diff --git a/manifest b/manifest
index 1e706f6843..f7cf4c926f 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Make\ssqlite3_count_changes()\sand\stotal_changes()\swork\swith\s"DELETE\sFROM\s<table-name>".\s(CVS\s5844)
-D 2008-10-27T13:59:34
+C If\san\sSQLITE_DELETE\sauthorization\scallback\sreturns\sSQLITE_IGNORE,\sproceed\swith\sthe\sdelete\soperation\sbut\sdisable\sthe\struncate\soptimization.\s(CVS\s5845)
+D 2008-10-27T15:34:33
 F Makefile.arm-wince-mingw32ce-gcc fcd5e9cd67fe88836360bb4f9ef4cb7f8e2fb5a0
 F Makefile.in 3fe17eccd87d385b5adc9766828716cfdd154d6b
 F Makefile.linux-gcc d53183f4aa6a9192d249731c90dbdffbd2c68654
@@ -106,7 +106,7 @@ F src/build.c d6d55f97abcb6f17ac3e9e7a1dd8c0db67db34fd
 F src/callback.c e970e5beddbdb23f89a6d05cb1a6419d9f755624
 F src/complete.c cb14e06dbe79dee031031f0d9e686ff306afe07c
 F src/date.c 6f4277fa56d8c1b8e70c0bde838c9e99609f5ec0
-F src/delete.c b0b7c499ccf28c1857905c9cf42f4ddc49bf7331
+F src/delete.c f77efc8c63e656316e038b9bff014c6fd7b13f00
 F src/expr.c 2b1945314fdc661fb04306cb86bd8516cfd12d4a
 F src/fault.c dc88c821842157460750d2d61a8a8b4197d047ff
 F src/func.c 8431b40a7843d1024145684d303c55b4ee087bbe
@@ -218,8 +218,9 @@ F test/attach.test 75a5d22f88e730967d68f2c9f95e786e3953d8e3
 F test/attach2.test a295d2d7061adcee5884ef4a93c7c96a82765437
 F test/attach3.test 7b92dc8e40c1ebca9732ca6f2d3fefbd46f196df
 F test/attachmalloc.test cf8cf17d183de357b1147a9baacbdfc85b940b61
-F test/auth.test 9eb4b6b99eee54c95711c74c4b9694acf4d850ed
+F test/auth.test 0e901aeb399f766fd58f5e19b8b9a09e2df9a341
 F test/auth2.test ee3ba272e2b975e913afc9b041ee75706e190005
+F test/auth3.test b3308950d3839a45193cdcd0473432e33fe38b61
 F test/autoinc.test ab549b48b389cabd92967b86c379ec8b31fa6c16
 F test/autovacuum.test 61260e25744189ff766f61ca3df23c1eeec0060e
 F test/autovacuum_ioerr2.test 598b0663074d3673a9c1bc9a16e80971313bafe6
@@ -651,7 +652,7 @@ F tool/speedtest16.c c8a9c793df96db7e4933f0852abb7a03d48f2e81
 F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
-P 297ad90dd3a69002e6e4175e9e3938b3a627574d
-R a6b93c46cddb9e42feecabc035375dbb
+P e68e4282adb9003aa297d033aeb5d9cadee215cd
+R 7698d63a46c3061737eee132dee3f7c9
 U danielk1977
-Z 98ec3e2e89a662c96092f7315cee2195
+Z 43f7a2c2ff97da790b34dc2cf861e4e2
diff --git a/manifest.uuid b/manifest.uuid
index 10af588145..e3198fdaa1 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-e68e4282adb9003aa297d033aeb5d9cadee215cd
\ No newline at end of file
+65a2e131732399f0f14f982eb0689482fdb87b6c
\ No newline at end of file
diff --git a/src/delete.c b/src/delete.c
index 382f1a67f0..5f1f9027d8 100644
--- a/src/delete.c
+++ b/src/delete.c
@@ -12,7 +12,7 @@
 ** This file contains C code routines that are called by the parser
 ** in order to generate code for DELETE FROM statements.
 **
-** $Id: delete.c,v 1.184 2008/10/27 13:59:34 danielk1977 Exp $
+** $Id: delete.c,v 1.185 2008/10/27 15:34:33 danielk1977 Exp $
 */
 #include "sqliteInt.h"
 
@@ -234,6 +234,7 @@ void sqlite3DeleteFrom(
   NameContext sNC;       /* Name context to resolve expressions in */
   int iDb;               /* Database number */
   int memCnt = -1;       /* Memory cell used for change counting */
+  int rcauth;            /* Value returned by authorization callback */
 
 #ifndef SQLITE_OMIT_TRIGGER
   int isView;                  /* True if attempting to delete from a view */
@@ -281,7 +282,9 @@ void sqlite3DeleteFrom(
   iDb = sqlite3SchemaToIndex(db, pTab->pSchema);
   assert( iDb<db->nDb );
   zDb = db->aDb[iDb].zName;
-  if( sqlite3AuthCheck(pParse, SQLITE_DELETE, pTab->zName, 0, zDb) ){
+  rcauth = sqlite3AuthCheck(pParse, SQLITE_DELETE, pTab->zName, 0, zDb);
+  assert( rcauth==SQLITE_OK || rcauth==SQLITE_DENY || rcauth==SQLITE_IGNORE );
+  if( rcauth==SQLITE_DENY ){
     goto delete_from_cleanup;
   }
   assert(!isView || triggers_exist);
@@ -370,7 +373,7 @@ void sqlite3DeleteFrom(
   ** It is easier just to erase the whole table.  Note, however, that
   ** this means that the row change count will be incorrect.
   */
-  if( pWhere==0 && !triggers_exist && !IsVirtual(pTab) ){
+  if( rcauth==SQLITE_OK && pWhere==0 && !triggers_exist && !IsVirtual(pTab) ){
     assert( !isView );
     sqlite3VdbeAddOp3(v, OP_Clear, pTab->tnum, iDb, memCnt);
     if( !pParse->nested ){
diff --git a/test/auth.test b/test/auth.test
index ada28d2d0c..1cb2e324c3 100644
--- a/test/auth.test
+++ b/test/auth.test
@@ -12,7 +12,7 @@
 # focus of this script is testing the sqlite3_set_authorizer() API
 # and related functionality.
 #
-# $Id: auth.test,v 1.43 2008/07/02 13:13:52 danielk1977 Exp $
+# $Id: auth.test,v 1.44 2008/10/27 15:34:33 danielk1977 Exp $
 #
 
 set testdir [file dirname $argv0]
@@ -418,7 +418,10 @@ do_test auth-1.49 {
 } {0 {}}
 do_test auth-1.50 {
   execsql {SELECT * FROM t2}
-} {11 2 33}
+} {}
+do_test auth-1.50.2 {
+  execsql {INSERT INTO t2 VALUES(11, 2, 33)}
+} {}
 
 do_test auth-1.51 {
   proc auth {code arg1 arg2 arg3 arg4} {
diff --git a/test/auth3.test b/test/auth3.test
new file mode 100644
index 0000000000..0d99cac765
--- /dev/null
+++ b/test/auth3.test
@@ -0,0 +1,111 @@
+# 2008 October 27
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+#
+# Test that the truncate optimization is disabled if the SQLITE_DELETE
+# authorization callback returns SQLITE_IGNORE.
+#
+# $Id: auth3.test,v 1.1 2008/10/27 15:34:33 danielk1977 Exp $
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+
+# disable this test if the SQLITE_OMIT_AUTHORIZATION macro is
+# defined during compilation.
+if {[catch {db auth {}} msg]} {
+  finish_test
+  return
+}
+
+# Disable the statement cache for these tests.
+# 
+db cache size 0
+
+db authorizer ::auth
+proc auth {code arg1 arg2 arg3 arg4} {
+  if {$code=="SQLITE_DELETE"} {
+    return $::authcode
+  }
+  return SQLITE_OK
+}
+
+#--------------------------------------------------------------------------
+# The following tests - auth3-1.* - test that return values of SQLITE_DENY,
+# SQLITE_IGNORE, SQLITE_OK and <invalid> are correctly handled when returned
+# by an SQLITE_DELETE authorization callback triggered by a 
+# "DELETE FROM <table-name>" statement.
+#
+do_test auth3-1.1 {
+  execsql {
+    CREATE TABLE t1(a,b,c);
+    INSERT INTO t1 VALUES(1, 2, 3);
+    INSERT INTO t1 VALUES(4, 5, 6);
+  }
+} {}
+do_test auth3.1.2 {
+  set ::authcode SQLITE_DENY
+  catchsql { DELETE FROM t1 }
+} {1 {not authorized}}
+do_test auth3.1.3 {
+  set ::authcode SQLITE_INVALID
+  catchsql { DELETE FROM t1 }
+} {1 {illegal return value (1) from the authorization function - should be SQLITE_OK, SQLITE_IGNORE, or SQLITE_DENY}}
+do_test auth3.1.4 {
+  execsql { SELECT * FROM t1 }
+} {1 2 3 4 5 6}
+do_test auth3-1.5 {
+  set ::authcode SQLITE_IGNORE
+  execsql { 
+    DELETE FROM t1;
+    SELECT * FROM t1;
+  }
+} {}
+do_test auth3-1.6 {
+  set ::authcode SQLITE_OK
+  execsql {
+    INSERT INTO t1 VALUES(1, 2, 3);
+    INSERT INTO t1 VALUES(4, 5, 6);
+    DELETE FROM t1;
+    SELECT * FROM t1;
+  }
+} {}
+
+#--------------------------------------------------------------------------
+# These tests - auth3-2.* - test that returning SQLITE_IGNORE really does
+# disable the truncate optimization.
+#
+do_test auth3-2.1 {
+  set ::authcode SQLITE_OK
+  execsql {
+    INSERT INTO t1 VALUES(1, 2, 3);
+    INSERT INTO t1 VALUES(4, 5, 6);
+  }
+  set sqlite_search_count 0
+  execsql {
+    DELETE FROM t1;
+  }
+  set sqlite_search_count
+} {0}
+
+do_test auth3-2.2 {
+  set ::authcode SQLITE_IGNORE
+  execsql {
+    INSERT INTO t1 VALUES(1, 2, 3);
+    INSERT INTO t1 VALUES(4, 5, 6);
+  }
+  set sqlite_search_count 0
+  execsql {
+    DELETE FROM t1;
+  }
+  set sqlite_search_count
+} {1}
+
+finish_test