Inserting a few WhereLoop objects without leaking memory. Costs are

not correct.  Inequality and IN constraints are not implemented.

FossilOrigin-Name: e8881a8b2f25f38bc8ff77619f96f38fe530d13b

manifest

@@ -1,5 +1,5 @@
-C In\swhere.c,\smake\sfindTerm()\sa\swrapper\saround\smethods\sto\sa\snew\sWhereScan\sobject\nwhich\sis\scapable\sof\sfinding\sall\ssuitable\smatching\sterms,\snot\sjust\sthe\sfirst.\nThis\scheck-in\sincludes\ssome\sprototype\sfunctions\sfor\sbuilding\sWhereLoop\sobjects.
-D 2013-05-04T20:25:23.612
+C Inserting\sa\sfew\sWhereLoop\sobjects\swithout\sleaking\smemory.\s\sCosts\sare\nnot\scorrect.\s\sInequality\sand\sIN\sconstraints\sare\snot\simplemented.
+D 2013-05-07T19:44:38.531
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in ce81671efd6223d19d4c8c6b88ac2c4134427111
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -263,7 +263,7 @@ F src/vtab.c b05e5f1f4902461ba9f5fc49bb7eb7c3a0741a83
 F src/wal.c 436bfceb141b9423c45119e68e444358ee0ed35d
 F src/wal.h a4d3da523d55a226a0b28e9058ef88d0a8051887
 F src/walker.c 4fa43583d0a84b48f93b1e88f11adf2065be4e73
-F src/where.c 173347e4598207467401e1952bdee983cf0bf087
+F src/where.c e987a4ff2818b812f902361c1131fef4a8f95a41
 F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
 F test/aggnested.test 45c0201e28045ad38a530b5a144b73cd4aa2cfd6
@@ -1060,7 +1060,7 @@ F tool/vdbe-compress.tcl f12c884766bd14277f4fcedcae07078011717381
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
 F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac
-P ccaf4c3f7e1ec45e058d594d9b5c26818a37722a
-R d516c3475d503fb543da6770e30ae39a
+P dd92b8fa929badaf2f79e8a00c83667a9d589096
+R 20c9cc42b7ec6059ab1cb985542962e1
 U drh
-Z 4a8c637fc587086861ee6817f8b965a6
+Z 6dee1758f1f268139b7d8139f9ade772

manifest.uuid

@@ -1 +1 @@
-dd92b8fa929badaf2f79e8a00c83667a9d589096
+e8881a8b2f25f38bc8ff77619f96f38fe530d13b

src/where.c

@@ -5163,6 +5163,7 @@ static void whereLoopAddBtreeIndex(
   WhereTerm *pTerm;               /* A WhereTerm under consideration */
   int eqTermMask;                 /* Valid equality operators */
   WhereScan scan;                 /* Iterator for WHERE terms */
+  WhereLoop savedLoop;
 
   db = pBuilder->db;
   pNew = pBuilder->pNew;
@@ -5182,13 +5183,26 @@ static void whereLoopAddBtreeIndex(
     iCol = pProbe->aiColumn[pNew->nEq];
     pTerm = whereScanInit(&scan, pBuilder->pWC, pSrc->iCursor, iCol,
                           eqTermMask, iCol>=0 ? pProbe : 0);
+    savedLoop = *pNew;
     pNew->nEq++;
+    pNew->nTerm++;
     for(; pTerm!=0; pTerm = whereScanNext(&scan)){
       pNew->aTerm[pNew->nEq-1] = pTerm;
-      
+      pNew->nOut = (double)(pProbe->aiRowEst[pNew->nEq] * nInMul);
+      pNew->rSetup = (double)0;
+      pNew->rRun = pNew->nOut;
+      pNew->prereq = savedLoop.prereq | pTerm->prereqRight;
+      if( pProbe->tnum<=0 ){
+        pNew->wsFlags = savedLoop.wsFlags | WHERE_ROWID_EQ;
+      }else{
+        pNew->wsFlags = savedLoop.wsFlags | WHERE_COLUMN_EQ;
       }
-    pNew->nEq--;
-
+      whereLoopInsert(pBuilder->pWInfo, pNew);
+      if( pNew->nEq<pProbe->nColumn ){
+        whereLoopAddBtreeIndex(pBuilder, pSrc, pProbe, nInMul);
+      }
+    }
+    *pNew = savedLoop;
   }
 }
 
@@ -5202,7 +5216,6 @@ static void whereLoopAddBtree(
   Bitmask mExtra              /* Extra prerequesites for using this table */
 ){
   Index *pProbe;              /* An index we are evaluating */
-  int eqTermMask;             /* Current mask of valid equality operators */
   Index sPk;                  /* A fake index object for the primary key */
   tRowcnt aiRowEstPk[2];      /* The aiRowEst[] value for the sPk index */
   int aiColumnPk = -1;        /* The aColumn[] value for the sPk index */
@@ -5243,13 +5256,15 @@ static void whereLoopAddBtree(
   /* Loop over all indices
   */
   for(; pProbe; pProbe=pProbe->pNext){
+    WhereTerm **paTerm;
     pNew->prereq = mExtra;
     pNew->iTab = iTab;
     pNew->nEq = 0;
     pNew->nTerm = 0;
-    pNew->aTerm = sqlite3DbRealloc(db, pNew->aTerm,
+    paTerm = sqlite3DbRealloc(db, pNew->aTerm,
                               (pProbe->nColumn+1)*sizeof(pNew->aTerm[0]));
-    if( pNew->aTerm==0 ) break;
+    if( paTerm==0 ) break;
+    pNew->aTerm = paTerm;
     pNew->pIndex = pProbe;
 
     whereLoopAddBtreeIndex(pBuilder, pSrc, pProbe, 1);
@@ -5551,7 +5566,7 @@ WhereInfo *sqlite3WhereBegin(
 
   /* Construct the WhereLoop objects */
   WHERETRACE(("*** Optimizer Start ***\n"));
-  /*whereLoopAddAll(&sWLB);*/
+  whereLoopAddAll(&sWLB);
 
   /* Display all of the WhereLoop objects if wheretrace is enabled */
 #if defined(SQLITE_DEBUG) \
@@ -5563,16 +5578,16 @@ WhereInfo *sqlite3WhereBegin(
       struct SrcList_item *pItem = pTabList->a + p->iTab;
        Table *pTab = pItem->pTab;
       sqlite3DebugPrintf("%02d.%0*llx", p->iTab, nb, p->prereq);
-      sqlite3DebugPrintf("     %s",
+      sqlite3DebugPrintf(" %5s",
                          pItem->zAlias ? pItem->zAlias : pTab->zName);
       if( p->pIndex ){
-        sqlite3DebugPrintf(" index %s nEq %d", p->pIndex->zName, p->nEq);
+        sqlite3DebugPrintf(".%-5s %2d", p->pIndex->zName, p->nEq);
       }else{
-        sqlite3DebugPrintf("\n");
+        sqlite3DebugPrintf("%9s","");
       }
-      sqlite3DebugPrintf("     wsFlags %08x OB %d,%d nTerm %d\n",
+      sqlite3DebugPrintf(" fg %08x OB %d,%d N %2d",
                          p->wsFlags, p->iOb, p->nOb, p->nTerm);
-      sqlite3DebugPrintf("     cost %.2e + %.2e nOut %.2e\n",
+      sqlite3DebugPrintf(" cost %.2g+%.2g,%.2g\n",
                          p->prereq, p->rSetup, p->rRun, p->nOut);
     }
   }