Apply [b9b11855e8] (the alternate fix to [fc62af4523]) to the trunk.

FossilOrigin-Name: 9a949a3a5c32b8bfbb94e10e18d050ec80a25553

manifest

@@ -1,8 +1,5 @@
------BEGIN PGP SIGNED MESSAGE-----
+C Apply\s[b9b11855e8]\s(the\salternate\sfix\sto\s[fc62af4523])\sto\sthe\strunk.
-Hash: SHA1
+D 2010-06-17T17:05:54
-
-C Fix\sthe\stkt-fc62af4523.test\sto\swork\saround\snon-randomness\sof\sthe\nrandomblob()\sfunction\swhen\sin\stesting\smode.
-D 2010-06-17T16:08:54
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in a5cad1f8f3e021356bfcc6c77dc16f6f1952bbc3
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -159,7 +156,7 @@ F src/os_common.h a8f95b81eca8a1ab8593d23e94f8a35f35d4078f
 F src/os_os2.c 665876d5eec7585226b0a1cf5e18098de2b2da19
 F src/os_unix.c ae173c9f6afaa58b2833a1c95c6cd32021755c42
 F src/os_win.c dfde7d33c446e89dd9a277c036f2c4cc564b3138
-F src/pager.c b5584c5e75e463b4a136e26858d555e83ca97b44
+F src/pager.c 4fe451d68950002eb985e6325d666ab54956a37f
 F src/pager.h ca1f23c0cf137ac26f8908df2427c8b308361efd
 F src/parse.y ace5c7a125d9f2a410e431ee3209034105045f7e
 F src/pcache.c 1e9aa2dbc0845b52e1b51cc39753b6d1e041cb07
@@ -220,7 +217,7 @@ F src/update.c 9859f2056c7739a1db0d9774ccb6c2f0cee6d1de
 F src/utf.c 1baeeac91707a4df97ccc6141ec0f808278af685
 F src/util.c 32aebf04c10e51ad3977a928b7416bed671b620b
 F src/vacuum.c 241a8386727c1497eba4955933356dfba6ff8c9f
-F src/vdbe.c 8a910a19981b8f670f4d67b5b0673459de50ccba
+F src/vdbe.c e115585b14d2cc4128cb53a7e42f207750e80f55
 F src/vdbe.h 471f6a3dcec4817ca33596fe7f6654d56c0e75f3
 F src/vdbeInt.h 19ebc8c2a2e938340051ee65af3f377fb99102d1
 F src/vdbeapi.c dc3138f10afbc95ed3c21dd25abb154504b1db9d
@@ -469,7 +466,7 @@ F test/join4.test 1a352e4e267114444c29266ce79e941af5885916
 F test/join5.test 86675fc2919269aa923c84dd00ee4249b97990fe
 F test/join6.test bf82cf3f979e9eade83ad0d056a66c5ed71d1901
 F test/journal1.test 36f2d1bb9bf03f790f43fbdb439e44c0657fab19
-F test/jrnlmode.test cd0c9c5b2555f3d5bb72ed8aa8d0ad16ecf77e7c
+F test/jrnlmode.test 76f94d61528c5ff32102a12f8cf34f4cc36f7849
 F test/jrnlmode2.test fe79ea1f0375c926b8de0362ddf94f34a64135fd
 F test/jrnlmode3.test cfcdb12b90e640a23b92785a002d96c0624c8710
 F test/keyword1.test a2400977a2e4fde43bf33754c2929fda34dbca05
@@ -826,14 +823,7 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
-P 1ec74591a93e8b27ad3ac739914a48a91972e82c
+P 7c3a86b9c7e2a35ce755c32b38e911e79d843fad
-R f22efcb25274595c63db494b4fd0d5e3
+R 1e4481b965cd36ec30ba83a04296f9cc
-U drh
+U dan
-Z 5de72be9b8f0adddcd3189b98a437ea2
+Z b00e14e0e21b5f60f6931c141403c159
------BEGIN PGP SIGNATURE-----
-Version: GnuPG v1.4.6 (GNU/Linux)
-
-iD8DBQFMGkiZoxKgR168RlERAqWGAJwJQXBZXrZmTaB1vIkV/5uryay3cACbBcij
-ZJYGkT2oDVKZ+q0ThWu3qBk=
-=rpt5
------END PGP SIGNATURE-----

manifest.uuid

@@ -1 +1 @@
-7c3a86b9c7e2a35ce755c32b38e911e79d843fad
+9a949a3a5c32b8bfbb94e10e18d050ec80a25553

src/pager.c

@@ -5877,6 +5877,48 @@ int sqlite3PagerSetJournalMode(Pager *pPager, int eMode){
 
     /* Change the journal mode. */
     pPager->journalMode = (u8)eMode;
+
+    /* When transistioning from TRUNCATE or PERSIST to any other journal
+    ** mode except WAL (and we are not in locking_mode=EXCLUSIVE) then 
+    ** delete the journal file.
+    */
+    assert( (PAGER_JOURNALMODE_TRUNCATE & 5)==1 );
+    assert( (PAGER_JOURNALMODE_PERSIST & 5)==1 );
+    assert( (PAGER_JOURNALMODE_DELETE & 5)==0 );
+    assert( (PAGER_JOURNALMODE_MEMORY & 5)==4 );
+    assert( (PAGER_JOURNALMODE_OFF & 5)==0 );
+    assert( (PAGER_JOURNALMODE_WAL & 5)==5 );
+
+    assert( isOpen(pPager->fd) || pPager->exclusiveMode );
+    if( !pPager->exclusiveMode && (eOld & 5)==1 && (eMode & 1)==0 ){
+
+      /* In this case we would like to delete the journal file. If it is
+      ** not possible, then that is not a problem. Deleting the journal file
+      ** here is an optimization only.
+      **
+      ** Before deleting the journal file, obtain a RESERVED lock on the
+      ** database file. This ensures that the journal file is not deleted
+      ** while it is in use by some other client.
+      */
+      int rc = SQLITE_OK;
+      int state = pPager->state;
+      if( state<PAGER_SHARED ){
+        rc = sqlite3PagerSharedLock(pPager);
+      }
+      if( pPager->state==PAGER_SHARED ){
+        assert( rc==SQLITE_OK );
+        rc = sqlite3OsLock(pPager->fd, RESERVED_LOCK);
+      }
+      if( rc==SQLITE_OK ){
+        sqlite3OsDelete(pPager->pVfs, pPager->zJournal, 0);
+      }
+      if( rc==SQLITE_OK && state==PAGER_SHARED ){
+        sqlite3OsUnlock(pPager->fd, SHARED_LOCK);
+      }else if( state==PAGER_UNLOCK ){
+        pager_unlock(pPager);
+      }
+      assert( state==pPager->state );
+    }
   }
 
   /* Return the new journal mode */

src/vdbe.c

@@ -5251,9 +5251,6 @@ case OP_JournalMode: {    /* out2-prerelease */
         }else if( rc==SQLITE_BUSY && pOp->p5==0 ){
           goto abort_due_to_error;
         }
-      }else{
-        sqlite3PagerSetJournalMode(pPager, PAGER_JOURNALMODE_DELETE);
-        rc = SQLITE_OK;
       }
   
       /* Open a transaction on the database file. Regardless of the journal
@@ -5261,8 +5258,7 @@ case OP_JournalMode: {    /* out2-prerelease */
       */
       assert( sqlite3BtreeIsInTrans(pBt)==0 );
       if( rc==SQLITE_OK ){
-        rc = sqlite3BtreeSetVersion(pBt, 
+        rc = sqlite3BtreeSetVersion(pBt, (eNew==PAGER_JOURNALMODE_WAL ? 2 : 1));
-                                    (eNew==PAGER_JOURNALMODE_WAL ? 2 : 1));
         if( rc==SQLITE_BUSY && pOp->p5==0 ) goto abort_due_to_error;
       }
       if( rc==SQLITE_BUSY ){
@@ -5274,6 +5270,7 @@ case OP_JournalMode: {    /* out2-prerelease */
 #endif /* ifndef SQLITE_OMIT_WAL */
 
   eNew = sqlite3PagerSetJournalMode(pPager, eNew);
+
   pOut = &aMem[pOp->p2];
   pOut->flags = MEM_Str|MEM_Static|MEM_Term;
   pOut->z = (char *)sqlite3JournalModename(eNew);

test/jrnlmode.test

@@ -484,7 +484,7 @@ ifcapable pragma {
           INSERT INTO t4 VALUES(3, 4);
       }
       file exists test.db-journal
-    } {1}
+    } {0}
     do_test jrnlmode-6.7 {
       execsql {
         COMMIT;
@@ -493,7 +493,7 @@ ifcapable pragma {
     } {1 2 3 4}
     do_test jrnlmode-6.8 {
       file exists test.db-journal
-    } {1}
+    } {0}
     do_test jrnlmode-6.9 {
       execsql {
         PRAGMA journal_mode = DELETE;