At 04:14 PM 2/17/2004 -0700, scott.marlowe wrote:
>custom type (hex, foobar, etc...) from one to another. What this means
>too you, the user, is that:
>
>create table test (id int8, info text);
><insert 10,000 rows>
>select * from test where id=456;
>
>will result in a sequential scan. Why? Because the default integer type
>is int4, and your id field is int8. Cast the value to int8, and watch it
>use an index scan:
>
>select * From test where id=cast(456 as int8);
Actually won't
select * from test where id='456'
use the index?
I'm curious if this work in all cases - e.g. postgresql figures the best
cast for text to whatever, even for relevant custom types?
