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The short answer is that you cannot do this. SQLLDR is not an API; it is not something that is callable. SQLLDR is a command-line program. You can definitely write an external procedure in Java or C that runs SQLLDR, but that won t be the same as calling SQLLDR. The load will happen in another session, and it will not be subject to your transaction control. Additionally, you will have to parse the resulting log file to determine if the load was successful or not, and how successful (i.e., how many rows got loaded before an error terminated the load) it may have been. Invoking SQLLDR from a stored procedure is not something I recommend doing. In the past, before Oracle9i, you might have implemented your own SQLLDR-like process. For example, the options could have been as follows: Write a mini-SQLLDR in PL/SQL. It can use either BFILES to read binary data or UTL_FILE to read text data to parse and load. Write a mini-SQLLDR in Java. This can be a little more sophisticated than a PL/SQL-based loader and can make use of the many available Java routines. Write a SQLLDR in C, and call it as an external procedure.

You can see that this time I accessed the file, I successfully loaded four rows, and the log file was created and, in fact, is owned by Oracle, not by my operating system account.

package banking; import java.security.*; import javax.security.auth.Subject; import javax.security.auth.login.LoginContext; import com.sun.security.auth.callback.TextCallbackHandler; public class Test { public static void main(String[] args) throws Exception { LoginContext lc = new LoginContext("Sample", new TextCallbackHandler()); lc.login(); final Account account1 = new AccountSimpleImpl(1); final Account account2 = new AccountSimpleImpl(2); Subject authenticatedSubject = lc.getSubject(); Subject .doAsPrivileged(authenticatedSubject, new PrivilegedAction() { public Object run() { account1.credit(300); return null; }}, null); try { Subject .doAsPrivileged(authenticatedSubject, new PrivilegedExceptionAction() {

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Fortunately, in Oracle9i and later, we have external tables that provide almost all of the functionality of SQLLDR and, additionally, can do many things SQLLDR cannot. We saw a quick example of external tables in the last chapter on parallelism, when we used them to automate a parallel direct path load. We ll take a longer look at them in a moment. But first, I d like to finish up SQLLDR with some caveats.

In a perfect world, there would be no errors. The data in the input file would be perfect, and it would all load correctly. That almost never happens. So, how can we track errors with this process The most common method is to use the BADFILE option. Here, Oracle will record all records that failed processing. For example, if our control file contained a record with DEPTNO 'ABC', that record would fail and end up in the bad file because 'ABC' cannot be converted into a number. We ll demonstrate this in the following example. First, we add the following as the last line of demo1.ctl (this will add a line of data that cannot be loaded to our input): ABC,XYZ,Hello Next, we run the following command, to prove that the demo1.bad file does not exist yet: ops$tkyte@ORA10G> host ls -l demo1.bad ls: demo1.bad: No such file or directory Then we query the external table to display the contents: ops$tkyte@ORA10G> select * from SYS_SQLLDR_X_EXT_DEPT; DEPTNO ---------10 20 30 40 DNAME -------------Sales Accounting Consulting Finance LOC ------------Virginia Virginia Virginia Virginia

The TRUNCATE option of SQLLDR might appear to work differently than TRUNCATE does in SQL*Plus, or any other tool. SQLLDR, working on the assumption you will be reloading the table with a similar amount of data, uses the extended form of TRUNCATE. Specifically, it issues the following: truncate table t reuse storage The REUSE STORAGE option does not release allocated extents it just marks them as free space. If this were not the desired outcome, you would truncate the table prior to executing SQLLDR.

public Object run() throws Exception { account1.debit(200); return null; }}, null); } catch (PrivilegedActionException ex) { Throwable cause = ex.getCause(); if (cause instanceof InsufficientBalanceException) { throw (InsufficientBalanceException)ex.getCause(); } } try { Subject .doAsPrivileged(authenticatedSubject, new PrivilegedExceptionAction() { public Object run() throws Exception { InterAccountTransferSystem .transfer(account1, account2, 100); return null; }}, null); } catch (PrivilegedActionException ex) { Throwable cause = ex.getCause(); if (cause instanceof InsufficientBalanceException) { throw (InsufficientBalanceException)ex.getCause(); } } try { Subject .doAsPrivileged(authenticatedSubject, new PrivilegedExceptionAction() { public Object run() throws Exception { InterAccountTransferSystem .transfer(account1, account2, 100); return null; }}, null); } catch (PrivilegedActionException ex) { Throwable cause = ex.getCause(); if (cause instanceof InsufficientBalanceException) { throw (InsufficientBalanceException)ex.getCause(); } } } }

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