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A function which can expand collections inside collections.

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Including through bindings.
This commit is contained in:
Andrew McMillan 2012-05-05 23:00:28 +12:00
parent b1256ecb6e
commit 5e195b151e
1 changed files with 52 additions and 1 deletions
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53
dba/caldav_functions.sql
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@ -1295,4 +1295,55 @@ BEGIN
RETURN FALSE;
END;
$$ LANGUAGE plpgsql ;
CREATE or REPLACE FUNCTION collections_within( INT, INT ) RETURNS SETOF INT AS $$
DECLARE
in_collection_id ALIAS FOR $1;
in_depth ALIAS FOR $2;
resource_id INT;
found_some BOOLEAN;
BEGIN
in_depth := in_depth - 1;
found_some = FALSE;
FOR resource_id IN SELECT b.bound_source_id FROM dav_binding b
JOIN collection pc ON (b.parent_container = pc.dav_name)
WHERE pc.collection_id = in_collection_id
LOOP
found_some = TRUE;
RETURN NEXT resource_id;
IF in_depth > 0 THEN
FOR resource_id IN SELECT * FROM collections_within( resource_id, in_depth ) LOOP
RETURN NEXT resource_id;
END LOOP;
END IF;
END LOOP;
FOR resource_id IN SELECT c.collection_id FROM collection c
JOIN collection pc ON (c.parent_container = pc.dav_name)
WHERE pc.collection_id = in_collection_id
LOOP
found_some = TRUE;
RETURN NEXT resource_id;
IF in_depth > 0 THEN
FOR resource_id IN SELECT * FROM collections_within( resource_id, in_depth ) LOOP
RETURN NEXT resource_id;
END LOOP;
END IF;
END LOOP;
IF found_some THEN
RETURN;
END IF;
FOR resource_id IN SELECT c.collection_id FROM collection c
JOIN dav_principal pc ON (c.parent_container = pc.dav_name)
WHERE pc.principal_id = in_collection_id
LOOP
RETURN NEXT resource_id;
IF in_depth > 0 THEN
FOR resource_id IN SELECT * FROM collections_within( resource_id, in_depth ) LOOP
RETURN NEXT resource_id;
END LOOP;
END IF;
END LOOP;
END;
$$ LANGUAGE plpgsql ;