From 783dece5d67533c564215c295f66e8dcb3feb006 Mon Sep 17 00:00:00 2001
From: drh <drh@noemail.net>
Date: Wed, 5 Jun 2013 17:53:43 +0000
Subject: [PATCH] Performance improvement for the OR-clause analysis in the
 NGQP.

FossilOrigin-Name: 9b1c4954e468d0acfb5787e6bff56d50a3e7bc1a
---
 manifest      | 12 ++++++------
 manifest.uuid |  2 +-
 src/where.c   | 28 ++++++++++++++--------------
 3 files changed, 21 insertions(+), 21 deletions(-)

diff --git a/manifest b/manifest
index 454d643033..68794b6938 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Minor\sperformance\stuning\sof\sthe\sNGQP.
-D 2013-06-05T16:19:59.536
+C Performance\simprovement\sfor\sthe\sOR-clause\sanalysis\sin\sthe\sNGQP.
+D 2013-06-05T17:53:43.355
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 5e41da95d92656a5004b03d3576e8b226858a28e
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -289,7 +289,7 @@ F src/vtab.c b05e5f1f4902461ba9f5fc49bb7eb7c3a0741a83
 F src/wal.c 436bfceb141b9423c45119e68e444358ee0ed35d
 F src/wal.h df01efe09c5cb8c8e391ff1715cca294f89668a4
 F src/walker.c 4fa43583d0a84b48f93b1e88f11adf2065be4e73
-F src/where.c 7d8a020b2d60ff2b536e6325af18ed11c24f81e5
+F src/where.c 35e510bf0de4925316934e0ae989db9d062069d5
 F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
 F test/aggnested.test 45c0201e28045ad38a530b5a144b73cd4aa2cfd6
@@ -1094,7 +1094,7 @@ F tool/vdbe-compress.tcl f12c884766bd14277f4fcedcae07078011717381
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
 F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac
-P 1c4a78807b7a28c9976ca8c5722ff4e2e8755b7e
-R 4c15e208b04c5a33c6528133849a04db
+P cbef38c2d123e7d5a02c2a2450e8b329e3e96ee9
+R 0e9737367b7d6db3cdf59c7691a34aed
 U drh
-Z c639596f7b6bcfbd4cf032fe7e7c5fd1
+Z 4606f36521508d3eb4fac531dd74f101
diff --git a/manifest.uuid b/manifest.uuid
index 2673f09571..0a8e044566 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-cbef38c2d123e7d5a02c2a2450e8b329e3e96ee9
\ No newline at end of file
+9b1c4954e468d0acfb5787e6bff56d50a3e7bc1a
\ No newline at end of file
diff --git a/src/where.c b/src/where.c
index 4229ddc7ec..342c9ac721 100644
--- a/src/where.c
+++ b/src/where.c
@@ -4430,17 +4430,6 @@ static int whereLoopAddOr(WhereLoopBuilder *pBuilder, Bitmask mExtra){
   if( pWC->wctrlFlags & WHERE_AND_ONLY ) return SQLITE_OK;
   pWCEnd = pWC->a + pWC->nTerm;
   pNew = pBuilder->pNew;
-  pItem = pBuilder->pTabList->a + pNew->iTab;
-  iCur = pItem->iCursor;
-  sSubBuild = *pBuilder;
-  sSubBuild.pOrderBy = 0;
-  sSubBuild.pBest = &sBest;
-  tempWC.pParse = pWC->pParse;
-  tempWC.pMaskSet = pWC->pMaskSet;
-  tempWC.pOuter = pWC;
-  tempWC.op = TK_AND;
-  tempWC.wctrlFlags = 0;
-  tempWC.nTerm = 1;
 
   for(pTerm=pWC->a; pTerm<pWCEnd && rc==SQLITE_OK; pTerm++){
     if( (pTerm->eOperator & WO_OR)!=0
@@ -4452,12 +4441,23 @@ static int whereLoopAddOr(WhereLoopBuilder *pBuilder, Bitmask mExtra){
       double rTotal = 0;
       double nRow = 0;
       Bitmask prereq = mExtra;
-
+    
+      pItem = pBuilder->pTabList->a + pNew->iTab;
+      iCur = pItem->iCursor;
+      sSubBuild = *pBuilder;
+      sSubBuild.pOrderBy = 0;
+      sSubBuild.pBest = &sBest;
 
       for(pOrTerm=pOrWC->a; pOrTerm<pOrWCEnd; pOrTerm++){
-        if( (pOrTerm->eOperator& WO_AND)!=0 ){
+        if( (pOrTerm->eOperator & WO_AND)!=0 ){
           sSubBuild.pWC = &pOrTerm->u.pAndInfo->wc;
         }else if( pOrTerm->leftCursor==iCur ){
+          tempWC.pParse = pWC->pParse;
+          tempWC.pMaskSet = pWC->pMaskSet;
+          tempWC.pOuter = pWC;
+          tempWC.op = TK_AND;
+          tempWC.wctrlFlags = 0;
+          tempWC.nTerm = 1;
           tempWC.a = pOrTerm;
           sSubBuild.pWC = &tempWC;
         }else{
@@ -4787,7 +4787,7 @@ static const char *wherePathName(WherePath *pPath, int nLoop, WhereLoop *pLast){
 ** error occurs.
 */
 static int wherePathSolver(WhereInfo *pWInfo, double nRowEst){
-  int mxChoice = 10;        /* Maximum number of simultaneous paths tracked */
+  int mxChoice;             /* Maximum number of simultaneous paths tracked */
   int nLoop;                /* Number of terms in the join */
   sqlite3 *db;              /* The database connection */
   int iLoop;                /* Loop counter over the terms of the join */
-- 
2.47.2