added auxiliary stored functions for reporting

tracsubtickets/reporting/c_tracsubticket_tree_.pg.sql

@@ -0,0 +1,61 @@
+-- Copyright (C) 2016 Theodor Norup
+-- All rights reserved.
+
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions
+-- are met:
+
+-- 1. Redistributions of source code must retain the above copyright
+--    notice, this list of conditions and the following disclaimer.
+-- 2. Redistributions in binary form must reproduce the above copyright
+--    notice, this list of conditions and the following disclaimer in
+--    the documentation and/or other materials provided with the
+--    distribution.
+-- 3. The name of the author may not be used to endorse or promote
+--    products derived from this software without specific prior
+--    written permission.
+
+-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS
+-- OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+-- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+-- ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+-- DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+-- GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+-- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+-- WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+-- Auxiliary stored procedure for use with reporting of Trac subticket
+-- hierarchies:
+
+-- Return depth-first traversal of the subticket hiearachy.
+
+-- Uses Common Table Expression; see
+-- https://www.postgresql.org/docs/9.1/static/queries-with.html
+-- for explanation of the technique
+
+CREATE OR REPLACE FUNCTION tracsubticket_tree () RETURNS TABLE (id int, parent int, level int, path int[])
+
+AS $$
+WITH RECURSIVE tree AS (
+     SELECT p.id,  
+     	    s1.parent, 
+	    1 AS level, 
+	    array[id] AS path
+     FROM ticket p
+     	  FULL OUTER JOIN subtickets s1 ON p.id = s1.child
+     WHERE s1.parent IS NULL
+UNION ALL
+     SELECT ch.id, 
+     	    s2.parent, 
+	    tr.level+1, 
+	    path||ch.id
+     FROM ticket ch INNER JOIN subtickets s2 ON ch.id = s2.child
+     JOIN tree tr ON s2.parent = tr.id
+)
+SELECT id, parent, level, path
+FROM tree
+$$
+LANGUAGE SQL;

tracsubtickets/reporting/c_tracsubticket_tree_int.pg.sql

@@ -0,0 +1,55 @@
+-- Copyright (C) 2016 Theodor Norup
+-- All rights reserved.
+
+-- Redistribution and use in source and binary forms, with or without
+-- modification, are permitted provided that the following conditions
+-- are met:
+
+-- 1. Redistributions of source code must retain the above copyright
+--    notice, this list of conditions and the following disclaimer.
+-- 2. Redistributions in binary form must reproduce the above copyright
+--    notice, this list of conditions and the following disclaimer in
+--    the documentation and/or other materials provided with the
+--    distribution.
+-- 3. The name of the author may not be used to endorse or promote
+--    products derived from this software without specific prior
+--    written permission.
+
+-- THIS SOFTWARE IS PROVIDED BY THE AUTHOR `AS IS'' AND ANY EXPRESS
+-- OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+-- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+-- ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+-- DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+-- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+-- GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+-- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+-- WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+-- Auxiliary stored procedure for use with reporting of Trac subticket
+-- hierarchies:
+
+-- Return depth-first traversal of the subticket hiearachy with root 
+-- ticket id equal to ROOT
+
+-- Uses Common Table Expression; see
+-- https://www.postgresql.org/docs/9.1/static/queries-with.html
+-- for explanation of the technique
+
+CREATE OR REPLACE FUNCTION tracsubticket_tree (root int) RETURNS TABLE (id int, parent int, level int, path int[])
+
+AS $$
+WITH RECURSIVE tree AS (
+     SELECT p.id,  s1.parent, 1 AS level, array[id] AS path
+     FROM ticket p FULL OUTER JOIN subtickets s1 ON p.id = s1.child
+     WHERE s1.parent IS NULL and p.id = $1
+UNION ALL
+     SELECT ch.id, s2.parent, tr.level+1, path||ch.id
+     FROM ticket ch INNER JOIN subtickets s2 ON ch.id = s2.child
+     JOIN tree tr ON s2.parent = tr.id
+)
+SELECT id, parent, level, path
+FROM tree
+$$
+LANGUAGE SQL;