From: Marius Gavrilescu <marius@ieval.ro>
Date: Tue, 31 Mar 2015 08:27:10 +0000 (+0300)
Subject: Simplify user_list
X-Git-Tag: 5999.000_014~39
X-Git-Url: http://git.ieval.ro/?p=gruntmaster-data.git;a=commitdiff_plain;h=cc6974a9fd40c60cc99785615b2b2d1e80ab91c6

Simplify user_list
---

diff --git a/db.sql b/db.sql
index 9343d0b..44e2420 100644
--- a/db.sql
+++ b/db.sql
@@ -161,36 +161,15 @@ CREATE OR REPLACE VIEW user_data AS (SELECT
 	FROM users
 );
 
-CREATE OR REPLACE VIEW user_solved_problems AS (SELECT
-	us.id,
-	COALESCE(array_agg(ps.problem) FILTER (WHERE ps.problem IS NOT NULL), ARRAY[]::text[]) AS solved
-	FROM users us
-	LEFT JOIN (SELECT * FROM problem_status WHERE solved = TRUE) ps ON ps.owner=id
-	GROUP BY us.id);
-
-CREATE OR REPLACE VIEW user_attempted_problems AS (SELECT
-	us.id,
-	COALESCE(array_agg(ps.problem) FILTER (WHERE ps.problem IS NOT NULL), ARRAY[]::text[]) AS attempted
-	FROM users us
-	LEFT JOIN (SELECT * FROM problem_status WHERE solved = FALSE) ps ON ps.owner=id
-	GROUP BY us.id);
-
-CREATE OR REPLACE VIEW user_contests AS (SELECT
-	us.id,
-	COALESCE(array_agg(cs.contest) FILTER (WHERE cs.contest IS NOT NULL), ARRAY[]::text[]) AS contests
-	FROM users us
-	LEFT JOIN contest_status cs ON cs.owner=id
-	GROUP BY us.id);
-
 CREATE OR REPLACE VIEW user_list AS (SELECT
 	dt.*,
-	COALESCE(array_length(solved, 1), 0) AS solved,
-	COALESCE(array_length(attempted, 1), 0) AS attempted,
-	COALESCE(array_length(contests, 1), 0) AS contests
+	COALESCE(solved, 0) as solved,
+	COALESCE(attempted, 0) as attempted,
+	COALESCE(contests, 0) as contests
 	FROM user_data dt
-	JOIN user_contests ct USING (id)
-	JOIN user_solved_problems sp USING (id)
-	JOIN user_attempted_problems ap USING (id)
+	LEFT JOIN (SELECT owner as id, COUNT(*) as solved FROM problem_status WHERE solved=TRUE GROUP BY owner) ps USING (id)
+	LEFT JOIN (SELECT owner as id, COUNT(*) as attempted FROM problem_status WHERE solved=FALSE GROUP BY owner) pa USING (id)
+	LEFT JOIN (SELECT owner as id, COUNT(*) as contests FROM contest_status GROUP BY owner) ct USING (id)
 	ORDER BY solved DESC, attempted DESC, id);
 
 CREATE OR REPLACE VIEW contest_entry AS (SELECT