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 -- Euler Taveira de Oliveira http://www.timbira.com/ -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
