/* Copyright (c) 2014, 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
  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 Street, Suite 500, Boston, MA 02110-1335 USA */

#ifndef TABLE_PREPARED_STMT_INSTANCES
#define TABLE_PREPARED_STMT_INSTANCES

/**
  @file storage/perfschema/table_prepared_stmt_instances.h
  Table PREPARED_STATEMENT_INSTANCE(declarations).
*/

#include "table_helper.h"
#include "pfs_prepared_stmt.h"

/**
  @addtogroup Performance_schema_tables
  @{
*/

/**
  A row of table
  PERFORMANCE_SCHEMA.PREPARED_STATEMENT_INSTANCES.
*/
struct row_prepared_stmt_instances
{
  /** Column OBJECT_INSTANCE_BEGIN. */
  const void *m_identity;

  /** Column STMT_ID. */
  ulonglong m_stmt_id;

  /** Column STMT_NAME. */
  char m_stmt_name[COL_INFO_SIZE];
  int m_stmt_name_length;

  /** Column SQL_TEXT. */
  char m_sql_text[COL_INFO_SIZE];
  int m_sql_text_length;

  /** Column OWNER_THREAD_ID. */
  ulonglong m_owner_thread_id;

  /** Column OWNER_EVENT_ID. */
  ulonglong m_owner_event_id;

  /** Column OWNER_OBJECT_TYPE. */
  enum_object_type m_owner_object_type;

  /** Column OWNER_OBJECT_SCHEMA */
  char m_owner_object_schema[COL_OBJECT_SCHEMA_SIZE];
  int m_owner_object_schema_length;

  /** Column OWNER_OBJECT_NAME */
  char m_owner_object_name[COL_OBJECT_NAME_SIZE];
  int m_owner_object_name_length;

  /** Columns TIMER_PREPARE. */
  PFS_stat_row m_prepare_stat;

  /** Columns COUNT_REPREPARE. */
  PFS_stat_row m_reprepare_stat;

  /** Columns COUNT_STAR...SUM_NO_GOOD_INDEX_USED. */
  PFS_statement_stat_row m_execute_stat;
};

/** Table PERFORMANCE_SCHEMA.PREPARED_STATEMENT_INSTANCES. */
class table_prepared_stmt_instances : public PFS_engine_table
{
public:
  /** Table share */
  static PFS_engine_table_share m_share;
  static PFS_engine_table* create();
  static int delete_all_rows();
  static ha_rows get_row_count();

  virtual int rnd_next();
  virtual int rnd_pos(const void *pos);
  virtual void reset_position(void);

protected:
  virtual int read_row_values(TABLE *table,
                              unsigned char *buf,
                              Field **fields,
                              bool read_all);

  table_prepared_stmt_instances();

public:
  ~table_prepared_stmt_instances()
  {}

protected:
  void make_row(PFS_prepared_stmt*);

private:
  /** Table share lock. */
  static THR_LOCK m_table_lock;
  /** Fields definition. */
  static TABLE_FIELD_DEF m_field_def;

  /** Current row. */
  row_prepared_stmt_instances m_row;
  /** True is the current row exists. */
  bool m_row_exists;
  /** Current position. */
  PFS_simple_index m_pos;
  /** Next position. */
  PFS_simple_index m_next_pos;
};

/** @} */
#endif