changes

关系型数据库 Postgresql 6.5.2

5/18/1999 - vv
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*	Rewrote libpq++.H
*	Incremented shared library version to 3.0
*	Cleaned up makefiles
*	Made examples use the installed versions of the library and header


4/26/1999 - vv
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*	Changed PrintTuples and DisplayTuples in PgDatabase to use PQprint()



4/14/1999 - vv
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*	Changed connection routines to use PQconnectdb()
*	Connect now returns CONNECTION_OK or CONNECTION_BAD
*	Eliminated pgEnv
*	Changed error handler to return proper messages
*	New function LOid() returns Large Object ID
*	New function Status() returns Large Object Status