old table as a table name without [] ? The two tables are unrelated ?

Posted 15-Jan-14 12:29pm

Christian Graus

Comments

Jörgen Andersson 16-Jan-14 7:45am

The square brackets [] are MS specific, MySQL uses the backtick "`", while ANSI SQL specifies double quotes "".
But in this case I wouldn't put any significance to the name "old table"

agha_ali22 16-Jan-14 11:34am

as i stated ealier that this query "select * from old table (update tbl set col1= 2) " is working fine in db2 command line ,actually i am working on an ibm product it creates db by itself so i was little bit of hesitant in creating stored procedure , but now i will, please see the updated question i have another problem

Christian Graus · Answer 4 · 2014-01-16T10:31:00

Solution 4

Ask a new question to ask a new question. This is confusing.

"when i delete let say "1,role1,3,tyty" will i have to reassign approvernum ,and the query when i will update the role?"

Foreign keys should stop you from deleting values that are used in other tables. If not, fix your DB. Once that is so, you should NEVER have ids that you need to change based on other changes in your DB.

Posted 16-Jan-14 10:31am

Christian Graus

Comments

agha_ali22 16-Jan-14 16:46pm

Sorry, Actually Approvernum is not used in any table , it is there to tell that this is the 3rd approver of role1(1,role1,3,tyty).

agha_ali22 16-Jan-14 18:38pm

stored procedures are created :) , all i wanted to know for sake of info that why select * from old table (update tbl set col1= 2) is working fine in command line tool that comes with db2, the same query when executed does not work in jdbc

Christian Graus 16-Jan-14 18:47pm

I have no clue. Obviously it has to do with the framework it's running inside.