The Ultimate Guide to High Availability with MariaDB

Comments - OQGRAPH Examples

6 years ago Mike Reiche
Re: OQGRAPH Examples

Is it possible to query the previous node for the sequence?

SELECT * FROM oq_graph g
WHERE g.latch='dijkstras' AND g.origid=1;

Actual result:

latch	origid	destid	weight	seq	linkid
dijkstras	1	NULL	4	6	5
dijkstras	1	NULL	3	5	4
dijkstras	1	NULL	2	4	6
dijkstras	1	NULL	2	3	3
dijkstras	1	NULL	1	2	2
dijkstras	1	NULL	0	1	1

Expected result:

latch	origid	destid	weight	seq	linkid	prev
dijkstras	1	NULL	4	6	5	4
dijkstras	1	NULL	3	5	4	3
dijkstras	1	NULL	2	4	6	2
dijkstras	1	NULL	2	3	3	2
dijkstras	1	NULL	1	2	2	1
dijkstras	1	NULL	0	1	1	NULL
 
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