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/*PGR-GNU*****************************************************************
File: depthFirstSearch.sql
Generated with Template by:
Copyright (c) 2020 pgRouting developers
Mail: project@pgrouting.org
Function's developer:
Copyright (c) 2020 Ashish Kumar
Mail: ashishkr23438@gmail.com
------
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_depthFirstSearch
--------------------------
-- SINGLE VERTEX
--v3.2
CREATE FUNCTION pgr_depthFirstSearch(
TEXT, -- edges_sql (required)
BIGINT, -- root_vid (required)
directed BOOLEAN DEFAULT true,
max_depth BIGINT DEFAULT 9223372036854775807,
OUT seq BIGINT,
OUT depth BIGINT,
OUT start_vid BIGINT,
OUT node BIGINT,
OUT edge BIGINT,
OUT cost FLOAT,
OUT agg_cost FLOAT)
RETURNS SETOF RECORD AS
$BODY$
BEGIN
IF $4 < 0 THEN
RAISE EXCEPTION 'Negative value found on ''max_depth'''
USING HINT = format('Value found: %s', $4);
END IF;
RETURN QUERY
SELECT *
FROM _pgr_depthFirstSearch(_pgr_get_statement($1), ARRAY[$2]::BIGINT[], directed, max_depth);
END;
$BODY$
LANGUAGE plpgsql VOLATILE STRICT;
-- MULTIPLE VERTICES
--v3.2
CREATE FUNCTION pgr_depthFirstSearch(
TEXT, -- edges_sql (required)
ANYARRAY, -- root_vids (required)
directed BOOLEAN DEFAULT true,
max_depth BIGINT DEFAULT 9223372036854775807,
OUT seq BIGINT,
OUT depth BIGINT,
OUT start_vid BIGINT,
OUT node BIGINT,
OUT edge BIGINT,
OUT cost FLOAT,
OUT agg_cost FLOAT)
RETURNS SETOF RECORD AS
$BODY$
BEGIN
IF $4 < 0 THEN
RAISE EXCEPTION 'Negative value found on ''max_depth'''
USING HINT = format('Value found: %s', $4);
END IF;
RETURN QUERY
SELECT *
FROM _pgr_depthFirstSearch(_pgr_get_statement($1), $2, directed, max_depth);
END;
$BODY$
LANGUAGE plpgsql VOLATILE STRICT;
-- COMMENTS
COMMENT ON FUNCTION pgr_depthFirstSearch(TEXT, BIGINT, BOOLEAN, BIGINT)
IS 'pgr_depthFirstSearch(Single Vertex)
- PROPOSED
- Parameters:
- Edges SQL with columns: id, source, target, cost [,reverse_cost]
- From root vertex identifier
- Optional parameters
- directed := true
- max_depth := 9223372036854775807
- Documentation:
- ${PROJECT_DOC_LINK}/pgr_depthFirstSearch.html
';
COMMENT ON FUNCTION pgr_depthFirstSearch(TEXT, ANYARRAY, BOOLEAN, BIGINT)
IS 'pgr_depthFirstSearch(Multiple Vertices)
- PROPOSED
- Parameters:
- Edges SQL with columns: id, source, target, cost [,reverse_cost]
- From ARRAY[root vertices identifiers]
- Optional parameters
- directed := true
- max_depth := 9223372036854775807
- Documentation:
- ${PROJECT_DOC_LINK}/pgr_depthFirstSearch.html
';
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