modernc.org/cc@v1.0.1/v2/testdata/_sqlite/test/rollback.test (about)

     1  # 2004 June 30
     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 file is verifying that a rollback in one statement
    13  # caused by an ON CONFLICT ROLLBACK clause aborts any other pending
    14  # statements.
    15  #
    16  # $Id: rollback.test,v 1.11 2009/06/26 07:12:07 danielk1977 Exp $
    17  
    18  set testdir [file dirname $argv0]
    19  source $testdir/tester.tcl
    20  
    21  set DB [sqlite3_connection_pointer db]
    22  
    23  do_test rollback-1.1 {
    24    execsql {
    25      CREATE TABLE t1(a);
    26      INSERT INTO t1 VALUES(1);
    27      INSERT INTO t1 VALUES(2);
    28      INSERT INTO t1 VALUES(3);
    29      INSERT INTO t1 VALUES(4);
    30      SELECT * FROM t1;
    31    }
    32  } {1 2 3 4}
    33  
    34  ifcapable conflict {
    35    do_test rollback-1.2 {
    36      execsql {
    37        CREATE TABLE t3(a unique on conflict rollback);
    38        INSERT INTO t3 SELECT a FROM t1;
    39        BEGIN;
    40        INSERT INTO t1 SELECT * FROM t1;
    41      }
    42    } {}
    43  }
    44  do_test rollback-1.3 {
    45    set STMT [sqlite3_prepare $DB "SELECT a FROM t1" -1 TAIL]
    46    sqlite3_step $STMT
    47  } {SQLITE_ROW}
    48  
    49  ifcapable conflict {
    50    # This causes a ROLLBACK, which deletes the table out from underneath the
    51    # SELECT statement.
    52    #
    53    do_test rollback-1.4 {
    54      catchsql {
    55        INSERT INTO t3 SELECT a FROM t1;
    56      }
    57    } {1 {UNIQUE constraint failed: t3.a}}
    58    
    59    # Try to continue with the SELECT statement
    60    #
    61    do_test rollback-1.5 {
    62      sqlite3_step $STMT
    63    } {SQLITE_ROW}
    64  
    65    # Restart the SELECT statement
    66    #
    67    do_test rollback-1.6 { sqlite3_reset $STMT } {SQLITE_OK}
    68  } else {
    69    do_test rollback-1.6 { sqlite3_reset $STMT } {SQLITE_OK}
    70  }
    71  
    72  do_test rollback-1.7 {
    73    sqlite3_step $STMT
    74  } {SQLITE_ROW}
    75  do_test rollback-1.8 {
    76    sqlite3_step $STMT
    77  } {SQLITE_ROW}
    78  do_test rollback-1.9 {
    79    sqlite3_finalize $STMT
    80  } {SQLITE_OK}
    81  
    82  if {$tcl_platform(platform) == "unix" 
    83   && [permutation] ne "onefile"
    84   && [permutation] ne "inmemory_journal"
    85   && [permutation] ne "atomic-batch-write"
    86  } {
    87    do_test rollback-2.1 {
    88      execsql {
    89        BEGIN;
    90        INSERT INTO t3 VALUES('hello world');
    91      }
    92      forcecopy test.db testA.db
    93      forcecopy test.db-journal testA.db-journal
    94      execsql {
    95        COMMIT;
    96      }
    97    } {}
    98  
    99    # At this point files testA.db and testA.db-journal are present in the
   100    # file system. This block adds a master-journal file pointer to the
   101    # end of testA.db-journal. The master-journal file does not exist.
   102    # 
   103    set mj [file normalize testA.db-mj-123]
   104    binary scan $mj c* a
   105    set cksum 0
   106    foreach i $a { incr cksum $i }
   107    set mj_pgno [expr $sqlite_pending_byte / 1024]
   108    set zAppend [binary format Ia*IIa8 $mj_pgno $mj [string length $mj] $cksum \
   109      "\xd9\xd5\x05\xf9\x20\xa1\x63\xd7"
   110    ]
   111    set iOffset [expr (([file size testA.db-journal] + 511)/512)*512]
   112    set fd [open testA.db-journal a+]
   113    fconfigure $fd -encoding binary -translation binary
   114    seek $fd $iOffset
   115    puts -nonewline $fd $zAppend
   116  
   117    # Also, fix the first journal-header in the journal-file. Because the
   118    # journal file has not yet been synced, the 8-byte magic string at the
   119    # start of the first journal-header has not been written by SQLite.
   120    # So write it now.
   121    seek $fd 0
   122    puts -nonewline $fd "\xd9\xd5\x05\xf9\x20\xa1\x63\xd7"
   123    close $fd
   124  
   125    # Open a handle on testA.db and use it to query the database. At one
   126    # point the first query would attempt a hot rollback, attempt to open
   127    # the master-journal file and return SQLITE_CANTOPEN when it could not
   128    # be opened. This is incorrect, it should simply delete the journal
   129    # file and proceed with the query.
   130    # 
   131    do_test rollback-2.2 {
   132      sqlite3 db2 testA.db
   133      execsql {
   134        SELECT distinct tbl_name FROM sqlite_master;
   135      } db2
   136    } {t1 t3}
   137    if {[lsearch {exclusive persistent_journal no_journal} [permutation]]<0} {
   138      do_test rollback-2.3 {
   139        file exists testA.db-journal
   140      } 0
   141    }
   142    do_test rollback-2.4 {
   143      execsql {
   144        SELECT distinct tbl_name FROM sqlite_master;
   145      } db2
   146    } {t1 t3}
   147  
   148    db2 close
   149  }
   150  
   151  finish_test