| From: | Ali Piroozi <falipiroozi(at)gmail(dot)com> |
|---|---|
| To: | pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Equivalence Rules |
| Date: | 2014-03-02 08:02:21 |
| Message-ID: | CAMi-Eo1Wrxft=0ZsvKkZRYkoFVGRnbhbjL6a=rUf58xOGuj7DA@mail.gmail.com |
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| Lists: | pgsql-hackers |
Hi
My question is:
Does PostgreSQL implements equivalence rules(from those are listed in
email's attachment)?
Which function or which part of source code(in PostgreSQL ) implements
the equivalence rules?
I think, this should be implemented in query optimization part of
PostgreSQL, but which rule
and where, I don't know?
I want to use that(function or part of source code), to produce the
equivalence Relational Algebras (based on equivalence rules in
attachment) for a given SQL query(Relational Algebra).
Thanks
| Attachment | Content-Type | Size |
|---|---|---|
| EquivalenceRules.pdf | application/pdf | 19.1 KB |
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