Can getGeneratedKeys() be used when executing batches of statements?

Question

Hi all,
this question was posted in this thread:
Can getGeneratedKeys() be used when executing batches of statements?
but unfortunately I didn't find the answered appropriate.
That thread is now locked, so I would like to start it again here.
This is a summary of the other thread:
Can you retrieve keys generated by a batch of insert statements? The following code produces an ArrayIndexOutOfBoundsException from the Oracle T4CNumberAccessor.unmarshalOneRow() method (see stack trace at the bottom of this message).
The code is:
String sql = "INSERT INTO FOO (ID, NAME) VALUES (FOO_SEQ.NEXTVAL, ?)";
String generatedColumns[] = {"ID"};
PreparedStatement pstmt = connection.prepareStatement(sql, generatedColumns);
pstmt.setString(1, "A");
pstmt.addBatch();
pstmt.setString(1, "B");
pstmt.addBatch();
pstmt.setString(1, "C");
pstmt.addBatch();
//EXCEPTION OCCURS HERE
pstmt.executeBatch();
The exception is:
java.lang.ArrayIndexOutOfBoundsException: 22
at oracle.jdbc.driver.T4CNumberAccessor.unmarshalOneRow(T4CNumberAccessor.java:190)
at oracle.jdbc.driver.T4C8Oall.receive(T4C8Oall.java:610)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:216)
at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:955)
at oracle.jdbc.driver.OraclePreparedStatement.executeBatch(OraclePreparedStatement.java:10580)
The only answer given was:
"You should directly specify how big your batching is. For that reason you may use ExecutionContext where you can set setBatchingLimit(int) and setBatching(bool). This operation will tell execution context the size of supposed batching and also should be batching performed at all or not. You can add batching jobs but you can not execute the jobs without proper initialization of batching job size - it will fail with out of bounds."
ExecutionContext is not something I found in jdbc drivers, so I'm a bit confused about this answer.
Did anyone solve the problem?
Thanks,
Michele

Answer 1

>
We have the same problem. No solution so far.
>
I never found a definitive solution but testing seems to show that this is not possible.
There is no code that can be written to get the generated keys if batching is used.
This is because the 'getGeneratedKeys' method must be called on the prepared statement and would return the generated keys as a ResultSet object. But when batching there is only one prepared statement but multple sets of parameters, one for each batch entry.
Thus there could only be one call to 'getGeneratedKeys' since there is only one prepared statement. This strongly implies that it is not possible to use 'getGeneratedKeys' when batching.
See Retrieval of Auto-Generated Keys in the JDBC Dev guide
http://docs.oracle.com/cd/B19306_01/java.102/b14355/jdbcvers.htm#CHDEGDHJ