1# 2007 Oct 3 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 is to test that ticket #2767 has been fixed. 13# Ticket #2767 is for a VDBE stack overflow on BEFORE 14# triggers that run RAISE(IGNORE). 15# 16# $Id: tkt2767.test,v 1.3 2009/04/07 14:14:23 danielk1977 Exp $ 17# 18 19set testdir [file dirname $argv0] 20source $testdir/tester.tcl 21 22ifcapable !trigger { finish_test ; return } 23 24do_test tkt2767-1.1 { 25 execsql { 26 -- Construct a table with many rows of data 27 CREATE TABLE t1(x); 28 INSERT INTO t1 VALUES(1); 29 INSERT INTO t1 VALUES(2); 30 INSERT INTO t1 SELECT x+2 FROM t1; 31 INSERT INTO t1 SELECT x+4 FROM t1; 32 INSERT INTO t1 SELECT x+8 FROM t1; 33 INSERT INTO t1 SELECT x+16 FROM t1; 34 35 -- BEFORE triggers that invoke raise(ignore). The effect of 36 -- these triggers should be to make INSERTs, UPDATEs, and DELETEs 37 -- into no-ops. 38 CREATE TRIGGER r1 BEFORE UPDATE ON t1 BEGIN 39 SELECT raise(ignore); 40 END; 41 CREATE TRIGGER r2 BEFORE DELETE ON t1 BEGIN 42 SELECT raise(ignore); 43 END; 44 CREATE TRIGGER r3 BEFORE INSERT ON t1 BEGIN 45 SELECT raise(ignore); 46 END; 47 48 -- Verify the table content 49 SELECT count(*), sum(x) FROM t1; 50 } 51} {32 528} 52 53# Try to delete all elements of the table. This will invoke the 54# DELETE trigger 32 times, which should overflow the VDBE stack if 55# the problem of #2767 is not fixed. If the problem is fixed, all 56# the deletes should be no-ops so the table should remain unchanged. 57# 58do_test tkt2767-1.2 { 59 execsql { 60 DELETE FROM t1 WHERE x>0; 61 SELECT count(*), sum(x) FROM t1; 62 } 63} {32 528} 64 65# Try to update all elements of the table. This will invoke the 66# UPDATE trigger 32 times, which should overflow the VDBE stack if 67# the problem of #2767 is not fixed. If the problem is fixed, all 68# the updates should be no-ops so the table should remain unchanged. 69# 70do_test tkt2767-1.3 { 71 execsql { 72 UPDATE t1 SET x=x+1; 73 SELECT count(*), sum(x) FROM t1; 74 } 75} {32 528} 76 77# Invoke the insert trigger. The insert trigger was working 78# even prior to the fix of #2767. But it seems good to go ahead 79# and verify that it works. 80# 81do_test tkt2767-1.4 { 82 execsql { 83 INSERT INTO t1 SELECT x+32 FROM t1; 84 SELECT count(*), sum(x) FROM t1; 85 } 86} {32 528} 87 88 89 90finish_test 91