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