Hi, Tom, Tom Lane wrote:
> The only way we could pack stuff without alignment is to go over to the > idea that memory and disk representations are different --- where in > this case the "conversion" might just be a memcpy to a known-aligned > location. The performance costs of that seem pretty daunting, however, > especially when you reflect that simply stepping over a varlena field > would require memcpy'ing its length word to someplace. AFAICS, PostGIS already uses this approach internally, mostly because its current format requires a mix of byte-sized and larger (int, double) fields. Markus -- Markus Schaber | Logical Tracking&Tracing International AG Dipl. Inf. | Software Development GIS Fight against software patents in EU! www.ffii.org www.nosoftwarepatents.org
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