Always enable exclusive access mode for TEMP databases. This cannot be

changed.  The locking_mode pragma has not effect on the TEMP database. (CVS 3766)

FossilOrigin-Name: 04d3b9098ed06d5be24253edde50ea61b4641df8

manifest

@@ -1,5 +1,5 @@
-C Coverage\simprovements\sfor\swhere.c.\s(CVS\s3765)
+C Always\senable\sexclusive\saccess\smode\sfor\sTEMP\sdatabases.\s\sThis\scannot\sbe\nchanged.\s\sThe\slocking_mode\spragma\shas\snot\seffect\son\sthe\sTEMP\sdatabase.\s(CVS\s3766)
-D 2007-03-30T14:56:35
+D 2007-03-30T16:01:55
 F Makefile.in 2f2c3bf69faf0ae7b8e8af4f94f1986849034530
 F Makefile.linux-gcc 2d8574d1ba75f129aba2019f0b959db380a90935
 F README 9c4e2d6706bdcc3efdd773ce752a8cdab4f90028
@@ -86,7 +86,7 @@ F src/os_unix.c 4291be23eec73d1ec04010ae702364b781b5f773
 F src/os_unix.h 5768d56d28240d3fe4537fac08cc85e4fb52279e
 F src/os_win.c c3a8403ea28bbb89d6507fa984c5919bd3fe7539
 F src/os_win.h 41a946bea10f61c158ce8645e7646b29d44f122b
-F src/pager.c 08e997b91657fd82dc19c1d06f965eeaaa2de7f5
+F src/pager.c ae0b1e1ae9b3f7fc725b6c92cf10f2a582006e44
 F src/pager.h e79a24cf200b8771366217f5bca414f5b7823f42
 F src/parse.y 207ab04273ae13aa4a729b96008d294d5f334ab3
 F src/pragma.c 8fd4f98822007a8d2c34e235ad3c35f1d77b3e51
@@ -200,9 +200,9 @@ F test/distinctagg.test 2b89d1c5220d966a30ba4b40430338669301188b
 F test/enc.test 7a03417a1051fe8bc6c7641cf4c8c3f7e0066d52
 F test/enc2.test 45710bacfa9df29720bc84c067dfdf8c8ddfb797
 F test/enc3.test 890508efff6677345e93bf2a8adb0489b30df030
-F test/exclusive.test 83871f52ab1015dc1bfbf86b96e2ece29094d129
+F test/exclusive.test 6748eb0539c4652d596971584c50200729e57dbe
 F test/exclusive2.test 187993598a83257f4a1126a40d89144c01965500
-F test/exclusive3.test f2d1d0ab2a83bb8326dea516e1c99b833f44d8f8
+F test/exclusive3.test 0e49c35b7e7cb8e7280b4ce3f0359d30b207d2ff
 F test/expr.test c78843f730ccbe973d0c2ad1c99978f936893131
 F test/fkey1.test 153004438d51e6769fb1ce165f6313972d6263ce
 F test/format4.test bf3bed3b13c63abfb3cfec232597a319a31d0bcc
@@ -447,7 +447,7 @@ F www/tclsqlite.tcl bb0d1357328a42b1993d78573e587c6dcbc964b9
 F www/vdbe.tcl 87a31ace769f20d3627a64fa1fade7fed47b90d0
 F www/version3.tcl 890248cf7b70e60c383b0e84d77d5132b3ead42b
 F www/whentouse.tcl 97e2b5cd296f7d8057e11f44427dea8a4c2db513
-P 7e0aa964129612e2bad6fa45139d124f19cacd48
+P df64894bacd8023cf3c5939f062c8463ff5cdc04
-R b56988b2a4f41fbf2d60eaa052f1ee98
+R 46ff3e411333d7c07ca010df4bca596d
-U danielk1977
+U drh
-Z fce1180f998fc1408b89d9fcea97a6fe
+Z 515593da6a50233962143dfb23c8bb25

manifest.uuid

@@ -1 +1 @@
-df64894bacd8023cf3c5939f062c8463ff5cdc04
+04d3b9098ed06d5be24253edde50ea61b4641df8

src/pager.c

@@ -18,7 +18,7 @@
 ** file simultaneously, or one process from reading the database while
 ** another is writing.
 **
-** @(#) $Id: pager.c,v 1.308 2007/03/30 14:46:01 drh Exp $
+** @(#) $Id: pager.c,v 1.309 2007/03/30 16:01:55 drh Exp $
 */
 #ifndef SQLITE_OMIT_DISKIO
 #include "sqliteInt.h"
@@ -85,21 +85,24 @@
 **   PAGER_SYNCED        The pager moves to this state from PAGER_EXCLUSIVE
 **                       after all dirty pages have been written to the
 **                       database file and the file has been synced to
-**                       disk. All that remains to do is to remove the
+**                       disk. All that remains to do is to remove or
-**                       journal file and the transaction will be
+**                       truncate the journal file and the transaction 
-**                       committed.
+**                       will be committed.
 **
 ** The page cache comes up in PAGER_UNLOCK.  The first time a
 ** sqlite3PagerGet() occurs, the state transitions to PAGER_SHARED.
 ** After all pages have been released using sqlite_page_unref(),
 ** the state transitions back to PAGER_UNLOCK.  The first time
 ** that sqlite3PagerWrite() is called, the state transitions to
-** PAGER_RESERVED.  (Note that sqlite_page_write() can only be
+** PAGER_RESERVED.  (Note that sqlite3PagerWrite() can only be
 ** called on an outstanding page which means that the pager must
 ** be in PAGER_SHARED before it transitions to PAGER_RESERVED.)
-** The transition to PAGER_EXCLUSIVE occurs when before any changes
+** PAGER_RESERVED means that there is an open rollback journal.
-** are made to the database file.  After an sqlite3PagerRollback()
+** The transition to PAGER_EXCLUSIVE occurs before any changes
-** or sqlite_pager_commit(), the state goes back to PAGER_SHARED.
+** are made to the database file, though writes to the rollback
+** journal occurs with just PAGER_RESERVED.  After an sqlite3PagerRollback()
+** or sqlite3PagerCommitPhaseTwo(), the state can go back to PAGER_SHARED,
+** or it can stay at PAGER_EXCLUSIVE if we are in exclusive access mode.
 */
 #define PAGER_UNLOCK      0
 #define PAGER_SHARED      1   /* same as SHARED_LOCK */
@@ -1781,6 +1784,10 @@ int sqlite3PagerOpen(
   /* pPager->state = PAGER_UNLOCK; */
   /* pPager->errMask = 0; */
   pPager->tempFile = tempFile;
+  assert( tempFile==PAGER_LOCKINGMODE_NORMAL 
+          || tempFile==PAGER_LOCKINGMODE_EXCLUSIVE );
+  assert( PAGER_LOCKINGMODE_EXCLUSIVE==1 );
+  pPager->exclusiveMode = tempFile; 
   pPager->memDb = memDb;
   pPager->readOnly = readOnly;
   /* pPager->needSync = 0; */
@@ -3192,12 +3199,13 @@ int sqlite3PagerBegin(DbPage *pPg, int exFlag){
     */
     assert( pPager->nRec==0 );
     assert( pPager->origDbSize==0 );
+    assert( pPager->aInJournal==0 );
     sqlite3PagerPagecount(pPager);
-    pPager->origDbSize = pPager->dbSize;
     pPager->aInJournal = sqliteMalloc( pPager->dbSize/8 + 1 );
     if( !pPager->aInJournal ){
       rc = SQLITE_NOMEM;
     }else{
+      pPager->origDbSize = pPager->dbSize;
       rc = writeJournalHdr(pPager);
     }
   }
@@ -4173,7 +4181,12 @@ void *sqlite3PagerGetExtra(DbPage *pPg){
 ** locking-mode.
 */
 int sqlite3PagerLockingMode(Pager *pPager, int eMode){
-  if( eMode>=0 ){
+  assert( eMode==PAGER_LOCKINGMODE_QUERY
+            || eMode==PAGER_LOCKINGMODE_NORMAL
+            || eMode==PAGER_LOCKINGMODE_EXCLUSIVE );
+  assert( PAGER_LOCKINGMODE_QUERY<0 );
+  assert( PAGER_LOCKINGMODE_NORMAL>=0 && PAGER_LOCKINGMODE_EXCLUSIVE>=0 );
+  if( eMode>=0 && !pPager->tempFile ){
     pPager->exclusiveMode = eMode;
   }
   return (int)pPager->exclusiveMode;

test/exclusive.test

@@ -12,7 +12,7 @@
 # of these tests is exclusive access mode (i.e. the thing activated by 
 # "PRAGMA locking_mode = EXCLUSIVE").
 #
-# $Id: exclusive.test,v 1.3 2007/03/26 10:27:19 danielk1977 Exp $
+# $Id: exclusive.test,v 1.4 2007/03/30 16:01:55 drh Exp $
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
@@ -36,8 +36,9 @@ do_test exclusive-1.0 {
   execsql {
     pragma locking_mode;
     pragma main.locking_mode;
+    pragma temp.locking_mode;
   } 
-} {normal normal}
+} {normal normal exclusive}
 do_test exclusive-1.1 {
   execsql {
     pragma locking_mode = exclusive;
@@ -47,8 +48,9 @@ do_test exclusive-1.2 {
   execsql {
     pragma locking_mode;
     pragma main.locking_mode;
+    pragma temp.locking_mode;
   } 
-} {exclusive exclusive}
+} {exclusive exclusive exclusive}
 do_test exclusive-1.3 {
   execsql {
     pragma locking_mode = normal;
@@ -58,8 +60,9 @@ do_test exclusive-1.4 {
   execsql {
     pragma locking_mode;
     pragma main.locking_mode;
+    pragma temp.locking_mode;
   } 
-} {normal normal}
+} {normal normal exclusive}
 do_test exclusive-1.5 {
   execsql {
     pragma locking_mode = invalid;
@@ -69,8 +72,9 @@ do_test exclusive-1.6 {
   execsql {
     pragma locking_mode;
     pragma main.locking_mode;
+    pragma temp.locking_mode;
   } 
-} {normal normal}
+} {normal normal exclusive}
 do_test exclusive-1.7 {
   execsql {
     pragma locking_mode = exclusive;
@@ -87,9 +91,10 @@ do_test exclusive-1.8 {
   }
   execsql {
     pragma main.locking_mode;
+    pragma temp.locking_mode;
     pragma aux.locking_mode;
   }
-} {normal exclusive}
+} {normal exclusive exclusive}
 do_test exclusive-1.9 {
   execsql {
     pragma locking_mode;
@@ -121,21 +126,23 @@ do_test exclusive-1.12 {
   }
   execsql {
     pragma main.locking_mode;
+    pragma temp.locking_mode;
     pragma aux.locking_mode;
     pragma aux2.locking_mode;
   }
-} {normal normal normal}
+} {normal exclusive normal normal}
 do_test exclusive-1.13 {
   execsql {
     ATTACH 'test4.db' as aux3;
   }
   execsql {
     pragma main.locking_mode;
+    pragma temp.locking_mode;
     pragma aux.locking_mode;
     pragma aux2.locking_mode;
     pragma aux3.locking_mode;
   }
-} {normal normal normal normal}
+} {normal exclusive normal normal normal}
 
 do_test exclusive-1.99 {
   execsql {
@@ -367,7 +374,14 @@ do_test exclusive-4.5 {
 # Tests exclusive-5.X - test that statement journals are truncated
 # instead of deleted when in exclusive access mode.
 #
-#set sqlite_os_trace 1
+
+# Close and reopen the database so that the temp database is no
+# longer active.
+#
+db close
+sqlite db test.db
+
+
 do_test exclusive-5.0 {
   execsql {
     CREATE TABLE abc(a UNIQUE, b UNIQUE, c UNIQUE);
@@ -422,4 +436,3 @@ do_test exclusive-5.7 {
 } {1}
 
 finish_test
-

test/exclusive3.test

@@ -1,4 +1,4 @@
-# 2001 September 15
+# 2007 March 26
 #
 # The author disclaims copyright to this source code.  In place of
 # a legal notice, here is a blessing:
@@ -9,10 +9,10 @@
 #
 #***********************************************************************
 #
-# This file runs the tests in the file ioerr.test with auto-vacuum enabled
+# This file runs the tests in the file ioerr.test with 
-# databases.
+# exclusive access mode enabled.
 #
-# $Id: exclusive3.test,v 1.2 2007/03/27 16:19:52 danielk1977 Exp $
+# $Id: exclusive3.test,v 1.3 2007/03/30 16:01:55 drh Exp $
 
 set testdir [file dirname $argv0]
 source $testdir/tester.tcl
@@ -57,4 +57,3 @@ rename really_finish_test2 finish_test
 rename do_test ""
 rename really_do_test do_test
 finish_test
-