How to know if a query is semantically correct without execute it?

From: Juan Daniel Santana Rodes <jdsantana(at)estudiantes(dot)uci(dot)cu>
To: pgsql-general(at)postgresql(dot)org
Subject: How to know if a query is semantically correct without execute it?
Date: 2013-09-19 00:01:31
Message-ID: b8b24009-72bd-4a93-97e0-9a79aecc74c3@ucimail4.uci.cu
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Hi...
I am programming a procedure in plpgsql language and it must return a boolean response.
The procedure must return TRUE if the query is semantically correct and if not correct, return FALSE.
This must be done without running the query.
Greetings to all, thanks in advance.
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