fixed "DROP table_open_in_handler" hang

mysql-test/r/handler.result

@@ -136,4 +136,10 @@ a	b
 handler t2 read last;
 You have an error in your SQL syntax.  Check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1
 handler t2 close;
-drop table if exists t1;
+handler t1 open as t2;
+drop table t1;
+create table t1 (a int);
+insert into t1 values (17);
+handler t2 read first;
+Unknown table 't2' in HANDLER
+drop table t1;

mysql-test/t/handler.test

@@ -28,13 +28,15 @@ handler t2 read a next;
 handler t2 read a=(15);
 handler t2 read a=(16);
 
-!$1070 handler t2 read a=(19,"fff");
+--error 1070
+handler t2 read a=(19,"fff");
 
 handler t2 read b=(19,"fff");
 handler t2 read b=(19,"yyy");
 handler t2 read b=(19);
 
-!$1109 handler t1 read a last;
+--error 1109
+handler t1 read a last;
 
 handler t2 read a=(11);
 handler t2 read a>=(11);
@@ -60,8 +62,19 @@ handler t2 read first;
 handler t2 read next;
 alter table t1 type=MyISAM;
 handler t2 read next;
-!$1064 handler t2 read last;
+--error 1064
+handler t2 read last;
 
 handler t2 close;
-drop table if exists t1;
+
+#
+# DROP TABLE
+#
+handler t1 open as t2;
+drop table t1;
+create table t1 (a int);
+insert into t1 values (17);
+--error 1109
+handler t2 read first;
+drop table t1;
 

sql/mysql_priv.h

@@ -501,6 +501,7 @@ int mysqld_show(THD *thd, const char *wild, show_var_st *variables,
 /* sql_handler.cc */
 int mysql_ha_open(THD *thd, TABLE_LIST *tables);
 int mysql_ha_close(THD *thd, TABLE_LIST *tables, bool dont_send_ok=0);
+int mysql_ha_closeall(THD *thd, TABLE_LIST *tables, bool dont_send_ok=0);
 int mysql_ha_read(THD *, TABLE_LIST *,enum enum_ha_read_modes,char *,
                List<Item> *,enum ha_rkey_function,Item *,ha_rows,ha_rows);
 

sql/sql_handler.cc

@@ -43,8 +43,8 @@
   thd->open_tables=thd->handler_tables; \
   thd->handler_tables=tmp; }
 
-static TABLE **find_table_ptr_by_name(THD *thd, const char *db,
-				      const char *table_name);
+static TABLE **find_table_ptr_by_name(THD *thd,const char *db,
+				      const char *table_name, bool is_alias);
 
 int mysql_ha_open(THD *thd, TABLE_LIST *tables)
 {
@@ -68,7 +68,7 @@ int mysql_ha_open(THD *thd, TABLE_LIST *tables)
 
 int mysql_ha_close(THD *thd, TABLE_LIST *tables, bool dont_send_ok)
 {
-  TABLE **ptr=find_table_ptr_by_name(thd, tables->db, tables->alias);
+  TABLE **ptr=find_table_ptr_by_name(thd, tables->db, tables->alias, 1);
 
   if (*ptr)
   {
@@ -87,6 +87,21 @@ int mysql_ha_close(THD *thd, TABLE_LIST *tables, bool dont_send_ok)
   return 0;
 }
 
+int mysql_ha_closeall(THD *thd, TABLE_LIST *tables, bool dont_send_ok)
+{
+  TABLE **ptr=find_table_ptr_by_name(thd, tables->db, tables->real_name, 0);
+
+  DBUG_ASSERT(dont_send_ok);
+  if (*ptr)
+  {
+//    if (!dont_send_ok) VOID(pthread_mutex_lock(&LOCK_open));
+    close_thread_table(thd, ptr);
+//    if (!dont_send_ok) VOID(pthread_mutex_unlock(&LOCK_open));
+  }
+//  if (!dont_send_ok) send_ok(&thd->net);
+  return 0;
+}
+
 static enum enum_ha_read_modes rkey_to_rnext[]=
     { RNEXT, RNEXT, RPREV, RNEXT, RPREV, RNEXT, RPREV };
 
@@ -97,7 +112,7 @@ int mysql_ha_read(THD *thd, TABLE_LIST *tables,
     ha_rows select_limit,ha_rows offset_limit)
 {
   int err, keyno=-1;
-  TABLE *table=*find_table_ptr_by_name(thd, tables->db, tables->alias);
+  TABLE *table=*find_table_ptr_by_name(thd, tables->db, tables->alias, 1);
   if (!table)
   {
     my_printf_error(ER_UNKNOWN_TABLE,ER(ER_UNKNOWN_TABLE),MYF(0),
@@ -250,17 +265,8 @@ err0:
   return -1;
 }
 
-/**************************************************************************
-   2Monty: It could easily happen, that the following service functions are
-   already defined somewhere in the code, but I failed to find them.
-   If this is the case, just say a word and I'll use old functions here.
-**************************************************************************/
-
-/* Note: this function differs from find_locked_table() because we're looking
-   here for alias, not real table name
- */
 static TABLE **find_table_ptr_by_name(THD *thd, const char *db,
-				      const char *alias)
+				      const char *table_name, bool is_alias)
 {
   int dblen;
   TABLE **ptr;
@@ -273,9 +279,10 @@ static TABLE **find_table_ptr_by_name(THD *thd, const char *db,
   for (TABLE *table=*ptr; table ; table=*ptr)
   {
     if (!memcmp(table->table_cache_key, db, dblen) &&
-        !my_strcasecmp(table->table_name,alias))
+        !my_strcasecmp((is_alias ? table->table_name : table->real_name),table_name))
       break;
     ptr=&(table->next);
   }
   return ptr;
 }
+

sql/sql_table.cc

@@ -136,6 +136,7 @@ int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists,
   for (table=tables ; table ; table=table->next)
   {
     char *db=table->db ? table->db : thd->db;
+    mysql_ha_closeall(thd, table, 1);
     if (!close_temporary_table(thd, db, table->real_name))
     {
       tmp_table_deleted=1;