Annotation of embedaddon/sqlite3/test/tkt2854.test, revision 1.1
1.1 ! misho 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: forcedelete 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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