MySQL 8.4.3
Source Code Documentation
status_var.h
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1/* Copyright (c) 2017, 2024, Oracle and/or its affiliates.
2
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17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License, version 2.0, for more details.
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21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
23
24#ifndef status_var_h
25#define status_var_h
26
27/**
28 Declarations for SHOW STATUS support in plugins
29*/
33 SHOW_INT, ///< shown as _unsigned_ int
34 SHOW_LONG, ///< shown as _unsigned_ long
35 SHOW_LONGLONG, ///< shown as _unsigned_ longlong
41 /*
42 This include defines server-only values of the enum.
43 Using them in plugins is not supported.
44 */
56 /*
57 Support for signed values are extended for plugins.
58 */
62};
63
64/**
65 Status variable scope.
66 Only GLOBAL status variable scope is available in plugins.
67*/
71 /* Server-only values. Not supported in plugins. */
74};
75
76/**
77 SHOW STATUS Server status variable
78*/
79struct SHOW_VAR {
80 const char *name;
81 char *value;
84};
85
86#define SHOW_VAR_MAX_NAME_LEN 64
87#define SHOW_VAR_FUNC_BUFF_SIZE 1024
88#ifdef __cplusplus
89class THD;
90#define MYSQL_THD THD *
91#else
92#define MYSQL_THD void *
93#endif
94typedef int (*mysql_show_var_func)(MYSQL_THD, SHOW_VAR *, char *);
95
96#endif
For each client connection we create a separate thread with THD serving as a thread/connection descri...
Definition: sql_lexer_thd.h:36
#define MYSQL_THD
Definition: status_var.h:90
enum_mysql_show_type
Declarations for SHOW STATUS support in plugins.
Definition: status_var.h:30
@ SHOW_DOUBLE
Definition: status_var.h:40
@ SHOW_LONG
shown as unsigned long
Definition: status_var.h:34
@ SHOW_ARRAY
Definition: status_var.h:38
@ SHOW_FUNC
Definition: status_var.h:39
@ SHOW_CHAR_PTR
Definition: status_var.h:37
@ SHOW_KEY_CACHE_LONGLONG
Definition: status_var.h:46
@ SHOW_MY_BOOL
Definition: status_var.h:50
@ SHOW_CHAR
Definition: status_var.h:36
@ SHOW_LONGLONG_STATUS
Definition: status_var.h:54
@ SHOW_SIGNED_INT
Definition: status_var.h:59
@ SHOW_LEX_STRING
Definition: status_var.h:55
@ SHOW_KEY_CACHE_LONG
Definition: status_var.h:45
@ SHOW_LONG_STATUS
Definition: status_var.h:47
@ SHOW_HAVE
Definition: status_var.h:49
@ SHOW_BOOL
Definition: status_var.h:32
@ SHOW_LONG_NOFLUSH
Definition: status_var.h:53
@ SHOW_DOUBLE_STATUS
Definition: status_var.h:48
@ SHOW_HA_ROWS
Definition: status_var.h:51
@ SHOW_LONGLONG
shown as unsigned longlong
Definition: status_var.h:35
@ SHOW_INT
shown as unsigned int
Definition: status_var.h:33
@ SHOW_SYS
Definition: status_var.h:52
@ SHOW_UNDEF
Definition: status_var.h:31
@ SHOW_SIGNED_LONG
Definition: status_var.h:60
@ SHOW_SIGNED_LONGLONG
Definition: status_var.h:61
int(* mysql_show_var_func)(MYSQL_THD, SHOW_VAR *, char *)
Definition: status_var.h:94
enum_mysql_show_scope
Status variable scope.
Definition: status_var.h:68
@ SHOW_SCOPE_GLOBAL
Definition: status_var.h:70
@ SHOW_SCOPE_SESSION
Definition: status_var.h:72
@ SHOW_SCOPE_ALL
Definition: status_var.h:73
@ SHOW_SCOPE_UNDEF
Definition: status_var.h:69
SHOW STATUS Server status variable.
Definition: status_var.h:79
enum enum_mysql_show_scope scope
Definition: status_var.h:83
char * value
Definition: status_var.h:81
enum enum_mysql_show_type type
Definition: status_var.h:82
const char * name
Definition: status_var.h:80