Обсуждение: strange query plans, won't use index

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strange query plans, won't use index

От
Dustin Sallings
Дата:
        Does anybody know where there is a difference here:

photo=> explain select cat from wwwacl where userid=getwwwuser('dustin');
NOTICE:  QUERY PLAN:

Seq Scan on wwwacl  (cost=2.65 size=5 width=4)

EXPLAIN
photo=> explain select cat from wwwacl where userid=6;
NOTICE:  QUERY PLAN:

Index Scan using acl_byid on wwwacl  (cost=2.24 size=5 width=4)

EXPLAIN

        getwwwuser('dustin') returns 6 here.


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