database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-11 01:42:22 +03:00
Code Activity

Simplification and performance tweak to the high-speed NGQP bypass.

Browse Source 
FossilOrigin-Name: 0f8a38ee54208d6a477aa2482cd277b4808450f0
This commit is contained in:
drh
2013-06-10 14:56:25 +00:00
parent 43b85ef5c6
commit 3b75ffaaca
3 changed files with 22 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
src/where.c
View File

@@ -5192,7 +5192,6 @@ static int whereSimpleFastCase(WhereLoopBuilder *pBuilder){
WhereLoop *pLoop;
int iCur;
int j;
int nOrderBy;
Table *pTab;
Index *pIdx;
@@ -5205,29 +5204,19 @@ static int whereSimpleFastCase(WhereLoopBuilder *pBuilder){
iCur = pItem->iCursor;
pWC = &pWInfo->sWC;
pLoop = pBuilder->pNew;
pWInfo->a[0].pWLoop = pLoop;
pLoop->wsFlags = 0;
pLoop->maskSelf = getMask(&pWInfo->sMaskSet, iCur);
pWInfo->a[0].iTabCur = iCur;
#ifdef SQLITE_DEBUG
pLoop->cId = '0';
#endif
nOrderBy = pWInfo->pOrderBy ? pWInfo->pOrderBy->nExpr : 0;
pTerm = findTerm(pWC, iCur, -1, 1, WO_EQ, 0);
pTerm = findTerm(pWC, iCur, -1, 0, WO_EQ, 0);
if( pTerm ){
pLoop->wsFlags = WHERE_COLUMN_EQ|WHERE_IPK|WHERE_ONEROW;
pLoop->aLTerm[0] = pTerm;
pLoop->nLTerm = 1;
pLoop->u.btree.nEq = 1;
pLoop->rRun = (WhereCost)10;
pLoop->nOut = (WhereCost)1;
pWInfo->nRowOut = 1;
pWInfo->nOBSat = nOrderBy;
}else{
for(pIdx=pTab->pIndex; pIdx; pIdx=pIdx->pNext){
if( pIdx->onError==OE_None ) continue;
for(j=0; j<pIdx->nColumn; j++){
pTerm = findTerm(pWC, iCur, pIdx->aiColumn[j], 1, WO_EQ, pIdx);
pTerm = findTerm(pWC, iCur, pIdx->aiColumn[j], 0, WO_EQ, pIdx);
if( pTerm==0 ) break;
whereLoopResize(pWInfo->pParse->db, pLoop, j);
pLoop->aLTerm[j] = pTerm;
@@ -5241,13 +5230,22 @@ static int whereSimpleFastCase(WhereLoopBuilder *pBuilder){
pLoop->u.btree.nEq = j;
pLoop->u.btree.pIndex = pIdx;
pLoop->rRun = (WhereCost)15;
pLoop->nOut = (WhereCost)1;
pWInfo->nRowOut = 1;
pWInfo->nOBSat = nOrderBy;
break;
}
}
return pLoop->wsFlags!=0;
if( pLoop->wsFlags ){
pLoop->nOut = (WhereCost)1;
pWInfo->a[0].pWLoop = pLoop;
pLoop->maskSelf = getMask(&pWInfo->sMaskSet, iCur);
pWInfo->a[0].iTabCur = iCur;
pWInfo->nRowOut = 1;
pWInfo->nOBSat = pWInfo->pOrderBy ? pWInfo->pOrderBy->nExpr : 0;
#ifdef SQLITE_DEBUG
pLoop->cId = '0';
#endif
return 1;
}
return 0;
}
/*