src/ports/postgres/modules/graph/test/sssp.sql_in

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DROP TABLE IF EXISTS vertex,"EDGE",out,out_summary,out_path,
	vertex_alt,edge_alt,out_alt,out_alot_summary,
	edge_gr,out_gr,out_gr_summary,out_gr_path,
	edge_gr2, out_gr2, out_gr2_summary,
	"edge_Q", "out_Q", "out_Q_summary", "out_Q_path";

CREATE TABLE vertex(
                  id INTEGER
                );

CREATE TABLE "EDGE"(
                  src INTEGER,
                  dest INTEGER,
                  weight DOUBLE PRECISION
                );

INSERT INTO vertex VALUES
(0),
(1),
(2),
(3),
(4),
(5),
(6),
(7)
;
INSERT INTO "EDGE" VALUES
(0, 1, 1),
(0, 2, 1),
(0, 4, 10),
(1, 2, 2),
(1, 3, 10),
(2, 3, 1),
(2, 5, 1),
(2, 6, 3),
(3, 0, 1),
(4, 0, -2),
(5, 6, 1),
(6, 7, 1)
;

SELECT graph_sssp('vertex',NULL,'"EDGE"',NULL,0,'out');

SELECT * FROM out;

SELECT assert(weight = 3, 'Wrong output in graph (SSSP)')
	FROM out WHERE id = 6;
SELECT assert(parent = 5, 'Wrong parent in graph (SSSP)')
	FROM out WHERE id = 6;

SELECT graph_sssp_get_path('out',6,'out_path');

CREATE TABLE vertex_alt AS SELECT id AS v_id
	FROM vertex;
CREATE TABLE edge_alt AS SELECT src AS e_src, dest, weight AS e_weight
	FROM "EDGE";

SELECT graph_sssp('vertex_alt','v_id','edge_alt','src=e_src, weight=e_weight'
	,1,'out_alt');

SELECT * FROM out_alt;

SELECT assert(e_weight = 4, 'Wrong output in graph (SSSP)')
	FROM out_alt WHERE v_id = 6;
SELECT assert(parent = 5, 'Wrong parent in graph (SSSP)')
	FROM out_alt WHERE v_id = 6;

CREATE TABLE edge_gr AS
( 	SELECT *, 0 AS grp FROM "EDGE"
	UNION
	SELECT *, 1 AS grp FROM "EDGE" WHERE src < 6 AND dest < 6
	UNION
	SELECT *, 2 AS grp FROM "EDGE" WHERE src < 6 AND dest < 6
);

INSERT INTO edge_gr VALUES
(7,NULL,NULL,1),
(4,0,-20,2);

SELECT graph_sssp('vertex',NULL,'edge_gr',NULL,0,'out_gr','grp');

SELECT assert(weight = 3, 'Wrong output in graph (SSSP)')
	FROM out_gr WHERE id = 6 AND grp = 0;
SELECT assert(parent = 5, 'Wrong parent in graph (SSSP)')
	FROM out_gr WHERE id = 6 AND grp = 0;

SELECT assert(weight = 2, 'Wrong output in graph (SSSP)')
	FROM out_gr WHERE id = 5 AND grp = 1;
SELECT assert(parent = 2, 'Wrong parent in graph (SSSP)')
	FROM out_gr WHERE id = 5 AND grp = 1;

SELECT assert(weight = 'Infinity', 'Wrong output in graph (SSSP)')
	FROM out_gr WHERE id = 7 AND grp = 1;

SELECT graph_sssp_get_path('out_gr',5,'out_gr_path');

CREATE TABLE edge_gr2 AS
( 	SELECT *, 0 AS grp1, 0 AS grp2 FROM "EDGE"
	UNION
	SELECT *, 1 AS grp1, 0 AS grp2 FROM "EDGE" WHERE src < 6 AND dest < 6
	UNION
	SELECT *, 1 AS grp1, 1 AS grp2 FROM "EDGE" WHERE src < 6 AND dest < 6
);

SELECT graph_sssp('vertex',NULL,'edge_gr2',NULL,0,'out_gr2','grp1,grp2');

SELECT assert(weight = 3, 'Wrong output in graph (SSSP)')
	FROM out_gr2 WHERE id = 6 AND grp1 = 0 AND grp2 = 0;
SELECT assert(parent = 5, 'Wrong parent in graph (SSSP)')
	FROM out_gr2 WHERE id = 6 AND grp1 = 0 AND grp2 = 0;

CREATE TABLE "edge_Q" AS SELECT src, dest AS "dest_Q", weight FROM "EDGE";

SELECT graph_sssp('vertex','','"edge_Q"','dest="dest_Q"',0,'"out_Q"','');

SELECT * FROM "out_Q";
SELECT * FROM "out_Q_summary";
SELECT graph_sssp_get_path('"out_Q"',5,'"out_Q_path"');

SELECT * FROM "out_Q_path";

-- Test for common column names in vertex and edge tables

DROP TABLE IF EXISTS out, out_summary;
ALTER TABLE vertex RENAME COLUMN id TO src;

SELECT graph_sssp('vertex','src','edge_gr',NULL,0,'out','grp');
SELECT * FROM out;

DROP TABLE IF EXISTS out, out_summary;
ALTER TABLE vertex RENAME COLUMN src TO dest;

SELECT graph_sssp('vertex','dest','edge_gr',NULL,0,'out','grp');
SELECT * FROM out;

ALTER TABLE vertex RENAME COLUMN dest TO id;

-- Test for bigint columns

CREATE TABLE v2 AS SELECT (id+992147483647)::bigint as id FROM vertex;
CREATE TABLE e2 AS SELECT (src+992147483647)::bigint as src, (dest+992147483647)::bigint as dest, weight FROM "EDGE";

DROP TABLE IF EXISTS pg_temp.out2, pg_temp.out2_summary, pg_temp.out2_path;
SELECT graph_sssp('v2',NULL,'e2',NULL,992147483647,'pg_temp.out2');
SELECT count(*) from pg_temp.out2;
SELECT graph_sssp_get_path('pg_temp.out2',992147483652,'pg_temp.out2_path');

-- Test for infinite paths
DROP TABLE IF EXISTS out, out_summary, out_path;
DELETE FROM "EDGE" WHERE dest = 7;

SELECT graph_sssp('vertex',NULL,'"EDGE"',NULL,0,'out');

SELECT assert(count(*) = 0, 'Null parent in the out table') FROM
(SELECT * FROM out WHERE parent IS NULL)q1;

SELECT graph_sssp_get_path('out',5,'out_path');