| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Zeugswetter Andreas SB <ZeugswetterA(at)wien(dot)spardat(dot)at> |
| Cc: | Pete Forman <gsez020(at)kryten(dot)bedford(dot)waii(dot)com>, "'pgsql-hackers(at)postgresql(dot)org'" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: AW: AW: v7.0.3 *pre-release* ... |
| Date: | 2000-11-07 15:37:15 |
| Message-ID: | 6061.973611435@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Zeugswetter Andreas SB <ZeugswetterA(at)wien(dot)spardat(dot)at> writes:
> This looks like a different plan is chosen now. I don't beleive this can be
> platform dependent.
Well, the plan choice *could* be platform-dependent, given that the
planner uses comparisons of floating-point cost estimates. But I agree
that's pretty unlikely. What seems to be more common is platform-
specific differences of behavior of qsort(). If you have any equal
keys in the row set being sorted, then the output ordering depends on
the whim of the qsort implementor...
regards, tom lane
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