Re: [EXPLAIN] Nested loops

Reg Me Please <regmeplease@gmail.com> writes:
>  Aggregate  (cost=227.59..227.61 rows=1 width=8)
>    ->  Nested Loop  (cost=0.00..227.34 rows=49 width=8)
>          ->  Seq Scan on T2  (cost=0.00..1.07 rows=6 width=4)
>                Filter: (fld1 = 'VEND'::text)
>          ->  Index Scan using i_T1_partial on T1  (cost=0.00..37.61 rows=8
> width=8)
>                Index Cond: ((T1.prod_id = 42) AND (T1.fk1 = T2.fk1))

If those rowcount estimates are accurate, then this is a perfectly good
plan; in fact probably the best you could hope for.

            regards, tom lane