Added user_id and exp_id (disinction between both)

sql/backup.pgsql

@@ -1,3 +1,4 @@
+-- Clear database from previous tables (just in case...)
 DROP TABLE IF EXISTS users CASCADE;
 DROP TABLE IF EXISTS arrowclicked CASCADE;
 DROP TABLE IF EXISTS coinclicked CASCADE;
@@ -5,11 +6,14 @@ DROP TABLE IF EXISTS keyboardevent CASCADE;
 DROP TABLE IF EXISTS resetclicked CASCADE;
 DROP TABLE IF EXISTS previousnextclicked CASCADE;
 DROP TABLE IF EXISTS hovered CASCADE;
+DROP TABLE IF EXISTS scene CASCADE;
+DROP TABLE IF EXISTS experiment CASCADE;
 
 DROP TYPE IF EXISTS VECTOR3 CASCADE;
 DROP TYPE IF EXISTS CAMERA CASCADE;
 DROP TYPE IF EXISTS PREVIOUSNEXT CASCADE;
 
+-- Elementary types
 CREATE TYPE PREVIOUSNEXT AS ENUM(
     'p', 'n'
 );
@@ -25,41 +29,60 @@ CREATE TYPE CAMERA AS(
     target VECTOR3
 );
 
+-- Base tables
 CREATE TABLE users(
     id SERIAL PRIMARY KEY,
     name CHAR(50)
 );
 
-CREATE TABLE arrowclicked(
+CREATE TABLE scene(
+    id SERIAL PRIMARY KEY,
+    name CHAR(50)
+);
+
+CREATE TABLE experiment(
     id SERIAL PRIMARY KEY,
     user_id SERIAL REFERENCES users (id),
+    scene_id SERIAL REFERENCES scene (id)
+);
+
+-- Init scene table
+INSERT INTO scene(name) VALUES ('peachcastle');
+INSERT INTO scene(name) VALUES ('bobomb');
+INSERT INTO scene(name) VALUES ('coolcoolmountain');
+INSERT INTO scene(name) VALUES ('whomp');
+
+-- Events
+CREATE TABLE arrowclicked(
+    id SERIAL PRIMARY KEY,
+    exp_id SERIAL REFERENCES experiment (id),
     time TIMESTAMP DEFAULT NOW(),
     arrow_id INTEGER
 );
 
 CREATE TABLE coinclicked(
     id SERIAL PRIMARY KEY,
-    user_id SERIAL REFERENCES users (id),
+    exp_id SERIAL REFERENCES experiment (id),
     time TIMESTAMP DEFAULT NOW(),
     coin_id INTEGER
 );
 
 CREATE TABLE keyboardevent(
     id SERIAL PRIMARY KEY,
-    user_id SERIAL REFERENCES users (id),
+    exp_id SERIAL REFERENCES experiment (id),
     time TIMESTAMP DEFAULT NOW(),
     camera CAMERA
 );
 
 CREATE TABLE resetclicked(
     id SERIAL PRIMARY KEY,
-    user_id SERIAL REFERENCES users (id),
+    exp_id SERIAL REFERENCES experiment (id),
     time TIMESTAMP DEFAULT NOW()
 );
 
 CREATE TABLE previousnextclicked(
     id SERIAL PRIMARY KEY,
-    user_id SERIAL REFERENCES users (id),
+    exp_id SERIAL REFERENCES experiment (id),
     previousnext PREVIOUSNEXT NOT NULL,
     time TIMESTAMP DEFAULT NOW(),
     camera CAMERA
@@ -67,8 +90,8 @@ CREATE TABLE previousnextclicked(
 
 CREATE TABLE hovered(
     id SERIAL PRIMARY KEY,
-    user_id SERIAL REFERENCES users (id),
+    exp_id SERIAL REFERENCES experiment (id),
     start BOOLEAN NOT NULL,
     time TIMESTAMP DEFAULT NOW(),
-    arrow_id INT
+    arrow_id INTEGER
 );