Re: Query composite index range in an efficient way

[Havasvölgyi Ottó <havasvolgyi.otto@xxxxxxxxx>]

Thanks, it's a very good idea!
Otto

2009/2/17 Kevin Grittner <Kevin.Grittner@xxxxxxxxxxxx>

>>> Havasvölgyi Ottó <havasvolgyi.otto@xxxxxxxxx> wrote:

> WHERE (id1>12 or id1=12 and id2>=34)
>   and (id1<56 or id1=56 and id2<=78)

As others have pointed out, if you are using 8.2 or later, you should
write this as:

WHERE (id1, id2) >= (12, 34) and (id1, id2) <= (56, 78)

On earlier versions you might want to try the logically equivalent:

WHERE (id1 >= 12 and (id1 > 12 or id2 >= 34))
 and (id1 <= 56 and (id1 < 56 or id2 <= 78))

-Kevin