The JDBC interface does let you ‘batch’ multiple statments with one execute but this is just hiding the fact that one execute is fired for ecach of them.

From the JDBC docs

“The batch update facility is used with a PreparedStatement to associate multiple sets of input parameter values with a single PreparedStatement object.”

so this

PreparedStatement stmt = con.prepareStatement(
“INSERT INTO employees VALUES (?, ?)”);

stmt.setInt(1, 2000);
stmt.setString(2, “Kelly Kaufmann”);
stmt.addBatch();

stmt.setInt(1, 3000);
stmt.setString(2, “Bill Barnes”);
stmt.addBatch();

// submit the batch for execution
int[] updateCounts = stmt.executeBatch();

will do 1 OCIExecute .

but this

Statement stmt = con.createStatement();
stmt.addBatch(”INSERT INTO employees VALUES (1000, ?,?)”);
stmt.setInt(1, 2000);
stmt.setString(2, “Kelly Kaufmann”);
stmt.addBatch(”INSERT INTO departments VALUES (?, ?’)”);
stmt.setInt(1, 260);
stmt.setString(2, “Shoe”);
stmt.addBatch(”INSERT INTO emp_dept VALUES (?, ?)”);
stmt.setInt(1, 1000);
stmt.setInt(2, 260);

int[] updateCounts = stmt.executeBatch();

will do 3 OCIExecute command one for each SQL. So in this case there are 3 round trips to the server rather than just one for the last example.

‘Though it helps in array binding and helps it is not equivalent to the batching facility in java driver.’

Hi Laks I was curious about this so I had a look under the hood of the JDBC interface and which calls it was using in OCI to accomplish the task.

Well to my surprise both JDBC and DBD::Oracle use almost the exactly the same code under the hood so I think it is a case of ‘We do it this way any you do it the wrong way’:);).

In JDBC you
1) prepare a statement (con.prepareStatement)
2) bind values to the statement (stmt.setString(2, “bla”))
3) add the statement to a batch (stmt.addBatch())
4) repeat 2-3 above and then
5) execute your batch. (stmt.executeBatch())

in DBD:Oracle
1) prepare the statement ($dbh->prepare)
2) bind all the values to the statement ($sth->bind_param_array)
3) execute the statement. ($sth->execute_array)

In both JDBC and DBD::Oracle only 1 round trip call to the execute is made in OCI.

So me thinks it is a case here of ‘You say ‘potato’ and I say ‘potato’.

cheers

As for #2 I think we support is as well check out these links
http://search.cpan.org/~pythian/DBD-Oracle-1.21/Oracle.pm#Returning_A_Recordset
http://search.cpan.org/~pythian/DBD-Oracle-1.21/Oracle.pm#Binding_Cursors

Thanks and regards

Do you have any examples?

thanks and Regards