From c13148ffc0f0ec2193a68b85f959a180679ad5b2 Mon Sep 17 00:00:00 2001
From: drh <drh@noemail.net>
Date: Wed, 27 Aug 2008 18:03:20 +0000
Subject: [PATCH] Do not mark pages as clean when doing a statement journal
 rollback. (CVS 5626)

FossilOrigin-Name: 9d7722f4f357b96c37f950024f1e7e160e2c1252
---
 manifest      | 14 +++++++-------
 manifest.uuid |  2 +-
 src/pager.c   | 25 ++++++++++++-------------
 3 files changed, 20 insertions(+), 21 deletions(-)

diff --git a/manifest b/manifest
index 8ad8f9c25e..59bc3b162e 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Modifications\sto\smalloc5.test\sto\saccount\sfor\sthe\sfact\sthat\ssqlite3_release_memory()\sno\slonger\sreclaims\sdirty\spages.\s(CVS\s5625)
-D 2008-08-27T16:38:57
+C Do\snot\smark\spages\sas\sclean\swhen\sdoing\sa\sstatement\sjournal\srollback.\s(CVS\s5626)
+D 2008-08-27T18:03:20
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 689e14735f862a5553bceef206d8c13e29504e44
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -134,7 +134,7 @@ F src/os_common.h 24525d8b7bce66c374dfc1810a6c9043f3359b60
 F src/os_os2.c e391fc95adc744bbdcefd4d11e3066998185a0a0
 F src/os_unix.c 4665cef7639dd937893c3ea076f0e8a8f215bb32
 F src/os_win.c aefe9ee26430678a19a058a874e4e2bd91398142
-F src/pager.c a38742815a6b2238d0b91d1dd64bda50d6ee95fc
+F src/pager.c 84f4c171a0cb4561291f212508b1a91a8a325abb
 F src/pager.h 914103bb62dbcc3d8e9f14baec812d027264d457
 F src/parse.y d0f76d2cb8d6883d5600dc20beb961a6022b94b8
 F src/pcache.c 3d9d933bb22f10956ab78d83798d88ca9a147e86
@@ -623,7 +623,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
 F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 1dbced29de5f59ba2ebf877edcadf171540374d1
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
-P 12f2d24f88e55d170dd7750e7904ff14e84e820e
-R b53ac5363faaa116cc8b7dfcfecb5950
-U danielk1977
-Z c5747597064276f7a0eeb73c949573eb
+P b01c65b065c62e3dd71e88866a953668b5e2f25f
+R 689d729100f20090b1e466716c44a30f
+U drh
+Z 88ce9a46e91a9c5f4a11c03c806a9437
diff --git a/manifest.uuid b/manifest.uuid
index e5374dc2f2..06d5901362 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-b01c65b065c62e3dd71e88866a953668b5e2f25f
\ No newline at end of file
+9d7722f4f357b96c37f950024f1e7e160e2c1252
\ No newline at end of file
diff --git a/src/pager.c b/src/pager.c
index 196e23e25b..b5296fbcd6 100644
--- a/src/pager.c
+++ b/src/pager.c
@@ -18,7 +18,7 @@
 ** file simultaneously, or one process from reading the database while
 ** another is writing.
 **
-** @(#) $Id: pager.c,v 1.483 2008/08/27 15:16:34 danielk1977 Exp $
+** @(#) $Id: pager.c,v 1.484 2008/08/27 18:03:20 drh Exp $
 */
 #ifndef SQLITE_OMIT_DISKIO
 #include "sqliteInt.h"
@@ -1056,15 +1056,15 @@ static void makeClean(PgHdr*);
 ** Read a single page from the journal file opened on file descriptor
 ** jfd.  Playback this one page.
 **
-** If useCksum==0 it means this journal does not use checksums.  Checksums
-** are not used in statement journals because statement journals do not
-** need to survive power failures.
+** The isMainJrnl flag is true if this is the main rollback journal and
+** false for the statement journal.  The main rollback journal uses
+** checksums - the statement journal does not.
 */
 static int pager_playback_one_page(
-  Pager *pPager, 
-  sqlite3_file *jfd,
-  i64 offset,
-  int useCksum
+  Pager *pPager,       /* The pager being played back */
+  sqlite3_file *jfd,   /* The file that is the journal being rolled back */
+  i64 offset,          /* Offset of the page within the journal */
+  int isMainJrnl       /* True for main rollback journal. False for Stmt jrnl */
 ){
   int rc;
   PgHdr *pPg;                   /* An existing page in the cache */
@@ -1072,10 +1072,10 @@ static int pager_playback_one_page(
   u32 cksum;                    /* Checksum used for sanity checking */
   u8 *aData = (u8 *)pPager->pTmpSpace;   /* Temp storage for a page */
 
-  /* useCksum should be true for the main journal and false for
+  /* isMainJrnl should be true for the main journal and false for
   ** statement journals.  Verify that this is always the case
   */
-  assert( jfd == (useCksum ? pPager->jfd : pPager->stfd) );
+  assert( jfd == (isMainJrnl ? pPager->jfd : pPager->stfd) );
   assert( aData );
 
   rc = read32bits(jfd, offset, &pgno);
@@ -1095,7 +1095,7 @@ static int pager_playback_one_page(
   if( pgno>(unsigned)pPager->dbSize ){
     return SQLITE_OK;
   }
-  if( useCksum ){
+  if( isMainJrnl ){
     rc = read32bits(jfd, offset+pPager->pageSize+4, &cksum);
     if( rc ) return rc;
     pPager->journalOff += 4;
@@ -1156,13 +1156,12 @@ static int pager_playback_one_page(
     ** sqlite3PagerRollback().
     */
     void *pData;
-    /* assert( pPg->nRef==0 || pPg->pgno==1 ); */
     pData = pPg->pData;
     memcpy(pData, aData, pPager->pageSize);
     if( pPager->xReiniter ){
       pPager->xReiniter(pPg, pPager->pageSize);
     }
-    makeClean(pPg);
+    if( isMainJrnl ) makeClean(pPg);
 #ifdef SQLITE_CHECK_PAGES
     pPg->pageHash = pager_pagehash(pPg);
 #endif