diff --git a/manifest b/manifest
index d92c7d7b7c..551c5d8bd6 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Add\sthe\ssqlite3_rtree_query_callback()\sAPI\sto\sthe\sRTree\svirtual\stable.
-D 2014-04-28T17:51:12.403
+C Merge\sall\srecent\strunk\senhancements\sand\sfixes\sinto\sthe\ssessions\sbranch.
+D 2014-04-28T18:02:21.241
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in e4ee6d36cdf6136aee0158675a3b24dd3bf31a5a
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -196,7 +196,7 @@ F src/global.c 1d7bb7ea8254ae6a68ed9bfaf65fcb3d1690b486
 F src/hash.c d139319967164f139c8d1bb8a11b14db9c4ba3cd
 F src/hash.h 8890a25af81fb85a9ad7790d32eedab4b994da22
 F src/hwtime.h d32741c8f4df852c7d959236615444e2b1063b08
-F src/insert.c e1ebd5d798da6b8dc180841c34e3c91b4d1fb798
+F src/insert.c 2396a980907782f959362c2aef8e1596bb57c5ac
 F src/journal.c b4124532212b6952f42eb2c12fa3c25701d8ba8d
 F src/legacy.c 0df0b1550b9cc1f58229644735e317ac89131f12
 F src/lempar.c cdf0a000315332fc9b50b62f3b5e22e080a0952b
@@ -232,12 +232,12 @@ F src/printf.c e5a0005f8b3de21f85da6a709d2fbee76775bf4b
 F src/random.c d10c1f85b6709ca97278428fd5db5bbb9c74eece
 F src/resolve.c 273d5f47c4e2c05b2d3d2bffeda939551ab59e66
 F src/rowset.c a9c9aae3234b44a6d7c6f5a3cadf90dce1e627be
-F src/select.c 269c3e31a450fce642a10569221a49180348c88e
+F src/select.c bc7feff0fb4c4a1b9d655b717bef166846b48e33
 F src/shell.c 2afe7a7154e97be0c74c5feacf09626bda8493be
 F src/sqlite.h.in 6e6d3e092ca968abb3e65fbe22ec9220a3b616b6
 F src/sqlite3.rc 11094cc6a157a028b301a9f06b3d03089ea37c3e
 F src/sqlite3ext.h 886f5a34de171002ad46fae8c36a7d8051c190fc
-F src/sqliteInt.h 8697c8e82d4d2ccbfe7fd2f582081e600c9dc7fc
+F src/sqliteInt.h 76b4d4f0b9200e58b0a2d5339e2d46b4c7c7c691
 F src/sqliteLimit.h 164b0e6749d31e0daa1a4589a169d31c0dec7b3d
 F src/status.c 7ac05a5c7017d0b9f0b4bcd701228b784f987158
 F src/table.c 2cd62736f845d82200acfa1287e33feb3c15d62e
@@ -293,7 +293,7 @@ F src/update.c 7bb549d61efc6853f5cc708c1de6931179f8a12d
 F src/utf.c 6dc9ec9f1b3db43ae8ba0365377f11df1ee4c01c
 F src/util.c c46c90459ef9bdc0c6c73803cf4c55425b4771cf
 F src/vacuum.c 3728d74919d4fb1356f9e9a13e27773db60b7179
-F src/vdbe.c 9d883d5c91c5e7636cd56e952a0ff567e2d5c119
+F src/vdbe.c d6038559beb49c57f73a79412821d7143fc276ee
 F src/vdbe.h d03fcf47890ae1c79a335ca994cb878b302697ca
 F src/vdbeInt.h c05d4572211384c560b7579e7a299248cf31d6bd
 F src/vdbeapi.c d3c662762b62e330a03f29de8e2ac7098ef78030
@@ -306,8 +306,8 @@ F src/vtab.c 21b932841e51ebd7d075e2d0ad1415dce8d2d5fd
 F src/wal.c 76e7fc6de229bea8b30bb2539110f03a494dc3a8
 F src/wal.h df01efe09c5cb8c8e391ff1715cca294f89668a4
 F src/walker.c 11edb74d587bc87b33ca96a5173e3ec1b8389e45
-F src/where.c 7614c4383d8b6143558dc349da286d0325704d35
-F src/whereInt.h 2564055b440e44ebec8b47f237bbccae6719b7af
+F src/where.c 6ae02f1e8b1b29744d9e8cd9b95eac4c5232736d
+F src/whereInt.h 929c1349b5355fd44f22cee5c14d72b3329c58a6
 F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
 F test/aggnested.test 45c0201e28045ad38a530b5a144b73cd4aa2cfd6
@@ -448,12 +448,12 @@ F test/descidx3.test 09ddbe3f5295f482d2f8b687cf6db8bad7acd9a2
 F test/diskfull.test 106391384780753ea6896b7b4f005d10e9866b6e
 F test/distinct.test 086e70c765f172e8974e9f83b9ac5ca03c154e77
 F test/distinctagg.test 1a6ef9c87a58669438fc771450d7a72577417376
-F test/e_createtable.test ee95d48664503d40f6cc9ef4a7d03216188e2ada
+F test/e_createtable.test ed82efcedc4b3656b27a5fcd12335cdb7e20eeee
 F test/e_delete.test d5186e2f5478b659f16a2c8b66c09892823e542a
 F test/e_droptrigger.test 3cd080807622c13e5bbb61fc9a57bd7754da2412
 F test/e_dropview.test 0c9f7f60989164a70a67a9d9c26d1083bc808306
 F test/e_expr.test 5c71d183fbf519a4769fd2e2124afdc70b5b1f42
-F test/e_fkey.test 630597377549af579d34faaf64c6959a5a68ef76
+F test/e_fkey.test a1783fe1f759e1990e6a11adfcf0702dac4d0707
 F test/e_fts3.test 5c02288842e4f941896fd44afdef564dd5fc1459
 F test/e_insert.test 1e44f84d2abe44d66e4fbf198be4b20e3cc724a0
 F test/e_reindex.test 396b7b4f0a66863b4e95116a67d93b227193e589
@@ -739,6 +739,7 @@ F test/orderby3.test 8619d06a3debdcd80a27c0fdea5c40b468854b99
 F test/orderby4.test 4d39bfbaaa3ae64d026ca2ff166353d2edca4ba4
 F test/orderby5.test 2490183fef54417209d1df253633a605d46bd350
 F test/orderby6.test 8b38138ab0972588240b3fca0985d2e400432859
+F test/orderby7.test 3d1383d52ade5b9eb3a173b3147fdd296f0202da
 F test/oserror.test 50417780d0e0d7cd23cf12a8277bb44024765df3
 F test/pager1.test 1acbdb14c5952a72dd43129cabdbf69aaa3ed1fa
 F test/pager2.test 67b8f40ae98112bcdba1f2b2d03ea83266418c71
@@ -913,6 +914,7 @@ F test/tkt-a8a0d2996a.test eb597379dbcefa24765763d7f682c00cb5924fa9
 F test/tkt-b1d3a2e531.test 8f7576e41ca179289ee1a8fee28386fd8e4b0550
 F test/tkt-b351d95f9.test d14a503c414c5c58fdde3e80f9a3cfef986498c0
 F test/tkt-b72787b1.test a95e8cdad0b98af1853ac7f0afd4ab27b77bf5f3
+F test/tkt-b75a9ca6b0.test 97cc2d5eeaf82799eb42138c0a1ff64370238ce4
 F test/tkt-bd484a090c.test 60460bf946f79a79712b71f202eda501ca99b898
 F test/tkt-bdc6bbbb38.test fc38bb09bdd440e3513a1f5f98fc60a075182d7d
 F test/tkt-c48d99d690.test ba61977d62ab612fc515b3c488a6fbd6464a2447
@@ -921,6 +923,7 @@ F test/tkt-d11f09d36e.test d999b548fef885d1d1afa49a0e8544ecf436869d
 F test/tkt-d635236375.test 9d37e988b47d87505bc9445be0ca447002df5d09
 F test/tkt-d82e3f3721.test bcc0dfba658d15bab30fd4a9320c9e35d214ce30
 F test/tkt-f3e5abed55.test d5a0126118142d13e27f6ce9f4c47096e9321c00
+F test/tkt-f67b41381a.test a23bc124c981662db712167bacd0ed8ad11abac9
 F test/tkt-f777251dc7a.test af6531446c64bfd268416f07b4df7be7f9c749d2
 F test/tkt-f7b4edec.test d998a08ff2b18b7f62edce8e3044317c45efe6c7
 F test/tkt-f973c7ac31.test 28ef85c7f015477916795246d8286aeda39d4ead
@@ -1177,8 +1180,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
 F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
-P 95e77efe076ab421bd246119c47dba5dacf9d087 f7dad408dd46a1e3612b6142a3afb1d0d4fcda00
-R dc0ef589b047e789a0dc76337788157a
-T +closed f7dad408dd46a1e3612b6142a3afb1d0d4fcda00
+P 3dca2809352c6c6d56db74447a814f77011c6220 af2cbe64adab5f9e3b0f3da00d06428088589d7f
+R 9172deb3091895924031286a7ef97633
 U drh
-Z d1607abc9a994a369c35e1f132aa6989
+Z dedb5680561bda872be1d3df9c89cc1d
diff --git a/manifest.uuid b/manifest.uuid
index ce5967cbb0..0367d488c9 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-3dca2809352c6c6d56db74447a814f77011c6220
\ No newline at end of file
+e158812c34b01ce516d26636a489509bf61d1c27
\ No newline at end of file
diff --git a/src/insert.c b/src/insert.c
index a0cf527c97..258b1637ae 100644
--- a/src/insert.c
+++ b/src/insert.c
@@ -1877,15 +1877,24 @@ static int xferOptimization(
     return 0;   /* Both tables must have the same INTEGER PRIMARY KEY */
   }
   for(i=0; i<pDest->nCol; i++){
-    if( pDest->aCol[i].affinity!=pSrc->aCol[i].affinity ){
+    Column *pDestCol = &pDest->aCol[i];
+    Column *pSrcCol = &pSrc->aCol[i];
+    if( pDestCol->affinity!=pSrcCol->affinity ){
       return 0;    /* Affinity must be the same on all columns */
     }
-    if( !xferCompatibleCollation(pDest->aCol[i].zColl, pSrc->aCol[i].zColl) ){
+    if( !xferCompatibleCollation(pDestCol->zColl, pSrcCol->zColl) ){
       return 0;    /* Collating sequence must be the same on all columns */
     }
-    if( pDest->aCol[i].notNull && !pSrc->aCol[i].notNull ){
+    if( pDestCol->notNull && !pSrcCol->notNull ){
       return 0;    /* tab2 must be NOT NULL if tab1 is */
     }
+    /* Default values for second and subsequent columns need to match. */
+    if( i>0
+     && ((pDestCol->zDflt==0)!=(pSrcCol->zDflt==0) 
+         || (pDestCol->zDflt && strcmp(pDestCol->zDflt, pSrcCol->zDflt)!=0))
+    ){
+      return 0;    /* Default values must be the same for all columns */
+    }
   }
   for(pDestIdx=pDest->pIndex; pDestIdx; pDestIdx=pDestIdx->pNext){
     if( pDestIdx->onError!=OE_None ){
diff --git a/src/select.c b/src/select.c
index c7f0b24a4a..6efdde4b72 100644
--- a/src/select.c
+++ b/src/select.c
@@ -4719,18 +4719,6 @@ int sqlite3Select(
   }
 #endif
 
-  /* If there is both a GROUP BY and an ORDER BY clause and they are
-  ** identical, then disable the ORDER BY clause since the GROUP BY
-  ** will cause elements to come out in the correct order.  This is
-  ** an optimization - the correct answer should result regardless.
-  ** Use the SQLITE_GroupByOrder flag with SQLITE_TESTCTRL_OPTIMIZER
-  ** to disable this optimization for testing purposes.
-  */
-  if( sqlite3ExprListCompare(p->pGroupBy, sSort.pOrderBy, -1)==0
-         && OptimizationEnabled(db, SQLITE_GroupByOrder) ){
-    sSort.pOrderBy = 0;
-  }
-
   /* If the query is DISTINCT with an ORDER BY but is not an aggregate, and 
   ** if the select-list is the same as the ORDER BY list, then this query
   ** can be rewritten as a GROUP BY. In other words, this:
@@ -4859,6 +4847,7 @@ int sqlite3Select(
     int addrEnd;        /* End of processing for this SELECT */
     int sortPTab = 0;   /* Pseudotable used to decode sorting results */
     int sortOut = 0;    /* Output register from the sorter */
+    int orderByGrp = 0; /* True if the GROUP BY and ORDER BY are the same */
 
     /* Remove any and all aliases between the result set and the
     ** GROUP BY clause.
@@ -4878,6 +4867,18 @@ int sqlite3Select(
       p->nSelectRow = 1;
     }
 
+
+    /* If there is both a GROUP BY and an ORDER BY clause and they are
+    ** identical, then it may be possible to disable the ORDER BY clause 
+    ** on the grounds that the GROUP BY will cause elements to come out 
+    ** in the correct order. It also may not - the GROUP BY may use a
+    ** database index that causes rows to be grouped together as required
+    ** but not actually sorted. Either way, record the fact that the
+    ** ORDER BY and GROUP BY clauses are the same by setting the orderByGrp
+    ** variable.  */
+    if( sqlite3ExprListCompare(pGroupBy, sSort.pOrderBy, -1)==0 ){
+      orderByGrp = 1;
+    }
  
     /* Create a label to jump to when we want to abort the query */
     addrEnd = sqlite3VdbeMakeLabel(v);
@@ -4958,7 +4959,8 @@ int sqlite3Select(
       */
       sqlite3VdbeAddOp2(v, OP_Gosub, regReset, addrReset);
       pWInfo = sqlite3WhereBegin(pParse, pTabList, pWhere, pGroupBy, 0,
-                                 WHERE_GROUPBY, 0);
+          WHERE_GROUPBY | (orderByGrp ? WHERE_SORTBYGROUP : 0), 0
+      );
       if( pWInfo==0 ) goto select_end;
       if( sqlite3WhereIsOrdered(pWInfo)==pGroupBy->nExpr ){
         /* The optimizer is able to deliver rows in group by order so
@@ -5023,6 +5025,21 @@ int sqlite3Select(
         VdbeComment((v, "GROUP BY sort")); VdbeCoverage(v);
         sAggInfo.useSortingIdx = 1;
         sqlite3ExprCacheClear(pParse);
+
+      }
+
+      /* If the index or temporary table used by the GROUP BY sort
+      ** will naturally deliver rows in the order required by the ORDER BY
+      ** clause, cancel the ephemeral table open coded earlier.
+      **
+      ** This is an optimization - the correct answer should result regardless.
+      ** Use the SQLITE_GroupByOrder flag with SQLITE_TESTCTRL_OPTIMIZER to 
+      ** disable this optimization for testing purposes.  */
+      if( orderByGrp && OptimizationEnabled(db, SQLITE_GroupByOrder) 
+       && (groupBySort || sqlite3WhereIsSorted(pWInfo))
+      ){
+        sSort.pOrderBy = 0;
+        sqlite3VdbeChangeToNoop(v, sSort.addrSortIndex);
       }
 
       /* Evaluate the current GROUP BY terms and store in b0, b1, b2...
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 3a2612c88c..3ab4281ebf 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -2133,6 +2133,7 @@ struct SrcList {
 #define WHERE_GROUPBY          0x0100 /* pOrderBy is really a GROUP BY */
 #define WHERE_DISTINCTBY       0x0200 /* pOrderby is really a DISTINCT clause */
 #define WHERE_WANT_DISTINCT    0x0400 /* All output needs to be distinct */
+#define WHERE_SORTBYGROUP      0x0800 /* Support sqlite3WhereIsSorted() */
 
 /* Allowed return values from sqlite3WhereIsDistinct()
 */
@@ -3104,6 +3105,7 @@ void sqlite3WhereEnd(WhereInfo*);
 u64 sqlite3WhereOutputRowCount(WhereInfo*);
 int sqlite3WhereIsDistinct(WhereInfo*);
 int sqlite3WhereIsOrdered(WhereInfo*);
+int sqlite3WhereIsSorted(WhereInfo*);
 int sqlite3WhereContinueLabel(WhereInfo*);
 int sqlite3WhereBreakLabel(WhereInfo*);
 int sqlite3WhereOkOnePass(WhereInfo*, int*);
diff --git a/src/vdbe.c b/src/vdbe.c
index 1822c807e3..7cf341d938 100644
--- a/src/vdbe.c
+++ b/src/vdbe.c
@@ -6384,8 +6384,8 @@ default: {          /* This is really OP_Noop and OP_Explain */
 
 #ifdef VDBE_PROFILE
     {
-      u64 elapsed = sqlite3Hwtime() - start;
-      pOp->cycles += elapsed;
+      u64 endTime = sqlite3Hwtime();
+      if( endTime>start ) pOp->cycles += endTime - start;
       pOp->cnt++;
     }
 #endif
diff --git a/src/where.c b/src/where.c
index e51eee5350..6342b7b50b 100644
--- a/src/where.c
+++ b/src/where.c
@@ -3712,18 +3712,36 @@ static void whereInfoFree(sqlite3 *db, WhereInfo *pWInfo){
 }
 
 /*
-** Return TRUE if the set of WHERE clause terms used by pA is a proper
-** subset of the WHERE clause terms used by pB.
+** Return TRUE if both of the following are true:
+**
+**   (1)  X has the same or lower cost that Y
+**   (2)  X is a proper subset of Y
+**
+** By "proper subset" we mean that X uses fewer WHERE clause terms
+** than Y and that every WHERE clause term used by X is also used
+** by Y.
+**
+** If X is a proper subset of Y then Y is a better choice and ought
+** to have a lower cost.  This routine returns TRUE when that cost 
+** relationship is inverted and needs to be adjusted.
 */
-static int whereLoopProperSubset(const WhereLoop *pA, const WhereLoop *pB){
+static int whereLoopCheaperProperSubset(
+  const WhereLoop *pX,       /* First WhereLoop to compare */
+  const WhereLoop *pY        /* Compare against this WhereLoop */
+){
   int i, j;
-  assert( pA->nLTerm<pB->nLTerm );  /* Checked by calling function */
-  for(j=0, i=pA->nLTerm-1; i>=0 && j>=0; i--){
-    for(j=pB->nLTerm-1; j>=0; j--){
-      if( pB->aLTerm[j]==pA->aLTerm[i] ) break;
-    }
+  if( pX->nLTerm >= pY->nLTerm ) return 0; /* X is not a subset of Y */
+  if( pX->rRun >= pY->rRun ){
+    if( pX->rRun > pY->rRun ) return 0;    /* X costs more than Y */
+    if( pX->nOut > pY->nOut ) return 0;    /* X costs more than Y */
   }
-  return j>=0;
+  for(j=0, i=pX->nLTerm-1; i>=0; i--){
+    for(j=pY->nLTerm-1; j>=0; j--){
+      if( pY->aLTerm[j]==pX->aLTerm[i] ) break;
+    }
+    if( j<0 ) return 0;  /* X not a subset of Y since term X[i] not used by Y */
+  }
+  return 1;  /* All conditions meet */
 }
 
 /*
@@ -3745,19 +3763,14 @@ static void whereLoopAdjustCost(const WhereLoop *p, WhereLoop *pTemplate){
   for(; p; p=p->pNextLoop){
     if( p->iTab!=pTemplate->iTab ) continue;
     if( (p->wsFlags & WHERE_INDEXED)==0 ) continue;
-    if( p->nLTerm<pTemplate->nLTerm
-     && (p->rRun<pTemplate->rRun || (p->rRun==pTemplate->rRun &&
-                                     p->nOut<=pTemplate->nOut))
-     && whereLoopProperSubset(p, pTemplate)
-    ){
+    if( whereLoopCheaperProperSubset(p, pTemplate) ){
+      /* Adjust pTemplate cost downward so that it is cheaper than its 
+      ** subset p */
       pTemplate->rRun = p->rRun;
       pTemplate->nOut = p->nOut - 1;
-    }else
-    if( p->nLTerm>pTemplate->nLTerm
-     && (p->rRun>pTemplate->rRun || (p->rRun==pTemplate->rRun &&
-                                     p->nOut>=pTemplate->nOut))
-     && whereLoopProperSubset(pTemplate, p)
-    ){
+    }else if( whereLoopCheaperProperSubset(pTemplate, p) ){
+      /* Adjust pTemplate cost upward so that it is costlier than p since
+      ** pTemplate is a proper subset of p */
       pTemplate->rRun = p->rRun;
       pTemplate->nOut = p->nOut + 1;
     }
@@ -4783,7 +4796,7 @@ static int whereLoopAddAll(WhereLoopBuilder *pBuilder){
 ** Note that processing for WHERE_GROUPBY and WHERE_DISTINCTBY is not as
 ** strict.  With GROUP BY and DISTINCT the only requirement is that
 ** equivalent rows appear immediately adjacent to one another.  GROUP BY
-** and DISTINT do not require rows to appear in any particular order as long
+** and DISTINCT do not require rows to appear in any particular order as long
 ** as equivelent rows are grouped together.  Thus for GROUP BY and DISTINCT
 ** the pOrderBy terms can be matched in any order.  With ORDER BY, the 
 ** pOrderBy terms must be matched in strict left-to-right order.
@@ -4844,14 +4857,6 @@ static i8 wherePathSatisfiesOrderBy(
   */
 
   assert( pOrderBy!=0 );
-
-  /* Sortability of virtual tables is determined by the xBestIndex method
-  ** of the virtual table itself */
-  if( pLast->wsFlags & WHERE_VIRTUALTABLE ){
-    testcase( nLoop>0 );  /* True when outer loops are one-row and match 
-                          ** no ORDER BY terms */
-    return pLast->u.vtab.isOrdered;
-  }
   if( nLoop && OptimizationDisabled(db, SQLITE_OrderByIdxJoin) ) return 0;
 
   nOrderBy = pOrderBy->nExpr;
@@ -4864,7 +4869,10 @@ static i8 wherePathSatisfiesOrderBy(
   for(iLoop=0; isOrderDistinct && obSat<obDone && iLoop<=nLoop; iLoop++){
     if( iLoop>0 ) ready |= pLoop->maskSelf;
     pLoop = iLoop<nLoop ? pPath->aLoop[iLoop] : pLast;
-    assert( (pLoop->wsFlags & WHERE_VIRTUALTABLE)==0 );
+    if( pLoop->wsFlags & WHERE_VIRTUALTABLE ){
+      if( pLoop->u.vtab.isOrdered ) obSat = obDone;
+      break;
+    }
     iCur = pWInfo->pTabList->a[pLoop->iTab].iCursor;
 
     /* Mark off any ORDER BY term X that is a column in the table of
@@ -4952,7 +4960,7 @@ static i8 wherePathSatisfiesOrderBy(
         }
 
         /* Find the ORDER BY term that corresponds to the j-th column
-        ** of the index and and mark that ORDER BY term off 
+        ** of the index and mark that ORDER BY term off 
         */
         bOnce = 1;
         isMatch = 0;
@@ -5032,6 +5040,36 @@ static i8 wherePathSatisfiesOrderBy(
   return -1;
 }
 
+
+/*
+** If the WHERE_GROUPBY flag is set in the mask passed to sqlite3WhereBegin(),
+** the planner assumes that the specified pOrderBy list is actually a GROUP
+** BY clause - and so any order that groups rows as required satisfies the
+** request.
+**
+** Normally, in this case it is not possible for the caller to determine
+** whether or not the rows are really being delivered in sorted order, or
+** just in some other order that provides the required grouping. However,
+** if the WHERE_SORTBYGROUP flag is also passed to sqlite3WhereBegin(), then
+** this function may be called on the returned WhereInfo object. It returns
+** true if the rows really will be sorted in the specified order, or false
+** otherwise.
+**
+** For example, assuming:
+**
+**   CREATE INDEX i1 ON t1(x, Y);
+**
+** then
+**
+**   SELECT * FROM t1 GROUP BY x,y ORDER BY x,y;   -- IsSorted()==1
+**   SELECT * FROM t1 GROUP BY y,x ORDER BY y,x;   -- IsSorted()==0
+*/
+int sqlite3WhereIsSorted(WhereInfo *pWInfo){
+  assert( pWInfo->wctrlFlags & WHERE_GROUPBY );
+  assert( pWInfo->wctrlFlags & WHERE_SORTBYGROUP );
+  return pWInfo->sorted;
+}
+
 #ifdef WHERETRACE_ENABLED
 /* For debugging use only: */
 static const char *wherePathName(WherePath *pPath, int nLoop, WhereLoop *pLast){
@@ -5044,7 +5082,6 @@ static const char *wherePathName(WherePath *pPath, int nLoop, WhereLoop *pLast){
 }
 #endif
 
-
 /*
 ** Given the list of WhereLoop objects at pWInfo->pLoops, this routine
 ** attempts to find the lowest cost path that visits each WhereLoop
@@ -5325,7 +5362,19 @@ static int wherePathSolver(WhereInfo *pWInfo, LogEst nRowEst){
       if( pWInfo->nOBSat<0 ) pWInfo->nOBSat = 0;
       pWInfo->revMask = pFrom->revLoop;
     }
+    if( (pWInfo->wctrlFlags & WHERE_SORTBYGROUP)
+        && pWInfo->nOBSat==pWInfo->pOrderBy->nExpr
+    ){
+      Bitmask notUsed = 0;
+      int nOrder = wherePathSatisfiesOrderBy(pWInfo, pWInfo->pOrderBy, 
+          pFrom, 0, nLoop-1, pFrom->aLoop[nLoop-1], &notUsed
+      );
+      assert( pWInfo->sorted==0 );
+      pWInfo->sorted = (nOrder==pWInfo->pOrderBy->nExpr);
+    }
   }
+
+
   pWInfo->nRowOut = pFrom->nRow;
 
   /* Free temporary memory and return success */
diff --git a/src/whereInt.h b/src/whereInt.h
index 419bb81c0e..72e7530db9 100644
--- a/src/whereInt.h
+++ b/src/whereInt.h
@@ -398,6 +398,7 @@ struct WhereInfo {
   LogEst nRowOut;           /* Estimated number of output rows */
   u16 wctrlFlags;           /* Flags originally passed to sqlite3WhereBegin() */
   i8 nOBSat;                /* Number of ORDER BY terms satisfied by indices */
+  u8 sorted;                /* True if really sorted (not just grouped) */
   u8 okOnePass;             /* Ok to use one-pass algorithm for UPDATE/DELETE */
   u8 untestedTerms;         /* Not all WHERE terms resolved by outer loop */
   u8 eDistinct;             /* One of the WHERE_DISTINCT_* values below */
diff --git a/test/e_createtable.test b/test/e_createtable.test
index 2cd63280df..42fc017e2a 100644
--- a/test/e_createtable.test
+++ b/test/e_createtable.test
@@ -884,9 +884,10 @@ do_execsql_test e_createtable-3.3.1 {
   );
 } {}
 
-# EVIDENCE-OF: R-10288-43169 For the purposes of the DEFAULT clause, an
+# EVIDENCE-OF: R-36381-62919 For the purposes of the DEFAULT clause, an
 # expression is considered constant provided that it does not contain
-# any sub-queries or string constants enclosed in double quotes.
+# any sub-queries, column or table references, or string literals
+# enclosed in double-quotes instead of single-quotes.
 #
 do_createtable_tests 3.4.1 -error {
   default value of column [x] is not constant
diff --git a/test/e_fkey.test b/test/e_fkey.test
index 921e967176..09756505c3 100644
--- a/test/e_fkey.test
+++ b/test/e_fkey.test
@@ -135,9 +135,9 @@ reset_db
 #
 # This also tests that foreign key constraints are disabled by default.
 #
-# EVIDENCE-OF: R-59578-04990 Foreign key constraints are disabled by
+# EVIDENCE-OF: R-44261-39702 Foreign key constraints are disabled by
 # default (for backwards compatibility), so must be enabled separately
-# for each database connection separately.
+# for each database connection.
 #
 drop_all_tables
 do_test e_fkey-4.1 {
@@ -163,9 +163,10 @@ do_test e_fkey-4.2 {
 } {world}
 
 #-------------------------------------------------------------------------
-# EVIDENCE-OF: R-15278-54456 The application can can also use a PRAGMA
+# EVIDENCE-OF: R-08013-37737 The application can also use a PRAGMA
 # foreign_keys statement to determine if foreign keys are currently
 # enabled.
+
 #
 # This also tests the example code in section 2 of foreignkeys.in.
 #
@@ -2990,8 +2991,8 @@ if {[clang_sanitize_address]==0} {
 # The setting of the recursive_triggers pragma does not affect foreign
 # key actions.
 #
-# EVIDENCE-OF: R-51769-32730 The PRAGMA recursive_triggers setting does
-# not not affect the operation of foreign key actions.
+# EVIDENCE-OF: R-44355-00270 The PRAGMA recursive_triggers setting does
+# not affect the operation of foreign key actions.
 #
 foreach recursive_triggers_setting [list 0 1 ON OFF] {
   drop_all_tables
diff --git a/test/orderby7.test b/test/orderby7.test
new file mode 100644
index 0000000000..8c5fc9a85f
--- /dev/null
+++ b/test/orderby7.test
@@ -0,0 +1,106 @@
+# 2014-04-25
+#
+# 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.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library.  The
+# focus of this file is testing ORDER BY optimizations on joins
+# that involve virtual tables.
+#
+
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set ::testprefix orderby7
+
+ifcapable !fts3 {
+  finish_test
+  return
+}
+
+do_execsql_test 1.0 {
+  CREATE VIRTUAL TABLE fts USING fts3(content TEXT);
+  INSERT INTO fts(rowid,content)
+     VALUES(1,'this is a test of the fts3 virtual'),
+           (2,'table used as part of a join together'),
+           (3,'with the DISTINCT keyword.  There was'),
+           (4,'a bug at one time (2013-06 through 2014-04)'),
+           (5,'that prevented this from working correctly.'),
+           (11,'a row that occurs twice'),
+           (12,'a row that occurs twice');
+ 
+  CREATE TABLE t1(x TEXT PRIMARY KEY, y);
+  INSERT OR IGNORE INTO t1 SELECT content, rowid+100 FROM fts;
+} {}
+do_execsql_test 1.1 {
+  SELECT DISTINCT fts.rowid, t1.y
+    FROM fts, t1
+   WHERE fts MATCH 'that twice'
+     AND content=x
+   ORDER BY y;
+} {11 111 12 111}
+do_execsql_test 1.2 {
+  SELECT DISTINCT fts.rowid, t1.x
+    FROM fts, t1
+   WHERE fts MATCH 'that twice'
+     AND content=x
+   ORDER BY 1;
+} {11 {a row that occurs twice} 12 {a row that occurs twice}}
+do_execsql_test 1.3 {
+  SELECT DISTINCT t1.x
+    FROM fts, t1
+   WHERE fts MATCH 'that twice'
+     AND content=x
+   ORDER BY 1;
+} {{a row that occurs twice}}
+do_execsql_test 1.4 {
+  SELECT t1.x
+    FROM fts, t1
+   WHERE fts MATCH 'that twice'
+     AND content=x
+   ORDER BY 1;
+} {{a row that occurs twice} {a row that occurs twice}}
+do_execsql_test 1.5 {
+  SELECT DISTINCT t1.x
+    FROM fts, t1
+   WHERE fts MATCH 'that twice'
+     AND content=x;
+} {{a row that occurs twice}}
+do_execsql_test 1.6 {
+  SELECT t1.x
+    FROM fts, t1
+   WHERE fts MATCH 'that twice'
+     AND content=x;
+} {{a row that occurs twice} {a row that occurs twice}}
+
+do_execsql_test 2.1 {
+  SELECT DISTINCT t1.x
+    FROM fts, t1
+   WHERE fts.rowid=11
+     AND content=x
+   ORDER BY fts.rowid;
+} {{a row that occurs twice}}
+do_execsql_test 2.2 {
+  SELECT DISTINCT t1.*
+    FROM fts, t1
+   WHERE fts.rowid=11
+     AND content=x
+   ORDER BY fts.rowid;
+} {{a row that occurs twice} 111}
+do_execsql_test 2.3 {
+  SELECT DISTINCT t1.*
+    FROM fts, t1
+   WHERE fts.rowid=11
+     AND content=x
+   ORDER BY t1.y
+} {{a row that occurs twice} 111}
+
+
+
+
+finish_test
diff --git a/test/tkt-b75a9ca6b0.test b/test/tkt-b75a9ca6b0.test
new file mode 100644
index 0000000000..0c81a534da
--- /dev/null
+++ b/test/tkt-b75a9ca6b0.test
@@ -0,0 +1,77 @@
+# 2014-04-21
+#
+# 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 ticket [b75a9ca6b0] has been fixed.
+#
+# Ticket [b75a9ca6b0] concerns queries that have both a GROUP BY
+# and an ORDER BY.  This code verifies that SQLite is able to
+# optimize out the ORDER BY in some circumstances, but retains the
+# ORDER BY when necessary.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set testprefix tkt-b75a9ca6b0
+
+do_execsql_test 1 {
+  CREATE TABLE t1 (x, y);
+  INSERT INTO t1 VALUES (1, 3); 
+  INSERT INTO t1 VALUES (2, 2);
+  INSERT INTO t1 VALUES (3, 1);
+}
+
+do_execsql_test 1.1 {
+  CREATE INDEX i1 ON t1(x, y);
+} 
+
+set idxscan {0 0 0 {SCAN TABLE t1 USING COVERING INDEX i1}}
+set tblscan {0 0 0 {SCAN TABLE t1}}
+set grpsort {0 0 0 {USE TEMP B-TREE FOR GROUP BY}}
+set sort    {0 0 0 {USE TEMP B-TREE FOR ORDER BY}}
+
+foreach {tn q res eqp} [subst -nocommands {
+  1 "SELECT * FROM t1 GROUP BY x, y ORDER BY x,y"
+  {1 3  2 2  3 1} {$idxscan}
+
+  2 "SELECT * FROM t1 GROUP BY x, y ORDER BY x"
+  {1 3  2 2  3 1} {$idxscan $sort}
+
+  3 "SELECT * FROM t1 GROUP BY y, x ORDER BY y, x"
+  {3 1  2 2  1 3} {$idxscan $sort}
+  
+  4 "SELECT * FROM t1 GROUP BY x ORDER BY x"
+  {1 3  2 2  3 1} {$idxscan}
+
+  5 "SELECT * FROM t1 GROUP BY y ORDER BY y"
+  {3 1  2 2  1 3} {$tblscan $grpsort}
+
+  6 "SELECT * FROM t1 GROUP BY y ORDER BY x"
+  {1 3  2 2  3 1} {$tblscan $grpsort $sort}
+
+  7 "SELECT * FROM t1 GROUP BY x, y ORDER BY x, y DESC"
+  {1 3  2 2  3 1} {$idxscan $sort}
+
+  8 "SELECT * FROM t1 GROUP BY x, y ORDER BY x DESC, y DESC"
+  {3 1  2 2  1 3} {$idxscan $sort}
+
+  9 "SELECT * FROM t1 GROUP BY x, y ORDER BY x ASC, y ASC"
+  {1 3  2 2  3 1} {$idxscan}
+
+  10 "SELECT * FROM t1 GROUP BY x, y ORDER BY x COLLATE nocase, y"
+  {1 3  2 2  3 1} {$idxscan $sort}
+
+}] {
+  do_execsql_test 1.$tn.1 $q $res
+  do_eqp_test     1.$tn.2 $q $eqp
+}
+
+
+finish_test
diff --git a/test/tkt-f67b41381a.test b/test/tkt-f67b41381a.test
new file mode 100644
index 0000000000..1ddec988cd
--- /dev/null
+++ b/test/tkt-f67b41381a.test
@@ -0,0 +1,53 @@
+# 2014 April 26
+#
+# 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 ticket f67b41381a has been resolved.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set testprefix tkt-f67b41381a
+
+do_execsql_test 1.0 {
+  CREATE TABLE t1(a);
+  INSERT INTO t1 VALUES(1);
+  ALTER TABLE t1 ADD COLUMN b DEFAULT 2;
+  CREATE TABLE t2(a, b);
+  INSERT INTO t2 SELECT * FROM t1;
+  SELECT * FROM t2;
+} {1 2}
+
+db cache size 0
+foreach {tn tbls xfer} {
+  1 { CREATE TABLE t1(a, b); CREATE TABLE t2(a, b)             }             1
+  2 { CREATE TABLE t1(a, b DEFAULT 'x'); CREATE TABLE t2(a, b) }             0
+  3 { CREATE TABLE t1(a, b DEFAULT 'x'); CREATE TABLE t2(a, b DEFAULT 'x') } 1
+  4 { CREATE TABLE t1(a, b DEFAULT NULL); CREATE TABLE t2(a, b) }            0
+  5 { CREATE TABLE t1(a DEFAULT 2, b); CREATE TABLE t2(a DEFAULT 1, b) }     1
+  6 { CREATE TABLE t1(a DEFAULT 1, b); CREATE TABLE t2(a DEFAULT 1, b) }     1
+  7 { CREATE TABLE t1(a DEFAULT 1, b DEFAULT 1);
+      CREATE TABLE t2(a DEFAULT 3, b DEFAULT 1) }                            1
+  8 { CREATE TABLE t1(a DEFAULT 1, b DEFAULT 1);
+      CREATE TABLE t2(a DEFAULT 3, b DEFAULT 3) }                            0
+
+} {
+
+  execsql { DROP TABLE t1; DROP TABLE t2 }
+  execsql $tbls
+
+  set res 1
+  db eval { EXPLAIN INSERT INTO t1 SELECT * FROM t2 } {
+    if {$opcode == "Column"} { set res 0 }
+  }
+
+  do_test 2.$tn [list set res] $xfer
+}
+
+finish_test