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From: jli@cs.mtu.edu (Jianfang Li)
Message-Id: <9401130652.AA11275@cs.mtu.edu>
Subject: nest/unnest operations
To: postgres@postgres.Berkeley.EDU
Date: Thu, 13 Jan 1994 01:52:07 -0500 (EST)
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Hi, there, 

I have couple of questions about postgres: 

	. Does postgres implemented nest/unnest operators? 
	. If so, how can I use them for the queries? 
	. What is the storage structure of postgres,i.e. 
	  does it use flat relational tables as the storage structure, 
	  or does it use nested relational tables  as the storage structure? 
	  or something else? 
	. Is there any effort that try to use nested relational structure as
	  the storage structure for implementing object-oriented database? 

Any ides/suggestions will be very welcome and greatly appreciated. 
Thanks. 

		Eve Li 
		jli@cs.mtu.edu