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Date: Mon, 10 May 93 14:44:39 -0700
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From: amonge@cs.ucsd.edu (Alvaro Monge)
Subject: SQL preprocessor
To: postgres@postgres.berkeley.edu
Sender: pg_adm@postgres.berkeley.edu

I am looking for an SQL pre-processor written in C or C++.
This layer of software should be able to take an SQL command
in ascii/text and put it in an internal structure
representing an operator tree.  That is, a tree where the
internal nodes represent join/cross products/sort, etc the
leaves of the tree are the relations of the database with
some possible selections (i.e. where clauses involving that
relation only.)

Does anyone know where I can find the source code for this
layer of software.  I need it for the research that I am
doing.

Thanks,
Al