mariadb/storage/perfschema/table_session_connect.h

/* Copyright (c) 2012, 2013, 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 */

#ifndef TABLE_SESSION_CONNECT_H
#define TABLE_SESSION_CONNECT_H

#include "pfs_column_types.h"
#include "cursor_by_thread_connect_attr.h"
#include "table_helper.h"

#define MAX_ATTR_NAME_CHARS 32
#define MAX_ATTR_VALUE_CHARS 1024
#define MAX_UTF8_BYTES 6

/** symbolic names for field offsets, keep in sync with field_types */
enum field_offsets {
  FO_PROCESS_ID,
  FO_ATTR_NAME,
  FO_ATTR_VALUE,
  FO_ORDINAL_POSITION
};

/**
  A row of PERFORMANCE_SCHEMA.SESSION_CONNECT_ATTRS and
  PERFORMANCE_SCHEMA.SESSION_ACCOUNT_CONNECT_ATTRS.
*/
struct row_session_connect_attrs
{
  /** Column PROCESS_ID. */
  ulong m_process_id;
  /** Column ATTR_NAME. In UTF-8 */
  char m_attr_name[MAX_ATTR_NAME_CHARS * MAX_UTF8_BYTES];
  /** Length in bytes of @c m_attr_name. */
  uint m_attr_name_length;
  /** Column ATTR_VALUE. In UTF-8 */
  char m_attr_value[MAX_ATTR_VALUE_CHARS * MAX_UTF8_BYTES];
  /** Length in bytes of @c m_attr_name. */
  uint m_attr_value_length;
  /** Column ORDINAL_POSITION. */
  ulong m_ordinal_position;
};

class table_session_connect : public cursor_by_thread_connect_attr
{
protected:
  table_session_connect(const PFS_engine_table_share *share);

public:
  ~table_session_connect();

protected:
  virtual void make_row(PFS_thread *pfs, uint ordinal);
  virtual bool thread_fits(PFS_thread *thread);
  virtual int read_row_values(TABLE *table, unsigned char *buf,
                              Field **fields, bool read_all);
protected:
  /** Fields definition. */
  static TABLE_FIELD_DEF m_field_def;
  /** Current row. */
  row_session_connect_attrs m_row;
  /** Safe copy of @c PFS_thread::m_session_connect_attrs. */
  char *m_copy_session_connect_attrs;
  /** Safe copy of @c PFS_thread::m_session_connect_attrs_length. */
  uint m_copy_session_connect_attrs_length;
};

/** @} */
#endif