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-- CopyRight(c) pgRouting developers
-- Creative Commons Attribution-Share Alike 3.0 License : https://creativecommons.org/licenses/by-sa/3.0/
-- TODO move to pgtap
/* -- one edge graph */
SELECT * FROM pgr_lineGraph(
'SELECT id, source, target, cost FROM edges WHERE id = 1'
);
/* -- two edge graphs */
SELECT * FROM pgr_lineGraph($$
SELECT -id AS id, target, source, reverse_cost AS cost FROM edges WHERE id = 1
UNION
SELECT id, source, target, cost FROM edges WHERE id = 1
$$
);
SELECT * FROM pgr_lineGraph($$
SELECT id, target, source, reverse_cost AS cost FROM edges WHERE id = 1
UNION
SELECT -id AS id, source, target, cost FROM edges WHERE id = 1
$$
);
SELECT * FROM pgr_lineGraph(
'SELECT id, source, target, cost, reverse_cost FROM edges WHERE id = 1'
);
SELECT * FROM pgr_lineGraph(
'SELECT id, source, target, cost, reverse_cost FROM edges WHERE id = 17'
);
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