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From: Tom Lane <tgl@sss.pgh.pa.us>
To: ZongtianHou <zongtianhou@icloud.com>
cc: pgsql-admin@lists.postgresql.org
Subject: Re: Can I add a column in catalog table as a superuser
In-reply-to: <4285ADA2-B55B-41A5-A09D-678687A799EF@icloud.com>
References: <4285ADA2-B55B-41A5-A09D-678687A799EF@icloud.com>
Comments: In-reply-to ZongtianHou <zongtianhou@icloud.com>
	message dated "Wed, 24 Oct 2018 17:35:42 +0800"
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Date: Wed, 24 Oct 2018 10:43:49 +0100
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ZongtianHou <zongtianhou@icloud.com> writes:
> 	I know this is very dangerous, but I do in my private environment, is t=
here a method to add a column in catalog table, like pg_authid?

Not without patching the source code ...

			regards, tom lane