| OLD | NEW |
| (Empty) |
| 1 # 2007 April 6 | |
| 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 # This file implements regression tests for SQLite library. The | |
| 12 # focus of this script is database locks. | |
| 13 # | |
| 14 # $Id: lock4.test,v 1.10 2009/05/06 00:52:41 drh Exp $ | |
| 15 | |
| 16 | |
| 17 set testdir [file dirname $argv0] | |
| 18 source $testdir/tester.tcl | |
| 19 | |
| 20 # Initialize the test.db database so that it is non-empty | |
| 21 # | |
| 22 do_test lock4-1.1 { | |
| 23 db eval { | |
| 24 PRAGMA auto_vacuum=OFF; | |
| 25 CREATE TABLE t1(x); | |
| 26 } | |
| 27 file delete -force test2.db test2.db-journal | |
| 28 sqlite3 db2 test2.db | |
| 29 db2 eval { | |
| 30 PRAGMA auto_vacuum=OFF; | |
| 31 CREATE TABLE t2(x) | |
| 32 } | |
| 33 db2 close | |
| 34 list [file size test.db] [file size test2.db] | |
| 35 } {2048 2048} | |
| 36 | |
| 37 # Create a script to drive a separate process that will | |
| 38 # | |
| 39 # 1. Create a second database test2.db | |
| 40 # 2. Get an exclusive lock on test2.db | |
| 41 # 3. Add an entry to test.db in table t1, waiting as necessary. | |
| 42 # 4. Commit the change to test2.db. | |
| 43 # | |
| 44 # Meanwhile, this process will: | |
| 45 # | |
| 46 # A. Get an exclusive lock on test.db | |
| 47 # B. Attempt to read from test2.db but get an SQLITE_BUSY error. | |
| 48 # C. Commit the changes to test.db thus alloing the other process | |
| 49 # to continue. | |
| 50 # | |
| 51 do_test lock4-1.2 { | |
| 52 | |
| 53 # Create a script for the second process to run. | |
| 54 # | |
| 55 set out [open test2-script.tcl w] | |
| 56 puts $out "sqlite3_test_control_pending_byte [set sqlite_pending_byte]" | |
| 57 puts $out { | |
| 58 sqlite3 db2 test2.db | |
| 59 db2 eval { | |
| 60 BEGIN; | |
| 61 INSERT INTO t2 VALUES(2); | |
| 62 } | |
| 63 sqlite3 db test.db | |
| 64 db timeout 1000000 | |
| 65 db eval { | |
| 66 INSERT INTO t1 VALUES(2); | |
| 67 } | |
| 68 db close | |
| 69 db2 eval COMMIT | |
| 70 exit | |
| 71 } | |
| 72 close $out | |
| 73 | |
| 74 # Begin a transaction on test.db. | |
| 75 db eval { | |
| 76 BEGIN EXCLUSIVE; | |
| 77 INSERT INTO t1 VALUES(1); | |
| 78 } | |
| 79 | |
| 80 # Kick off the second process. | |
| 81 exec [info nameofexec] ./test2-script.tcl & | |
| 82 | |
| 83 # Wait until the second process has started its transaction on test2.db. | |
| 84 while {![file exists test2.db-journal]} { | |
| 85 after 10 | |
| 86 } | |
| 87 | |
| 88 # Try to write to test2.db. We are locked out. | |
| 89 sqlite3 db2 test2.db | |
| 90 catchsql { | |
| 91 INSERT INTO t2 VALUES(1) | |
| 92 } db2 | |
| 93 } {1 {database is locked}} | |
| 94 do_test lock4-1.3 { | |
| 95 db eval { | |
| 96 COMMIT; | |
| 97 } | |
| 98 while {[file exists test2.db-journal]} { | |
| 99 after 10 | |
| 100 } | |
| 101 # The other process has committed its transaction on test2.db by | |
| 102 # deleting the journal file. But it might retain the lock for a | |
| 103 # fraction longer | |
| 104 # | |
| 105 after 25 | |
| 106 db2 eval { | |
| 107 SELECT * FROM t2 | |
| 108 } | |
| 109 } {2} | |
| 110 | |
| 111 | |
| 112 do_test lock4-999.1 { | |
| 113 rename db2 {} | |
| 114 } {} | |
| 115 | |
| 116 finish_test | |
| OLD | NEW |