Index: src/resolve.c
==================================================================
--- src/resolve.c
+++ src/resolve.c
@@ -758,60 +758,62 @@
           notValid(pParse, pNC, "non-deterministic functions",
                    NC_IdxExpr|NC_PartIdx);
         }
       }
 
+      if( 0==IN_RENAME_COLUMN ){
 #ifndef SQLITE_OMIT_WINDOWFUNC
-      assert( is_agg==0 || (pDef->funcFlags & SQLITE_FUNC_MINMAX)
+        assert( is_agg==0 || (pDef->funcFlags & SQLITE_FUNC_MINMAX)
           || (pDef->xValue==0 && pDef->xInverse==0)
           || (pDef->xValue && pDef->xInverse && pDef->xSFunc && pDef->xFinalize)
-      );
-      if( pDef && pDef->xValue==0 && pExpr->pWin ){
-        sqlite3ErrorMsg(pParse, 
-            "%.*s() may not be used as a window function", nId, zId
-        );
-        pNC->nErr++;
-      }else if( 
-            (is_agg && (pNC->ncFlags & NC_AllowAgg)==0)
-         || (is_agg && (pDef->funcFlags & SQLITE_FUNC_WINDOW) && !pExpr->pWin)
-         || (is_agg && pExpr->pWin && (pNC->ncFlags & NC_AllowWin)==0)
-      ){
-        const char *zType;
-        if( (pDef->funcFlags & SQLITE_FUNC_WINDOW) || pExpr->pWin ){
-          zType = "window";
-        }else{
-          zType = "aggregate";
-        }
-        sqlite3ErrorMsg(pParse, "misuse of %s function %.*s()", zType, nId,zId);
-        pNC->nErr++;
-        is_agg = 0;
-      }
+        );
+        if( pDef && pDef->xValue==0 && pExpr->pWin ){
+          sqlite3ErrorMsg(pParse, 
+              "%.*s() may not be used as a window function", nId, zId
+          );
+          pNC->nErr++;
+        }else if( 
+              (is_agg && (pNC->ncFlags & NC_AllowAgg)==0)
+           || (is_agg && (pDef->funcFlags & SQLITE_FUNC_WINDOW) && !pExpr->pWin)
+           || (is_agg && pExpr->pWin && (pNC->ncFlags & NC_AllowWin)==0)
+        ){
+          const char *zType;
+          if( (pDef->funcFlags & SQLITE_FUNC_WINDOW) || pExpr->pWin ){
+            zType = "window";
+          }else{
+            zType = "aggregate";
+          }
+          sqlite3ErrorMsg(pParse, "misuse of %s function %.*s()",zType,nId,zId);
+          pNC->nErr++;
+          is_agg = 0;
+        }
 #else
-      if( (is_agg && (pNC->ncFlags & NC_AllowAgg)==0) ){
-        sqlite3ErrorMsg(pParse, "misuse of aggregate function %.*s()", nId,zId);
-        pNC->nErr++;
-        is_agg = 0;
-      }
+        if( (is_agg && (pNC->ncFlags & NC_AllowAgg)==0) ){
+          sqlite3ErrorMsg(pParse,"misuse of aggregate function %.*s()",nId,zId);
+          pNC->nErr++;
+          is_agg = 0;
+        }
 #endif
-      else if( no_such_func && pParse->db->init.busy==0
+        else if( no_such_func && pParse->db->init.busy==0 && !IN_RENAME_COLUMN
 #ifdef SQLITE_ENABLE_UNKNOWN_SQL_FUNCTION
-                && pParse->explain==0
+                  && pParse->explain==0
 #endif
-      ){
-        sqlite3ErrorMsg(pParse, "no such function: %.*s", nId, zId);
-        pNC->nErr++;
-      }else if( wrong_num_args ){
-        sqlite3ErrorMsg(pParse,"wrong number of arguments to function %.*s()",
-             nId, zId);
-        pNC->nErr++;
-      }
-      if( is_agg ){
+        ){
+          sqlite3ErrorMsg(pParse, "no such function: %.*s", nId, zId);
+          pNC->nErr++;
+        }else if( wrong_num_args ){
+          sqlite3ErrorMsg(pParse,"wrong number of arguments to function %.*s()",
+               nId, zId);
+          pNC->nErr++;
+        }
+        if( is_agg ){
 #ifndef SQLITE_OMIT_WINDOWFUNC
-        pNC->ncFlags &= ~(pExpr->pWin ? NC_AllowWin : NC_AllowAgg);
+          pNC->ncFlags &= ~(pExpr->pWin ? NC_AllowWin : NC_AllowAgg);
 #else
-        pNC->ncFlags &= ~NC_AllowAgg;
+          pNC->ncFlags &= ~NC_AllowAgg;
 #endif
+        }
       }
       sqlite3WalkExprList(pWalker, pList);
       if( is_agg ){
 #ifndef SQLITE_OMIT_WINDOWFUNC
         if( pExpr->pWin ){

Index: test/altercol.test
==================================================================
--- test/altercol.test
+++ test/altercol.test
@@ -331,10 +331,30 @@
 } {{CREATE VIEW zzz AS SELECT george, ringo FROM b1}}
 
 #-------------------------------------------------------------------------
 # More triggers.
 #
+proc do_rename_column_test {tn old new lSchema} {
+  reset_db
+  set lSorted [list]
+  foreach sql $lSchema { 
+    execsql $sql 
+    lappend lSorted [string trim $sql]
+  }
+  set lSorted [lsort $lSorted]
+
+  do_execsql_test $tn.1 {
+    SELECT sql FROM sqlite_master WHERE sql!='' ORDER BY 1
+  } $lSorted
+
+  do_execsql_test $tn.2 "ALTER TABLE t1 RENAME $old TO $new"
+
+  do_execsql_test $tn.3 {
+    SELECT sql FROM sqlite_master ORDER BY 1
+  } [string map [list $old $new] $lSorted]
+}
+
 foreach {tn old new lSchema} {
   1 _x_ _xxx_ {
     { CREATE TABLE t1(a, b, _x_) }
     { CREATE TRIGGER AFTER INSERT ON t1 BEGIN
         SELECT _x_ FROM t1;
@@ -363,28 +383,35 @@
         INSERT INTO t1 VALUES(new.a, new.b, new._x_)
           ON CONFLICT (_x_) WHERE _x_>10 DO UPDATE SET _x_ = _x_+1;
       END }
   }
 } {
-  reset_db
-  set lSorted [list]
-  foreach sql $lSchema { 
-    execsql $sql 
-    lappend lSorted [string trim $sql]
-  }
-  set lSorted [lsort $lSorted]
-
-  do_execsql_test 9.$tn.1 {
-    SELECT sql FROM sqlite_master WHERE sql!='' ORDER BY 1
-  } $lSorted
-
-if { $tn==3 } breakpoint
-  do_execsql_test 9.$tn.2 "ALTER TABLE t1 RENAME $old TO $new"
-
-  do_execsql_test 9.$tn.1 {
-    SELECT sql FROM sqlite_master ORDER BY 1
-  } [string map [list $old $new] $lSorted]
-}
-
-reset_db
+  do_rename_column_test 9.$tn $old $new $lSchema
+}
+
+#-------------------------------------------------------------------------
+# Test that views can be edited even if there are missing collation 
+# sequences or user defined functions.
+#
+reset_db
+
+foreach {tn old new lSchema} {
+  1 _x_ _xxx_ {
+    { CREATE TABLE t1(a, b, _x_) }
+    { CREATE VIEW v1 AS SELECT a, b, _x_ FROM t1 WHERE _x_='abc' COLLATE xyz }
+  }
+
+  2 _x_ _xxx_ {
+    { CREATE TABLE t1(a, b, _x_) }
+    { CREATE VIEW v1 AS SELECT a, b, _x_ FROM t1 WHERE scalar(_x_) }
+  }
+
+  3 _x_ _xxx_ {
+    { CREATE TABLE t1(a, b, _x_) }
+    { CREATE VIEW v1 AS SELECT a, b, _x_ FROM t1 WHERE _x_ = unicode(1, 2, 3) }
+  }
+} {
+  do_rename_column_test 10.$tn $old $new $lSchema
+}
+
 
 finish_test