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diff --git a/sql/event_db_repository.h b/sql/event_db_repository.h
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+#ifndef _EVENT_DB_REPOSITORY_H_
+#define _EVENT_DB_REPOSITORY_H_
+/* Copyright (c) 2006, 2011, Oracle and/or its affiliates.
+
+   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
+   the Free Software Foundation; version 2 of the License.
+
+   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 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
+*/
+
+/**
+  @addtogroup Event_Scheduler
+  @{
+
+  @file event_db_repository.h
+
+  Data Dictionary related operations of Event Scheduler.
+
+  This is a private header file of Events module. Please do not include it
+  directly. All public declarations of Events module should be stored in
+  events.h and event_data_objects.h.
+*/
+
+enum enum_events_table_field
+{
+  ET_FIELD_DB = 0, 
+  ET_FIELD_NAME,
+  ET_FIELD_BODY,
+  ET_FIELD_DEFINER,
+  ET_FIELD_EXECUTE_AT,
+  ET_FIELD_INTERVAL_EXPR,
+  ET_FIELD_TRANSIENT_INTERVAL,
+  ET_FIELD_CREATED,
+  ET_FIELD_MODIFIED,
+  ET_FIELD_LAST_EXECUTED,
+  ET_FIELD_STARTS,
+  ET_FIELD_ENDS,
+  ET_FIELD_STATUS,
+  ET_FIELD_ON_COMPLETION,
+  ET_FIELD_SQL_MODE,
+  ET_FIELD_COMMENT,
+  ET_FIELD_ORIGINATOR,
+  ET_FIELD_TIME_ZONE,
+  ET_FIELD_CHARACTER_SET_CLIENT,
+  ET_FIELD_COLLATION_CONNECTION,
+  ET_FIELD_DB_COLLATION,
+  ET_FIELD_BODY_UTF8,
+  ET_FIELD_COUNT /* a cool trick to count the number of fields :) */
+};
+
+
+int
+events_table_index_read_for_db(THD *thd, TABLE *schema_table,
+                               TABLE *event_table);
+
+int
+events_table_scan_all(THD *thd, TABLE *schema_table, TABLE *event_table);
+
+
+class Event_basic;
+class Event_parse_data;
+
+class Event_db_repository
+{
+public:
+  Event_db_repository() = default;
+
+  bool
+  create_event(THD *thd, Event_parse_data *parse_data,
+               bool *event_already_exists);
+  bool
+  update_event(THD *thd, Event_parse_data *parse_data, LEX_CSTRING *new_dbname,
+               LEX_CSTRING *new_name);
+
+  bool
+  drop_event(THD *thd, const LEX_CSTRING *db, const LEX_CSTRING *name,
+             bool drop_if_exists);
+
+  void
+  drop_schema_events(THD *thd, const LEX_CSTRING *schema);
+
+  bool
+  find_named_event(const LEX_CSTRING *db, const LEX_CSTRING *name,
+                   TABLE *table);
+
+  bool
+  load_named_event(THD *thd, const LEX_CSTRING *dbname,
+                   const LEX_CSTRING *name,
+                   Event_basic *et);
+
+  static bool
+  open_event_table(THD *thd, enum thr_lock_type lock_type, TABLE **table);
+
+  bool
+  fill_schema_events(THD *thd, TABLE_LIST *tables, const char *db);
+
+  bool
+  update_timing_fields_for_event(THD *thd,
+                                 const LEX_CSTRING *event_db_name,
+                                 const LEX_CSTRING *event_name,
+                                 my_time_t last_executed,
+                                 ulonglong status);
+public:
+  static bool
+  check_system_tables(THD *thd);
+private:
+  bool
+  index_read_for_db_for_i_s(THD *thd, TABLE *schema_table, TABLE *event_table,
+                            const char *db);
+
+  bool
+  table_scan_all_for_i_s(THD *thd, TABLE *schema_table, TABLE *event_table);
+
+private:
+  /* Prevent use of these */
+  Event_db_repository(const Event_db_repository &);
+  void operator=(Event_db_repository &);
+};
+
+/**
+  @} (End of group Event_Scheduler)
+*/
+#endif /* _EVENT_DB_REPOSITORY_H_ */