Hi

I think I found a strange bug in JayBird or Firebird.
I open a connection in non-auto-commit mode. I delete all entries in a table
and insert some new entries. That fails (acutally a bug in my software).
However the database should NOT get corrupted, as the transaction is NEVER
commited.
That works as expected.

If I try again, it fails again (as expected).
However, this time the database IS CORRUPTED, as the transaction seems to
get partially commited.

That effect already destroyed 3 databases of mine.
However I could isolate to problem and build a test case, which shows the
behavior.

So, please: Show me what I'm doing wrong and don't disillustrate me that
atomicity is broken in firbird 2.0.0.

Regards,
Steffen



//set SQL DIALECT 3;
//
//set names UTF8;
//
//create database 'c:\test.fdb'
//user 'SYSDBA' password 'xxxxxx'
//page_size 16384
//default character set UTF8;
//
//create table TEST (
// A varchar(10),
// B varchar(10)
//);
//
//insert into TEST (A, B) values ('as', 'as');
//
//commit work;


import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;

import org.firebirdsql.pool.FBWrappingDataSource;


public class TestCase
{

static Map<String,Object> settings = new HashMap<String,Object>();

static FBWrappingDataSource dataSource;


private static void test()
{
Connection connection = null;
PreparedStatement deleteStatement = null;
PreparedStatement insertStatement = null;
try {
connection = dataSource.getConnection();
connection.setAutoCommit( false );
deleteStatement = connection.prepareStatement(
"delete from test" );
deleteStatement.executeUpdate();
insertStatement = connection.prepareStatement(
"insert into test ( a, b ) values ( ?, ? )" );
insertStatement.setString( 1, "test" );
insertStatement.executeUpdate();
connection.commit();
} catch ( SQLException e ) {
e.printStackTrace();
} finally {
try { deleteStatement.close(); } catch ( Throwable t
) {}
try { insertStatement.close(); } catch ( Throwable t
) {}
try { connection.close(); } catch ( Throwable t ) {}
}
}


@SuppressWarnings( "boxing" )
public final static void main( String[] args )
throws Exception
{
if ( args.length == 0 )
args = new String[] { "127.0.0.1:c:/test.fdb",
"sysdba", "xxxxxx" };

dataSource = new FBWrappingDataSource();
dataSource.setCharSet( "utf-8" );
dataSource.setDatabase( args[ 0 ] );
dataSource.setNonStandardProperty( "sql_dialect",
Integer.toString( 3 ) );
dataSource.setEncoding( "utf8" );
dataSource.setMaxPoolSize( 1 );
dataSource.setPassword( args[ 2 ] );
dataSource.setUserName( args[ 1 ] );
try {
test();
} catch ( Exception e ) {
System.out.println( "First try failed." );
}
// uncomment to trigger the problem.
// try {
// test();
// } catch ( Exception e ) {
// System.out.println( "Second try failed." );
// }
// at this point, the table IS EMPTY
dataSource.shutdown();
}

}



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