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/*PGR-GNU*****************************************************************
File: primDFS.sql
Copyright (c) 2018 Vicky Vergara
Mail: vicky at vicky at erosion dot dev
------
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
********************************************************************PGR-GNU*/
-----------------
-- pgr_primDFS
-----------------
-- SINGLE VERTEX
--v3.7
CREATE FUNCTION pgr_primDFS(
TEXT, -- Edge sql
BIGINT, -- root vertex
max_depth BIGINT DEFAULT 9223372036854775807,
OUT seq BIGINT,
OUT depth BIGINT,
OUT start_vid BIGINT,
OUT pred BIGINT,
OUT node BIGINT,
OUT edge BIGINT,
OUT cost FLOAT,
OUT agg_cost FLOAT)
RETURNS SETOF RECORD AS
$BODY$
SELECT seq, depth, start_vid, pred, node, edge, cost, agg_cost
FROM _pgr_primv4(_pgr_get_statement($1), ARRAY[$2]::BIGINT[], 'DFS', $3, -1);
$BODY$
LANGUAGE SQL VOLATILE STRICT
COST ${COST_HIGH} ROWS ${ROWS_HIGH};
--v3.7
CREATE FUNCTION pgr_primDFS(
TEXT, -- Edge sql
ANYARRAY, -- root vertices
max_depth BIGINT DEFAULT 9223372036854775807,
OUT seq BIGINT,
OUT depth BIGINT,
OUT start_vid BIGINT,
OUT pred BIGINT,
OUT node BIGINT,
OUT edge BIGINT,
OUT cost FLOAT,
OUT agg_cost FLOAT)
RETURNS SETOF RECORD AS
$BODY$
SELECT seq, depth, start_vid, pred, node, edge, cost, agg_cost
FROM _pgr_primv4(_pgr_get_statement($1), $2, 'DFS', $3, -1);
$BODY$
LANGUAGE SQL VOLATILE STRICT
COST ${COST_HIGH} ROWS ${ROWS_HIGH};
COMMENT ON FUNCTION pgr_primDFS(TEXT, BIGINT, BIGINT)
IS 'pgr_primDFS(Single Vertex)
- Undirected graph
- Parameters:
- Edges SQL with columns: id, source, target, cost [,reverse_cost]
- From root vertex identifier
- Optional parameters
- max_depth := 9223372036854775807
- Documentation:
- ${PROJECT_DOC_LINK}/pgr_primDFS.html
';
COMMENT ON FUNCTION pgr_primDFS(TEXT, ANYARRAY, BIGINT)
IS 'pgr_primDFS(Multiple Vertices)
- Undirected graph
- Parameters:
- Edges SQL with columns: id, source, target, cost [,reverse_cost]
- From ARRAY[root vertices identifiers]
- Optional parameters
- max_depth := 9223372036854775807
- Documentation:
- ${PROJECT_DOC_LINK}/pgr_primDFS.html
';
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