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Re: Why ACL_EXECUTE is checked on FindConversion()?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: KaiGai Kohei <kaigai(at)ak(dot)jp(dot)nec(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Why ACL_EXECUTE is checked on FindConversion()?
Date: 2009-08-19 18:27:53
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Lists: pgsql-hackers
KaiGai Kohei <kaigai(at)ak(dot)jp(dot)nec(dot)com> writes:
> When FindConversion() is called, it also checks current user's ACL_EXECUTE
> privilege on the conproc of the fetched conversion.

> Why this check is applied on FindConversion(), instead of FindDefaultConversion()?

Does seem pretty inconsistent, doesn't it?

The original idea may have been to provide a substitute for a USAGE
ACL check on conversions, in which case it's not totally insane: if
you make a conversion default then you're implicitly granting it to
public.  But there's no documentation about this.

Offhand I see no really good reason to have a usage check on
conversions, and would be happy with removing this one.  The function
permission check at CREATE CONVERSION time ought to be sufficient.

			regards, tom lane

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