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Re: [HACKERS] 64-bit hashjoins

From: Thomas Lockhart <lockhart(at)alumni(dot)caltech(dot)edu>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Erik Riedel <riedel+(at)CMU(dot)EDU>, pgsql-hackers(at)postgreSQL(dot)org
Subject: Re: [HACKERS] 64-bit hashjoins
Date: 1999-03-26 19:12:02
Message-ID: 36FBDC02.F1806269@alumni.caltech.edu (view raw or flat)
Thread:
Lists: pgsql-hackers
> Right now the system is still making an assumption that I consider
> crufty: it uses typalign = 'd' (ie, DOUBLE alignment) for int8 data
> (long long int).  As things stand, this would only cause problems on
> machines where long long actually has stronger alignment requirements
> than double.  I've never heard of such a platform, but maybe they are
> out there --- has anyone heard of one?

No. At least not in our list of supported platforms; don't know what
Cray mainframes require, since machines like that are not necessarily
8-bit-bytes, 4-byte-longword machines.

> Is it worth adding a new typalign value specifically for int8, in 
> order to make the world safe for int8 columns in system tables?

I would be comfortable making the same assumptions about int8 as for
double.

                        - Thomas

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