Java JDBC - Multiple prepared statement bulk insert

Question

Using JDBC (Oracle) I need to insert about thousand rows into each of two tables. Something like this:

"INSERT INTO TABLE_A (A_ID, A_NAME, A_LAST_NAME) VALUES (MY_SEQUENCE.NEXTVAL, ?, ?)";
"INSERT INTO TABLE_B (B_ID, B_DESCRIPTION) VALUES (MY_SEQUENCE.CURRVAL, ?)";

The problem is that both tables are connected through common sequence, so that order of statements is important.

It would be quite easy if I had only one table. In that case I used code:

String insert = "Insert into TABLE_A(A_ID, A_NAME, A_LAST_NAME) values(MY_SEQUENCE.NEXTVAL, ?, ?)";
conn.setAutoCommit(false);
PreparedStatement ps = conn.prepareStatement(insert);
for(MyObject obj : myCollection) {
    ps.setString(1, obj.getName());
    ps.setString(2, obj.getLastName());
    ps.addBatch();
}
ps.executeBatch();
conn.commit();
ps.close();

But this approach can work only with one prepared statment and thus with only one Insert. How can I provide a solution for this problem?

Answer 1

You can try

PreparedStatement ps = conn.prepareStatement(insert, Statement.RETURN_GENERATED_KEYS);
...
ps.executeBatch();

then

ResultSet rs = ps.getGeneratedKeys();
ps = conn.prepareStatement("INSERT INTO TABLE_B (B_ID, B_DESCRIPTION) VALUES (?, ?)");

for ( int counter =0;rs.next(); counter++ ) { 
  ps.setInt(1,rs.getInt(0));
  ps.setString(2, myCollection.get(counter).getDescription());
  ps.addBatch();
}
...

Answer 2

If I understand your problem correctly, you have a problem with NEXTVAL and CURRVAL since CURRVAL might change due to other DB use? If so, you can change your code to this order:

currentNextVal = select NEXTVAL
INSERT into table_a with currentNextVal as the id
INSERT into table_b with the same currentNextVal 

Did I understand your problem correctly?