wasCSharpSQLite – Blame information for rev 7
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1 | office | 1 | # 2007 December 20 |
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 | # $Id: tkt2854.test,v 1.4 2009/03/16 13:19:36 danielk1977 Exp $ |
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13 | |||
14 | set testdir [file dirname $argv0] |
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15 | source $testdir/tester.tcl |
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16 | db close |
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17 | |||
18 | ifcapable !shared_cache { |
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19 | finish_test |
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20 | return |
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21 | } |
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22 | |||
23 | set ::enable_shared_cache [sqlite3_enable_shared_cache 1] |
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24 | |||
25 | # Open 3 database connections. Connection "db" and "db2" share a cache. |
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26 | # Connection "db3" has its own cache. |
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27 | # |
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28 | do_test tkt2854-1.1 { |
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29 | sqlite3 db test.db |
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30 | sqlite3 db2 test.db |
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31 | |||
32 | # This is taken from shared.test. The Windows VFS expands |
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33 | # ./test.db (and test.db) to be the same thing so the path |
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34 | # matches and they share a cache. By changing the case |
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35 | # for Windows platform, we get around this and get a separate |
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36 | # connection. |
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37 | if {$::tcl_platform(platform)=="unix"} { |
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38 | sqlite3 db3 ./test.db |
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39 | } else { |
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40 | sqlite3 db3 TEST.DB |
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41 | } |
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42 | |||
43 | db eval { |
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44 | CREATE TABLE abc(a, b, c); |
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45 | } |
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46 | } {} |
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47 | |||
48 | # Check that an exclusive lock cannot be obtained if some other |
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49 | # shared-cache connection has a read-lock on a table. |
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50 | # |
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51 | do_test tkt2854-1.2 { |
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52 | execsql { |
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53 | BEGIN; |
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54 | SELECT * FROM abc; |
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55 | } db2 |
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56 | } {} |
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57 | do_test tkt2854-1.3 { |
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58 | catchsql { BEGIN EXCLUSIVE } db |
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59 | } {1 {database table is locked}} |
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60 | do_test tkt2854-1.4 { |
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61 | execsql { SELECT * FROM abc } db3 |
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62 | } {} |
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63 | do_test tkt2854-1.5 { |
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64 | catchsql { INSERT INTO abc VALUES(1, 2, 3) } db3 |
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65 | } {1 {database is locked}} |
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66 | do_test tkt2854-1.6 { |
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67 | execsql { COMMIT } db2 |
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68 | } {} |
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69 | |||
70 | # Check that an exclusive lock prevents other shared-cache users from |
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71 | # starting a transaction. |
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72 | # |
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73 | do_test tkt2854-1.7 { |
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74 | set ::DB2 [sqlite3_connection_pointer db2] |
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75 | set ::STMT1 [sqlite3_prepare $DB2 "SELECT * FROM abc" -1 TAIL] |
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76 | set ::STMT2 [sqlite3_prepare $DB2 "BEGIN EXCLUSIVE" -1 TAIL] |
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77 | set ::STMT3 [sqlite3_prepare $DB2 "BEGIN IMMEDIATE" -1 TAIL] |
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78 | set ::STMT4 [sqlite3_prepare $DB2 "BEGIN" -1 TAIL] |
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79 | set ::STMT5 [sqlite3_prepare $DB2 "COMMIT" -1 TAIL] |
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80 | execsql { BEGIN EXCLUSIVE } db |
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81 | } {} |
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82 | do_test tkt2854-1.8 { |
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83 | catchsql { BEGIN EXCLUSIVE } db2 |
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84 | } {1 {database schema is locked: main}} |
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85 | do_test tkt2854-1.9 { |
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86 | catchsql { BEGIN IMMEDIATE } db2 |
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87 | } {1 {database schema is locked: main}} |
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88 | do_test tkt2854-1.10 { |
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89 | # This fails because the schema of main cannot be verified. |
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90 | catchsql { BEGIN } db2 |
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91 | } {1 {database schema is locked: main}} |
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92 | |||
93 | # Check that an exclusive lock prevents other shared-cache users from |
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94 | # reading the database. Use stored statements so that the error occurs |
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95 | # at the b-tree level, not the schema level. |
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96 | # |
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97 | do_test tkt2854-1.11 { |
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98 | list [sqlite3_step $::STMT1] [sqlite3_finalize $::STMT1] |
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99 | } {SQLITE_ERROR SQLITE_LOCKED} |
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100 | do_test tkt2854-1.12 { |
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101 | list [sqlite3_step $::STMT2] [sqlite3_finalize $::STMT2] |
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102 | } {SQLITE_ERROR SQLITE_LOCKED} |
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103 | do_test tkt2854-1.13 { |
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104 | list [sqlite3_step $::STMT3] [sqlite3_finalize $::STMT3] |
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105 | } {SQLITE_ERROR SQLITE_LOCKED} |
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106 | do_test tkt2854-1.14 { |
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107 | # A regular "BEGIN" doesn't touch any databases. So it succeeds. |
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108 | list [sqlite3_step $::STMT4] [sqlite3_finalize $::STMT4] |
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109 | } {SQLITE_DONE SQLITE_OK} |
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110 | do_test tkt2854-1.15 { |
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111 | # As does a COMMIT. |
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112 | list [sqlite3_step $::STMT5] [sqlite3_finalize $::STMT5] |
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113 | } {SQLITE_DONE SQLITE_OK} |
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114 | |||
115 | # Try to read the database using connection "db3" (which does not share |
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116 | # a cache with "db"). The database should be locked. |
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117 | do_test tkt2854-1.16 { |
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118 | catchsql { SELECT * FROM abc } db3 |
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119 | } {1 {database is locked}} |
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120 | do_test tkt2854-1.17 { |
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121 | execsql { COMMIT } db |
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122 | } {} |
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123 | do_test tkt2854-1.18 { |
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124 | execsql { SELECT * FROM abc } db2 |
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125 | } {} |
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126 | |||
127 | # Check that if an attempt to obtain an exclusive lock fails because an |
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128 | # attached db cannot be locked, the internal exclusive flag used by |
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129 | # shared-cache users is correctly cleared. |
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130 | do_test tkt2854-1.19 { |
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131 | file delete -force test2.db test2.db-journal |
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132 | sqlite3 db4 test2.db |
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133 | execsql { CREATE TABLE def(d, e, f) } db4 |
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134 | execsql { ATTACH 'test2.db' AS aux } db |
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135 | } {} |
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136 | do_test tkt2854-1.20 { |
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137 | execsql {BEGIN IMMEDIATE} db4 |
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138 | catchsql {BEGIN EXCLUSIVE} db |
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139 | } {1 {database table is locked}} |
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140 | do_test tkt2854-1.21 { |
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141 | execsql {SELECT * FROM abc} db2 |
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142 | } {} |
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143 | |||
144 | db close |
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145 | db2 close |
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146 | db3 close |
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147 | db4 close |
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148 | sqlite3_enable_shared_cache $::enable_shared_cache |
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149 | finish_test |