Hi All,
I encounter problem with the below SQL (it does not turn data from my database):
SELECT l.link_id, l.cat, l.bi_direction, l.frm_coord_id, l.to_coord_id, r.name,
l.start_jtn_elev, l.end_jtn_elev, r.id, r.code, r.prefix FROM Links l,
Links_Index x, Roads r WHERE l.link_id = x.link_id AND x.link_id MATCH
convexquad(?1,?2,?3,?4,?5,?6,?7,?8) AND cat <= 8 AND l.road_id = r.id
However, if I remove condition cat <= 8 the query returns data. Below is the
query:
SELECT l.link_id, l.cat, l.bi_direction, l.frm_coord_id, l.to_coord_id, r.name,
l.start_jtn_elev, l.end_jtn_elev, r.id, r.code, r.prefix FROM Links l,
Links_Index x, Roads r WHERE l.link_id = x.link_id AND x.link_id MATCH
convexquad(?1,?2,?3,?4,?5,?6,?7,?8) AND l.road_id = r.id
In these 2 queries, I implemented the custom R-Tree with function callback
convexquad. I am using SQLITE 3.8.5
Please help me explain this problem if possible.
Thanks
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