Have the ALTER TABLE code handle the case where an entire expression that includes a sub-select is excluded from a view, trigger or index.

FossilOrigin-Name: f2c8179f3c0b77f10da3f9b0771db4dec30d0bbf0b7f4751ce439bfb08da8f6f

src/alter.c

@@ -727,6 +727,20 @@ static int renameUnmapExprCb(Walker *pWalker, Expr *pExpr){
   return WRC_Continue;
 }
 
+/*
+** Walker callback used by sqlite3RenameExprUnmap().
+*/
+static int renameUnmapSelectCb(Walker *pWalker, Select *p){
+  if( p->pSrc ){
+    Parse *pParse = pWalker->pParse;
+    int i;
+    for(i=0; i<p->pSrc->nSrc; i++){
+      sqlite3RenameTokenRemap(pParse, 0, (void*)p->pSrc->a[0].zName);
+    }
+  }
+  return WRC_Continue;
+}
+
 /*
 ** Remove all nodes that are part of expression pExpr from the rename list.
 */
@@ -735,6 +749,7 @@ void sqlite3RenameExprUnmap(Parse *pParse, Expr *pExpr){
   memset(&sWalker, 0, sizeof(Walker));
   sWalker.pParse = pParse;
   sWalker.xExprCallback = renameUnmapExprCb;
+  sWalker.xSelectCallback = renameUnmapSelectCb;
   sqlite3WalkExpr(&sWalker, pExpr);
 }