# 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