Sury,
Sorry for the delay: you must have solved this by now.
My "test case" only had two linestrings as you didn't give us any real data to
play with. Looking at your 5 row data result below seems to indicate that your river
covers more than two rows. So, question to you, what is stored in each row? Which rows
have the left data and which the right?
And if there are null geometries then you should do this:
select row_number() over (order by the_geom) as rin, the_geom
from River r
where r.Name = 'Barito'
and r.the_geom is not null;
regards
Simon
On Wed, 14 Oct 2009 20:43:45 +1100, Surya Tarigan <[email protected]>
wrote:
Dear Simon,
the previous SQL ((select row_number() over (order by the_geom) as rin) gave
good result, meanwhile the second SQL ( (select ctid as rin, the_geom) still
return '0' min_width. But I still need to check my river polyline, because
both min and max give exactly the same result, which it should not..
After I run :
select row_number() over (order by the_geom) as rin, the_geom
from River r
where r.Name = 'Barito';
it gave result something like :
rin, the_geom
1; -----(empty)---
2;-----(empty)---
3;010500000000........
4;010500000000.............
5;010500000.........
could it be caused by empty the_geom in rin 1 and 2?
kind regards,
sury
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