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diff --git a/storage/perfschema/pfs_events_stages.h b/storage/perfschema/pfs_events_stages.h
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+/* Copyright (c) 2010, 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, version 2.0,
+  as published by the Free Software Foundation.
+
+  This program is also distributed with certain software (including
+  but not limited to OpenSSL) that is licensed under separate terms,
+  as designated in a particular file or component or in included license
+  documentation.  The authors of MySQL hereby grant you an additional
+  permission to link the program and your derivative works with the
+  separately licensed software that they have included with MySQL.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License, version 2.0, for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA */
+
+#ifndef PFS_EVENTS_STAGES_H
+#define PFS_EVENTS_STAGES_H
+
+/**
+  @file storage/perfschema/pfs_events_stages.h
+  Events waits data structures (declarations).
+*/
+
+#include "pfs_events.h"
+
+struct PFS_thread;
+struct PFS_account;
+struct PFS_user;
+struct PFS_host;
+
+/** A stage record. */
+struct PFS_events_stages : public PFS_events
+{
+  PSI_stage_progress m_progress;
+};
+
+void insert_events_stages_history(PFS_thread *thread, PFS_events_stages *stage);
+void insert_events_stages_history_long(PFS_events_stages *stage);
+
+extern bool flag_events_stages_current;
+extern bool flag_events_stages_history;
+extern bool flag_events_stages_history_long;
+
+extern bool events_stages_history_long_full;
+extern PFS_ALIGNED PFS_cacheline_uint32 events_stages_history_long_index;
+extern PFS_events_stages *events_stages_history_long_array;
+extern ulong events_stages_history_long_size;
+
+int init_events_stages_history_long(uint events_stages_history_long_sizing);
+void cleanup_events_stages_history_long();
+
+void reset_events_stages_current();
+void reset_events_stages_history();
+void reset_events_stages_history_long();
+void reset_events_stages_by_thread();
+void reset_events_stages_by_account();
+void reset_events_stages_by_user();
+void reset_events_stages_by_host();
+void reset_events_stages_global();
+void aggregate_account_stages(PFS_account *account);
+void aggregate_user_stages(PFS_user *user);
+void aggregate_host_stages(PFS_host *host);
+
+#endif
+