documenting forbidden expressions in column defaults

From: Amit Langote <Langote_Amit_f8(at)lab(dot)ntt(dot)co(dot)jp>
To: Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: documenting forbidden expressions in column defaults
Date: 2018-06-19 08:06:00
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The description of DEFAULT in the documentation currently says:

"The value is any variable-free expression (subqueries and
cross-references to other columns in the current table are not allowed)."

But the value cannot be an aggregate expression, a window function, or a
set-returning function either, so maybe we should list these items too?

Attached is a patch that fixes the text in two places where the above
description appears.


Attachment Content-Type Size
default-expression-forbids-desc-1.patch text/plain 1.8 KB

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