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Activate the ability to use expressions in indexes in a query. There are some

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test failures, but mostly this seems to work.

FossilOrigin-Name: 42f93f582eccd8a778189aa6c113874f995ab751
This commit is contained in:
drh
2015-08-27 18:24:02 +00:00
parent b377020ca9
commit 6860e6fa6f
6 changed files with 27 additions and 12 deletions
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7
src/where.c
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@@ -180,10 +180,13 @@ static WhereTerm *whereScanNext(WhereScan *pScan){
while( pScan->iEquiv<=pScan->nEquiv ){
iCur = pScan->aiCur[pScan->iEquiv-1];
iColumn = pScan->aiColumn[pScan->iEquiv-1];
assert( iColumn!=(-2) || pScan->pIdxExpr!=0 );
while( (pWC = pScan->pWC)!=0 ){
for(pTerm=pWC->a+k; k<pWC->nTerm; k++, pTerm++){
if( pTerm->leftCursor==iCur
&& pTerm->u.leftColumn==iColumn
&& (iColumn!=(-2)
|| sqlite3ExprCompare(pTerm->pExpr->pLeft,pScan->pIdxExpr,iCur)==0)
&& (pScan->iEquiv<=1 || !ExprHasProperty(pTerm->pExpr, EP_FromJoin))
){
if( (pTerm->eOperator & WO_EQUIV)!=0
@@ -273,9 +276,11 @@ static WhereTerm *whereScanInit(
/* memset(pScan, 0, sizeof(*pScan)); */
pScan->pOrigWC = pWC;
pScan->pWC = pWC;
pScan->pIdxExpr = 0;
if( pIdx ){
j = iColumn;
iColumn = pIdx->aiColumn[j];
if( iColumn==(-2) ) pScan->pIdxExpr = pIdx->aColExpr->a[j].pExpr;
}
if( pIdx && iColumn>=0 ){
pScan->idxaff = pIdx->pTable->aCol[iColumn].affinity;
@@ -2224,7 +2229,7 @@ static int whereLoopAddBtreeIndex(
int iCol = pProbe->aiColumn[saved_nEq];
pNew->wsFlags |= WHERE_COLUMN_EQ;
assert( saved_nEq==pNew->u.btree.nEq );
if( iCol==(-1) || (nInMul==0 && saved_nEq==pProbe->nKeyCol-1) ){
if( iCol==(-1) || (iCol>0 && nInMul==0 && saved_nEq==pProbe->nKeyCol-1) ){
if( iCol>=0 && pProbe->uniqNotNull==0 ){
pNew->wsFlags |= WHERE_UNQ_WANTED;
}else{