On Sun, Jun 20, 2010 at 5:23 PM, Igor Tandetnik <itandet...@mvps.org> wrote:
> In what way did the statement I gave you, exactly as written, fail to satisfy
> your requirements?
Igor,
When I put in EXACTLY what you gave me:
SELECT FolderId, ImageId, instertedon FROM V_FAVORITES_SELECTED
WHERE case when instertedon > julianday(@time) then findImage(@path,
FolderId, ImageId) else 0 end;
I am getting the EXACT same result, it calls findImage on for EVERY
row in the result set. The goal is to have the findImage()
short-circuit the where clause so that once it returns 1 one time, it
stops. Aka lots of 0's can be returned, but only one 1.
Let me try pseudo coding it differently:
Return the first row from [ SELECT FolderId, ImageId, instertedon FROM
V_FAVORITES_SELECTED WHERE instertedon > julianday(@time) ] where
extension function findImage(@path, FolderId, ImageId) returns 1
If I where to code this in C/C++, I would do something like this:
prepare "SELECT FolderId, ImageId, instertedon FROM
V_FAVORITES_SELECTED WHERE instertedon > julianday(@time)"
do(step) {
if( findImage(@rootPath, FolderId, ImageId) == 1)
break;
}
The goal is to call findImage() just enough to find a result, then stop.
Sam
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