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Fix the [/info/df1d6482f9e92daf|UNION ALL flattener optimization] so that it

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works better with recursive CTEs.
dbsqlfuzz 88ed5c66789fced139d148aed823cba7c0926dd7

FossilOrigin-Name: f80d7bb2c305c1dd4658767660b33259032c048a91f18c654a6bda7332c54a0c
This commit is contained in:
drh
2021-04-26 21:23:01 +00:00
parent feef447271
commit c7f5077e88
4 changed files with 21 additions and 9 deletions
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5
src/select.c
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@@ -3767,7 +3767,10 @@ static void srclistRenumberCursors(
for(i=0, pItem=pSrc->a; i<pSrc->nSrc; i++, pItem++){
if( i!=iExcept ){
Select *p;
pItem->iCursor = aCsrMap[pItem->iCursor] = pParse->nTab++;
if( !pItem->fg.isRecursive || aCsrMap[pItem->iCursor]==0 ){
aCsrMap[pItem->iCursor] = pParse->nTab++;
}
pItem->iCursor = aCsrMap[pItem->iCursor];
for(p=pItem->pSelect; p; p=p->pPrior){
srclistRenumberCursors(pParse, aCsrMap, p->pSrc, -1);
}