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| 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 | |
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