Remove the SF_Materialize flag from the SELECT object as it does not

accomplish anything useful.

FossilOrigin-Name: 65d5dcddbd34dfb2733a7a908c7c652ce2d610fe

src/delete.c

@@ -97,10 +97,8 @@ void sqlite3MaterializeView(
   SrcList *pFrom;
   sqlite3 *db = pParse->db;
   int iDb = sqlite3SchemaToIndex(db, pView->pSchema);
-
   pWhere = sqlite3ExprDup(db, pWhere, 0);
   pFrom = sqlite3SrcListAppend(db, 0, 0, 0);
-
   if( pFrom ){
     assert( pFrom->nSrc==1 );
     pFrom->a[0].zName = sqlite3DbStrDup(db, pView->zName);
@@ -108,10 +106,7 @@ void sqlite3MaterializeView(
     assert( pFrom->a[0].pOn==0 );
     assert( pFrom->a[0].pUsing==0 );
   }
-
   pSel = sqlite3SelectNew(pParse, 0, pFrom, pWhere, 0, 0, 0, 0, 0, 0);
-  if( pSel ) pSel->selFlags |= SF_Materialize;
-
   sqlite3SelectDestInit(&dest, SRT_EphemTab, iCur);
   sqlite3Select(pParse, pSel, &dest);
   sqlite3SelectDelete(db, pSel);

src/select.c

@@ -4552,8 +4552,8 @@ int sqlite3Select(
         p->selFlags |= SF_Aggregate;
       }
       i = -1;
-    }else if( pTabList->nSrc==1 && (p->selFlags & SF_Materialize)==0
-      && OptimizationEnabled(db, SQLITE_SubqCoroutine)
+    }else if( pTabList->nSrc==1
+           && OptimizationEnabled(db, SQLITE_SubqCoroutine)
     ){
       /* Implement a co-routine that will return a single row of the result
       ** set on each invocation.

src/sqliteInt.h

@@ -2161,7 +2161,7 @@ struct Select {
 #define SF_HasTypeInfo     0x0020  /* FROM subqueries have Table metadata */
 #define SF_UseSorter       0x0040  /* Sort using a sorter */
 #define SF_Values          0x0080  /* Synthesized from VALUES clause */
-#define SF_Materialize     0x0100  /* Force materialization of views */
+#define SF_Materialize     0x0100  /* NOT USED */
 #define SF_NestedFrom      0x0200  /* Part of a parenthesized FROM clause */
 #define SF_MaybeConvert    0x0400  /* Need convertCompoundSelectToSubquery() */
 #define SF_Recursive       0x0800  /* The recursive part of a recursive CTE */