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Annotation of embedaddon/sqlite3/test/tkt2854.test, revision 1.1.1.1

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