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Avoid materializing columns of SF_NestedFrom subqueries that are never used.

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Other code improvements manually imported from the right-join-paren branch.

FossilOrigin-Name: cd8272fc2a34d1b245fd95208b9b601266ee7d2ff0f5ce52d03752f2c4e852a2
This commit is contained in:
drh
2022-04-21 13:11:26 +00:00
parent 22b410d894
commit 18f8600fe6
5 changed files with 83 additions and 66 deletions
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src/expr.c
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@@ -1631,6 +1631,7 @@ ExprList *sqlite3ExprListDup(sqlite3 *db, const ExprList *p, int flags){
pItem->eEName = pOldItem->eEName;
pItem->done = 0;
pItem->bNulls = pOldItem->bNulls;
pItem->bUsed = pOldItem->bUsed;
pItem->bSorterRef = pOldItem->bSorterRef;
pItem->u = pOldItem->u;
}