Web Oct  7 22:00:00 BST 1998
	- removed syncronised from Connection.ExecSQL(). See next entry.
	- added new syncronised locking in the Connection.ExecSQL() and
	  FastPath.fastpath() methods. They now lock against the PG_Steam
	  object for the connection, which now provides full Thread Safety.
	- Reposted ChangeLog as it's missing from CVS.
	
Modifications done since 6.3.2 was released and Sun Aug 30 11:33:06 BST 1998

	- Fixed PreparedStatement.setObject as it didn't handle shorts
	- ResultSet.getDate() now handles null dates (returns null ratrher
	  than a NullPointerException)
	- ResultSetMetaData.getPrecision() new returns 0 for VARCHAR
	- Field now caches the typename->oid in a Hashtable to speed things
	  up. It removes the need for some unnecessary queries to the backend.
	- PreparedStatement.toString() now returns the SQL statement that it
	  will send to the backend. Before it did nothing.
	- DatabaseMetaData.getTypeInfo() now does something.
	- Connection now throws an exception if either of the user or password
	  properties are missing, as they are required for JDBC to work.
	  This occasionally occurs when the client uses the properties version
	  of getConnection(), and is a common question on the email lists.
	
Sun Aug 30 11:33:06 BST 1998

	- Created ChangeLog file, and entered stuff done since 6.3.2 and today
	- Change version number to 6.4 in Driver.java
	- Added fix to DatabaseMetaData.getTables() submitted by
	  Stefan Andreasen <stefan@linux.kapow.dk>
	- Added fix to DatabaseMetaData.getColumns() to handle patterns
	  submitted by Stefan Andreasen <stefan@linux.kapow.dk>
	- Set TcpNoDelay on the connection, as this gives us a 10x speed
	  improvement on FreeBSD (caused by a bug in their TCP Stack). They
	  should fix the bug before 6.4 is released, but will keep this
	  in here unless it causes more problems.
	  Submitted by Jason Venner <jason@idiom.com>
	- Removed a duplicate definition of fieldCache
	- Added a more meaningful message when the connection is refused. It
	  now says:
		Connection refused. Check that the hostname and port is
		correct, and that the postmaster is running with the -i flag,
		which enables TCP/IP networking.
	- Removed kludge in PreparedStatement.setDate() that acted as a
	  temporary fix to a bug in SimpleDateFormat, as it broke date
	  handling in JDK 1.1.6.
	- Modified PG_Stream and Connection, so that outbound data is now
	  buffered. This should give us a speed improvement, and reduce the
	  ammount of network packets generated.
	- Removed duplicate code and optimised PG_Stream.
	- PG_Stream now returns a more meaningful message when the connection
	  is broken by the backend. It now returns:
		The backend has broken the connection. Possibly the action you
		have attempted has caused it to close.
	- Removed obsolete code from Connection.
	- The error message returned when the authentication scheme is unknown
	  has been extended. It now reads:
		Authentication type ### not supported. Check that you have
		configured the pg_hba.conf file to include the client's IP
		address or Subnet, and is using a supported authentication
		scheme.
	- Connection.getMetaData() now caches the instance returned, so
	  multiple calls will return the same instance.
	- Created a test application that tests the DatabaseMetaData and
	  ResultSetMetaData classes.
	- Replaced getString(#).getBytes() with getBytes(#) which should speed
	  things up, and reduce memory useage.
	- Optimised DatabaseMetaData.getProcedures(), and implemented patterns
	- Fixed NullPointerExceptions thrown when a field is null (Internal
	  to the driver, not caused by results from the backend.
	  DatabaseMetaData.getProcedures() is an example of a method that
	  causes this):
		- ResultSetMetaData.getColumnName() now returns field# where
		  # is the column name.
		- ResultSet.getObject() fixed
		- Fixed bug in psql example that was affected by null fields
		- DatabaseMetaData.getTables()
	- DatabaseMetaData.getPrimaryKeys() ran a query with an ambiguous field
	  fixed.
	- getTypeInfo() optimised to increase speed and reduce memory useage
	- ResultSetMetaData.isCurrency() optimised and is now smaller.
	- Removed unnecessary code fromResultSetMetaData.getCatalogName()
	  and getSchemaName().
	- Created new class postgresql.util.PGmoney to map the money type
	- Created new class postgresql.geometric.PGline to map the line type