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1 # 2007 Dec 12 |
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2 # |
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3 # The author disclaims copyright to this source code. In place of |
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4 # a legal notice, here is a blessing: |
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5 # |
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6 # May you do good and not evil. |
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7 # May you find forgiveness for yourself and forgive others. |
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8 # May you share freely, never taking more than you give. |
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9 # |
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10 #*********************************************************************** |
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11 # |
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12 # This file contains test cases for stressing database |
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13 # changes that involve side effects that delete rows from |
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14 # the table being changed. Ticket #2832 shows that in |
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15 # older versions of SQLite that behavior was implemented |
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16 # incorrectly and resulted in corrupt database files. |
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17 # |
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18 # $Id: sidedelete.test,v 1.2 2008/08/04 03:51:24 danielk1977 Exp $ |
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19 # |
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20 |
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21 set testdir [file dirname $argv0] |
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22 source $testdir/tester.tcl |
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23 |
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24 # The sequence table is created to store a sequence of integers |
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25 # starting with 1. This is used to reinitialize other tables |
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26 # as part of other tests. |
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27 # |
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28 do_test sidedelete-1.1 { |
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29 execsql { |
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30 CREATE TABLE sequence(a INTEGER PRIMARY KEY); |
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31 INSERT INTO sequence VALUES(1); |
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32 INSERT INTO sequence VALUES(2); |
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33 } |
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34 for {set i 0} {$i<8} {incr i} { |
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35 execsql { |
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36 INSERT INTO sequence SELECT a+(SELECT max(a) FROM sequence) FROM sequence; |
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37 } |
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38 } |
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39 execsql {SELECT count(*) FROM sequence} |
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40 } {512} |
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41 |
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42 # Make a series of changes using an UPDATE OR REPLACE and a |
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43 # correlated subquery. This would cause database corruption |
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44 # prior to the fix for ticket #2832. |
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45 # |
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46 do_test sidedelete-2.0 { |
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47 execsql { |
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48 CREATE TABLE t1(a PRIMARY KEY, b); |
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49 CREATE TABLE chng(a PRIMARY KEY, b); |
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50 SELECT count(*) FROM t1; |
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51 SELECT count(*) FROM chng; |
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52 } |
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53 } {0 0} |
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54 for {set i 2} {$i<=100} {incr i} { |
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55 set n [expr {($i+2)/2}] |
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56 do_test sidedelete-2.$i.1 { |
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57 execsql { |
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58 DELETE FROM t1; |
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59 INSERT INTO t1 SELECT a, a FROM sequence WHERE a<=$i; |
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60 DELETE FROM chng; |
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61 INSERT INTO chng SELECT a*2, a*2+1 FROM sequence WHERE a<=$i/2; |
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62 UPDATE OR REPLACE t1 SET a=(SELECT b FROM chng WHERE a=t1.a); |
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63 SELECT count(*), sum(a) FROM t1; |
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64 } |
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65 } [list $n [expr {$n*$n-1}]] |
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66 integrity_check sidedelete-2.$i.2 |
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67 } |
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68 |
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69 # This will cause stacks leaks but not database corruption prior |
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70 # to the #2832 fix. |
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71 # |
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72 do_test sidedelete-3.0 { |
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73 execsql { |
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74 DROP TABLE t1; |
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75 CREATE TABLE t1(a PRIMARY KEY); |
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76 SELECT * FROM t1; |
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77 } |
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78 } {} |
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79 for {set i 1} {$i<=100} {incr i} { |
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80 set n [expr {($i+1)/2}] |
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81 do_test sidedelete-3.$i.1 { |
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82 execsql { |
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83 DELETE FROM t1; |
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84 INSERT INTO t1 SELECT a FROM sequence WHERE a<=$i; |
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85 UPDATE OR REPLACE t1 SET a=a+1; |
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86 SELECT count(*), sum(a) FROM t1; |
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87 } |
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88 } [list $n [expr {$n*($n+1)}]] |
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89 integrity_check sidedelete-3.$i.2 |
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90 } |
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91 |
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92 finish_test |