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Additional performance improvements in sqlite3BtreeMoveto. (CVS 2926)

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FossilOrigin-Name: 52b3be96b6e96994ec6fbcc67bf355cd05f61730
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drh
2006-01-12 15:01:15 +00:00
parent b562f0ba96
commit d172f86fe2
3 changed files with 18 additions and 10 deletions
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14
src/btree.c
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@@ -9,7 +9,7 @@
** May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.292 2006/01/12 14:30:19 drh Exp $
** $Id: btree.c,v 1.293 2006/01/12 15:01:16 drh Exp $
**
** This file implements a external (disk-based) database using BTrees.
** For a detailed discussion of BTrees, refer to
@@ -3326,9 +3326,15 @@ int sqlite3BtreeMoveto(BtCursor *pCur, const void *pKey, i64 nKey, int *pRes){
void *pCellKey;
i64 nCellKey;
pCur->idx = (lwr+upr)/2;
parseCell(pPage, pCur->idx, &pCur->info);
nCellKey = pCur->info.nKey;
if( pPage->intKey ){
u8 *pCell = findCell(pPage, pCur->idx);
pCell += pPage->childPtrSize;
if( pPage->hasData ){
int dummy;
pCell += getVarint32(pCell, &dummy);
}
getVarint(pCell, &nCellKey);
pCur->info.nSize = 0;
if( nCellKey<nKey ){
c = -1;
}else if( nCellKey>nKey ){
@@ -3338,6 +3344,8 @@ int sqlite3BtreeMoveto(BtCursor *pCur, const void *pKey, i64 nKey, int *pRes){
}
}else{
int available;
parseCell(pPage, pCur->idx, &pCur->info);
nCellKey = pCur->info.nKey;
pCellKey = (void *)fetchPayload(pCur, &available, 0);
if( available>=nCellKey ){
c = pCur->xCompare(pCur->pArg, nCellKey, pCellKey, nKey, pKey);