event_data_objects.h

#ifndef _EVENT_DATA_OBJECTS_H_
#define _EVENT_DATA_OBJECTS_H_
/* Copyright (c) 2004, 2010, 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
   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,
   51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */

/**
  @addtogroup Event_Scheduler
  @{

  @file event_data_objects.h
*/

#include "event_parse_data.h"
#include "thr_lock.h"                           /* thr_lock_type */

class Field;
class THD;
class Time_zone;
struct TABLE;

class Event_queue_element_for_exec
{
public:
    Event_queue_element_for_exec() {};
    ~Event_queue_element_for_exec();

    bool
    init(LEX_STRING dbname, LEX_STRING name);

    LEX_STRING dbname;
    LEX_STRING name;
    bool dropped;
    THD *thd;

private:
    /* Prevent use of these */
    Event_queue_element_for_exec(const Event_queue_element_for_exec &);
    void operator=(Event_queue_element_for_exec &);
};


class Event_basic
{
protected:
    MEM_ROOT mem_root;

public:

    LEX_STRING dbname;
    LEX_STRING name;
    LEX_STRING definer;// combination of user and host

    Time_zone *time_zone;

    Event_basic();
    virtual ~Event_basic();

    virtual bool
    load_from_row(THD *thd, TABLE *table) = 0;

protected:
    bool
    load_string_fields(Field **fields, ...);

    bool
    load_time_zone(THD *thd, const LEX_STRING tz_name);
};



class Event_queue_element : public Event_basic
{
public:
    int on_completion;
    int status;
    longlong originator;

    my_time_t last_executed;
    my_time_t execute_at;
    my_time_t starts;
    my_time_t ends;
    my_bool starts_null;
    my_bool ends_null;
    my_bool execute_at_null;

    longlong expression;
    interval_type interval;

    bool dropped;

    uint execution_count;

    Event_queue_element();
    virtual ~Event_queue_element();

    virtual bool
    load_from_row(THD *thd, TABLE *table);

    bool
    compute_next_execution_time();

    void
    mark_last_executed(THD *thd);
};


class Event_timed : public Event_queue_element
{
    Event_timed(const Event_timed &);	/* Prevent use of these */
    void operator=(Event_timed &);

public:
    LEX_STRING body;

    LEX_STRING definer_user;
    LEX_STRING definer_host;

    LEX_STRING comment;

    ulonglong created;
    ulonglong modified;

    sql_mode_t sql_mode;

    class Stored_program_creation_ctx *creation_ctx;
    LEX_STRING body_utf8;

    Event_timed();
    virtual ~Event_timed();

    void
    init();

    virtual bool
    load_from_row(THD *thd, TABLE *table);

    int
    get_create_event(THD *thd, String *buf);
};


class Event_job_data : public Event_basic
{
public:
    LEX_STRING body;
    LEX_STRING definer_user;
    LEX_STRING definer_host;

    sql_mode_t sql_mode;

    class Stored_program_creation_ctx *creation_ctx;

    Event_job_data();

    virtual bool
    load_from_row(THD *thd, TABLE *table);

    bool
    execute(THD *thd, bool drop);
private:
    bool
    construct_sp_sql(THD *thd, String *sp_sql);
    bool
    construct_drop_event_sql(THD *thd, String *sp_sql);

    Event_job_data(const Event_job_data &);       /* Prevent use of these */
    void operator=(Event_job_data &);
};


/* Compares only the schema part of the identifier */
bool
event_basic_db_equal(LEX_STRING db, Event_basic *et);

/* Compares the whole identifier*/
bool
event_basic_identifier_equal(LEX_STRING db, LEX_STRING name, Event_basic *b);

/**
  @} (End of group Event_Scheduler)
*/

#endif /* _EVENT_DATA_OBJECTS_H_ */