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pgsql: Add a hook in ExecCheckRTPerms().

Robert Haas <rhaas@postgresql.org>

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From: rhaas@postgresql.org (Robert Haas)
To: pgsql-committers@postgresql.org
Date: 2010-07-09T14:06:01Z
Lists: pgsql-hackers 
Log Message:
-----------
Add a hook in ExecCheckRTPerms().

This hook allows a loadable module to gain control when table permissions
are checked.  It is expected to be used by an eventual SE-PostgreSQL
implementation, but there are other possible applications as well.  A
sample contrib module can be found in the archives at:

http://archives.postgresql.org/pgsql-hackers/2010-05/msg01095.php

Robert Haas and Stephen Frost

Modified Files:
--------------
    pgsql/src/backend/executor:
        execMain.c (r1.349 -> r1.350)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execMain.c?r1=1.349&r2=1.350)
    pgsql/src/include/executor:
        executor.h (r1.168 -> r1.169)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/executor/executor.h?r1=1.168&r2=1.169)