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Experimental change to "SELECT * FROM ... ORDER BY" processing to load some

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column values from the db after sorting.

FossilOrigin-Name: 9719cb46bbf501ce80f185159d594f593dd0b2639b9ef5a71a6c7b70046cb08d
This commit is contained in:
dan
2018-04-14 18:46:20 +00:00
parent 54f2cd905b
commit 24e25d32ce
6 changed files with 268 additions and 21 deletions
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7
src/expr.c
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@@ -1363,6 +1363,7 @@ ExprList *sqlite3ExprListDup(sqlite3 *db, ExprList *p, int flags){
pItem->sortOrder = pOldItem->sortOrder;
pItem->done = 0;
pItem->bSpanIsTab = pOldItem->bSpanIsTab;
pItem->bSorterRef = pOldItem->bSorterRef;
pItem->u = pOldItem->u;
}
return pNew;
@@ -4371,6 +4372,12 @@ int sqlite3ExprCodeExprList(
if( !ConstFactorOk(pParse) ) flags &= ~SQLITE_ECEL_FACTOR;
for(pItem=pList->a, i=0; i<n; i++, pItem++){
Expr *pExpr = pItem->pExpr;
#ifdef SQLITE_ENABLE_SORTER_REFERENCES
if( pItem->bSorterRef ){
i--;
n--;
}else
#endif
if( (flags & SQLITE_ECEL_REF)!=0 && (j = pItem->u.x.iOrderByCol)>0 ){
if( flags & SQLITE_ECEL_OMITREF ){
i--;