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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