Re: need help of getting PK after insertRow in JDBC

Good Afternoon

add the CLOSE_CURSORS_AT_COMMIT Option to the Statements capabilities e.g.
Statement st = db.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE.ResultSet.CLOSE_CURSORS_AT_COMMIT);

//then tell the connection handle to commit the DML to the DB
db.commit();

Martin

Control your own destiny or someone else will -- Jack Welch
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Subject: [GENERAL] need help of getting PK after insertRow in JDBC
Date: Fri, 26 Sep 2008 10:14:01 +0800
From: Dongdong(dot)Chen(at)ge(dot)com
To: pgsql-general(at)postgresql(dot)org; pgsql-jdbc(at)postgresql(dot)org

Hi:
I am a
software engineer from GE. I am using JDBC to operate PostgreSQL8.3 in
Ubuntu8.04. The develop environment is Eclipse3.2 My problem is:

There is a
PostgreSQL table XX containing 5 fields: AA, BB, CC, DD, EE, AA is primary key
and auto-generated type, BB, CC, DD and EE is string type.
I want to
get the value of AA immediately after insert a row into the table. the
code is like this:

Statement st
= db.creatStatement(ResultSet.TYPE_SCROLL_SENSITIVE,
ResultSet.CONCUR_UPDATABLE);
ResultSet
rs=st.executeQuery("SELECT * FROM XX");

rs.moveToInsertRow();

rs.updateString(BB, "b");

rs.updateString(CC, "c");

rs.updateString(DD, "d");

rs.updateString(EE, "e");

rs.insertRow();

rs.moveToCurrentRow();
int index =
rs.getInt("AA");
System.out.println(index);

in the last
sentence I always get 0 no matter how many records I insert. I tried other ways
of moving the cursor including next(), last() and so on, and also
cannot get the correct value. I tried the drivers both
postgresql-8.3-603.jdbc3.jar and
postgresql-8.3-603.jdbc4.jar.

But when I
use pdadminIII to check the table XX, the AA field is already auto-generated
with the correct value.

I found a
way to solve this: close resultset and statement after moveToCurrentRow() and
re-open them, and rs.last(), then run int index=rs.getInt("AA"), I can get the
correct value. I think this method is sort of awkward, anyone knows a
better way and the correct operations?

I am not sure it is proper to
send this mail to this mail list. Sorry if bring you any
inconvenience.
Thanks a
lot!

Best Regards

Kevin
Chen/ChenDongdong
+8613810644051

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