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Re: xlog location arithmetic

From: Andrew Dunstan <andrew(at)dunslane(dot)net>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Magnus Hagander <magnus(at)hagander(dot)net>, Euler Taveira de Oliveira <euler(at)timbira(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: xlog location arithmetic
Date: 2011-12-23 15:13:42
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Lists: pgsql-hackers

On 12/23/2011 10:05 AM, Tom Lane wrote:
> Magnus Hagander<magnus(at)hagander(dot)net>  writes:
>>> At this point, my question is: do we want to support the lsn data type idea or
>>> a basic function that implements the difference between LSNs?
>> Personally I think a function is enough - it solves the only case that
>> I've actually seen. But a datatype would be a more complete solution,
>> of course - but it seems a bit of an overkill to me. Not really sure
>> which way we should go - I was hoping somebody else would comment as
>> well..
> I too think a datatype is overkill, if we're only planning on providing
> one function.  Just emit the values as numeric and have done.




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