Обсуждение: returning autogenerated keys

Yes, that is correct, postgres does not support returning auto-generated
keys.

You can get the auto generated keys by calling

SELECT currval('<sequence-name>');

on the same connection. We have remote users and latency is an issue. We
combine the insert and the fetch of the remote keys, which does
everything in a single trip to the database.

sql = "INSERT ....; SELECT currval('<sequence-name>')";
// Prepare the statement
PreparedStatement st = connection.prepareStatement(sql);
// Set the insert values
 ...
// Insert the row
st.execute();
int nInserted = st.getUpdateCount();
if (nInserted == 1 && st.getMoreResults()) {
    ResultSet rs = st.getResultSet();
    if (rs.next())
        result = rs.get(1);
}

That does everything in one go.

Cheers,

Adriaan



Srinivasa_Tata@hud.gov wrote:

>
>
> I am trying to use PostgreSQL and while trying to do a prototype, I am
> getting an error.
>
> org.postgresql.util.PSQLException: Returning autogenerated keys is not
> supported.
> at
> org.postgresql.jdbc3.AbstractJdbc3Statement.executeUpdate(AbstractJdbc3Statement.java:138)
>
> In the TODO list (INSERT section), it is mentioned that  "This is
> useful for returning the auto-generated key for an INSERT. One
> complication is how to handle rules that run as part of the insert."
>
> Does it mean PostgreSQL does not support returning autogenerated keys?
>  I am using 803 version.
>
> Thanks In Advance
>
> Srinivas Tata_
>
> _
>
>