Re: Poor Performance on Postgres 8.0

Pallav Kalva <pkalva@deg.cc> writes:
>      I  am running this query on postgres 8 beta version and it is not
> using the right index, where as if i run the same query on postgres 7.4
> version it uses the right  index .

1. Beta which, exactly?

2. Have you ANALYZEd both tables lately?

3. If so, try this to see what it thinks the cost of the reverse plan
is:

    begin;
    alter table common.string drop constraint pk_string_stringid;
    explain analyze ... same query ...
    rollback;

            regards, tom lane