1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
|
CREATE SEQUENCE login_unixid_seq MINVALUE 1000 MAXVALUE 29999 START WITH 5000;
CREATE TABLE login (
loginid SERIAL PRIMARY KEY NOT NULL,
login VARCHAR UNIQUE NOT NULL,
passhash VARCHAR,
state VARCHAR NOT NULL CHECK (state in ('no_agreement', 'pending',
'enabled', 'disabled'))
DEFAULT 'no_agreement',
rolenm VARCHAR NOT NULL CHECK (rolenm in ('anyone', 'student',
'marker', 'tutor',
'lecturer', 'admin')),
unixid INT UNIQUE DEFAULT nextval('login_unixid_seq') NOT NULL,
nick VARCHAR NOT NULL,
pass_exp TIMESTAMP,
acct_exp TIMESTAMP,
last_login TIMESTAMP,
svn_pass VARCHAR,
email VARCHAR,
fullname VARCHAR NOT NULL,
studentid VARCHAR, -- may be null
settings VARCHAR
);
-- Subjects
-- --------
CREATE TABLE subject (
subjectid SERIAL PRIMARY KEY NOT NULL,
subj_code VARCHAR UNIQUE NOT NULL,
subj_name VARCHAR NOT NULL,
subj_short_name VARCHAR UNIQUE NOT NULL,
url VARCHAR
);
CREATE TABLE semester (
semesterid SERIAL PRIMARY KEY NOT NULL,
year CHAR(4) NOT NULL,
semester CHAR(1) NOT NULL,
active BOOL NOT NULL,
UNIQUE (year, semester)
);
CREATE OR REPLACE FUNCTION deactivate_semester_enrolments_update()
RETURNS trigger AS '
BEGIN
IF OLD.active = true AND NEW.active = false THEN
UPDATE enrolment SET active=false WHERE offeringid IN (
SELECT offeringid FROM offering WHERE offering.semesterid = NEW.semesterid);
END IF;
RETURN NULL;
END;
' LANGUAGE 'plpgsql';
CREATE TRIGGER deactivate_semester_enrolments
AFTER UPDATE ON semester
FOR EACH ROW EXECUTE PROCEDURE deactivate_semester_enrolments_update();
CREATE TABLE offering (
offeringid SERIAL PRIMARY KEY NOT NULL,
subject INT4 REFERENCES subject (subjectid) NOT NULL,
semesterid INTEGER REFERENCES semester (semesterid) NOT NULL,
groups_student_permissions VARCHAR NOT NULL DEFAULT 'none',
CHECK (groups_student_permissions in ('none', 'invite', 'create')),
UNIQUE (subject, semesterid)
);
-- Projects and groups
-- -------------------
CREATE TABLE project_set (
projectsetid SERIAL PRIMARY KEY NOT NULL,
offeringid INTEGER REFERENCES offering (offeringid) NOT NULL,
max_students_per_group INTEGER NOT NULL DEFAULT 4
);
CREATE TABLE project (
projectid SERIAL PRIMARY KEY NOT NULL,
synopsis VARCHAR,
url VARCHAR,
projectsetid INTEGER REFERENCES project_set (projectsetid) NOT NULL,
deadline TIMESTAMP
);
CREATE TABLE project_group (
groupnm VARCHAR NOT NULL,
groupid SERIAL PRIMARY KEY NOT NULL,
projectsetid INTEGER REFERENCES project_set (projectsetid) NOT NULL,
nick VARCHAR,
createdby INT4 REFERENCES login (loginid) NOT NULL,
epoch TIMESTAMP NOT NULL,
UNIQUE (projectsetid, groupnm)
);
CREATE OR REPLACE FUNCTION check_group_namespacing_insertupdate()
RETURNS trigger AS '
DECLARE
oid INTEGER;
BEGIN
SELECT offeringid INTO oid FROM project_set WHERE project_set.projectsetid = NEW.projectsetid;
PERFORM 1 FROM project_group, project_set WHERE project_set.offeringid = oid AND project_group.projectsetid = project_set.projectsetid AND project_group.groupnm = NEW.groupnm;
IF found THEN
RAISE EXCEPTION ''a project group named % already exists in offering ID %'', NEW.groupnm, oid;
END IF;
RETURN NEW;
END;
' LANGUAGE 'plpgsql';
CREATE TRIGGER check_group_namespacing
BEFORE INSERT OR UPDATE ON project_group
FOR EACH ROW EXECUTE PROCEDURE check_group_namespacing_insertupdate();
CREATE TABLE group_invitation (
loginid INT4 REFERENCES login (loginid) NOT NULL,
groupid INT4 REFERENCES project_group (groupid) NOT NULL,
inviter INT4 REFERENCES login (loginid) NOT NULL,
invited TIMESTAMP NOT NULL,
accepted TIMESTAMP,
UNIQUE (loginid,groupid)
);
CREATE TABLE group_member (
loginid INT4 REFERENCES login (loginid),
groupid INT4 REFERENCES project_group (groupid),
PRIMARY KEY (loginid,groupid)
);
CREATE TABLE enrolment (
loginid INT4 REFERENCES login (loginid),
offeringid INT4 REFERENCES offering (offeringid),
result INT,
special_result VARCHAR,
supp_result INT,
special_supp_result VARCHAR,
notes VARCHAR,
active BOOL NOT NULL DEFAULT true,
PRIMARY KEY (loginid,offeringid)
);
CREATE OR REPLACE FUNCTION confirm_active_semester_insertupdate()
RETURNS trigger AS '
DECLARE
active BOOL;
BEGIN
SELECT semester.active INTO active FROM offering, semester WHERE offeringid=NEW.offeringid AND semester.semesterid = offering.semesterid;
IF NOT active AND NEW.active = true THEN
RAISE EXCEPTION ''cannot have active enrolment for % in offering %, as the semester is inactive'', NEW.loginid, NEW.offeringid;
END IF;
RETURN NEW;
END;
' LANGUAGE 'plpgsql';
CREATE TRIGGER confirm_active_semester
BEFORE INSERT OR UPDATE ON enrolment
FOR EACH ROW EXECUTE PROCEDURE confirm_active_semester_insertupdate();
CREATE TABLE assessed (
assessedid SERIAL PRIMARY KEY NOT NULL,
loginid INT4 REFERENCES login (loginid),
groupid INT4 REFERENCES project_group (groupid),
projectid INT4 REFERENCES project (projectid) NOT NULL,
-- exactly one of loginid and groupid must be non-null
CHECK ((loginid IS NOT NULL AND groupid IS NULL)
OR (loginid IS NULL AND groupid IS NOT NULL))
);
CREATE TABLE project_extension (
assessedid INT4 REFERENCES assessed (assessedid) NOT NULL,
deadline TIMESTAMP NOT NULL,
approver INT4 REFERENCES login (loginid) NOT NULL,
notes VARCHAR
);
CREATE TABLE project_submission (
assessedid INT4 REFERENCES assessed (assessedid) NOT NULL,
path VARCHAR NOT NULL,
revision INT4 NOT NULL
);
CREATE TABLE project_mark (
assessedid INT4 REFERENCES assessed (assessedid) NOT NULL,
componentid INT4,
marker INT4 REFERENCES login (loginid) NOT NULL,
mark INT,
marked TIMESTAMP,
feedback VARCHAR,
notes VARCHAR
);
-- Worksheets
-- ----------
CREATE TABLE problem (
problemid SERIAL PRIMARY KEY NOT NULL,
identifier VARCHAR UNIQUE NOT NULL,
spec VARCHAR
);
CREATE TABLE worksheet (
worksheetid SERIAL PRIMARY KEY NOT NULL,
subject VARCHAR NOT NULL,
identifier VARCHAR NOT NULL,
assessable BOOLEAN,
mtime TIMESTAMP,
UNIQUE (subject, identifier)
);
CREATE TABLE worksheet_problem (
worksheetid INT4 REFERENCES worksheet (worksheetid) NOT NULL,
problemid INT4 REFERENCES problem (problemid) NOT NULL,
optional BOOLEAN,
PRIMARY KEY (worksheetid, problemid)
);
CREATE TABLE problem_tag (
problemid INT4 REFERENCES problem (problemid),
tag VARCHAR NOT NULL,
description VARCHAR,
standard BOOLEAN NOT NULL,
added_by INT4 REFERENCES login (loginid) NOT NULL,
date TIMESTAMP NOT NULL,
PRIMARY KEY (problemid,added_by,tag)
);
CREATE TABLE problem_test_case (
problemid INT4 REFERENCES problem (problemid) NOT NULL,
testcaseid SERIAL UNIQUE NOT NULL,
testcase VARCHAR,
description VARCHAR,
visibility VARCHAR CHECK (visibility in ('public', 'protected', 'private'))
);
CREATE TABLE problem_test_case_tag (
testcaseid INT4 REFERENCES problem_test_case (testcaseid) NOT NULL,
tag VARCHAR NOT NULL,
description VARCHAR,
standard BOOLEAN NOT NULL,
added_by INT4 REFERENCES login (loginid) NOT NULL,
date TIMESTAMP NOT NULL,
PRIMARY KEY (testcaseid,added_by,tag)
);
CREATE TABLE problem_attempt (
problemid INT4 REFERENCES problem (problemid) NOT NULL,
loginid INT4 REFERENCES login (loginid) NOT NULL,
date TIMESTAMP NOT NULL,
attempt VARCHAR NOT NULL,
complete BOOLEAN NOT NULL,
active BOOLEAN NOT NULL DEFAULT true,
PRIMARY KEY (problemid,loginid,date)
);
CREATE TABLE problem_save (
problemid INT4 REFERENCES problem (problemid) NOT NULL,
loginid INT4 REFERENCES login (loginid) NOT NULL,
date TIMESTAMP NOT NULL,
text VARCHAR NOT NULL,
PRIMARY KEY (problemid,loginid)
);
CREATE INDEX problem_attempt_index ON problem_attempt (problemid, loginid);
CREATE TABLE problem_attempt_breakdown (
problemid INT4 REFERENCES problem (problemid) NOT NULL,
testcaseid INT4 REFERENCES problem_test_case (testcaseid) NOT NULL,
loginid INT4 REFERENCES login (loginid) NOT NULL,
date TIMESTAMP NOT NULL,
result BOOLEAN
);
CREATE TABLE problem_prerequisite (
parent INT4 REFERENCES problem (problemid) NOT NULL,
child INT4 REFERENCES problem (problemid) NOT NULL,
PRIMARY KEY (parent,child)
);
|