status_variables_bits.h

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/* Copyright (c) 2024, 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, version 2.0,
  as published by the Free Software Foundation.
 
  This program is designed to work 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 either included with
  the program or referenced in the documentation.
 
  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
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  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
 
#ifndef COMPONENTS_SERVICES_BITS_STATUS_VARIABLES_BITS_H
#define COMPONENTS_SERVICES_BITS_STATUS_VARIABLES_BITS_H
 
#include "mysql/components/services/bits/thd.h"
 
/**
  Declarations for SHOW STATUS support in plugins
*/
enum enum_mysql_show_type {
  SHOW_UNDEF,
  SHOW_BOOL,
  SHOW_INT,       ///< shown as _unsigned_ int
  SHOW_LONG,      ///< shown as _unsigned_ long
  SHOW_LONGLONG,  ///< shown as _unsigned_ longlong
  SHOW_CHAR,
  SHOW_CHAR_PTR,
  SHOW_ARRAY,
  SHOW_FUNC,
  SHOW_DOUBLE,
  /*
    This include defines server-only values of the enum.
    Using them in plugins is not supported.
  */
  SHOW_KEY_CACHE_LONG,
  SHOW_KEY_CACHE_LONGLONG,
  SHOW_LONG_STATUS,
  SHOW_DOUBLE_STATUS,
  SHOW_HAVE,
  SHOW_MY_BOOL,
  SHOW_HA_ROWS,
  SHOW_SYS,
  SHOW_LONG_NOFLUSH,
  SHOW_LONGLONG_STATUS,
  SHOW_LEX_STRING,
  /*
    Support for signed values are extended for plugins.
  */
  SHOW_SIGNED_INT,
  SHOW_SIGNED_LONG,
  SHOW_SIGNED_LONGLONG
};
 
/**
  Status variable scope.
  Only GLOBAL status variable scope is available in plugins.
*/
enum enum_mysql_show_scope {
  SHOW_SCOPE_UNDEF,
  SHOW_SCOPE_GLOBAL,
  /* Server-only values. Not supported in plugins. */
  SHOW_SCOPE_SESSION,
  SHOW_SCOPE_ALL
};
 
/**
  SHOW STATUS Server status variable
*/
struct SHOW_VAR {
  const char *name;
  char *value;
  enum enum_mysql_show_type type;
  enum enum_mysql_show_scope scope;
};
 
#define SHOW_VAR_MAX_NAME_LEN 64
#define SHOW_VAR_FUNC_BUFF_SIZE 1024
 
typedef int (*mysql_show_var_func)(MYSQL_THD, SHOW_VAR *, char *);
 
#endif /* COMPONENTS_SERVICES_BITS_STATUS_VARIABLES_BITS_H */