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Reduce the number of calls to memset() in sqlite3DbMallocZero().

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FossilOrigin-Name: cede2bf8e42ac140a8cc75a1d173083f543ba467
This commit is contained in:
drh
2016-01-08 12:46:39 +00:00
parent 33d09da1f8
commit ca3862dc6e
4 changed files with 22 additions and 16 deletions
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17
src/select.c
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@@ -111,29 +111,34 @@ Select *sqlite3SelectNew(
Select *pNew;
Select standin;
sqlite3 *db = pParse->db;
pNew = sqlite3DbMallocZero(db, sizeof(*pNew) );
pNew = sqlite3DbMallocRaw(db, sizeof(*pNew) );
if( pNew==0 ){
assert( db->mallocFailed );
pNew = &standin;
memset(pNew, 0, sizeof(*pNew));
}
if( pEList==0 ){
pEList = sqlite3ExprListAppend(pParse, 0, sqlite3Expr(db,TK_ASTERISK,0));
}
pNew->pEList = pEList;
pNew->op = TK_SELECT;
pNew->selFlags = selFlags;
pNew->iLimit = 0;
pNew->iOffset = 0;
pNew->addrOpenEphm[0] = -1;
pNew->addrOpenEphm[1] = -1;
pNew->nSelectRow = 0;
if( pSrc==0 ) pSrc = sqlite3DbMallocZero(db, sizeof(*pSrc));
pNew->pSrc = pSrc;
pNew->pWhere = pWhere;
pNew->pGroupBy = pGroupBy;
pNew->pHaving = pHaving;
pNew->pOrderBy = pOrderBy;
pNew->selFlags = selFlags;
pNew->op = TK_SELECT;
pNew->pPrior = 0;
pNew->pNext = 0;
pNew->pLimit = pLimit;
pNew->pOffset = pOffset;
pNew->pWith = 0;
assert( pOffset==0 || pLimit!=0 || pParse->nErr>0 || db->mallocFailed!=0 );
pNew->addrOpenEphm[0] = -1;
pNew->addrOpenEphm[1] = -1;
if( db->mallocFailed ) {
clearSelect(db, pNew, pNew!=&standin);
pNew = 0;