LANGUAGE plpgsql
STABLE
RETURNS NULL ON NULL INPUT;
+
+-- use the minmax_score as a basis for finding best and worst possible ranks
+CREATE TYPE minmax_rank AS (
+ player INTEGER,
+ best_rank INTEGER,
+ worst_rank INTEGER
+);
+
+-- get_minmax_score_for_players(tournament, round, playmode)
+CREATE FUNCTION get_minmax_rank_for_players(integer, integer, varchar) RETURNS SETOF minmax_rank
+ AS $$
+DECLARE
+ ret minmax_rank;
+ tp RECORD;
+BEGIN
+ CREATE TEMPORARY TABLE temp_minmax AS SELECT * FROM get_minmax_score_for_players($1, $2, $3);
+ FOR tp IN SELECT * FROM temp_minmax LOOP
+ ret.player = tp.player;
+ ret.best_rank = 1 + ( SELECT COUNT(*) FROM temp_minmax WHERE min_score >= tp.max_score AND player<>tp.player);
+ ret.worst_rank = 1 + ( SELECT COUNT(*) FROM temp_minmax WHERE max_score > tp.min_score AND player<>tp.player );
+
+ RETURN NEXT ret;
+ END LOOP;
+ DROP TABLE temp_minmax;
+ RETURN;
+END;
+ $$
+ LANGUAGE plpgsql
+ VOLATILE -- not really, but needed for the TEMPORARY TABLE
+ RETURNS NULL ON NULL INPUT;