1 # 2007 Dec 12 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 contains test cases for stressing database 13 # changes that involve side effects that delete rows from 14 # the table being changed. Ticket #2832 shows that in 15 # older versions of SQLite that behavior was implemented 16 # incorrectly and resulted in corrupt database files. 17 # 18 # $Id: sidedelete.test,v 1.2 2008/08/04 03:51:24 danielk1977 Exp $ 19 # 20 21 set testdir [file dirname $argv0] 22 source $testdir/tester.tcl 23 24 # The sequence table is created to store a sequence of integers 25 # starting with 1. This is used to reinitialize other tables 26 # as part of other tests. 27 # 28 do_test sidedelete-1.1 { 29 execsql { 30 CREATE TABLE sequence(a INTEGER PRIMARY KEY); 31 INSERT INTO sequence VALUES(1); 32 INSERT INTO sequence VALUES(2); 33 } 34 for {set i 0} {$i<8} {incr i} { 35 execsql { 36 INSERT INTO sequence SELECT a+(SELECT max(a) FROM sequence) FROM sequence; 37 } 38 } 39 execsql {SELECT count(*) FROM sequence} 40 } {512} 41 42 # Make a series of changes using an UPDATE OR REPLACE and a 43 # correlated subquery. This would cause database corruption 44 # prior to the fix for ticket #2832. 45 # 46 do_test sidedelete-2.0 { 47 execsql { 48 CREATE TABLE t1(a PRIMARY KEY, b); 49 CREATE TABLE chng(a PRIMARY KEY, b); 50 SELECT count(*) FROM t1; 51 SELECT count(*) FROM chng; 52 } 53 } {0 0} 54 for {set i 2} {$i<=100} {incr i} { 55 set n [expr {($i+2)/2}] 56 do_test sidedelete-2.$i.1 { 57 execsql { 58 DELETE FROM t1; 59 INSERT INTO t1 SELECT a, a FROM sequence WHERE a<=$i; 60 DELETE FROM chng; 61 INSERT INTO chng SELECT a*2, a*2+1 FROM sequence WHERE a<=$i/2; 62 UPDATE OR REPLACE t1 SET a=(SELECT b FROM chng WHERE a=t1.a); 63 SELECT count(*), sum(a) FROM t1; 64 } 65 } [list $n [expr {$n*$n-1}]] 66 integrity_check sidedelete-2.$i.2 67 } 68 69 # This will cause stacks leaks but not database corruption prior 70 # to the #2832 fix. 71 # 72 do_test sidedelete-3.0 { 73 execsql { 74 DROP TABLE t1; 75 CREATE TABLE t1(a PRIMARY KEY); 76 SELECT * FROM t1; 77 } 78 } {} 79 for {set i 1} {$i<=100} {incr i} { 80 set n [expr {($i+1)/2}] 81 do_test sidedelete-3.$i.1 { 82 execsql { 83 DELETE FROM t1; 84 INSERT INTO t1 SELECT a FROM sequence WHERE a<=$i; 85 UPDATE OR REPLACE t1 SET a=a+1; 86 SELECT count(*), sum(a) FROM t1; 87 } 88 } [list $n [expr {$n*($n+1)}]] 89 integrity_check sidedelete-3.$i.2 90 } 91 92 finish_test 93
