Merge changes from trunk into the alter-table-drop-column branch.

FossilOrigin-Name: 9ea640073f8809dfe2612ae1ea384a938b433f884c54d9e5aa3712de79397ac1

src/select.c

@@ -2086,6 +2086,7 @@ void sqlite3SelectAddColumnTypeAndCollation(
   for(i=0, pCol=pTab->aCol; i<pTab->nCol; i++, pCol++){
     const char *zType;
     int n, m;
+    pTab->tabFlags |= (pCol->colFlags & COLFLAG_NOINSERT);
     p = a[i].pExpr;
     zType = columnType(&sNC, p, 0, 0, 0);
     /* pCol->szEst = ... // Column size est for SELECT tables never used */
@@ -5793,6 +5794,15 @@ static struct SrcList_item *isSelfJoinView(
   return 0;
 }
 
+/*
+** Deallocate a single AggInfo object
+*/
+static void agginfoFree(sqlite3 *db, AggInfo *p){
+  sqlite3DbFree(db, p->aCol);
+  sqlite3DbFree(db, p->aFunc);
+  sqlite3DbFreeNN(db, p);
+}
+
 #ifdef SQLITE_COUNTOFVIEW_OPTIMIZATION
 /*
 ** Attempt to transform a query of the form
@@ -6537,11 +6547,13 @@ int sqlite3Select(
     ** SELECT statement.
     */
     pAggInfo = sqlite3DbMallocZero(db, sizeof(*pAggInfo) );
-    if( pAggInfo==0 ){
+    if( pAggInfo ){
+      sqlite3ParserAddCleanup(pParse,
+          (void(*)(sqlite3*,void*))agginfoFree, pAggInfo);
+    }
+    if( db->mallocFailed ){
       goto select_end;
     }
-    pAggInfo->pNext = pParse->pAggList;
-    pParse->pAggList = pAggInfo;
     pAggInfo->selId = p->selId;
     memset(&sNC, 0, sizeof(sNC));
     sNC.pParse = pParse;