BUG#20449914: HANDLE_FATAL_SIGNAL (SIG=11) IN

FIELD_ITERATOR_TABLE::END_OF_FIELDS

Note: This a backport of the patch for bug#19894987
      to MySQL-5.5

sql/sql_base.cc

@@ -1648,13 +1648,20 @@ bool close_temporary_tables(THD *thd)
   if (!thd->temporary_tables)
     DBUG_RETURN(FALSE);
 
+  /*
+    Ensure we don't have open HANDLERs for tables we are about to close.
+    This is necessary when close_temporary_tables() is called as part
+    of execution of BINLOG statement (e.g. for format description event).
+  */
+  mysql_ha_rm_temporary_tables(thd);
   if (!mysql_bin_log.is_open())
   {
     TABLE *tmp_next;
-    for (table= thd->temporary_tables; table; table= tmp_next)
+    for (TABLE *t= thd->temporary_tables; t; t= tmp_next)
     {
-      tmp_next= table->next;
+      tmp_next= t->next;
-      close_temporary(table, 1, 1);
+      mysql_lock_remove(thd, thd->lock, t);
+      close_temporary(t, 1, 1);
     }
     thd->temporary_tables= 0;
     DBUG_RETURN(FALSE);
@@ -1744,6 +1751,7 @@ bool close_temporary_tables(THD *thd)
                           strlen(table->s->table_name.str));
         s_query.append(',');
         next= table->next;
+        mysql_lock_remove(thd, thd->lock, table);
         close_temporary(table, 1, 1);
       }
       thd->clear_error();

sql/sql_handler.cc

@@ -1,4 +1,4 @@
-/* Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
+/* Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -1002,3 +1002,49 @@ void mysql_ha_set_explicit_lock_duration(THD *thd)
   DBUG_VOID_RETURN;
 }
 
+
+/**
+  Remove temporary tables from the HANDLER's hash table. The reason
+  for having a separate function, rather than calling
+  mysql_ha_rm_tables() is that it is not always feasible (e.g. in
+  close_temporary_tables) to obtain a TABLE_LIST containing the
+  temporary tables.
+
+  @See close_temporary_tables
+  @param thd Thread identifier.
+*/
+void mysql_ha_rm_temporary_tables(THD *thd)
+{
+  DBUG_ENTER("mysql_ha_rm_temporary_tables");
+
+  TABLE_LIST *tmp_handler_tables= NULL;
+  for (uint i= 0; i < thd->handler_tables_hash.records; i++)
+  {
+    TABLE_LIST *handler_table= reinterpret_cast<TABLE_LIST*>
+      (my_hash_element(&thd->handler_tables_hash, i));
+
+    if (handler_table->table && handler_table->table->s->tmp_table)
+    {
+      handler_table->next_local= tmp_handler_tables;
+      tmp_handler_tables= handler_table;
+    }
+  }
+
+  while (tmp_handler_tables)
+  {
+    TABLE_LIST *nl= tmp_handler_tables->next_local;
+    mysql_ha_close_table(thd, tmp_handler_tables);
+    my_hash_delete(&thd->handler_tables_hash, (uchar*) tmp_handler_tables);
+    tmp_handler_tables= nl;
+  }
+
+  /*
+    Mark MDL_context as no longer breaking protocol if we have
+    closed last HANDLER.
+  */
+  if (thd->handler_tables_hash.records == 0)
+  {
+    thd->mdl_context.set_needs_thr_lock_abort(FALSE);
+  }
+  DBUG_VOID_RETURN;
+}

sql/sql_handler.h

@@ -1,4 +1,4 @@
-/* Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
+/* Copyright (c) 2006, 2015, Oracle and/or its affiliates. All rights reserved.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -32,5 +32,6 @@ void mysql_ha_flush_tables(THD *thd, TABLE_LIST *all_tables);
 void mysql_ha_rm_tables(THD *thd, TABLE_LIST *tables);
 void mysql_ha_cleanup(THD *thd);
 void mysql_ha_set_explicit_lock_duration(THD *thd);
+void mysql_ha_rm_temporary_tables(THD *thd);
 
 #endif /* SQL_HANDLER_INCLUDED */