github.com/jdgcs/sqlite3@v1.12.1-0.20210908114423-bc5f96e4dd51/testdata/tcl/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   && [atomic_batch_write test.db]==0
    87  } {
    88    do_test rollback-2.1 {
    89      execsql {
    90        BEGIN;
    91        INSERT INTO t3 VALUES('hello world');
    92      }
    93      forcecopy test.db testA.db
    94      forcecopy test.db-journal testA.db-journal
    95      execsql {
    96        COMMIT;
    97      }
    98    } {}
    99  
   100    # At this point files testA.db and testA.db-journal are present in the
   101    # file system. This block adds a master-journal file pointer to the
   102    # end of testA.db-journal. The master-journal file does not exist.
   103    # 
   104    set mj [file normalize testA.db-mj-123]
   105    binary scan $mj c* a
   106    set cksum 0
   107    foreach i $a { incr cksum $i }
   108    set mj_pgno [expr $sqlite_pending_byte / 1024]
   109    set zAppend [binary format Ia*IIa8 $mj_pgno $mj [string length $mj] $cksum \
   110      "\xd9\xd5\x05\xf9\x20\xa1\x63\xd7"
   111    ]
   112    set iOffset [expr (([file size testA.db-journal] + 511)/512)*512]
   113    set fd [open testA.db-journal a+]
   114    fconfigure $fd -encoding binary -translation binary
   115    seek $fd $iOffset
   116    puts -nonewline $fd $zAppend
   117  
   118    # Also, fix the first journal-header in the journal-file. Because the
   119    # journal file has not yet been synced, the 8-byte magic string at the
   120    # start of the first journal-header has not been written by SQLite.
   121    # So write it now.
   122    seek $fd 0
   123    puts -nonewline $fd "\xd9\xd5\x05\xf9\x20\xa1\x63\xd7"
   124    close $fd
   125  
   126    # Open a handle on testA.db and use it to query the database. At one
   127    # point the first query would attempt a hot rollback, attempt to open
   128    # the master-journal file and return SQLITE_CANTOPEN when it could not
   129    # be opened. This is incorrect, it should simply delete the journal
   130    # file and proceed with the query.
   131    # 
   132    do_test rollback-2.2 {
   133      sqlite3 db2 testA.db
   134      execsql {
   135        SELECT distinct tbl_name FROM sqlite_master;
   136      } db2
   137    } {t1 t3}
   138    if {[lsearch {exclusive persistent_journal no_journal} [permutation]]<0} {
   139      do_test rollback-2.3 {
   140        file exists testA.db-journal
   141      } 0
   142    }
   143    do_test rollback-2.4 {
   144      execsql {
   145        SELECT distinct tbl_name FROM sqlite_master;
   146      } db2
   147    } {t1 t3}
   148  
   149    db2 close
   150  }
   151  
   152  finish_test