MySQL 8.1.0
Source Code Documentation
status_var.h
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1/* Copyright (c) 2017, 2023, Oracle and/or its affiliates.
2
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4 it under the terms of the GNU General Public License, version 2.0,
5 as published by the Free Software Foundation.
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9 as designated in a particular file or component or in included license
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12 separately licensed software that they have included with MySQL.
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15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License, version 2.0, for more details.
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20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
22
23#ifndef status_var_h
24#define status_var_h
25
26/**
27 Declarations for SHOW STATUS support in plugins
28*/
32 SHOW_INT, ///< shown as _unsigned_ int
33 SHOW_LONG, ///< shown as _unsigned_ long
34 SHOW_LONGLONG, ///< shown as _unsigned_ longlong
40 /*
41 This include defines server-only values of the enum.
42 Using them in plugins is not supported.
43 */
55 /*
56 Support for signed values are extended for plugins.
57 */
61};
62
63/**
64 Status variable scope.
65 Only GLOBAL status variable scope is available in plugins.
66*/
70 /* Server-only values. Not supported in plugins. */
73};
74
75/**
76 SHOW STATUS Server status variable
77*/
78struct SHOW_VAR {
79 const char *name;
80 char *value;
83};
84
85#define SHOW_VAR_MAX_NAME_LEN 64
86#define SHOW_VAR_FUNC_BUFF_SIZE 1024
87#ifdef __cplusplus
88class THD;
89#define MYSQL_THD THD *
90#else
91#define MYSQL_THD void *
92#endif
93typedef int (*mysql_show_var_func)(MYSQL_THD, SHOW_VAR *, char *);
94
95#endif
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_lexer_thd.h:33
#define MYSQL_THD
Definition: status_var.h:89
enum_mysql_show_type
Declarations for SHOW STATUS support in plugins.
Definition: status_var.h:29
@ SHOW_DOUBLE
Definition: status_var.h:39
@ SHOW_LONG
shown as unsigned long
Definition: status_var.h:33
@ SHOW_ARRAY
Definition: status_var.h:37
@ SHOW_FUNC
Definition: status_var.h:38
@ SHOW_CHAR_PTR
Definition: status_var.h:36
@ SHOW_KEY_CACHE_LONGLONG
Definition: status_var.h:45
@ SHOW_MY_BOOL
Definition: status_var.h:49
@ SHOW_CHAR
Definition: status_var.h:35
@ SHOW_LONGLONG_STATUS
Definition: status_var.h:53
@ SHOW_SIGNED_INT
Definition: status_var.h:58
@ SHOW_LEX_STRING
Definition: status_var.h:54
@ SHOW_KEY_CACHE_LONG
Definition: status_var.h:44
@ SHOW_LONG_STATUS
Definition: status_var.h:46
@ SHOW_HAVE
Definition: status_var.h:48
@ SHOW_BOOL
Definition: status_var.h:31
@ SHOW_LONG_NOFLUSH
Definition: status_var.h:52
@ SHOW_DOUBLE_STATUS
Definition: status_var.h:47
@ SHOW_HA_ROWS
Definition: status_var.h:50
@ SHOW_LONGLONG
shown as unsigned longlong
Definition: status_var.h:34
@ SHOW_INT
shown as unsigned int
Definition: status_var.h:32
@ SHOW_SYS
Definition: status_var.h:51
@ SHOW_UNDEF
Definition: status_var.h:30
@ SHOW_SIGNED_LONG
Definition: status_var.h:59
@ SHOW_SIGNED_LONGLONG
Definition: status_var.h:60
int(* mysql_show_var_func)(MYSQL_THD, SHOW_VAR *, char *)
Definition: status_var.h:93
enum_mysql_show_scope
Status variable scope.
Definition: status_var.h:67
@ SHOW_SCOPE_GLOBAL
Definition: status_var.h:69
@ SHOW_SCOPE_SESSION
Definition: status_var.h:71
@ SHOW_SCOPE_ALL
Definition: status_var.h:72
@ SHOW_SCOPE_UNDEF
Definition: status_var.h:68
SHOW STATUS Server status variable.
Definition: status_var.h:78
enum enum_mysql_show_scope scope
Definition: status_var.h:82
char * value
Definition: status_var.h:80
enum enum_mysql_show_type type
Definition: status_var.h:81
const char * name
Definition: status_var.h:79