[HACKERS] Equivalence Rules

2014-03-02 Thread Ali Piroozi
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


EquivalenceRules.pdf
Description: Adobe PDF document

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[HACKERS] Equivalence Rules

2014-02-28 Thread Ali Piroozi
Hi
Which equivalence rule from those are listed in
email's attachment are implemented in postgresql?
where are them?
Thanks


equivalenceRules.pdf
Description: Adobe PDF document

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Re: [HACKERS] Equivalence Rules

2014-02-28 Thread Ali Piroozi
where means, which function or which part of source code.
I want to use that(function or part of source code), to produce the
equivalence
(based on equivalence rules in attachment) Relational Algebra
for a given SQL query(Relational Algebra).