Optimizer bug?? - Mailing list pgsql-hackers

From Ismail Kizir
Subject Optimizer bug??
Date
Msg-id 002901c441ad$9ca01120$0100000a@bilmednot
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Responses Re: Optimizer bug??
Re: Optimizer bug??
List pgsql-hackers

Hi everybody,

1 .... EXPLAIN SELECT COUNT(*) AS c FROM articletbl WHERE
      ((mydate BETWEEN '2004-04-24' AND '2004-05-24' )
)

2 .... EXPLAIN SELECT COUNT(*) AS c FROM articletbl WHERE
      ((mydate = '2004-04-24')
)

(I ran VACUUM ANALYZE before running those)

mydate is an indexed date column.
The optimizer optimizes the second query but, it doesn't optimize the first
one and decides to make a "sequential scan".
Is this a bug?
Or may someone explain me the reason?

Thanks in advance.

Ismail Kizir

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