mirror of
https://github.com/MariaDB/server.git
synced 2025-11-03 14:33:32 +03:00
4d57b851a0
Backport from 6.0 to 5.1.
Only those sync points are included, which are used in debug_sync.test.
The Debug Sync Facility allows to place synchronization points
in the code:
open_tables(...)
DEBUG_SYNC(thd, "after_open_tables");
lock_tables(...)
When activated, a sync point can
- Send a signal and/or
- Wait for a signal
Nomenclature:
- signal: A value of a global variable that persists
until overwritten by a new signal. The global
variable can also be seen as a "signal post"
or "flag mast". Then the signal is what is
attached to the "signal post" or "flag mast".
- send a signal: Assign the value (the signal) to the global
variable ("set a flag") and broadcast a
global condition to wake those waiting for
a signal.
- wait for a signal: Loop over waiting for the global condition until
the global value matches the wait-for signal.
Please find more information in the top comment in debug_sync.cc
or in the worklog entry.
.bzrignore:
WL#4259 - Debug Sync Facility
Added the symbolic link libmysqld/debug_sync.cc.
CMakeLists.txt:
WL#4259 - Debug Sync Facility
Added definition for ENABLED_DEBUG_SYNC.
configure.in:
WL#4259 - Debug Sync Facility
Added definition for ENABLED_DEBUG_SYNC.
include/my_sys.h:
WL#4259 - Debug Sync Facility
Added definition for the DEBUG_SYNC_C macro.
libmysqld/CMakeLists.txt:
WL#4259 - Debug Sync Facility
Added sql/debug_sync.cc.
libmysqld/Makefile.am:
WL#4259 - Debug Sync Facility
Added sql/debug_sync.cc.
mysql-test/include/have_debug_sync.inc:
WL#4259 - Debug Sync Facility
New include file.
mysql-test/mysql-test-run.pl:
WL#4259 - Debug Sync Facility
Added option --debug_sync_timeout.
mysql-test/r/debug_sync.result:
WL#4259 - Debug Sync Facility
New test result.
mysql-test/r/have_debug_sync.require:
WL#4259 - Debug Sync Facility
New require file.
mysql-test/t/debug_sync.test:
WL#4259 - Debug Sync Facility
New test file.
mysys/my_static.c:
WL#4259 - Debug Sync Facility
Added definition for debug_sync_C_callback_ptr.
mysys/thr_lock.c:
WL#4259 - Debug Sync Facility
Added sync point "wait_for_lock".
sql/CMakeLists.txt:
WL#4259 - Debug Sync Facility
Added debug_sync.cc and debug_sync.h.
sql/Makefile.am:
WL#4259 - Debug Sync Facility
Added debug_sync.cc and debug_sync.h.
sql/debug_sync.cc:
WL#4259 - Debug Sync Facility
New source file.
sql/debug_sync.h:
WL#4259 - Debug Sync Facility
New header file.
sql/mysqld.cc:
WL#4259 - Debug Sync Facility
Added opt_debug_sync_timeout.
Added calls to debug_sync_init() and debug_sync_end().
Fixed a purecov comment (unrelated).
sql/set_var.cc:
WL#4259 - Debug Sync Facility
Added server variable "debug_sync".
sql/set_var.h:
WL#4259 - Debug Sync Facility
Added declaration for server variable "debug_sync".
sql/share/errmsg.txt:
WL#4259 - Debug Sync Facility
Added error messages ER_DEBUG_SYNC_TIMEOUT and ER_DEBUG_SYNC_HIT_LIMIT.
sql/sql_base.cc:
WL#4259 - Debug Sync Facility
Added sync points "after_flush_unlock" and "before_lock_tables_takes_lock".
sql/sql_class.cc:
WL#4259 - Debug Sync Facility
Added initialization for debug_sync_control to THD::THD.
Added calls to debug_sync_init_thread() and debug_sync_end_thread().
sql/sql_class.h:
WL#4259 - Debug Sync Facility
Added element debug_sync_control to THD.
storage/myisam/myisamchk.c:
Fixed a typo in an error message string (unrelated).
1468 lines
45 KiB
C++
1468 lines
45 KiB
C++
/* Copyright (C) 2002-2006 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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/* Classes to support the SET command */
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#ifdef USE_PRAGMA_INTERFACE
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#pragma interface /* gcc class implementation */
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#endif
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/****************************************************************************
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Variables that are changable runtime are declared using the
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following classes
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****************************************************************************/
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class sys_var;
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class set_var;
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class sys_var_pluginvar; /* opaque */
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typedef struct system_variables SV;
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typedef struct my_locale_st MY_LOCALE;
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extern TYPELIB bool_typelib, delay_key_write_typelib, sql_mode_typelib,
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optimizer_switch_typelib, slave_exec_mode_typelib;
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typedef int (*sys_check_func)(THD *, set_var *);
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typedef bool (*sys_update_func)(THD *, set_var *);
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typedef void (*sys_after_update_func)(THD *,enum_var_type);
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typedef void (*sys_set_default_func)(THD *, enum_var_type);
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typedef uchar *(*sys_value_ptr_func)(THD *thd);
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struct sys_var_chain
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{
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sys_var *first;
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sys_var *last;
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};
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class sys_var
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{
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public:
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/**
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Enumeration type to indicate for a system variable whether it will be written to the binlog or not.
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*/
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enum Binlog_status_enum
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{
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/* The variable value is not in the binlog. */
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NOT_IN_BINLOG,
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/* The value of the @@session variable is in the binlog. */
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SESSION_VARIABLE_IN_BINLOG
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/*
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Currently, no @@global variable is ever in the binlog, so we
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don't need an enumeration value for that.
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*/
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};
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sys_var *next;
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struct my_option *option_limits; /* Updated by by set_var_init() */
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uint name_length; /* Updated by by set_var_init() */
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const char *name;
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sys_after_update_func after_update;
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bool no_support_one_shot;
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/*
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true if the value is in character_set_filesystem,
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false otherwise.
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Note that we can't use a pointer to the charset as the system var is
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instantiated in global scope and the charset pointers are initialized
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later.
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*/
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bool is_os_charset;
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sys_var(const char *name_arg, sys_after_update_func func= NULL,
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Binlog_status_enum binlog_status_arg= NOT_IN_BINLOG)
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:name(name_arg), after_update(func), no_support_one_shot(1),
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is_os_charset (FALSE),
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binlog_status(binlog_status_arg),
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m_allow_empty_value(TRUE)
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{}
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virtual ~sys_var() {}
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void chain_sys_var(sys_var_chain *chain_arg)
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{
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if (chain_arg->last)
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chain_arg->last->next= this;
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else
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chain_arg->first= this;
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chain_arg->last= this;
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}
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virtual bool check(THD *thd, set_var *var);
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bool check_enum(THD *thd, set_var *var, const TYPELIB *enum_names);
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bool check_set(THD *thd, set_var *var, TYPELIB *enum_names);
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bool is_written_to_binlog(enum_var_type type)
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{
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return (type == OPT_SESSION || type == OPT_DEFAULT) &&
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(binlog_status == SESSION_VARIABLE_IN_BINLOG);
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}
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virtual bool update(THD *thd, set_var *var)=0;
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virtual void set_default(THD *thd_arg, enum_var_type type) {}
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virtual SHOW_TYPE show_type() { return SHOW_UNDEF; }
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virtual uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base)
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{ return 0; }
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virtual bool check_type(enum_var_type type)
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{ return type != OPT_GLOBAL; } /* Error if not GLOBAL */
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virtual bool check_update_type(Item_result type)
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{ return type != INT_RESULT; } /* Assume INT */
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virtual bool check_default(enum_var_type type)
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{ return option_limits == 0; }
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virtual bool is_struct() { return 0; }
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virtual bool is_readonly() const { return 0; }
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CHARSET_INFO *charset(THD *thd);
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virtual sys_var_pluginvar *cast_pluginvar() { return 0; }
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protected:
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void set_allow_empty_value(bool allow_empty_value)
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{
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m_allow_empty_value= allow_empty_value;
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}
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private:
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const Binlog_status_enum binlog_status;
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bool m_allow_empty_value;
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};
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/*
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A base class for all variables that require its access to
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be guarded with a mutex.
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*/
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class sys_var_global: public sys_var
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{
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protected:
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pthread_mutex_t *guard;
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public:
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sys_var_global(const char *name_arg, sys_after_update_func after_update_arg,
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pthread_mutex_t *guard_arg)
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:sys_var(name_arg, after_update_arg), guard(guard_arg) {}
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};
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/*
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A global-only ulong variable that requires its access to be
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protected with a mutex.
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*/
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class sys_var_long_ptr_global: public sys_var_global
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{
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public:
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ulong *value;
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sys_var_long_ptr_global(sys_var_chain *chain, const char *name_arg,
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ulong *value_ptr_arg,
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pthread_mutex_t *guard_arg,
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sys_after_update_func after_update_arg= NULL)
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:sys_var_global(name_arg, after_update_arg, guard_arg),
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value(value_ptr_arg)
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{ chain_sys_var(chain); }
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bool check(THD *thd, set_var *var);
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bool update(THD *thd, set_var *var);
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void set_default(THD *thd, enum_var_type type);
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SHOW_TYPE show_type() { return SHOW_LONG; }
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uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base)
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{ return (uchar*) value; }
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};
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/*
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A global ulong variable that is protected by LOCK_global_system_variables
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*/
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class sys_var_long_ptr :public sys_var_long_ptr_global
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{
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public:
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sys_var_long_ptr(sys_var_chain *chain, const char *name_arg, ulong *value_ptr,
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sys_after_update_func after_update_arg= NULL);
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};
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class sys_var_ulonglong_ptr :public sys_var
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{
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public:
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ulonglong *value;
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sys_var_ulonglong_ptr(sys_var_chain *chain, const char *name_arg, ulonglong *value_ptr_arg)
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:sys_var(name_arg),value(value_ptr_arg)
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{ chain_sys_var(chain); }
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sys_var_ulonglong_ptr(sys_var_chain *chain, const char *name_arg, ulonglong *value_ptr_arg,
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sys_after_update_func func)
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:sys_var(name_arg,func), value(value_ptr_arg)
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{ chain_sys_var(chain); }
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bool update(THD *thd, set_var *var);
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void set_default(THD *thd, enum_var_type type);
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SHOW_TYPE show_type() { return SHOW_LONGLONG; }
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uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base)
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{ return (uchar*) value; }
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};
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class sys_var_bool_ptr :public sys_var
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{
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public:
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my_bool *value;
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sys_var_bool_ptr(sys_var_chain *chain, const char *name_arg, my_bool *value_arg)
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:sys_var(name_arg),value(value_arg)
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{ chain_sys_var(chain); }
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bool check(THD *thd, set_var *var)
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{
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return check_enum(thd, var, &bool_typelib);
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}
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bool update(THD *thd, set_var *var);
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void set_default(THD *thd, enum_var_type type);
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SHOW_TYPE show_type() { return SHOW_MY_BOOL; }
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uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base)
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{ return (uchar*) value; }
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bool check_update_type(Item_result type) { return 0; }
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};
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class sys_var_bool_ptr_readonly :public sys_var_bool_ptr
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{
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public:
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sys_var_bool_ptr_readonly(sys_var_chain *chain, const char *name_arg,
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my_bool *value_arg)
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:sys_var_bool_ptr(chain, name_arg, value_arg)
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{}
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bool is_readonly() const { return 1; }
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};
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class sys_var_str :public sys_var
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{
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public:
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char *value; // Pointer to allocated string
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uint value_length;
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sys_check_func check_func;
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sys_update_func update_func;
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sys_set_default_func set_default_func;
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sys_var_str(sys_var_chain *chain, const char *name_arg,
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sys_check_func check_func_arg,
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sys_update_func update_func_arg,
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sys_set_default_func set_default_func_arg,
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char *value_arg)
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:sys_var(name_arg), value(value_arg), check_func(check_func_arg),
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update_func(update_func_arg),set_default_func(set_default_func_arg)
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{ chain_sys_var(chain); }
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bool check(THD *thd, set_var *var);
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bool update(THD *thd, set_var *var)
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{
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return (*update_func)(thd, var);
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}
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void set_default(THD *thd, enum_var_type type)
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{
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(*set_default_func)(thd, type);
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}
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SHOW_TYPE show_type() { return SHOW_CHAR; }
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uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base)
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{ return (uchar*) value; }
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bool check_update_type(Item_result type)
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{
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return type != STRING_RESULT; /* Only accept strings */
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}
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bool check_default(enum_var_type type) { return 0; }
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};
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class sys_var_const_str :public sys_var
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{
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public:
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char *value; // Pointer to const value
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sys_var_const_str(sys_var_chain *chain, const char *name_arg,
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const char *value_arg)
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:sys_var(name_arg), value((char*) value_arg)
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{ chain_sys_var(chain); }
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bool check(THD *thd, set_var *var)
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{
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return 1;
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}
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bool update(THD *thd, set_var *var)
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{
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return 1;
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}
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SHOW_TYPE show_type() { return SHOW_CHAR; }
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uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base)
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{
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return (uchar*) value;
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}
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bool check_update_type(Item_result type)
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{
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return 1;
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}
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bool check_default(enum_var_type type) { return 1; }
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bool is_readonly() const { return 1; }
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};
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class sys_var_const_os_str: public sys_var_const_str
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{
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public:
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sys_var_const_os_str(sys_var_chain *chain, const char *name_arg,
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const char *value_arg)
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:sys_var_const_str(chain, name_arg, value_arg)
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{
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is_os_charset= TRUE;
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}
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};
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class sys_var_const_str_ptr :public sys_var
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{
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public:
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char **value; // Pointer to const value
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sys_var_const_str_ptr(sys_var_chain *chain, const char *name_arg, char **value_arg)
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:sys_var(name_arg),value(value_arg)
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{ chain_sys_var(chain); }
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bool check(THD *thd, set_var *var)
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{
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return 1;
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}
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bool update(THD *thd, set_var *var)
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{
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return 1;
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}
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SHOW_TYPE show_type() { return SHOW_CHAR; }
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uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base)
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{
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return (uchar*) *value;
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}
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bool check_update_type(Item_result type)
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{
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return 1;
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}
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bool check_default(enum_var_type type) { return 1; }
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bool is_readonly() const { return 1; }
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};
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class sys_var_const_os_str_ptr :public sys_var_const_str_ptr
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{
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public:
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sys_var_const_os_str_ptr(sys_var_chain *chain, const char *name_arg,
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char **value_arg)
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:sys_var_const_str_ptr(chain, name_arg, value_arg)
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{
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is_os_charset= TRUE;
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}
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};
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|
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|
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class sys_var_enum :public sys_var
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{
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uint *value;
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TYPELIB *enum_names;
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public:
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sys_var_enum(sys_var_chain *chain, const char *name_arg, uint *value_arg,
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TYPELIB *typelib, sys_after_update_func func)
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:sys_var(name_arg,func), value(value_arg), enum_names(typelib)
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{ chain_sys_var(chain); }
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bool check(THD *thd, set_var *var)
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{
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return check_enum(thd, var, enum_names);
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}
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bool update(THD *thd, set_var *var);
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SHOW_TYPE show_type() { return SHOW_CHAR; }
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uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
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bool check_update_type(Item_result type) { return 0; }
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};
|
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|
|
|
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class sys_var_enum_const :public sys_var
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|
{
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ulong SV::*offset;
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TYPELIB *enum_names;
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public:
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sys_var_enum_const(sys_var_chain *chain, const char *name_arg, ulong SV::*offset_arg,
|
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TYPELIB *typelib, sys_after_update_func func)
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:sys_var(name_arg,func), offset(offset_arg), enum_names(typelib)
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{ chain_sys_var(chain); }
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bool check(THD *thd, set_var *var) { return 1; }
|
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bool update(THD *thd, set_var *var) { return 1; }
|
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SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
bool check_update_type(Item_result type) { return 1; }
|
|
bool is_readonly() const { return 1; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
};
|
|
|
|
|
|
class sys_var_thd :public sys_var
|
|
{
|
|
public:
|
|
sys_var_thd(const char *name_arg,
|
|
sys_after_update_func func= NULL,
|
|
Binlog_status_enum binlog_status= NOT_IN_BINLOG)
|
|
:sys_var(name_arg, func, binlog_status)
|
|
{}
|
|
bool check_type(enum_var_type type) { return 0; }
|
|
bool check_default(enum_var_type type)
|
|
{
|
|
return type == OPT_GLOBAL && !option_limits;
|
|
}
|
|
};
|
|
|
|
|
|
class sys_var_thd_ulong :public sys_var_thd
|
|
{
|
|
sys_check_func check_func;
|
|
public:
|
|
ulong SV::*offset;
|
|
sys_var_thd_ulong(sys_var_chain *chain, const char *name_arg,
|
|
ulong SV::*offset_arg,
|
|
sys_check_func c_func= NULL,
|
|
sys_after_update_func au_func= NULL,
|
|
Binlog_status_enum binlog_status_arg= NOT_IN_BINLOG)
|
|
:sys_var_thd(name_arg, au_func, binlog_status_arg), check_func(c_func),
|
|
offset(offset_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool check(THD *thd, set_var *var);
|
|
bool update(THD *thd, set_var *var);
|
|
void set_default(THD *thd, enum_var_type type);
|
|
SHOW_TYPE show_type() { return SHOW_LONG; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
};
|
|
|
|
|
|
class sys_var_thd_ha_rows :public sys_var_thd
|
|
{
|
|
public:
|
|
ha_rows SV::*offset;
|
|
sys_var_thd_ha_rows(sys_var_chain *chain, const char *name_arg,
|
|
ha_rows SV::*offset_arg)
|
|
:sys_var_thd(name_arg), offset(offset_arg)
|
|
{ chain_sys_var(chain); }
|
|
sys_var_thd_ha_rows(sys_var_chain *chain, const char *name_arg,
|
|
ha_rows SV::*offset_arg,
|
|
sys_after_update_func func)
|
|
:sys_var_thd(name_arg,func), offset(offset_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool update(THD *thd, set_var *var);
|
|
void set_default(THD *thd, enum_var_type type);
|
|
SHOW_TYPE show_type() { return SHOW_HA_ROWS; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
};
|
|
|
|
|
|
class sys_var_thd_ulonglong :public sys_var_thd
|
|
{
|
|
public:
|
|
ulonglong SV::*offset;
|
|
bool only_global;
|
|
sys_var_thd_ulonglong(sys_var_chain *chain, const char *name_arg,
|
|
ulonglong SV::*offset_arg)
|
|
:sys_var_thd(name_arg), offset(offset_arg)
|
|
{ chain_sys_var(chain); }
|
|
sys_var_thd_ulonglong(sys_var_chain *chain, const char *name_arg,
|
|
ulonglong SV::*offset_arg,
|
|
sys_after_update_func func, bool only_global_arg)
|
|
:sys_var_thd(name_arg, func), offset(offset_arg),
|
|
only_global(only_global_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool update(THD *thd, set_var *var);
|
|
void set_default(THD *thd, enum_var_type type);
|
|
SHOW_TYPE show_type() { return SHOW_LONGLONG; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
bool check(THD *thd, set_var *var);
|
|
bool check_default(enum_var_type type)
|
|
{
|
|
return type == OPT_GLOBAL && !option_limits;
|
|
}
|
|
bool check_type(enum_var_type type)
|
|
{
|
|
return (only_global && type != OPT_GLOBAL);
|
|
}
|
|
};
|
|
|
|
|
|
class sys_var_thd_bool :public sys_var_thd
|
|
{
|
|
public:
|
|
my_bool SV::*offset;
|
|
sys_var_thd_bool(sys_var_chain *chain, const char *name_arg, my_bool SV::*offset_arg)
|
|
:sys_var_thd(name_arg), offset(offset_arg)
|
|
{ chain_sys_var(chain); }
|
|
sys_var_thd_bool(sys_var_chain *chain, const char *name_arg, my_bool SV::*offset_arg,
|
|
sys_after_update_func func)
|
|
:sys_var_thd(name_arg,func), offset(offset_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool update(THD *thd, set_var *var);
|
|
void set_default(THD *thd, enum_var_type type);
|
|
SHOW_TYPE show_type() { return SHOW_MY_BOOL; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
bool check(THD *thd, set_var *var)
|
|
{
|
|
return check_enum(thd, var, &bool_typelib);
|
|
}
|
|
bool check_update_type(Item_result type) { return 0; }
|
|
};
|
|
|
|
|
|
class sys_var_thd_enum :public sys_var_thd
|
|
{
|
|
protected:
|
|
ulong SV::*offset;
|
|
TYPELIB *enum_names;
|
|
sys_check_func check_func;
|
|
public:
|
|
sys_var_thd_enum(sys_var_chain *chain, const char *name_arg,
|
|
ulong SV::*offset_arg, TYPELIB *typelib,
|
|
sys_after_update_func func= NULL,
|
|
sys_check_func check= NULL)
|
|
:sys_var_thd(name_arg, func), offset(offset_arg),
|
|
enum_names(typelib), check_func(check)
|
|
{ chain_sys_var(chain); }
|
|
bool check(THD *thd, set_var *var)
|
|
{
|
|
int ret= 0;
|
|
if (check_func)
|
|
ret= (*check_func)(thd, var);
|
|
return ret ? ret : check_enum(thd, var, enum_names);
|
|
}
|
|
bool update(THD *thd, set_var *var);
|
|
void set_default(THD *thd, enum_var_type type);
|
|
SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
bool check_update_type(Item_result type) { return 0; }
|
|
};
|
|
|
|
|
|
class sys_var_thd_optimizer_switch :public sys_var_thd_enum
|
|
{
|
|
public:
|
|
sys_var_thd_optimizer_switch(sys_var_chain *chain, const char *name_arg,
|
|
ulong SV::*offset_arg)
|
|
:sys_var_thd_enum(chain, name_arg, offset_arg, &optimizer_switch_typelib)
|
|
{}
|
|
bool check(THD *thd, set_var *var);
|
|
void set_default(THD *thd, enum_var_type type);
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
static bool symbolic_mode_representation(THD *thd, ulonglong sql_mode,
|
|
LEX_STRING *rep);
|
|
};
|
|
|
|
extern void fix_sql_mode_var(THD *thd, enum_var_type type);
|
|
|
|
class sys_var_thd_sql_mode :public sys_var_thd_enum
|
|
{
|
|
public:
|
|
sys_var_thd_sql_mode(sys_var_chain *chain, const char *name_arg,
|
|
ulong SV::*offset_arg)
|
|
:sys_var_thd_enum(chain, name_arg, offset_arg, &sql_mode_typelib,
|
|
fix_sql_mode_var)
|
|
{}
|
|
bool check(THD *thd, set_var *var)
|
|
{
|
|
return check_set(thd, var, enum_names);
|
|
}
|
|
void set_default(THD *thd, enum_var_type type);
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
static bool symbolic_mode_representation(THD *thd, ulonglong sql_mode,
|
|
LEX_STRING *rep);
|
|
};
|
|
|
|
|
|
class sys_var_thd_storage_engine :public sys_var_thd
|
|
{
|
|
protected:
|
|
plugin_ref SV::*offset;
|
|
public:
|
|
sys_var_thd_storage_engine(sys_var_chain *chain, const char *name_arg,
|
|
plugin_ref SV::*offset_arg)
|
|
:sys_var_thd(name_arg), offset(offset_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool check(THD *thd, set_var *var);
|
|
SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
bool check_update_type(Item_result type)
|
|
{
|
|
return type != STRING_RESULT; /* Only accept strings */
|
|
}
|
|
void set_default(THD *thd, enum_var_type type);
|
|
bool update(THD *thd, set_var *var);
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
};
|
|
|
|
class sys_var_thd_table_type :public sys_var_thd_storage_engine
|
|
{
|
|
public:
|
|
sys_var_thd_table_type(sys_var_chain *chain, const char *name_arg,
|
|
plugin_ref SV::*offset_arg)
|
|
:sys_var_thd_storage_engine(chain, name_arg, offset_arg)
|
|
{}
|
|
void warn_deprecated(THD *thd);
|
|
void set_default(THD *thd, enum_var_type type);
|
|
bool update(THD *thd, set_var *var);
|
|
};
|
|
|
|
class sys_var_thd_bit :public sys_var_thd
|
|
{
|
|
sys_check_func check_func;
|
|
sys_update_func update_func;
|
|
public:
|
|
ulonglong bit_flag;
|
|
bool reverse;
|
|
sys_var_thd_bit(sys_var_chain *chain, const char *name_arg,
|
|
sys_check_func c_func, sys_update_func u_func,
|
|
ulonglong bit, bool reverse_arg=0,
|
|
Binlog_status_enum binlog_status_arg= NOT_IN_BINLOG)
|
|
:sys_var_thd(name_arg, NULL, binlog_status_arg), check_func(c_func),
|
|
update_func(u_func), bit_flag(bit), reverse(reverse_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool check(THD *thd, set_var *var);
|
|
bool update(THD *thd, set_var *var);
|
|
bool check_update_type(Item_result type) { return 0; }
|
|
bool check_type(enum_var_type type) { return type == OPT_GLOBAL; }
|
|
SHOW_TYPE show_type() { return SHOW_MY_BOOL; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
};
|
|
|
|
#ifndef DBUG_OFF
|
|
class sys_var_thd_dbug :public sys_var_thd
|
|
{
|
|
public:
|
|
sys_var_thd_dbug(sys_var_chain *chain, const char *name_arg)
|
|
:sys_var_thd(name_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool check_update_type(Item_result type) { return type != STRING_RESULT; }
|
|
bool check(THD *thd, set_var *var);
|
|
SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
bool update(THD *thd, set_var *var);
|
|
void set_default(THD *thd, enum_var_type type) { DBUG_POP(); }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *b);
|
|
};
|
|
#endif /* DBUG_OFF */
|
|
|
|
#if defined(ENABLED_DEBUG_SYNC)
|
|
/* Debug Sync Facility. Implemented in debug_sync.cc. */
|
|
class sys_var_debug_sync :public sys_var_thd
|
|
{
|
|
public:
|
|
sys_var_debug_sync(sys_var_chain *chain, const char *name_arg)
|
|
:sys_var_thd(name_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool check(THD *thd, set_var *var);
|
|
bool update(THD *thd, set_var *var);
|
|
SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
bool check_update_type(Item_result type) { return type != STRING_RESULT; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
};
|
|
#endif /* defined(ENABLED_DEBUG_SYNC) */
|
|
|
|
/* some variables that require special handling */
|
|
|
|
class sys_var_timestamp :public sys_var
|
|
{
|
|
public:
|
|
sys_var_timestamp(sys_var_chain *chain, const char *name_arg,
|
|
Binlog_status_enum binlog_status_arg= NOT_IN_BINLOG)
|
|
:sys_var(name_arg, NULL, binlog_status_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool update(THD *thd, set_var *var);
|
|
void set_default(THD *thd, enum_var_type type);
|
|
bool check_type(enum_var_type type) { return type == OPT_GLOBAL; }
|
|
bool check_default(enum_var_type type) { return 0; }
|
|
SHOW_TYPE show_type() { return SHOW_LONG; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
};
|
|
|
|
|
|
class sys_var_last_insert_id :public sys_var
|
|
{
|
|
public:
|
|
sys_var_last_insert_id(sys_var_chain *chain, const char *name_arg,
|
|
Binlog_status_enum binlog_status_arg= NOT_IN_BINLOG)
|
|
:sys_var(name_arg, NULL, binlog_status_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool update(THD *thd, set_var *var);
|
|
bool check_type(enum_var_type type) { return type == OPT_GLOBAL; }
|
|
SHOW_TYPE show_type() { return SHOW_LONGLONG; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
};
|
|
|
|
|
|
class sys_var_insert_id :public sys_var
|
|
{
|
|
public:
|
|
sys_var_insert_id(sys_var_chain *chain, const char *name_arg)
|
|
:sys_var(name_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool update(THD *thd, set_var *var);
|
|
bool check_type(enum_var_type type) { return type == OPT_GLOBAL; }
|
|
SHOW_TYPE show_type() { return SHOW_LONGLONG; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
};
|
|
|
|
|
|
class sys_var_rand_seed1 :public sys_var
|
|
{
|
|
public:
|
|
sys_var_rand_seed1(sys_var_chain *chain, const char *name_arg,
|
|
Binlog_status_enum binlog_status_arg= NOT_IN_BINLOG)
|
|
:sys_var(name_arg, NULL, binlog_status_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool update(THD *thd, set_var *var);
|
|
bool check_type(enum_var_type type) { return type == OPT_GLOBAL; }
|
|
};
|
|
|
|
class sys_var_rand_seed2 :public sys_var
|
|
{
|
|
public:
|
|
sys_var_rand_seed2(sys_var_chain *chain, const char *name_arg,
|
|
Binlog_status_enum binlog_status_arg= NOT_IN_BINLOG)
|
|
:sys_var(name_arg, NULL, binlog_status_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool update(THD *thd, set_var *var);
|
|
bool check_type(enum_var_type type) { return type == OPT_GLOBAL; }
|
|
};
|
|
|
|
|
|
class sys_var_collation :public sys_var_thd
|
|
{
|
|
public:
|
|
sys_var_collation(const char *name_arg,
|
|
Binlog_status_enum binlog_status_arg= NOT_IN_BINLOG)
|
|
:sys_var_thd(name_arg, NULL, binlog_status_arg)
|
|
{
|
|
no_support_one_shot= 0;
|
|
}
|
|
bool check(THD *thd, set_var *var);
|
|
SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
bool check_update_type(Item_result type)
|
|
{
|
|
return ((type != STRING_RESULT) && (type != INT_RESULT));
|
|
}
|
|
bool check_default(enum_var_type type) { return 0; }
|
|
virtual void set_default(THD *thd, enum_var_type type)= 0;
|
|
};
|
|
|
|
class sys_var_character_set :public sys_var_thd
|
|
{
|
|
public:
|
|
bool nullable;
|
|
sys_var_character_set(const char *name_arg, bool is_nullable= 0,
|
|
Binlog_status_enum binlog_status_arg= NOT_IN_BINLOG)
|
|
:sys_var_thd(name_arg, NULL, binlog_status_arg), nullable(is_nullable)
|
|
{
|
|
/*
|
|
In fact only almost all variables derived from sys_var_character_set
|
|
support ONE_SHOT; character_set_results doesn't. But that's good enough.
|
|
*/
|
|
no_support_one_shot= 0;
|
|
}
|
|
bool check(THD *thd, set_var *var);
|
|
SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
bool check_update_type(Item_result type)
|
|
{
|
|
return ((type != STRING_RESULT) && (type != INT_RESULT));
|
|
}
|
|
bool check_default(enum_var_type type) { return 0; }
|
|
bool update(THD *thd, set_var *var);
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
virtual void set_default(THD *thd, enum_var_type type)= 0;
|
|
virtual CHARSET_INFO **ci_ptr(THD *thd, enum_var_type type)= 0;
|
|
};
|
|
|
|
class sys_var_character_set_sv :public sys_var_character_set
|
|
{
|
|
CHARSET_INFO *SV::*offset;
|
|
CHARSET_INFO **global_default;
|
|
public:
|
|
sys_var_character_set_sv(sys_var_chain *chain, const char *name_arg,
|
|
CHARSET_INFO *SV::*offset_arg,
|
|
CHARSET_INFO **global_default_arg,
|
|
bool is_nullable= 0,
|
|
Binlog_status_enum binlog_status_arg= NOT_IN_BINLOG)
|
|
: sys_var_character_set(name_arg, is_nullable, binlog_status_arg),
|
|
offset(offset_arg), global_default(global_default_arg)
|
|
{ chain_sys_var(chain); }
|
|
void set_default(THD *thd, enum_var_type type);
|
|
CHARSET_INFO **ci_ptr(THD *thd, enum_var_type type);
|
|
};
|
|
|
|
|
|
class sys_var_character_set_client: public sys_var_character_set_sv
|
|
{
|
|
public:
|
|
sys_var_character_set_client(sys_var_chain *chain, const char *name_arg,
|
|
CHARSET_INFO *SV::*offset_arg,
|
|
CHARSET_INFO **global_default_arg,
|
|
Binlog_status_enum binlog_status_arg)
|
|
: sys_var_character_set_sv(chain, name_arg, offset_arg, global_default_arg,
|
|
0, binlog_status_arg)
|
|
{ }
|
|
bool check(THD *thd, set_var *var);
|
|
};
|
|
|
|
|
|
class sys_var_character_set_database :public sys_var_character_set
|
|
{
|
|
public:
|
|
sys_var_character_set_database(sys_var_chain *chain, const char *name_arg,
|
|
Binlog_status_enum binlog_status_arg=
|
|
NOT_IN_BINLOG)
|
|
: sys_var_character_set(name_arg, 0, binlog_status_arg)
|
|
{ chain_sys_var(chain); }
|
|
void set_default(THD *thd, enum_var_type type);
|
|
CHARSET_INFO **ci_ptr(THD *thd, enum_var_type type);
|
|
};
|
|
|
|
class sys_var_collation_sv :public sys_var_collation
|
|
{
|
|
CHARSET_INFO *SV::*offset;
|
|
CHARSET_INFO **global_default;
|
|
public:
|
|
sys_var_collation_sv(sys_var_chain *chain, const char *name_arg,
|
|
CHARSET_INFO *SV::*offset_arg,
|
|
CHARSET_INFO **global_default_arg,
|
|
Binlog_status_enum binlog_status_arg= NOT_IN_BINLOG)
|
|
:sys_var_collation(name_arg, binlog_status_arg),
|
|
offset(offset_arg), global_default(global_default_arg)
|
|
{
|
|
chain_sys_var(chain);
|
|
}
|
|
bool update(THD *thd, set_var *var);
|
|
void set_default(THD *thd, enum_var_type type);
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
};
|
|
|
|
|
|
class sys_var_key_cache_param :public sys_var
|
|
{
|
|
protected:
|
|
size_t offset;
|
|
public:
|
|
sys_var_key_cache_param(sys_var_chain *chain, const char *name_arg,
|
|
size_t offset_arg)
|
|
:sys_var(name_arg), offset(offset_arg)
|
|
{ chain_sys_var(chain); }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
bool check_default(enum_var_type type) { return 1; }
|
|
bool is_struct() { return 1; }
|
|
};
|
|
|
|
|
|
class sys_var_key_buffer_size :public sys_var_key_cache_param
|
|
{
|
|
public:
|
|
sys_var_key_buffer_size(sys_var_chain *chain, const char *name_arg)
|
|
:sys_var_key_cache_param(chain, name_arg,
|
|
offsetof(KEY_CACHE, param_buff_size))
|
|
{}
|
|
bool update(THD *thd, set_var *var);
|
|
SHOW_TYPE show_type() { return SHOW_LONGLONG; }
|
|
};
|
|
|
|
|
|
class sys_var_key_cache_long :public sys_var_key_cache_param
|
|
{
|
|
public:
|
|
sys_var_key_cache_long(sys_var_chain *chain, const char *name_arg, size_t offset_arg)
|
|
:sys_var_key_cache_param(chain, name_arg, offset_arg)
|
|
{}
|
|
bool update(THD *thd, set_var *var);
|
|
SHOW_TYPE show_type() { return SHOW_LONG; }
|
|
};
|
|
|
|
|
|
class sys_var_thd_date_time_format :public sys_var_thd
|
|
{
|
|
DATE_TIME_FORMAT *SV::*offset;
|
|
timestamp_type date_time_type;
|
|
public:
|
|
sys_var_thd_date_time_format(sys_var_chain *chain, const char *name_arg,
|
|
DATE_TIME_FORMAT *SV::*offset_arg,
|
|
timestamp_type date_time_type_arg)
|
|
:sys_var_thd(name_arg), offset(offset_arg),
|
|
date_time_type(date_time_type_arg)
|
|
{ chain_sys_var(chain); }
|
|
SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
bool check_update_type(Item_result type)
|
|
{
|
|
return type != STRING_RESULT; /* Only accept strings */
|
|
}
|
|
bool check_default(enum_var_type type) { return 0; }
|
|
bool check(THD *thd, set_var *var);
|
|
bool update(THD *thd, set_var *var);
|
|
void update2(THD *thd, enum_var_type type, DATE_TIME_FORMAT *new_value);
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
void set_default(THD *thd, enum_var_type type);
|
|
};
|
|
|
|
|
|
class sys_var_log_state :public sys_var_bool_ptr
|
|
{
|
|
uint log_type;
|
|
public:
|
|
sys_var_log_state(sys_var_chain *chain, const char *name_arg, my_bool *value_arg,
|
|
uint log_type_arg)
|
|
:sys_var_bool_ptr(chain, name_arg, value_arg), log_type(log_type_arg) {}
|
|
bool update(THD *thd, set_var *var);
|
|
void set_default(THD *thd, enum_var_type type);
|
|
};
|
|
|
|
|
|
class sys_var_set :public sys_var
|
|
{
|
|
protected:
|
|
ulong *value;
|
|
TYPELIB *enum_names;
|
|
public:
|
|
sys_var_set(sys_var_chain *chain, const char *name_arg, ulong *value_arg,
|
|
TYPELIB *typelib, sys_after_update_func func)
|
|
:sys_var(name_arg, func), value(value_arg), enum_names(typelib)
|
|
{ chain_sys_var(chain); }
|
|
virtual bool check(THD *thd, set_var *var)
|
|
{
|
|
return check_set(thd, var, enum_names);
|
|
}
|
|
virtual void set_default(THD *thd, enum_var_type type)
|
|
{
|
|
*value= 0;
|
|
}
|
|
bool update(THD *thd, set_var *var);
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
bool check_update_type(Item_result type) { return 0; }
|
|
SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
};
|
|
|
|
class sys_var_set_slave_mode :public sys_var_set
|
|
{
|
|
public:
|
|
sys_var_set_slave_mode(sys_var_chain *chain, const char *name_arg,
|
|
ulong *value_arg,
|
|
TYPELIB *typelib, sys_after_update_func func) :
|
|
sys_var_set(chain, name_arg, value_arg, typelib, func) {}
|
|
void set_default(THD *thd, enum_var_type type);
|
|
bool check(THD *thd, set_var *var);
|
|
bool update(THD *thd, set_var *var);
|
|
};
|
|
|
|
class sys_var_log_output :public sys_var
|
|
{
|
|
ulong *value;
|
|
TYPELIB *enum_names;
|
|
public:
|
|
sys_var_log_output(sys_var_chain *chain, const char *name_arg, ulong *value_arg,
|
|
TYPELIB *typelib, sys_after_update_func func)
|
|
:sys_var(name_arg,func), value(value_arg), enum_names(typelib)
|
|
{
|
|
chain_sys_var(chain);
|
|
set_allow_empty_value(FALSE);
|
|
}
|
|
virtual bool check(THD *thd, set_var *var)
|
|
{
|
|
return check_set(thd, var, enum_names);
|
|
}
|
|
bool update(THD *thd, set_var *var);
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
bool check_update_type(Item_result type) { return 0; }
|
|
void set_default(THD *thd, enum_var_type type);
|
|
SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
};
|
|
|
|
|
|
/* Variable that you can only read from */
|
|
|
|
class sys_var_readonly: public sys_var
|
|
{
|
|
public:
|
|
enum_var_type var_type;
|
|
SHOW_TYPE show_type_value;
|
|
sys_value_ptr_func value_ptr_func;
|
|
sys_var_readonly(sys_var_chain *chain, const char *name_arg, enum_var_type type,
|
|
SHOW_TYPE show_type_arg,
|
|
sys_value_ptr_func value_ptr_func_arg)
|
|
:sys_var(name_arg), var_type(type),
|
|
show_type_value(show_type_arg), value_ptr_func(value_ptr_func_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool update(THD *thd, set_var *var) { return 1; }
|
|
bool check_default(enum_var_type type) { return 1; }
|
|
bool check_type(enum_var_type type) { return type != var_type; }
|
|
bool check_update_type(Item_result type) { return 1; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base)
|
|
{
|
|
return (*value_ptr_func)(thd);
|
|
}
|
|
SHOW_TYPE show_type() { return show_type_value; }
|
|
bool is_readonly() const { return 1; }
|
|
};
|
|
|
|
|
|
class sys_var_readonly_os: public sys_var_readonly
|
|
{
|
|
public:
|
|
sys_var_readonly_os(sys_var_chain *chain, const char *name_arg, enum_var_type type,
|
|
SHOW_TYPE show_type_arg,
|
|
sys_value_ptr_func value_ptr_func_arg)
|
|
:sys_var_readonly(chain, name_arg, type, show_type_arg, value_ptr_func_arg)
|
|
{
|
|
is_os_charset= TRUE;
|
|
}
|
|
};
|
|
|
|
|
|
/**
|
|
Global-only, read-only variable. E.g. command line option.
|
|
*/
|
|
|
|
class sys_var_const: public sys_var
|
|
{
|
|
public:
|
|
enum_var_type var_type;
|
|
SHOW_TYPE show_type_value;
|
|
uchar *ptr;
|
|
sys_var_const(sys_var_chain *chain, const char *name_arg, enum_var_type type,
|
|
SHOW_TYPE show_type_arg, uchar *ptr_arg)
|
|
:sys_var(name_arg), var_type(type),
|
|
show_type_value(show_type_arg), ptr(ptr_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool update(THD *thd, set_var *var) { return 1; }
|
|
bool check_default(enum_var_type type) { return 1; }
|
|
bool check_type(enum_var_type type) { return type != var_type; }
|
|
bool check_update_type(Item_result type) { return 1; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base)
|
|
{
|
|
return ptr;
|
|
}
|
|
SHOW_TYPE show_type() { return show_type_value; }
|
|
bool is_readonly() const { return 1; }
|
|
};
|
|
|
|
|
|
class sys_var_const_os: public sys_var_const
|
|
{
|
|
public:
|
|
enum_var_type var_type;
|
|
SHOW_TYPE show_type_value;
|
|
uchar *ptr;
|
|
sys_var_const_os(sys_var_chain *chain, const char *name_arg,
|
|
enum_var_type type,
|
|
SHOW_TYPE show_type_arg, uchar *ptr_arg)
|
|
:sys_var_const(chain, name_arg, type, show_type_arg, ptr_arg)
|
|
{
|
|
is_os_charset= TRUE;
|
|
}
|
|
};
|
|
|
|
|
|
class sys_var_have_option: public sys_var
|
|
{
|
|
protected:
|
|
virtual SHOW_COMP_OPTION get_option() = 0;
|
|
public:
|
|
sys_var_have_option(sys_var_chain *chain, const char *variable_name):
|
|
sys_var(variable_name)
|
|
{ chain_sys_var(chain); }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base)
|
|
{
|
|
return (uchar*) show_comp_option_name[get_option()];
|
|
}
|
|
bool update(THD *thd, set_var *var) { return 1; }
|
|
bool check_default(enum_var_type type) { return 1; }
|
|
bool check_type(enum_var_type type) { return type != OPT_GLOBAL; }
|
|
bool check_update_type(Item_result type) { return 1; }
|
|
SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
bool is_readonly() const { return 1; }
|
|
};
|
|
|
|
|
|
class sys_var_have_variable: public sys_var_have_option
|
|
{
|
|
SHOW_COMP_OPTION *have_variable;
|
|
|
|
public:
|
|
sys_var_have_variable(sys_var_chain *chain, const char *variable_name,
|
|
SHOW_COMP_OPTION *have_variable_arg):
|
|
sys_var_have_option(chain, variable_name),
|
|
have_variable(have_variable_arg)
|
|
{ }
|
|
SHOW_COMP_OPTION get_option() { return *have_variable; }
|
|
};
|
|
|
|
|
|
class sys_var_have_plugin: public sys_var_have_option
|
|
{
|
|
const char *plugin_name_str;
|
|
const uint plugin_name_len;
|
|
const int plugin_type;
|
|
|
|
public:
|
|
sys_var_have_plugin(sys_var_chain *chain, const char *variable_name,
|
|
const char *plugin_name_str_arg, uint plugin_name_len_arg,
|
|
int plugin_type_arg):
|
|
sys_var_have_option(chain, variable_name),
|
|
plugin_name_str(plugin_name_str_arg), plugin_name_len(plugin_name_len_arg),
|
|
plugin_type(plugin_type_arg)
|
|
{ }
|
|
/* the following method is declared in sql_plugin.cc */
|
|
SHOW_COMP_OPTION get_option();
|
|
};
|
|
|
|
|
|
class sys_var_thd_time_zone :public sys_var_thd
|
|
{
|
|
public:
|
|
sys_var_thd_time_zone(sys_var_chain *chain, const char *name_arg,
|
|
Binlog_status_enum binlog_status_arg= NOT_IN_BINLOG)
|
|
:sys_var_thd(name_arg, NULL, binlog_status_arg)
|
|
{
|
|
no_support_one_shot= 0;
|
|
chain_sys_var(chain);
|
|
}
|
|
bool check(THD *thd, set_var *var);
|
|
SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
bool check_update_type(Item_result type)
|
|
{
|
|
return type != STRING_RESULT; /* Only accept strings */
|
|
}
|
|
bool check_default(enum_var_type type) { return 0; }
|
|
bool update(THD *thd, set_var *var);
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
virtual void set_default(THD *thd, enum_var_type type);
|
|
};
|
|
|
|
|
|
class sys_var_max_user_conn : public sys_var_thd
|
|
{
|
|
public:
|
|
sys_var_max_user_conn(sys_var_chain *chain, const char *name_arg):
|
|
sys_var_thd(name_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool check(THD *thd, set_var *var);
|
|
bool update(THD *thd, set_var *var);
|
|
bool check_default(enum_var_type type)
|
|
{
|
|
return type != OPT_GLOBAL || !option_limits;
|
|
}
|
|
void set_default(THD *thd, enum_var_type type);
|
|
SHOW_TYPE show_type() { return SHOW_INT; }
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
};
|
|
|
|
|
|
/**
|
|
* @brief This is a specialization of sys_var_thd_ulong that implements a
|
|
read-only session variable. The class overrides check() and check_default()
|
|
to achieve the read-only property for the session part of the variable.
|
|
*/
|
|
class sys_var_thd_ulong_session_readonly : public sys_var_thd_ulong
|
|
{
|
|
public:
|
|
sys_var_thd_ulong_session_readonly(sys_var_chain *chain_arg,
|
|
const char *name_arg, ulong SV::*offset_arg,
|
|
sys_check_func c_func= NULL,
|
|
sys_after_update_func au_func= NULL,
|
|
Binlog_status_enum bl_status_arg= NOT_IN_BINLOG):
|
|
sys_var_thd_ulong(chain_arg, name_arg, offset_arg, c_func, au_func, bl_status_arg)
|
|
{ }
|
|
bool check(THD *thd, set_var *var);
|
|
bool check_default(enum_var_type type)
|
|
{
|
|
return type != OPT_GLOBAL || !option_limits;
|
|
}
|
|
};
|
|
|
|
|
|
class sys_var_microseconds :public sys_var_thd
|
|
{
|
|
ulonglong SV::*offset;
|
|
public:
|
|
sys_var_microseconds(sys_var_chain *chain, const char *name_arg,
|
|
ulonglong SV::*offset_arg):
|
|
sys_var_thd(name_arg), offset(offset_arg)
|
|
{ chain_sys_var(chain); }
|
|
bool check(THD *thd, set_var *var) {return 0;}
|
|
bool update(THD *thd, set_var *var);
|
|
void set_default(THD *thd, enum_var_type type);
|
|
SHOW_TYPE show_type() { return SHOW_DOUBLE; }
|
|
bool check_update_type(Item_result type)
|
|
{
|
|
return (type != INT_RESULT && type != REAL_RESULT && type != DECIMAL_RESULT);
|
|
}
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
};
|
|
|
|
|
|
class sys_var_trust_routine_creators :public sys_var_bool_ptr
|
|
{
|
|
/* We need a derived class only to have a warn_deprecated() */
|
|
public:
|
|
sys_var_trust_routine_creators(sys_var_chain *chain,
|
|
const char *name_arg, my_bool *value_arg) :
|
|
sys_var_bool_ptr(chain, name_arg, value_arg) {};
|
|
void warn_deprecated(THD *thd);
|
|
void set_default(THD *thd, enum_var_type type);
|
|
bool update(THD *thd, set_var *var);
|
|
};
|
|
|
|
|
|
/**
|
|
Handler for setting the system variable --read-only.
|
|
*/
|
|
|
|
class sys_var_opt_readonly :public sys_var_bool_ptr
|
|
{
|
|
public:
|
|
sys_var_opt_readonly(sys_var_chain *chain, const char *name_arg,
|
|
my_bool *value_arg) :
|
|
sys_var_bool_ptr(chain, name_arg, value_arg) {};
|
|
~sys_var_opt_readonly() {};
|
|
bool update(THD *thd, set_var *var);
|
|
};
|
|
|
|
|
|
class sys_var_thd_lc_time_names :public sys_var_thd
|
|
{
|
|
public:
|
|
sys_var_thd_lc_time_names(sys_var_chain *chain, const char *name_arg,
|
|
Binlog_status_enum binlog_status_arg= NOT_IN_BINLOG)
|
|
: sys_var_thd(name_arg, NULL, binlog_status_arg)
|
|
{
|
|
#if MYSQL_VERSION_ID < 50000
|
|
no_support_one_shot= 0;
|
|
#endif
|
|
chain_sys_var(chain);
|
|
}
|
|
bool check(THD *thd, set_var *var);
|
|
SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
bool check_update_type(Item_result type)
|
|
{
|
|
return ((type != STRING_RESULT) && (type != INT_RESULT));
|
|
}
|
|
bool check_default(enum_var_type type) { return 0; }
|
|
bool update(THD *thd, set_var *var);
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
virtual void set_default(THD *thd, enum_var_type type);
|
|
};
|
|
|
|
#ifdef HAVE_EVENT_SCHEDULER
|
|
class sys_var_event_scheduler :public sys_var_long_ptr
|
|
{
|
|
/* We need a derived class only to have a warn_deprecated() */
|
|
public:
|
|
sys_var_event_scheduler(sys_var_chain *chain, const char *name_arg) :
|
|
sys_var_long_ptr(chain, name_arg, NULL, NULL) {};
|
|
bool update(THD *thd, set_var *var);
|
|
uchar *value_ptr(THD *thd, enum_var_type type, LEX_STRING *base);
|
|
SHOW_TYPE show_type() { return SHOW_CHAR; }
|
|
bool check(THD *thd, set_var *var);
|
|
bool check_update_type(Item_result type)
|
|
{
|
|
return type != STRING_RESULT && type != INT_RESULT;
|
|
}
|
|
};
|
|
#endif
|
|
|
|
extern void fix_binlog_format_after_update(THD *thd, enum_var_type type);
|
|
|
|
class sys_var_thd_binlog_format :public sys_var_thd_enum
|
|
{
|
|
public:
|
|
sys_var_thd_binlog_format(sys_var_chain *chain, const char *name_arg,
|
|
ulong SV::*offset_arg)
|
|
:sys_var_thd_enum(chain, name_arg, offset_arg,
|
|
&binlog_format_typelib,
|
|
fix_binlog_format_after_update)
|
|
{};
|
|
bool check(THD *thd, set_var *var);
|
|
bool is_readonly() const;
|
|
};
|
|
|
|
/****************************************************************************
|
|
Classes for parsing of the SET command
|
|
****************************************************************************/
|
|
|
|
class set_var_base :public Sql_alloc
|
|
{
|
|
public:
|
|
set_var_base() {}
|
|
virtual ~set_var_base() {}
|
|
virtual int check(THD *thd)=0; /* To check privileges etc. */
|
|
virtual int update(THD *thd)=0; /* To set the value */
|
|
/* light check for PS */
|
|
virtual int light_check(THD *thd) { return check(thd); }
|
|
virtual bool no_support_one_shot() { return 1; }
|
|
};
|
|
|
|
|
|
/* MySQL internal variables, like query_cache_size */
|
|
|
|
class set_var :public set_var_base
|
|
{
|
|
public:
|
|
sys_var *var;
|
|
Item *value;
|
|
enum_var_type type;
|
|
union
|
|
{
|
|
CHARSET_INFO *charset;
|
|
ulong ulong_value;
|
|
ulonglong ulonglong_value;
|
|
plugin_ref plugin;
|
|
DATE_TIME_FORMAT *date_time_format;
|
|
Time_zone *time_zone;
|
|
MY_LOCALE *locale_value;
|
|
} save_result;
|
|
LEX_STRING base; /* for structs */
|
|
|
|
set_var(enum_var_type type_arg, sys_var *var_arg,
|
|
const LEX_STRING *base_name_arg, Item *value_arg)
|
|
:var(var_arg), type(type_arg), base(*base_name_arg)
|
|
{
|
|
/*
|
|
If the set value is a field, change it to a string to allow things like
|
|
SET table_type=MYISAM;
|
|
*/
|
|
if (value_arg && value_arg->type() == Item::FIELD_ITEM)
|
|
{
|
|
Item_field *item= (Item_field*) value_arg;
|
|
if (!(value=new Item_string(item->field_name,
|
|
(uint) strlen(item->field_name),
|
|
item->collation.collation)))
|
|
value=value_arg; /* Give error message later */
|
|
}
|
|
else
|
|
value=value_arg;
|
|
}
|
|
int check(THD *thd);
|
|
int update(THD *thd);
|
|
int light_check(THD *thd);
|
|
bool no_support_one_shot() { return var->no_support_one_shot; }
|
|
};
|
|
|
|
|
|
/* User variables like @my_own_variable */
|
|
|
|
class set_var_user: public set_var_base
|
|
{
|
|
Item_func_set_user_var *user_var_item;
|
|
public:
|
|
set_var_user(Item_func_set_user_var *item)
|
|
:user_var_item(item)
|
|
{}
|
|
int check(THD *thd);
|
|
int update(THD *thd);
|
|
int light_check(THD *thd);
|
|
};
|
|
|
|
/* For SET PASSWORD */
|
|
|
|
class set_var_password: public set_var_base
|
|
{
|
|
LEX_USER *user;
|
|
char *password;
|
|
public:
|
|
set_var_password(LEX_USER *user_arg,char *password_arg)
|
|
:user(user_arg), password(password_arg)
|
|
{}
|
|
int check(THD *thd);
|
|
int update(THD *thd);
|
|
};
|
|
|
|
|
|
/* For SET NAMES and SET CHARACTER SET */
|
|
|
|
class set_var_collation_client: public set_var_base
|
|
{
|
|
CHARSET_INFO *character_set_client;
|
|
CHARSET_INFO *character_set_results;
|
|
CHARSET_INFO *collation_connection;
|
|
public:
|
|
set_var_collation_client(CHARSET_INFO *client_coll_arg,
|
|
CHARSET_INFO *connection_coll_arg,
|
|
CHARSET_INFO *result_coll_arg)
|
|
:character_set_client(client_coll_arg),
|
|
character_set_results(result_coll_arg),
|
|
collation_connection(connection_coll_arg)
|
|
{}
|
|
int check(THD *thd);
|
|
int update(THD *thd);
|
|
};
|
|
|
|
|
|
extern "C"
|
|
{
|
|
typedef int (*process_key_cache_t) (const char *, KEY_CACHE *);
|
|
}
|
|
|
|
/* Named lists (used for keycaches) */
|
|
|
|
class NAMED_LIST :public ilink
|
|
{
|
|
const char *name;
|
|
uint name_length;
|
|
public:
|
|
uchar* data;
|
|
|
|
NAMED_LIST(I_List<NAMED_LIST> *links, const char *name_arg,
|
|
uint name_length_arg, uchar* data_arg)
|
|
:name_length(name_length_arg), data(data_arg)
|
|
{
|
|
name= my_strndup(name_arg, name_length, MYF(MY_WME));
|
|
links->push_back(this);
|
|
}
|
|
inline bool cmp(const char *name_cmp, uint length)
|
|
{
|
|
return length == name_length && !memcmp(name, name_cmp, length);
|
|
}
|
|
~NAMED_LIST()
|
|
{
|
|
my_free((uchar*) name, MYF(0));
|
|
}
|
|
friend bool process_key_caches(process_key_cache_t func);
|
|
friend void delete_elements(I_List<NAMED_LIST> *list,
|
|
void (*free_element)(const char*, uchar*));
|
|
};
|
|
|
|
/* updated in sql_acl.cc */
|
|
|
|
extern sys_var_thd_bool sys_old_alter_table;
|
|
extern sys_var_thd_bool sys_old_passwords;
|
|
extern LEX_STRING default_key_cache_base;
|
|
|
|
/* For sql_yacc */
|
|
struct sys_var_with_base
|
|
{
|
|
sys_var *var;
|
|
LEX_STRING base_name;
|
|
};
|
|
|
|
/*
|
|
Prototypes for helper functions
|
|
*/
|
|
|
|
int set_var_init();
|
|
void set_var_free();
|
|
SHOW_VAR* enumerate_sys_vars(THD *thd, bool sorted);
|
|
int mysql_add_sys_var_chain(sys_var *chain, struct my_option *long_options);
|
|
int mysql_del_sys_var_chain(sys_var *chain);
|
|
sys_var *find_sys_var(THD *thd, const char *str, uint length=0);
|
|
int sql_set_variables(THD *thd, List<set_var_base> *var_list);
|
|
bool not_all_support_one_shot(List<set_var_base> *var_list);
|
|
void fix_delay_key_write(THD *thd, enum_var_type type);
|
|
void fix_slave_exec_mode(enum_var_type type);
|
|
ulong fix_sql_mode(ulong sql_mode);
|
|
extern sys_var_const_str sys_charset_system;
|
|
extern sys_var_str sys_init_connect;
|
|
extern sys_var_str sys_init_slave;
|
|
extern sys_var_thd_time_zone sys_time_zone;
|
|
extern sys_var_thd_bit sys_autocommit;
|
|
CHARSET_INFO *get_old_charset_by_name(const char *old_name);
|
|
uchar* find_named(I_List<NAMED_LIST> *list, const char *name, uint length,
|
|
NAMED_LIST **found);
|
|
|
|
extern sys_var_str sys_var_general_log_path, sys_var_slow_log_path;
|
|
|
|
/* key_cache functions */
|
|
KEY_CACHE *get_key_cache(LEX_STRING *cache_name);
|
|
KEY_CACHE *get_or_create_key_cache(const char *name, uint length);
|
|
void free_key_cache(const char *name, KEY_CACHE *key_cache);
|
|
bool process_key_caches(process_key_cache_t func);
|
|
void delete_elements(I_List<NAMED_LIST> *list,
|
|
void (*free_element)(const char*, uchar*));
|