38
36
semesterid SERIAL PRIMARY KEY NOT NULL,
39
37
year CHAR(4) NOT NULL,
40
38
semester CHAR(1) NOT NULL,
39
state TEXT NOT NULL CHECK (state IN ('disabled', 'past',
40
'current', 'future')) DEFAULT 'current',
42
41
UNIQUE (year, semester)
45
CREATE OR REPLACE FUNCTION deactivate_semester_enrolments_update()
48
IF OLD.active = true AND NEW.active = false THEN
49
UPDATE enrolment SET active=false WHERE offeringid IN (
50
SELECT offeringid FROM offering WHERE offering.semesterid = NEW.semesterid);
56
CREATE TRIGGER deactivate_semester_enrolments
57
AFTER UPDATE ON semester
58
FOR EACH ROW EXECUTE PROCEDURE deactivate_semester_enrolments_update();
60
44
CREATE TABLE offering (
61
45
offeringid SERIAL PRIMARY KEY NOT NULL,
62
46
subject INT4 REFERENCES subject (subjectid) NOT NULL,
138
124
PRIMARY KEY (loginid,offeringid)
141
CREATE OR REPLACE FUNCTION confirm_active_semester_insertupdate()
146
SELECT semester.active INTO active FROM offering, semester WHERE offeringid=NEW.offeringid AND semester.semesterid = offering.semesterid;
147
IF NOT active AND NEW.active = true THEN
148
RAISE EXCEPTION ''cannot have active enrolment for % in offering %, as the semester is inactive'', NEW.loginid, NEW.offeringid;
152
' LANGUAGE 'plpgsql';
154
CREATE TRIGGER confirm_active_semester
155
BEFORE INSERT OR UPDATE ON enrolment
156
FOR EACH ROW EXECUTE PROCEDURE confirm_active_semester_insertupdate();
158
127
CREATE TABLE assessed (
159
128
assessedid SERIAL PRIMARY KEY NOT NULL,
160
129
loginid INT4 REFERENCES login (loginid),
203
172
CREATE TABLE worksheet (
204
173
worksheetid SERIAL PRIMARY KEY,
205
174
offeringid INT4 REFERENCES offering (offeringid) NOT NULL,
206
identifier VARCHAR NOT NULL,
175
identifier TEXT NOT NULL,
178
assessable BOOLEAN NOT NULL,
179
seq_no INT4 NOT NULL,
180
format TEXT NOT NUll,
209
181
UNIQUE (offeringid, identifier)
212
CREATE TABLE worksheet_problem (
213
worksheetid INT4 REFERENCES worksheet (worksheetid) NOT NULL,
214
problemid TEXT REFERENCES problem (identifier) NOT NULL,
216
PRIMARY KEY (worksheetid, problemid)
184
CREATE TABLE worksheet_exercise (
185
ws_ex_id SERIAL PRIMARY KEY,
186
worksheetid INT4 REFERENCES worksheet (worksheetid) NOT NULL,
187
exerciseid TEXT REFERENCES exercise (identifier) NOT NULL,
188
seq_no INT4 NOT NULL,
189
active BOOLEAN NOT NULL DEFAULT true,
190
optional BOOLEAN NOT NULL,
191
UNIQUE (worksheetid, exerciseid)
219
CREATE TABLE problem_attempt (
220
problemid TEXT REFERENCES problem (identifier) NOT NULL,
194
CREATE TABLE exercise_attempt (
221
195
loginid INT4 REFERENCES login (loginid) NOT NULL,
222
worksheetid INT4 REFERENCES worksheet (worksheetid) NOT NULL,
196
ws_ex_id INT4 REFERENCES worksheet_exercise (ws_ex_id) NOT NULL,
223
197
date TIMESTAMP NOT NULL,
224
attempt VARCHAR NOT NULL,
198
attempt TEXT NOT NULL,
225
199
complete BOOLEAN NOT NULL,
226
200
active BOOLEAN NOT NULL DEFAULT true,
227
PRIMARY KEY (problemid,loginid,worksheetid,date)
201
PRIMARY KEY (loginid, ws_ex_id, date)
230
CREATE TABLE problem_save (
231
problemid TEXT REFERENCES problem (identifier) NOT NULL,
204
CREATE TABLE exercise_save (
232
205
loginid INT4 REFERENCES login (loginid) NOT NULL,
233
worksheetid INT4 REFERENCES worksheet (worksheetid) NOT NULL,
206
ws_ex_id INT4 REFERENCES worksheet_exercise (ws_ex_id) NOT NULL,
234
207
date TIMESTAMP NOT NULL,
235
208
text TEXT NOT NULL,
236
PRIMARY KEY (problemid,loginid, worksheetid)
209
PRIMARY KEY (loginid, ws_ex_id)
239
212
CREATE TABLE test_suite (
240
213
suiteid SERIAL PRIMARY KEY,
241
problemid TEXT REFERENCES problem (identifier) NOT NULL,
214
exerciseid TEXT REFERENCES exercise (identifier) NOT NULL,
242
215
description TEXT,