Bug #11551: Asymmetric + undocumented behaviour of DROP VIEW and DROP TABLE

 
made DROP VIEW to continue on error and report an aggregated error 
 at its end. This makes it similar to DROP TABLE.


mysql-test/r/view.result:
  Bug #11551: Asymmetric + undocumented behaviour of DROP VIEW and DROP TABLE
   - test case
   - changed error message
mysql-test/t/view.test:
  Bug #11551: Asymmetric + undocumented behaviour of DROP VIEW and DROP TABLE
   - test case
sql/sql_view.cc:
  Bug #11551: Asymmetric + undocumented behaviour of DROP VIEW and DROP TABLE
   - made DROP VIEW to continue on error and report an aggregated error

mysql-test/r/view.result

@@ -193,7 +193,7 @@ c	d
 2	5
 3	10
 drop view v100;
-ERROR 42S02: Unknown table 'test.v100'
+ERROR 42S02: Unknown table 'v100'
 drop view t1;
 ERROR HY000: 'test.t1' is not VIEW
 drop table v1;
@@ -2820,3 +2820,22 @@ b
 c
 DROP VIEW v1, v2;
 DROP TABLE t1;
+CREATE TABLE t1 (id INT);
+CREATE VIEW v1 AS SELECT id FROM t1;
+SHOW TABLES;
+Tables_in_test
+t1
+v1
+DROP VIEW v2,v1;
+ERROR 42S02: Unknown table 'v2'
+SHOW TABLES;
+Tables_in_test
+t1
+CREATE VIEW v1 AS SELECT id FROM t1;
+DROP VIEW t1,v1;
+ERROR HY000: 'test.t1' is not VIEW
+SHOW TABLES;
+Tables_in_test
+t1
+DROP TABLE t1;
+DROP VIEW IF EXISTS v1;

mysql-test/t/view.test

@@ -2686,3 +2686,24 @@ INSERT INTO v2 (col) VALUES ('c');
 SELECT s1 FROM t1;
 DROP VIEW v1, v2;
 DROP TABLE t1;
+
+#
+# Bug #11551: Asymmetric + undocumented behaviour of DROP VIEW and DROP TABLE
+#
+CREATE TABLE t1 (id INT);
+CREATE VIEW v1 AS SELECT id FROM t1;
+SHOW TABLES;
+
+--error 1051
+DROP VIEW v2,v1;
+SHOW TABLES;
+
+CREATE VIEW v1 AS SELECT id FROM t1;
+--error 1347
+DROP VIEW t1,v1;
+SHOW TABLES;
+
+DROP TABLE t1;
+--disable_warnings
+DROP VIEW IF EXISTS v1;
+--enable_warnings

sql/sql_view.cc

@@ -1226,8 +1226,11 @@ bool mysql_drop_view(THD *thd, TABLE_LIST *views, enum_drop_mode drop_mode)
   DBUG_ENTER("mysql_drop_view");
   char path[FN_REFLEN];
   TABLE_LIST *view;
-  bool type= 0;
+  frm_type_enum type;
   db_type not_used;
+  String non_existant_views;
+  char *wrong_object_db= NULL, *wrong_object_name= NULL;
+  bool error= FALSE;
 
   for (view= views; view; view= view->next_local)
   {
@@ -1235,8 +1238,9 @@ bool mysql_drop_view(THD *thd, TABLE_LIST *views, enum_drop_mode drop_mode)
              view->table_name, reg_ext, NullS);
     (void) unpack_filename(path, path);
     VOID(pthread_mutex_lock(&LOCK_open));
-    if (access(path, F_OK) ||
-	(type= (mysql_frm_type(thd, path, &not_used) != FRMTYPE_VIEW)))
+    type= FRMTYPE_ERROR;
+    if (access(path, F_OK) || 
+        FRMTYPE_VIEW != (type= mysql_frm_type(thd, path, &not_used)))
     {
       char name[FN_REFLEN];
       my_snprintf(name, sizeof(name), "%s.%s", view->db, view->table_name);
@@ -1248,25 +1252,46 @@ bool mysql_drop_view(THD *thd, TABLE_LIST *views, enum_drop_mode drop_mode)
 	VOID(pthread_mutex_unlock(&LOCK_open));
 	continue;
       }
-      if (type)
-        my_error(ER_WRONG_OBJECT, MYF(0), view->db, view->table_name, "VIEW");
+      if (type == FRMTYPE_TABLE)
+      {
+        if (!wrong_object_name)
+        {
+          wrong_object_db= view->db;
+          wrong_object_name= view->table_name;
+        }
+      }
       else
-        my_error(ER_BAD_TABLE_ERROR, MYF(0), name);
-      goto err;
+      {
+        if (non_existant_views.length())
+          non_existant_views.append(',');
+        non_existant_views.append(String(view->table_name,system_charset_info));
+      }
+      VOID(pthread_mutex_unlock(&LOCK_open));
+      continue;
     }
     if (my_delete(path, MYF(MY_WME)))
-      goto err;
+      error= TRUE;
     query_cache_invalidate3(thd, view, 0);
     sp_cache_invalidate();
     VOID(pthread_mutex_unlock(&LOCK_open));
   }
+  if (error)
+  {
+    DBUG_RETURN(TRUE);
+  }
+  if (wrong_object_name)
+  {
+    my_error(ER_WRONG_OBJECT, MYF(0), wrong_object_db, wrong_object_name, 
+             "VIEW");
+    DBUG_RETURN(TRUE);
+  }
+  if (non_existant_views.length())
+  {
+    my_error(ER_BAD_TABLE_ERROR, MYF(0), non_existant_views.c_ptr());
+    DBUG_RETURN(TRUE);
+  }
   send_ok(thd);
   DBUG_RETURN(FALSE);
-
-err:
-  VOID(pthread_mutex_unlock(&LOCK_open));
-  DBUG_RETURN(TRUE);
-
 }