xref: /sqlite-3.40.0/test/triggerE.test (revision fb32c44e) 
1# 2009 December 29
2#
3# The author disclaims copyright to this source code.  In place of
4# a legal notice', here is a blessing:
5#
6#    May you do good and not evil.
7#    May you find forgiveness for yourself and forgive others.
8#    May you share freely, never taking more than you give.
9#
10#***********************************************************************
11#
12# This file tests the effects of SQL variable references embedded in
13# triggers. If the user attempts to create such a trigger, it is an
14# error. However, if an existing trigger definition is read from
15# the sqlite_master table, the variable reference always evaluates
16# to NULL.
17#
18
19set testdir [file dirname $argv0]
20source $testdir/tester.tcl
21ifcapable {!trigger} {
22  finish_test
23  return
24}
25set testprefix triggerE
26
27do_execsql_test 1.0 {
28  CREATE TABLE t1(a, b);
29  CREATE TABLE t2(c, d);
30  CREATE TABLE t3(e, f);
31}
32
33# forcedelete test.db2
34# do_execsql_test 1.1 {
35#   ATTACH 'test.db2' AS aux;
36#   CREATE TABLE aux.t4(x);
37#   INSERT INTO aux.t4 VALUES(5);
38#
39#   CREATE TRIGGER tr1 AFTER INSERT ON t1 WHEN new.a IN (SELECT x FROM aux.t4)
40#   BEGIN
41#     SELECT 1;
42#   END;
43# }
44# do_execsql_test 1.2 { INSERT INTO t1 VALUES(1,1); }
45# do_execsql_test 1.3 { INSERT INTO t1 VALUES(5,5); }
46
47#-------------------------------------------------------------------------
48# Attempt to create various triggers that use bound variables.
49#
50set errmsg "trigger cannot use variables"
51foreach {tn defn} {
52  1 { AFTER INSERT ON t1 WHEN new.a = ? BEGIN SELECT 1; END; }
53  2 { BEFORE DELETE ON t1 BEGIN SELECT ?; END; }
54  3 { BEFORE DELETE ON t1 BEGIN SELECT * FROM (SELECT * FROM (SELECT ?)); END; }
55  5 { BEFORE DELETE ON t1 BEGIN SELECT * FROM t2 GROUP BY ?; END; }
56  6 { BEFORE DELETE ON t1 BEGIN SELECT * FROM t2 LIMIT ?; END; }
57  7 { BEFORE DELETE ON t1 BEGIN SELECT * FROM t2 ORDER BY ?; END; }
58  8 { BEFORE UPDATE ON t1 BEGIN UPDATE t2 SET c = ?; END; }
59  9 { BEFORE UPDATE ON t1 BEGIN UPDATE t2 SET c = 1 WHERE d = ?; END; }
60 10 { AFTER INSERT ON t1 BEGIN SELECT * FROM pragma_stats(?); END; }
61} {
62  catchsql {drop trigger tr1}
63  do_catchsql_test 1.1.$tn "CREATE TRIGGER tr1 $defn" [list 1 $errmsg]
64  do_catchsql_test 1.2.$tn "CREATE TEMP TRIGGER tr1 $defn" [list 1 $errmsg]
65}
66
67#-------------------------------------------------------------------------
68# Test that variable references within trigger definitions loaded from
69# the sqlite_master table are automatically converted to NULL.
70#
71do_execsql_test 2.1 {
72  PRAGMA writable_schema = 1;
73  INSERT INTO sqlite_master VALUES('trigger', 'tr1', 't1', 0,
74    'CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN
75        INSERT INTO t2 VALUES(?1, ?2);
76     END'
77  );
78
79  INSERT INTO sqlite_master VALUES('trigger', 'tr2', 't3', 0,
80    'CREATE TRIGGER tr2 AFTER INSERT ON t3 WHEN ?1 IS NULL BEGIN
81        UPDATE t2 SET c=d WHERE c IS ?2;
82     END'
83  );
84}
85db close
86sqlite3 db test.db
87
88do_execsql_test 2.2.1 {
89  INSERT INTO t1 VALUES(1, 2);
90  SELECT * FROM t2;
91} {{} {}}
92do_test 2.2.2 {
93  set one 3
94  execsql {
95    DELETE FROM t2;
96    INSERT INTO t1 VALUES($one, ?1);
97    SELECT * FROM t2;
98  }
99} {{} {}}
100do_execsql_test 2.2.3 { SELECT * FROM t1 } {1 2 3 3}
101
102do_execsql_test 2.3 {
103  DELETE FROM t2;
104  INSERT INTO t2 VALUES('x', 'y');
105  INSERT INTO t2 VALUES(NULL, 'z');
106  INSERT INTO t3 VALUES(1, 2);
107  SELECT * FROM t3;
108  SELECT * FROM t2;
109} {1 2 x y z z}
110
111finish_test
112