Hi, Nils,
Nis Jorgensen wrote:
> It will probably be quite common for the number to depend on the number
> of rows in other tables. Even if this is fairly constant within one db
> (some assumption), it is likely to be different in others using the same
> function definition. Perhaps a better solution would be to cache the
> result of the estimator function.
Sophisticated estimator functions are free to use the pg_statistics
views for their row count estimation.
HTH,
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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