From: simonwhite@dciphercomputing.com
To: pgsql-docs@postgresql.org
Subject: Order of Operations for Update Command
Date: Thu, 25 Aug 2016 15:27:26 +0000
Message-ID: <20160825152726.15674.18873@wrigleys.postgresql.org> (raw)
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The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/9.5/static/sql-update.html
Description:
Does the Update command update the columns in the order they are listed? Can
an updated column's new value be used in the value calculation for a
subsequent column?
i.e. update mytable set qty=qty+5,price=price*1.1,subtotal=qty*price
Will the subtotal be calculated based on the old column values or the new
column values?
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To: pgsql-docs@postgresql.org
Cc: simonwhite@dciphercomputing.com
Subject: Re: Order of Operations for Update Command
In-Reply-To: <20160825152726.15674.18873@wrigleys.postgresql.org>
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