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# 2009 December 29
#
# The author disclaims copyright to this source code. In place of
# a legal notice', here is a blessing:
#
# May you do good and not evil.
# May you find forgiveness for yourself and forgive others.
# May you share freely, never taking more than you give.
#
#***********************************************************************
#
# This file tests the effects of SQL variable references embedded in
# triggers. If the user attempts to create such a trigger, it is an
# error. However, if an existing trigger definition is read from
# the sqlite_master table, the variable reference always evaluates
# to NULL.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
ifcapable {!trigger} {
finish_test
return
}
set testprefix triggerE
do_execsql_test 1.0 {
CREATE TABLE t1(a, b);
CREATE TABLE t2(c, d);
CREATE TABLE t3(e, f);
}
# forcedelete test.db2
# do_execsql_test 1.1 {
# ATTACH 'test.db2' AS aux;
# CREATE TABLE aux.t4(x);
# INSERT INTO aux.t4 VALUES(5);
#
# CREATE TRIGGER tr1 AFTER INSERT ON t1 WHEN new.a IN (SELECT x FROM aux.t4)
# BEGIN
# SELECT 1;
# END;
# }
# do_execsql_test 1.2 { INSERT INTO t1 VALUES(1,1); }
# do_execsql_test 1.3 { INSERT INTO t1 VALUES(5,5); }
#-------------------------------------------------------------------------
# Attempt to create various triggers that use bound variables.
#
set errmsg "trigger cannot use variables"
foreach {tn defn} {
1 { AFTER INSERT ON t1 WHEN new.a = ? BEGIN SELECT 1; END; }
2 { BEFORE DELETE ON t1 BEGIN SELECT ?; END; }
3 { BEFORE DELETE ON t1 BEGIN SELECT * FROM (SELECT * FROM (SELECT ?)); END; }
5 { BEFORE DELETE ON t1 BEGIN SELECT * FROM t2 GROUP BY ?; END; }
6 { BEFORE DELETE ON t1 BEGIN SELECT * FROM t2 LIMIT ?; END; }
7 { BEFORE DELETE ON t1 BEGIN SELECT * FROM t2 ORDER BY ?; END; }
8 { BEFORE UPDATE ON t1 BEGIN UPDATE t2 SET c = ?; END; }
9 { BEFORE UPDATE ON t1 BEGIN UPDATE t2 SET c = 1 WHERE d = ?; END; }
} {
catchsql {drop trigger tr1}
do_catchsql_test 1.1.$tn "CREATE TRIGGER tr1 $defn" [list 1 $errmsg]
do_catchsql_test 1.2.$tn "CREATE TEMP TRIGGER tr1 $defn" [list 1 $errmsg]
}
#-------------------------------------------------------------------------
# Test that variable references within trigger definitions loaded from
# the sqlite_master table are automatically converted to NULL.
#
do_execsql_test 2.1 {
PRAGMA writable_schema = 1;
INSERT INTO sqlite_master VALUES('trigger', 'tr1', 't1', 0,
'CREATE TRIGGER tr1 AFTER INSERT ON t1 BEGIN
INSERT INTO t2 VALUES(?1, ?2);
END'
);
INSERT INTO sqlite_master VALUES('trigger', 'tr2', 't3', 0,
'CREATE TRIGGER tr2 AFTER INSERT ON t3 WHEN ?1 IS NULL BEGIN
UPDATE t2 SET c=d WHERE c IS ?2;
END'
);
}
db close
sqlite3 db test.db
do_execsql_test 2.2.1 {
INSERT INTO t1 VALUES(1, 2);
SELECT * FROM t2;
} {{} {}}
do_test 2.2.2 {
set one 3
execsql {
DELETE FROM t2;
INSERT INTO t1 VALUES($one, ?1);
SELECT * FROM t2;
}
} {{} {}}
do_execsql_test 2.2.3 { SELECT * FROM t1 } {1 2 3 3}
do_execsql_test 2.3 {
DELETE FROM t2;
INSERT INTO t2 VALUES('x', 'y');
INSERT INTO t2 VALUES(NULL, 'z');
INSERT INTO t3 VALUES(1, 2);
SELECT * FROM t3;
SELECT * FROM t2;
} {1 2 x y z z}
finish_test
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