Bug fixes:
PreparedStatement.setObject didn't handle short's
ResultSet.getDate() now handles null dates (returns null rather
than a NullPointerException)
ResultSetMetaData.getPrecision() now returns 0 for VARCHAR
New features:
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.
1) DatabaseMetaData.getPrimaryKeys() would fail saying that there
is no
table t.
2) PreparedStatement.getObject() was missing some break statements,
which
was causing updates not to work with JBuilder (supplied by Aaron
Dunlop).
jdbc fixes from Peter.
