From: Richard Huxton <dev@archonet.com>
To: Gary Chambers <gwchamb@gmail.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Query Assistance
Date: Wed, 12 Dec 2007 20:21:21 +0000
Message-ID: <476042C1.8070707@archonet.com> (raw)
In-Reply-To: <302670f20712121000w6d3c1ecg39620cfa8c39c606@mail.gmail.com>
References: <302670f20712120858k210dd812l8b232ce98d5d162f@mail.gmail.com>
<20071212123129.ad22c7ce.darcy@druid.net>
<302670f20712121000w6d3c1ecg39620cfa8c39c606@mail.gmail.com>
Gary Chambers wrote:
> D'Arcy...
>
>> Have you considered this?
>
> I considered integrating the begin and end times into the table. I'm
> capturing the data via ACPI events, so it's "transactional" by nature.
> I want to be able to keep track of false transitions (hence the
> is_outage field).
>
> I'm looking for a way to simplify the transitions output on my web
> browser, and I want to combine an offline and a corresponding online
> time into a single line.
How about a "paired_with" field that references the power_transitions
table and a trigger. When you insert a new row, it checks what the
previous row was - if it's a down & this is an up, then set the
paired_with field on each.
--
Richard Huxton
Archonet Ltd
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To: pgsql-sql@postgresql.org
Cc: dev@archonet.com, gwchamb@gmail.com
Subject: Re: Query Assistance
In-Reply-To: <476042C1.8070707@archonet.com>
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