0
		registerColumnType( Types.CHAR, "char(1)" );
		registerColumnType( Types.VARCHAR, "varchar($l)" );
		registerColumnType( Types.FLOAT, "float" );
		registerColumnType( Types.DOUBLE, "double precision" );
		registerColumnType( Types.DATE, "date" );
		registerColumnType( Types.TIME, "time" );
		registerColumnType( Types.TIMESTAMP, "timestamp" );
		//the BLOB type requires a size arguement - this defaults to 
		//bytes - no arg defaults to 1 whole byte! 
		//other argument mods include K - kilobyte, M - megabyte, G - gigabyte. 
		//refer to the PBdevelopers guide for more info. 
		registerColumnType( Types.VARBINARY, "blob($l)" );
		registerColumnType( Types.NUMERIC, "numeric($p,$s)" );
	} 
 
	public String getAddColumnString() {
		return "add"; 
	} 
 
	public boolean dropConstraints() { 
		return false; 
	} 
 
	public String getCascadeConstraintsString() {
		return " cascade"; 
	} 
 
	public String getForUpdateString() {
		return ""; 
	} 
 
	public LockingStrategy getLockingStrategy(Lockable lockable, LockMode lockMode) {
		// Pointbase has no known variation of a "SELECT ... FOR UPDATE" syntax... 
		if ( lockMode==LockMode.PESSIMISTIC_FORCE_INCREMENT) {
			return new PessimisticForceIncrementLockingStrategy( lockable, lockMode);
		} 
		else if ( lockMode==LockMode.PESSIMISTIC_WRITE) {
			return new PessimisticWriteUpdateLockingStrategy( lockable, lockMode);
		} 
		else if ( lockMode==LockMode.PESSIMISTIC_READ) {
			return new PessimisticReadUpdateLockingStrategy( lockable, lockMode);
		} 
		else if ( lockMode==LockMode.OPTIMISTIC) {
			return new OptimisticLockingStrategy( lockable, lockMode);
		} 
		else if ( lockMode==LockMode.OPTIMISTIC_FORCE_INCREMENT) {
			return new OptimisticForceIncrementLockingStrategy( lockable, lockMode);
		} 
		else if ( lockMode.greaterThan( LockMode.READ ) ) {
			return new UpdateLockingStrategy( lockable, lockMode );
		} 
		else { 
			return new SelectLockingStrategy( lockable, lockMode );
		} 
	} 
}