gitlab.com/CoiaPrant/sqlite3@v1.19.1/testdata/tcl/notify3.test (about)

     1  # 2010 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 testing the sqlite3_unlock_notify() API.
    13  #
    14  
    15  set testdir [file dirname $argv0]
    16  source $testdir/tester.tcl
    17  
    18  # This script only runs if shared-cache and unlock-notify are available.
    19  #
    20  ifcapable !unlock_notify||!shared_cache { 
    21    finish_test 
    22    return 
    23  }
    24  
    25  set esc [sqlite3_enable_shared_cache 1]
    26  
    27  sqlite3 db  test.db
    28  forcedelete test.db2 test.db2-journal test.db2-wal
    29  sqlite3 db2 test.db2
    30  
    31  do_test notify3-1.1 {
    32    execsql { 
    33      CREATE TABLE t1(a, b); 
    34      INSERT INTO t1 VALUES('t1 A', 't1 B');
    35    }
    36  } {}
    37  do_test notify3-1.2 {
    38    execsql { 
    39      CREATE TABLE t2(a, b);
    40      INSERT INTO t2 VALUES('t2 A', 't2 B');
    41    } db2
    42  } {}
    43  
    44  do_test notify3-1.3 {
    45    execsql { 
    46      BEGIN EXCLUSIVE;
    47      INSERT INTO t2 VALUES('t2 C', 't2 D');
    48    } db2
    49  } {}
    50  do_test notify3-1.4 {
    51    catchsql { ATTACH 'test.db2' AS aux }
    52  } {0 {}}
    53  
    54  do_test notify3-1.5 {
    55    catchsql { SELECT * FROM t2 }
    56  } {1 {database schema is locked: aux}}
    57  
    58  do_test notify3-1.6 {
    59    list [sqlite3_errcode db] [sqlite3_extended_errcode db]
    60  } {SQLITE_LOCKED SQLITE_LOCKED_SHAREDCACHE}
    61  
    62  do_test notify3-1.7 {
    63    sqlite3_extended_result_codes db 1
    64    catch { set ::stmt [sqlite3_prepare_v2 db "SELECT * FROM t2" -1 tail] } msg
    65    set msg
    66  } {(262) database schema is locked: aux}
    67  
    68  do_test notify3-1.8 {
    69    set ::when 1
    70    db unlock_notify { set ::res $::when }
    71    set ::when 2
    72    execsql { COMMIT } db2
    73    set ::res
    74  } {2}
    75  do_test notify3-1.9 {
    76    catchsql { SELECT * FROM t2 }
    77  } {0 {{t2 A} {t2 B} {t2 C} {t2 D}}}
    78  db close
    79  
    80  
    81  set err   {{1 {unable to open database: test.db2}}}
    82  set noerr {{0 {}}}
    83  
    84  # When a new database is attached, the connection doing the attaching 
    85  # tries to load any unloaded schemas for both the new database and any
    86  # already attached databases (including the main database). If it is
    87  # unable to load any such schemas, then the ATTACH statement fails.
    88  #
    89  # This block tests that if the loading of schemas as a result of an
    90  # ATTACH fails due to locks on the schema table held by other shared-cache
    91  # connections the extended error code is SQLITE_LOCKED_SHAREDCACHE and
    92  # it is possible to use the unlock-notify mechanism to determine when
    93  # the ATTACH might succeed.
    94  #
    95  # This test does not work for test-permutations that specify SQL to
    96  # be executed as part of the [sqlite3] command that opens the database.
    97  # Executing such SQL causes SQLite to load the database schema into memory 
    98  # earlier than expected, causing test cases to fail.
    99  #
   100  if {[presql] == ""} {
   101    foreach {
   102      tn
   103      db1_loaded
   104      db2_loaded
   105      enable_extended_errors
   106      result
   107      error1 error2
   108    } "
   109      0   0 0 0   $err     SQLITE_LOCKED               SQLITE_LOCKED_SHAREDCACHE
   110      1   0 0 1   $err     SQLITE_LOCKED_SHAREDCACHE   SQLITE_LOCKED_SHAREDCACHE
   111      2   0 1 0   $err     SQLITE_LOCKED               SQLITE_LOCKED_SHAREDCACHE
   112      3   0 1 1   $err     SQLITE_LOCKED_SHAREDCACHE   SQLITE_LOCKED_SHAREDCACHE
   113      4   1 0 0   $err     SQLITE_LOCKED               SQLITE_LOCKED_SHAREDCACHE
   114      5   1 0 1   $err     SQLITE_LOCKED_SHAREDCACHE   SQLITE_LOCKED_SHAREDCACHE
   115      6   1 1 0   $noerr   SQLITE_OK                   SQLITE_OK
   116      7   1 1 1   $noerr   SQLITE_OK                   SQLITE_OK
   117    " {
   118    
   119      do_test notify3-2.$tn.1 {
   120        catch { db1 close }
   121        catch { db2 close }
   122        sqlite3 db1 test.db
   123        sqlite3 db2 test.db2
   124    
   125        sqlite3_extended_result_codes db1 $enable_extended_errors
   126        sqlite3_extended_result_codes db2 $enable_extended_errors
   127    
   128        if { $db1_loaded } { db1 eval "SELECT * FROM sqlite_master" }
   129        if { $db2_loaded } { db2 eval "SELECT * FROM sqlite_master" }
   130    
   131        db2 eval "BEGIN EXCLUSIVE"
   132        catchsql "ATTACH 'test.db2' AS two" db1
   133      } $result
   134    
   135      do_test notify3-2.$tn.2 {
   136        list [sqlite3_errcode db1] [sqlite3_extended_errcode db1]
   137      } [list $error1 $error2]
   138    
   139      do_test notify3-2.$tn.3 {
   140        db1 unlock_notify {set invoked 1}
   141        set invoked 0
   142        db2 eval commit
   143        set invoked
   144      } [lindex $result 0]
   145    }
   146  }
   147  catch { db1 close }
   148  catch { db2 close }
   149  
   150  
   151  sqlite3_enable_shared_cache $esc
   152  finish_test