tasks/database/temp.sql

169 lines
4.3 KiB
MySQL
Raw Normal View History

\i database/config.sql
/*
* Move a set of tasks from a container to another.
* Returns the following error codes:
* 0 No error
* 1 Deleted tasks
* 2 Moved tasks (not in specified container)
* 3 Target item/task deleted
* 4 Moving tasks to one of their children
* 5 Dependencies would be broken, and _force is FALSE
*/
DROP FUNCTION IF EXISTS tasks_move( BOOLEAN , INT , BOOLEAN , INT , BOOLEAN , INT[] );
CREATE FUNCTION tasks_move( _fromTask BOOLEAN , _fromId INT , _toTask BOOLEAN , _toId INT , _force BOOLEAN , _tasks INT[] )
RETURNS INT
LANGUAGE PLPGSQL
STRICT VOLATILE
SECURITY DEFINER
AS $tasks_move$
DECLARE
_i INT;
_ltc_source INT;
_ltc_dest INT;
BEGIN
-- Create the temporary table for tasks
PERFORM _tm_create_temp( _tasks );
-- Make sure all specified tasks exists
SELECT INTO _i COUNT( * )
FROM _tm_tasks
INNER JOIN tasks USING( task_id );
IF _i <> array_length( _tasks , 1 ) THEN
RETURN 1;
END IF;
-- Make sure all tasks match the specified container
PERFORM task_id
FROM _tm_tasks
INNER JOIN tasks USING( task_id )
WHERE ( task_id_parent IS NOT NULL ) <> _fromTask
OR ( CASE
WHEN task_id_parent IS NULL THEN
item_id
ELSE
task_id_parent
END ) <> _fromId;
IF FOUND THEN
RETURN 2;
END IF;
-- If the source and destination are the same, we're done.
IF _fromTask = _toTask AND _fromId = _toId THEN
RETURN 0;
END IF;
-- Make sure that the destination exists. Also get the target LTC ID.
IF _toTask THEN
SELECT INTO _ltc_dest ltc_id
FROM logical_task_containers
WHERE task_id = _toId;
ELSE
SELECT INTO _ltc_dest ltc_id
FROM logical_task_containers
WHERE task_id IS NULL;
PERFORM item_id FROM items WHERE item_id = _toId;
END IF;
IF NOT FOUND THEN
RETURN 3;
END IF;
-- If we're moving to a task, make sure it isn't a child of any of the
-- tasks that are being moved.
IF _toTask THEN
PERFORM * FROM _tm_tasks _mv
INNER JOIN tasks_tree _tree
ON _mv.task_id = _tree.task_id_parent
WHERE task_id_child = _toId;
IF FOUND THEN
RETURN 4;
END IF;
END IF;
-- Get the source LTC ID.
IF _fromTask THEN
SELECT INTO _ltc_source ltc_id
FROM logical_task_containers
WHERE task_id = _fromId;
ELSE
SELECT INTO _ltc_source ltc_id
FROM logical_task_containers
WHERE task_id IS NULL;
END IF;
-- If we're changing the LTC, handle dependencies.
IF _ltc_source <> _ltc_dest AND NOT _force THEN
-- Check them if we're not forcing the move.
PERFORM _tdn.task_id
FROM taskdep_nodes _tdn
INNER JOIN _tm_tasks _tmt
USING( task_id )
LEFT OUTER JOIN _tm_tasks _tmt2
ON _tmt2.task_id = _tdn.task_id_copyof
WHERE _tdn.tnode_depth = 1 AND _tmt2.task_id IS NULL;
IF FOUND THEN
RETURN 5;
END IF;
ELSIF _ltc_source <> _ltc_dest AND _force THEN
-- Otherwise, break them.
DELETE FROM task_dependencies
WHERE taskdep_id IN (
SELECT DISTINCT _tdn.taskdep_id
FROM taskdep_nodes _tdn
INNER JOIN _tm_tasks _tmt
USING( task_id )
LEFT OUTER JOIN _tm_tasks _tmt2
ON _tmt2.task_id = _tdn.task_id_copyof
WHERE _tdn.tnode_depth = 1 AND _tmt2.task_id IS NULL
);
END IF;
-- We're ready to move the tasks themselves.
IF _toTask THEN
SELECT INTO _i item_id FROM tasks WHERE task_id = _toId;
ELSE
_i := _toId;
END IF;
UPDATE tasks SET item_id = _i , ltc_id = _ltc_dest
WHERE task_id IN (
SELECT task_id FROM _tm_tasks
);
RETURN 0;
END;
$tasks_move$;
REVOKE EXECUTE ON FUNCTION tasks_move( BOOLEAN , INT , BOOLEAN , INT , BOOLEAN , INT[] ) FROM PUBLIC;
GRANT EXECUTE ON FUNCTION tasks_move( BOOLEAN , INT , BOOLEAN , INT , BOOLEAN , INT[] ) TO :webapp_user;
/*
* Function used by tasks_move to insert all tasks into a temporary table.
*/
DROP FUNCTION IF EXISTS _tm_create_temp( INT[] );
CREATE FUNCTION _tm_create_temp( _tasks INT[] )
RETURNS VOID
LANGUAGE PLPGSQL
STRICT VOLATILE
SECURITY INVOKER
AS $_tm_create_temp$
DECLARE
_i INT;
BEGIN
SET LOCAL client_min_messages=warning;
DROP TABLE IF EXISTS _tm_tasks;
RESET client_min_messages;
CREATE TEMPORARY TABLE _tm_tasks(
task_id INT
) ON COMMIT DROP;
FOR _i IN array_lower( _tasks , 1 ) .. array_upper( _tasks , 1 )
LOOP
INSERT INTO _tm_tasks( task_id ) VALUES ( _tasks[ _i ] );
END LOOP;
END;
$_tm_create_temp$;
REVOKE EXECUTE ON FUNCTION _tm_create_temp( INT[] ) FROM PUBLIC;