Re: table full scan or index full scan? - Mailing list pgsql-performance

旭斌 裴 escreveu:
> The postgresql database uses the table full scan.but in oracle, the
> similar SQL uses the index full scanning,speed quickly many than
> postgresql.
>
This was discussed many times on the pgsql mailing lists. Search the archives.
Also, take a look at [1].

[1] http://wiki.postgresql.org/wiki/Slow_Counting


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  Euler Taveira de Oliveira
  http://www.timbira.com/