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dan46539d72013-10-03 12:29:38 +00001# 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 $testdir/tester.tcl
21ifcapable {!trigger} {
22 finish_test
23 return
24}
25set testprefix triggerE
26
27do_execsql_test 1.0 {
28 CREATE TABLE t1(a, b);
29 CREATE TABLE t2(c, d);
30 CREATE TABLE t3(e, f);
31}
32
33# forcedelete test.db2
34# do_execsql_test 1.1 {
35# ATTACH 'test.db2' AS aux;
36# CREATE TABLE aux.t4(x);
37# INSERT INTO aux.t4 VALUES(5);
38#
39# CREATE TRIGGER tr1 AFTER INSERT ON t1 WHEN new.a IN (SELECT x FROM aux.t4)
40# BEGIN
41# SELECT 1;
42# END;
43# }
44# do_execsql_test 1.2 { INSERT INTO t1 VALUES(1,1); }
45# do_execsql_test 1.3 { INSERT INTO t1 VALUES(5,5); }
46
47#-------------------------------------------------------------------------
48# Attempt to create various triggers that use bound variables.
49#
50set errmsg "trigger cannot use variables"
51foreach {tn defn} {
52 1 { AFTER INSERT ON t1 WHEN new.a = ? BEGIN SELECT 1; END; }
53 2 { BEFORE DELETE ON t1 BEGIN SELECT ?; END; }
54 3 { BEFORE DELETE ON t1 BEGIN SELECT * FROM (SELECT * FROM (SELECT ?)); END; }
55 5 { BEFORE DELETE ON t1 BEGIN SELECT * FROM t2 GROUP BY ?; END; }
56 6 { BEFORE DELETE ON t1 BEGIN SELECT * FROM t2 LIMIT ?; END; }
57 7 { BEFORE DELETE ON t1 BEGIN SELECT * FROM t2 ORDER BY ?; END; }
58 8 { BEFORE UPDATE ON t1 BEGIN UPDATE t2 SET c = ?; END; }
59 9 { BEFORE UPDATE ON t1 BEGIN UPDATE t2 SET c = 1 WHERE d = ?; END; }
drh84fbff12018-04-11 16:04:01 +000060 10 { AFTER INSERT ON t1 BEGIN SELECT * FROM pragma_stats(?); END; }
dan46539d72013-10-03 12:29:38 +000061} {
62 catchsql {drop trigger tr1}
63 do_catchsql_test 1.1.$tn "CREATE TRIGGER tr1 $defn" [list 1 $errmsg]
64 do_catchsql_test 1.2.$tn "CREATE TEMP TRIGGER tr1 $defn" [list 1 $errmsg]
65}
66
67#-------------------------------------------------------------------------
68# Test that variable references within trigger definitions loaded from
69# the sqlite_master table are automatically converted to NULL.
70#
drh6ab91a72018-11-07 02:17:01 +000071sqlite3_db_config db DEFENSIVE 0
dan46539d72013-10-03 12:29:38 +000072do_execsql_test 2.1 {
73 PRAGMA writable_schema = 1;
74 INSERT INTO sqlite_master VALUES('trigger', 'tr1', 't1', 0,
75 'CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN
76 INSERT INTO t2 VALUES(?1, ?2);
77 END'
78 );
79
80 INSERT INTO sqlite_master VALUES('trigger', 'tr2', 't3', 0,
81 'CREATE TRIGGER tr2 AFTER INSERT ON t3 WHEN ?1 IS NULL BEGIN
82 UPDATE t2 SET c=d WHERE c IS ?2;
83 END'
84 );
85}
86db close
87sqlite3 db test.db
88
89do_execsql_test 2.2.1 {
90 INSERT INTO t1 VALUES(1, 2);
91 SELECT * FROM t2;
92} {{} {}}
93do_test 2.2.2 {
94 set one 3
95 execsql {
96 DELETE FROM t2;
97 INSERT INTO t1 VALUES($one, ?1);
98 SELECT * FROM t2;
99 }
100} {{} {}}
101do_execsql_test 2.2.3 { SELECT * FROM t1 } {1 2 3 3}
102
103do_execsql_test 2.3 {
104 DELETE FROM t2;
105 INSERT INTO t2 VALUES('x', 'y');
106 INSERT INTO t2 VALUES(NULL, 'z');
107 INSERT INTO t3 VALUES(1, 2);
108 SELECT * FROM t3;
109 SELECT * FROM t2;
110} {1 2 x y z z}
111
112finish_test