/* Copyright (C) 2002-2006 MySQL AB, 2009-2010 Sun Microsystems, Inc. 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, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* How to add new variables: 1. copy one of the existing variables, and edit the declaration. 2. if you need special behavior on assignment or additional checks use ON_CHECK and ON_UPDATE callbacks. 3. *Don't* add new Sys_var classes or uncle Occam will come with his razor to haunt you at nights Note - all storage engine variables (for example myisam_whatever) should go into the corresponding storage engine sources (for example in storage/myisam/ha_myisam.cc) ! */ #include "sys_vars.h" #include "events.h" #include #include "slave.h" #include "rpl_mi.h" #ifdef WITH_PERFSCHEMA_STORAGE_ENGINE #include "../storage/perfschema/pfs_server.h" #endif /* WITH_PERFSCHEMA_STORAGE_ENGINE */ /* The rule for this file: everything should be 'static'. When a sys_var variable or a function from this file is - in very rare cases - needed elsewhere it should be explicitly declared 'export' here to show that it's not a mistakenly forgotten 'static' keyword. */ #define export /* not static */ #ifdef WITH_PERFSCHEMA_STORAGE_ENGINE #define PFS_TRAILING_PROPERTIES \ NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(NULL), ON_UPDATE(NULL), \ 0, NULL, sys_var::PARSE_EARLY static Sys_var_mybool Sys_pfs_enabled( "performance_schema", "Enable the performance schema.", READ_ONLY GLOBAL_VAR(pfs_param.m_enabled), CMD_LINE(OPT_ARG), DEFAULT(FALSE), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_events_waits_history_long_size( "performance_schema_events_waits_history_long_size", "Number of rows in EVENTS_WAITS_HISTORY_LONG.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_waits_history_long_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024*1024), DEFAULT(PFS_WAITS_HISTORY_LONG_SIZE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_events_waits_history_size( "performance_schema_events_waits_history_size", "Number of rows per thread in EVENTS_WAITS_HISTORY.", READ_ONLY GLOBAL_VAR(pfs_param.m_events_waits_history_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024), DEFAULT(PFS_WAITS_HISTORY_SIZE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_max_cond_classes( "performance_schema_max_cond_classes", "Maximum number of condition instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_cond_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), DEFAULT(PFS_MAX_COND_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_max_cond_instances( "performance_schema_max_cond_instances", "Maximum number of instrumented condition objects.", READ_ONLY GLOBAL_VAR(pfs_param.m_cond_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024*1024), DEFAULT(PFS_MAX_COND), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_max_file_classes( "performance_schema_max_file_classes", "Maximum number of file instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_file_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), DEFAULT(PFS_MAX_FILE_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_max_file_handles( "performance_schema_max_file_handles", "Maximum number of opened instrumented files.", READ_ONLY GLOBAL_VAR(pfs_param.m_file_handle_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024*1024), DEFAULT(PFS_MAX_FILE_HANDLE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_max_file_instances( "performance_schema_max_file_instances", "Maximum number of instrumented files.", READ_ONLY GLOBAL_VAR(pfs_param.m_file_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024*1024), DEFAULT(PFS_MAX_FILE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_max_mutex_classes( "performance_schema_max_mutex_classes", "Maximum number of mutex instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_mutex_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), DEFAULT(PFS_MAX_MUTEX_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_max_mutex_instances( "performance_schema_max_mutex_instances", "Maximum number of instrumented MUTEX objects.", READ_ONLY GLOBAL_VAR(pfs_param.m_mutex_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024*1024), DEFAULT(PFS_MAX_MUTEX), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_max_rwlock_classes( "performance_schema_max_rwlock_classes", "Maximum number of rwlock instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_rwlock_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), DEFAULT(PFS_MAX_RWLOCK_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_max_rwlock_instances( "performance_schema_max_rwlock_instances", "Maximum number of instrumented RWLOCK objects.", READ_ONLY GLOBAL_VAR(pfs_param.m_rwlock_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024*1024), DEFAULT(PFS_MAX_RWLOCK), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_max_table_handles( "performance_schema_max_table_handles", "Maximum number of opened instrumented tables.", READ_ONLY GLOBAL_VAR(pfs_param.m_table_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024*1024), DEFAULT(PFS_MAX_TABLE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_max_table_instances( "performance_schema_max_table_instances", "Maximum number of instrumented tables.", READ_ONLY GLOBAL_VAR(pfs_param.m_table_share_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024*1024), DEFAULT(PFS_MAX_TABLE_SHARE), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_max_thread_classes( "performance_schema_max_thread_classes", "Maximum number of thread instruments.", READ_ONLY GLOBAL_VAR(pfs_param.m_thread_class_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 256), DEFAULT(PFS_MAX_THREAD_CLASS), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); static Sys_var_ulong Sys_pfs_max_thread_instances( "performance_schema_max_thread_instances", "Maximum number of instrumented threads.", READ_ONLY GLOBAL_VAR(pfs_param.m_thread_sizing), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024*1024), DEFAULT(PFS_MAX_THREAD), BLOCK_SIZE(1), PFS_TRAILING_PROPERTIES); #endif /* WITH_PERFSCHEMA_STORAGE_ENGINE */ static Sys_var_ulong Sys_auto_increment_increment( "auto_increment_increment", "Auto-increment columns are incremented by this", SESSION_VAR(auto_increment_increment), CMD_LINE(OPT_ARG), VALID_RANGE(1, 65535), DEFAULT(1), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG); static Sys_var_ulong Sys_auto_increment_offset( "auto_increment_offset", "Offset added to Auto-increment columns. Used when " "auto-increment-increment != 1", SESSION_VAR(auto_increment_offset), CMD_LINE(OPT_ARG), VALID_RANGE(1, 65535), DEFAULT(1), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG); static Sys_var_mybool Sys_automatic_sp_privileges( "automatic_sp_privileges", "Creating and dropping stored procedures alters ACLs", GLOBAL_VAR(sp_automatic_privileges), CMD_LINE(OPT_ARG), DEFAULT(TRUE)); static Sys_var_ulong Sys_back_log( "back_log", "The number of outstanding connection requests " "MySQL can have. This comes into play when the main MySQL thread " "gets very many connection requests in a very short time", READ_ONLY GLOBAL_VAR(back_log), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 65535), DEFAULT(50), BLOCK_SIZE(1)); static Sys_var_charptr Sys_basedir( "basedir", "Path to installation directory. All paths are " "usually resolved relative to this", READ_ONLY GLOBAL_VAR(mysql_home_ptr), CMD_LINE(REQUIRED_ARG, 'b'), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_ulong Sys_binlog_cache_size( "binlog_cache_size", "The size of the cache to " "hold the SQL statements for the binary log during a " "transaction. If you often use big, multi-statement " "transactions you can increase this to get more performance", GLOBAL_VAR(binlog_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE, ULONG_MAX), DEFAULT(32768), BLOCK_SIZE(IO_SIZE)); static bool check_has_super(sys_var *self, THD *thd, set_var *var) { DBUG_ASSERT(self->scope() != sys_var::GLOBAL);// don't abuse check_has_super() #ifndef NO_EMBEDDED_ACCESS_CHECKS if (!(thd->security_ctx->master_access & SUPER_ACL)) { my_error(ER_SPECIFIC_ACCESS_DENIED_ERROR, MYF(0), "SUPER"); return true; } #endif return false; } static bool binlog_format_check(sys_var *self, THD *thd, set_var *var) { if (check_has_super(self, thd, var)) return true; if (var->type == OPT_GLOBAL || (thd->variables.binlog_format == var->save_result.ulonglong_value)) return false; /* If RBR and open temporary tables, their CREATE TABLE may not be in the binlog, so we can't toggle to SBR in this connection. */ if ((thd->variables.binlog_format == BINLOG_FORMAT_ROW) && thd->temporary_tables) { my_error(ER_TEMP_TABLE_PREVENTS_SWITCH_OUT_OF_RBR, MYF(0)); return true; } /* if in a stored function/trigger, it's too late to change mode */ if (thd->in_sub_stmt) { my_error(ER_STORED_FUNCTION_PREVENTS_SWITCH_BINLOG_FORMAT, MYF(0)); return true; } return false; } static bool fix_binlog_format_after_update(sys_var *self, THD *thd, enum_var_type type) { if (type == OPT_SESSION) thd->reset_current_stmt_binlog_row_based(); return false; } static Sys_var_enum Sys_binlog_format( "binlog_format", "What form of binary logging the master will " "use: either ROW for row-based binary logging, STATEMENT " "for statement-based binary logging, or MIXED. MIXED is statement-" "based binary logging except for those statements where only row-" "based is correct: those which involve user-defined functions (i.e. " "UDFs) or the UUID() function; for those, row-based binary logging is " "automatically used. If NDBCLUSTER is enabled and binlog-format is " "MIXED, the format switches to row-based and back implicitly per each " "query accessing an NDBCLUSTER table", SESSION_VAR(binlog_format), CMD_LINE(REQUIRED_ARG, OPT_BINLOG_FORMAT), binlog_format_names, DEFAULT(BINLOG_FORMAT_STMT), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(binlog_format_check), ON_UPDATE(fix_binlog_format_after_update)); static Sys_var_ulong Sys_bulk_insert_buff_size( "bulk_insert_buffer_size", "Size of tree cache used in bulk " "insert optimisation. Note that this is a limit per thread!", SESSION_VAR(bulk_insert_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(8192*1024), BLOCK_SIZE(1)); static Sys_var_charptr Sys_character_sets_dir( "character_sets_dir", "Directory where character sets are", READ_ONLY GLOBAL_VAR(charsets_dir), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); static bool check_not_null(sys_var *self, THD *thd, set_var *var) { return var->value && var->value->is_null(); } static bool check_charset(sys_var *self, THD *thd, set_var *var) { if (!var->value) return false; char buff[STRING_BUFFER_USUAL_SIZE]; if (var->value->result_type() == STRING_RESULT) { String str(buff, sizeof(buff), system_charset_info), *res; if (!(res=var->value->val_str(&str))) var->save_result.ptr= NULL; else if (!(var->save_result.ptr= get_charset_by_csname(res->c_ptr(), MY_CS_PRIMARY, MYF(0))) && !(var->save_result.ptr= get_old_charset_by_name(res->c_ptr()))) { ErrConvString err(res); my_error(ER_UNKNOWN_CHARACTER_SET, MYF(0), err.ptr()); return true; } } else // INT_RESULT { int csno= (int)var->value->val_int(); if (!(var->save_result.ptr= get_charset(csno, MYF(0)))) { my_error(ER_UNKNOWN_CHARACTER_SET, MYF(0), llstr(csno, buff)); return true; } } return false; } static bool check_charset_not_null(sys_var *self, THD *thd, set_var *var) { return check_charset(self, thd, var) || check_not_null(self, thd, var); } static Sys_var_struct Sys_character_set_system( "character_set_system", "The character set used by the server " "for storing identifiers", READ_ONLY GLOBAL_VAR(system_charset_info), NO_CMD_LINE, offsetof(CHARSET_INFO, csname), DEFAULT(0)); static Sys_var_struct Sys_character_set_server( "character_set_server", "The default character set", SESSION_VAR(collation_server), NO_CMD_LINE, offsetof(CHARSET_INFO, csname), DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_charset_not_null)); static bool check_charset_db(sys_var *self, THD *thd, set_var *var) { if (check_charset_not_null(self, thd, var)) return true; if (!var->value) // = DEFAULT var->save_result.ptr= thd->db_charset; return false; } static Sys_var_struct Sys_character_set_database( "character_set_database", " The character set used by the default database", SESSION_VAR(collation_database), NO_CMD_LINE, offsetof(CHARSET_INFO, csname), DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_charset_db)); static bool check_cs_client(sys_var *self, THD *thd, set_var *var) { if (check_charset_not_null(self, thd, var)) return true; // Currently, UCS-2 cannot be used as a client character set if (((CHARSET_INFO *)(var->save_result.ptr))->mbminlen > 1) return true; return false; } static bool fix_thd_charset(sys_var *self, THD *thd, enum_var_type type) { if (type == OPT_SESSION) thd->update_charset(); return false; } static Sys_var_struct Sys_character_set_client( "character_set_client", "The character set for statements " "that arrive from the client", SESSION_VAR(character_set_client), NO_CMD_LINE, offsetof(CHARSET_INFO, csname), DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_cs_client), ON_UPDATE(fix_thd_charset)); static Sys_var_struct Sys_character_set_connection( "character_set_connection", "The character set used for " "literals that do not have a character set introducer and for " "number-to-string conversion", SESSION_VAR(collation_connection), NO_CMD_LINE, offsetof(CHARSET_INFO, csname), DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_charset_not_null), ON_UPDATE(fix_thd_charset)); static Sys_var_struct Sys_character_set_results( "character_set_results", "The character set used for returning " "query results to the client", SESSION_VAR(character_set_results), NO_CMD_LINE, offsetof(CHARSET_INFO, csname), DEFAULT(&default_charset_info), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_charset)); static Sys_var_struct Sys_character_set_filesystem( "character_set_filesystem", "The filesystem character set", SESSION_VAR(character_set_filesystem), NO_CMD_LINE, offsetof(CHARSET_INFO, csname), DEFAULT(&character_set_filesystem), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_charset_not_null), ON_UPDATE(fix_thd_charset)); static const char *completion_type_names[]= {"NO_CHAIN", "CHAIN", "RELEASE", 0}; static Sys_var_enum Sys_completion_type( "completion_type", "The transaction completion type, one of " "NO_CHAIN, CHAIN, RELEASE", SESSION_VAR(completion_type), CMD_LINE(REQUIRED_ARG), completion_type_names, DEFAULT(0)); static bool check_collation_not_null(sys_var *self, THD *thd, set_var *var) { if (!var->value) return false; char buff[STRING_BUFFER_USUAL_SIZE]; if (var->value->result_type() == STRING_RESULT) { String str(buff, sizeof(buff), system_charset_info), *res; if (!(res= var->value->val_str(&str))) var->save_result.ptr= NULL; else if (!(var->save_result.ptr= get_charset_by_name(res->c_ptr(), MYF(0)))) { ErrConvString err(res); my_error(ER_UNKNOWN_COLLATION, MYF(0), err.ptr()); return true; } } else // INT_RESULT { int csno= (int)var->value->val_int(); if (!(var->save_result.ptr= get_charset(csno, MYF(0)))) { my_error(ER_UNKNOWN_COLLATION, MYF(0), llstr(csno, buff)); return true; } } return check_not_null(self, thd, var); } static Sys_var_struct Sys_collation_connection( "collation_connection", "The collation of the connection " "character set", SESSION_VAR(collation_connection), NO_CMD_LINE, offsetof(CHARSET_INFO, name), DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_collation_not_null), ON_UPDATE(fix_thd_charset)); static bool check_collation_db(sys_var *self, THD *thd, set_var *var) { if (check_collation_not_null(self, thd, var)) return true; if (!var->value) // = DEFAULT var->save_result.ptr= thd->db_charset; return false; } static Sys_var_struct Sys_collation_database( "collation_database", "The collation of the database " "character set", SESSION_VAR(collation_database), NO_CMD_LINE, offsetof(CHARSET_INFO, name), DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_collation_db)); static Sys_var_struct Sys_collation_server( "collation_server", "The server default collation", SESSION_VAR(collation_server), NO_CMD_LINE, offsetof(CHARSET_INFO, name), DEFAULT(&default_charset_info), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_collation_not_null)); static const char *concurrent_insert_names[]= {"NEVER", "AUTO", "ALWAYS", 0}; static Sys_var_enum Sys_concurrent_insert( "concurrent_insert", "Use concurrent insert with MyISAM. Possible " "values are NEVER, AUTO, ALWAYS", GLOBAL_VAR(myisam_concurrent_insert), CMD_LINE(OPT_ARG), concurrent_insert_names, DEFAULT(1)); static Sys_var_ulong Sys_connect_timeout( "connect_timeout", "The number of seconds the mysqld server is waiting for a connect " "packet before responding with 'Bad handshake'", GLOBAL_VAR(connect_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(2, LONG_TIMEOUT), DEFAULT(CONNECT_TIMEOUT), BLOCK_SIZE(1)); static Sys_var_charptr Sys_datadir( "datadir", "Path to the database root directory", READ_ONLY GLOBAL_VAR(mysql_real_data_home_ptr), CMD_LINE(REQUIRED_ARG, 'h'), IN_FS_CHARSET, DEFAULT(0)); #ifndef DBUG_OFF static Sys_var_dbug Sys_dbug( "debug", "Debug log", sys_var::SESSION, CMD_LINE(OPT_ARG, '#'), DEFAULT(""), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_has_super)); #endif /** @todo When updating myisam_delay_key_write, we should do a 'flush tables' of all MyISAM tables to ensure that they are reopen with the new attribute. */ export bool fix_delay_key_write(sys_var *self, THD *thd, enum_var_type type) { switch (delay_key_write_options) { case DELAY_KEY_WRITE_NONE: myisam_delay_key_write=0; break; case DELAY_KEY_WRITE_ON: myisam_delay_key_write=1; break; case DELAY_KEY_WRITE_ALL: myisam_delay_key_write=1; ha_open_options|= HA_OPEN_DELAY_KEY_WRITE; break; } return false; } static const char *delay_key_write_names[]= { "OFF", "ON", "ALL", NullS }; static Sys_var_enum Sys_delay_key_write( "delay_key_write", "Type of DELAY_KEY_WRITE", GLOBAL_VAR(delay_key_write_options), CMD_LINE(OPT_ARG), delay_key_write_names, DEFAULT(DELAY_KEY_WRITE_ON), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_delay_key_write)); static Sys_var_ulong Sys_delayed_insert_limit( "delayed_insert_limit", "After inserting delayed_insert_limit rows, the INSERT DELAYED " "handler will check if there are any SELECT statements pending. " "If so, it allows these to execute before continuing", GLOBAL_VAR(delayed_insert_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(DELAYED_LIMIT), BLOCK_SIZE(1)); static Sys_var_ulong Sys_delayed_insert_timeout( "delayed_insert_timeout", "How long a INSERT DELAYED thread should wait for INSERT statements " "before terminating", GLOBAL_VAR(delayed_insert_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(DELAYED_WAIT_TIMEOUT), BLOCK_SIZE(1)); static Sys_var_ulong Sys_delayed_queue_size( "delayed_queue_size", "What size queue (in rows) should be allocated for handling INSERT " "DELAYED. If the queue becomes full, any client that does INSERT " "DELAYED will wait until there is room in the queue again", GLOBAL_VAR(delayed_queue_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(DELAYED_QUEUE_SIZE), BLOCK_SIZE(1)); #ifdef HAVE_EVENT_SCHEDULER static const char *event_scheduler_names[]= { "OFF", "ON", "DISABLED", NullS }; static bool event_scheduler_check(sys_var *self, THD *thd, set_var *var) { /* DISABLED is only accepted on the command line */ if (var->save_result.ulonglong_value == Events::EVENTS_DISABLED) return true; /* If the scheduler was disabled because there are no/bad system tables, produce a more meaningful error message than ER_OPTION_PREVENTS_STATEMENT */ if (Events::check_if_system_tables_error()) return true; if (Events::opt_event_scheduler == Events::EVENTS_DISABLED) { my_error(ER_OPTION_PREVENTS_STATEMENT, MYF(0), "--event-scheduler=DISABLED or --skip-grant-tables"); return true; } return false; } static bool event_scheduler_update(sys_var *self, THD *thd, enum_var_type type) { mysql_mutex_unlock(&LOCK_global_system_variables); /* Events::start() is heavyweight. In particular it creates a new THD, which takes LOCK_global_system_variables internally. Thus we have to release it here. We need to re-take it before returning, though. And we need to take it *without* holding Events::LOCK_event_metadata. */ bool ret= Events::opt_event_scheduler == Events::EVENTS_ON ? Events::start() : Events::stop(); mysql_mutex_unlock(&Events::LOCK_event_metadata); mysql_mutex_lock(&LOCK_global_system_variables); mysql_mutex_lock(&Events::LOCK_event_metadata); if (ret) my_error(ER_EVENT_SET_VAR_ERROR, MYF(0)); return ret; } static PolyLock_mutex PLock_event_metadata(&Events::LOCK_event_metadata); static Sys_var_enum Sys_event_scheduler( "event_scheduler", "Enable the event scheduler. Possible values are " "ON, OFF, and DISABLED (keep the event scheduler completely " "deactivated, it cannot be activated run-time)", GLOBAL_VAR(Events::opt_event_scheduler), CMD_LINE(OPT_ARG), event_scheduler_names, DEFAULT(Events::EVENTS_OFF), &PLock_event_metadata, NOT_IN_BINLOG, ON_CHECK(event_scheduler_check), ON_UPDATE(event_scheduler_update)); #endif static Sys_var_ulong Sys_expire_logs_days( "expire_logs_days", "If non-zero, binary logs will be purged after expire_logs_days " "days; possible purges happen at startup and at binary log rotation", GLOBAL_VAR(expire_logs_days), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 99), DEFAULT(0), BLOCK_SIZE(1)); static Sys_var_mybool Sys_flush( "flush", "Flush MyISAM tables to disk between SQL commands", GLOBAL_VAR(myisam_flush), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); static Sys_var_ulong Sys_flush_time( "flush_time", "A dedicated thread is created to flush all tables at the " "given interval", GLOBAL_VAR(flush_time), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(FLUSH_TIME), BLOCK_SIZE(1)); static bool check_ftb_syntax(sys_var *self, THD *thd, set_var *var) { return ft_boolean_check_syntax_string((uchar*) (var->save_result.string_value.str)); } static bool query_cache_flush(sys_var *self, THD *thd, enum_var_type type) { #ifdef HAVE_QUERY_CACHE query_cache.flush(); #endif /* HAVE_QUERY_CACHE */ return false; } /// @todo make SESSION_VAR (usability enhancement and a fix for a race condition) static Sys_var_charptr Sys_ft_boolean_syntax( "ft_boolean_syntax", "List of operators for " "MATCH ... AGAINST ( ... IN BOOLEAN MODE)", GLOBAL_VAR(ft_boolean_syntax), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(DEFAULT_FTB_SYNTAX), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_ftb_syntax), ON_UPDATE(query_cache_flush)); static Sys_var_ulong Sys_ft_max_word_len( "ft_max_word_len", "The maximum length of the word to be included in a FULLTEXT index. " "Note: FULLTEXT indexes must be rebuilt after changing this variable", READ_ONLY GLOBAL_VAR(ft_max_word_len), CMD_LINE(REQUIRED_ARG), VALID_RANGE(10, HA_FT_MAXCHARLEN), DEFAULT(HA_FT_MAXCHARLEN), BLOCK_SIZE(1)); static Sys_var_ulong Sys_ft_min_word_len( "ft_min_word_len", "The minimum length of the word to be included in a FULLTEXT index. " "Note: FULLTEXT indexes must be rebuilt after changing this variable", READ_ONLY GLOBAL_VAR(ft_min_word_len), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, HA_FT_MAXCHARLEN), DEFAULT(4), BLOCK_SIZE(1)); /// @todo make it an updatable SESSION_VAR static Sys_var_ulong Sys_ft_query_expansion_limit( "ft_query_expansion_limit", "Number of best matches to use for query expansion", READ_ONLY GLOBAL_VAR(ft_query_expansion_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1000), DEFAULT(20), BLOCK_SIZE(1)); static Sys_var_charptr Sys_ft_stopword_file( "ft_stopword_file", "Use stopwords from this file instead of built-in list", READ_ONLY GLOBAL_VAR(ft_stopword_file), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_mybool Sys_ignore_builtin_innodb( "ignore_builtin_innodb", "Disable initialization of builtin InnoDB plugin", READ_ONLY GLOBAL_VAR(opt_ignore_builtin_innodb), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); static bool check_init_string(sys_var *self, THD *thd, set_var *var) { if (var->save_result.string_value.str == 0) { var->save_result.string_value.str= const_cast(""); var->save_result.string_value.length= 0; } return false; } static PolyLock_rwlock PLock_sys_init_connect(&LOCK_sys_init_connect); static Sys_var_lexstring Sys_init_connect( "init_connect", "Command(s) that are executed for each " "new connection", GLOBAL_VAR(opt_init_connect), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(""), &PLock_sys_init_connect, NOT_IN_BINLOG, ON_CHECK(check_init_string)); static Sys_var_charptr Sys_init_file( "init_file", "Read SQL commands from this file at startup", READ_ONLY GLOBAL_VAR(opt_init_file), IF_DISABLE_GRANT_OPTIONS(NO_CMD_LINE, CMD_LINE(REQUIRED_ARG)), IN_FS_CHARSET, DEFAULT(0)); static PolyLock_rwlock PLock_sys_init_slave(&LOCK_sys_init_slave); static Sys_var_lexstring Sys_init_slave( "init_slave", "Command(s) that are executed by a slave server " "each time the SQL thread starts", GLOBAL_VAR(opt_init_slave), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(""), &PLock_sys_init_slave, NOT_IN_BINLOG, ON_CHECK(check_init_string)); static Sys_var_ulong Sys_interactive_timeout( "interactive_timeout", "The number of seconds the server waits for activity on an interactive " "connection before closing it", SESSION_VAR(net_interactive_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(NET_WAIT_TIMEOUT), BLOCK_SIZE(1)); static Sys_var_ulong Sys_join_buffer_size( "join_buffer_size", "The size of the buffer that is used for full joins", SESSION_VAR(join_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(128, ULONG_MAX), DEFAULT(128*1024), BLOCK_SIZE(128)); static Sys_var_keycache Sys_key_buffer_size( "key_buffer_size", "The size of the buffer used for " "index blocks for MyISAM tables. Increase this to get better index " "handling (for all reads and multiple writes) to as much as you can " "afford", KEYCACHE_VAR(param_buff_size), CMD_LINE(REQUIRED_ARG, OPT_KEY_BUFFER_SIZE), VALID_RANGE(0, SIZE_T_MAX), DEFAULT(KEY_CACHE_SIZE), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(update_buffer_size)); static Sys_var_keycache Sys_key_cache_block_size( "key_cache_block_size", "The default size of key cache blocks", KEYCACHE_VAR(param_block_size), CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_BLOCK_SIZE), VALID_RANGE(512, 1024*16), DEFAULT(KEY_CACHE_BLOCK_SIZE), BLOCK_SIZE(512), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(update_keycache_param)); static Sys_var_keycache Sys_key_cache_division_limit( "key_cache_division_limit", "The minimum percentage of warm blocks in key cache", KEYCACHE_VAR(param_division_limit), CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_DIVISION_LIMIT), VALID_RANGE(1, 100), DEFAULT(100), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(update_keycache_param)); static Sys_var_keycache Sys_key_cache_age_threshold( "key_cache_age_threshold", "This characterizes the number of " "hits a hot block has to be untouched until it is considered aged " "enough to be downgraded to a warm block. This specifies the " "percentage ratio of that number of hits to the total number of " "blocks in key cache", KEYCACHE_VAR(param_age_threshold), CMD_LINE(REQUIRED_ARG, OPT_KEY_CACHE_AGE_THRESHOLD), VALID_RANGE(100, ULONG_MAX), DEFAULT(300), BLOCK_SIZE(100), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(update_keycache_param)); static Sys_var_mybool Sys_large_files_support( "large_files_support", "Whether mysqld was compiled with options for large file support", READ_ONLY GLOBAL_VAR(opt_large_files), NO_CMD_LINE, DEFAULT(sizeof(my_off_t) > 4)); static Sys_var_uint Sys_large_page_size( "large_page_size", "If large page support is enabled, this shows the size of memory pages", READ_ONLY GLOBAL_VAR(opt_large_page_size), NO_CMD_LINE, VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1)); static Sys_var_mybool Sys_large_pages( "large_pages", "Enable support for large pages", READ_ONLY GLOBAL_VAR(opt_large_files), IF_WIN(NO_CMD_LINE, CMD_LINE(OPT_ARG)), DEFAULT(FALSE)); static Sys_var_charptr Sys_language( "lc_messages_dir", "Directory where error messages are", READ_ONLY GLOBAL_VAR(lc_messages_dir_ptr), CMD_LINE(REQUIRED_ARG, 'L'), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_mybool Sys_local_infile( "local_infile", "Enable LOAD DATA LOCAL INFILE", GLOBAL_VAR(opt_local_infile), CMD_LINE(OPT_ARG), DEFAULT(TRUE)); #ifdef HAVE_MLOCKALL static Sys_var_mybool Sys_locked_in_memory( "locked_in_memory", "Whether mysqld was locked in memory with --memlock", READ_ONLY GLOBAL_VAR(locked_in_memory), NO_CMD_LINE, DEFAULT(FALSE)); #endif /* this says NO_CMD_LINE, as command-line option takes a string, not a bool */ static Sys_var_mybool Sys_log_bin( "log_bin", "Whether the binary log is enabled", READ_ONLY GLOBAL_VAR(opt_bin_log), NO_CMD_LINE, DEFAULT(FALSE)); static Sys_var_mybool Sys_trust_function_creators( "log_bin_trust_function_creators", "If set to FALSE (the default), then when --log-bin is used, creation " "of a stored function (or trigger) is allowed only to users having the " "SUPER privilege and only if this stored function (trigger) may not " "break binary logging. Note that if ALL connections to this server " "ALWAYS use row-based binary logging, the security issues do not " "exist and the binary logging cannot break, so you can safely set " "this to TRUE", GLOBAL_VAR(trust_function_creators), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); static Sys_var_charptr Sys_log_error( "log_error", "Error log file", READ_ONLY GLOBAL_VAR(log_error_file_ptr), CMD_LINE(OPT_ARG), IN_FS_CHARSET, DEFAULT(disabled_my_option)); static Sys_var_mybool Sys_log_queries_not_using_indexes( "log_queries_not_using_indexes", "Log queries that are executed without benefit of any index to the " "slow log if it is open", GLOBAL_VAR(opt_log_queries_not_using_indexes), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); static Sys_var_ulong Sys_log_warnings( "log_warnings", "Log some not critical warnings to the log file", SESSION_VAR(log_warnings), CMD_LINE(OPT_ARG, 'W'), VALID_RANGE(0, ULONG_MAX), DEFAULT(1), BLOCK_SIZE(1)); static bool update_cached_long_query_time(sys_var *self, THD *thd, enum_var_type type) { if (type == OPT_SESSION) thd->variables.long_query_time= thd->variables.long_query_time_double * 1e6; else global_system_variables.long_query_time= global_system_variables.long_query_time_double * 1e6; return false; } static Sys_var_double Sys_long_query_time( "long_query_time", "Log all queries that have taken more than long_query_time seconds " "to execute to file. The argument will be treated as a decimal value " "with microsecond precision", SESSION_VAR(long_query_time_double), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(10), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(update_cached_long_query_time)); static bool fix_low_prio_updates(sys_var *self, THD *thd, enum_var_type type) { if (type == OPT_SESSION) thd->update_lock_default= (thd->variables.low_priority_updates ? TL_WRITE_LOW_PRIORITY : TL_WRITE); else thr_upgraded_concurrent_insert_lock= (global_system_variables.low_priority_updates ? TL_WRITE_LOW_PRIORITY : TL_WRITE); return false; } static Sys_var_mybool Sys_low_priority_updates( "low_priority_updates", "INSERT/DELETE/UPDATE has lower priority than selects", SESSION_VAR(low_priority_updates), CMD_LINE(OPT_ARG), DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_low_prio_updates)); #ifndef TO_BE_DELETED /* Alias for the low_priority_updates */ static Sys_var_mybool Sys_sql_low_priority_updates( "sql_low_priority_updates", "INSERT/DELETE/UPDATE has lower priority than selects", SESSION_VAR(low_priority_updates), NO_CMD_LINE, DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_low_prio_updates)); #endif static Sys_var_mybool Sys_lower_case_file_system( "lower_case_file_system", "Case sensitivity of file names on the file system where the " "data directory is located", READ_ONLY GLOBAL_VAR(lower_case_file_system), NO_CMD_LINE, DEFAULT(FALSE)); static Sys_var_uint Sys_lower_case_table_names( "lower_case_table_names", "If set to 1 table names are stored in lowercase on disk and table " "names will be case-insensitive. Should be set to 2 if you are using " "a case insensitive file system", READ_ONLY GLOBAL_VAR(lower_case_table_names), CMD_LINE(OPT_ARG, OPT_LOWER_CASE_TABLE_NAMES), VALID_RANGE(0, 2), #ifdef FN_NO_CASE_SENSE DEFAULT(1), #else DEFAULT(0), #endif BLOCK_SIZE(1)); static bool session_readonly(sys_var *self, THD *thd, set_var *var) { if (var->type == OPT_GLOBAL) return false; my_error(ER_VARIABLE_IS_READONLY, MYF(0), "SESSION", self->name.str, "GLOBAL"); return true; } static Sys_var_ulong Sys_max_allowed_packet( "max_allowed_packet", "Max packet length to send to or receive from the server", SESSION_VAR(max_allowed_packet), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, 1024*1024*1024), DEFAULT(1024*1024), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(session_readonly)); static Sys_var_ulonglong Sys_max_binlog_cache_size( "max_binlog_cache_size", "Can be used to restrict the total size used to cache a " "multi-transaction query", GLOBAL_VAR(max_binlog_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE, ULONGLONG_MAX), DEFAULT((ULONGLONG_MAX/IO_SIZE)*IO_SIZE), BLOCK_SIZE(IO_SIZE)); static bool fix_max_binlog_size(sys_var *self, THD *thd, enum_var_type type) { mysql_bin_log.set_max_size(max_binlog_size); #ifdef HAVE_REPLICATION if (!max_relay_log_size) active_mi->rli.relay_log.set_max_size(max_binlog_size); #endif return false; } static Sys_var_ulong Sys_max_binlog_size( "max_binlog_size", "Binary log will be rotated automatically when the size exceeds this " "value. Will also apply to relay logs if max_relay_log_size is 0", GLOBAL_VAR(max_binlog_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE, 1024*1024L*1024L), DEFAULT(1024*1024L*1024L), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_max_binlog_size)); static bool fix_max_connections(sys_var *self, THD *thd, enum_var_type type) { #ifndef EMBEDDED_LIBRARY resize_thr_alarm(max_connections + global_system_variables.max_insert_delayed_threads + 10); #endif return false; } // Default max_connections of 151 is larger than Apache's default max // children, to avoid "too many connections" error in a common setup static Sys_var_ulong Sys_max_connections( "max_connections", "The number of simultaneous clients allowed", GLOBAL_VAR(max_connections), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 100000), DEFAULT(151), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_max_connections)); static Sys_var_ulong Sys_max_connect_errors( "max_connect_errors", "If there is more than this number of interrupted connections from " "a host this host will be blocked from further connections", GLOBAL_VAR(max_connect_errors), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(MAX_CONNECT_ERRORS), BLOCK_SIZE(1)); static bool check_max_delayed_threads(sys_var *self, THD *thd, set_var *var) { return var->type != OPT_GLOBAL && var->save_result.ulonglong_value != 0 && var->save_result.ulonglong_value != global_system_variables.max_insert_delayed_threads; } // Alias for max_delayed_threads static Sys_var_ulong Sys_max_insert_delayed_threads( "max_insert_delayed_threads", "Don't start more than this number of threads to handle INSERT " "DELAYED statements. If set to zero INSERT DELAYED will be not used", SESSION_VAR(max_insert_delayed_threads), NO_CMD_LINE, VALID_RANGE(0, 16384), DEFAULT(20), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_max_delayed_threads), ON_UPDATE(fix_max_connections)); static Sys_var_ulong Sys_max_delayed_threads( "max_delayed_threads", "Don't start more than this number of threads to handle INSERT " "DELAYED statements. If set to zero INSERT DELAYED will be not used", SESSION_VAR(max_insert_delayed_threads), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 16384), DEFAULT(20), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_max_delayed_threads), ON_UPDATE(fix_max_connections)); static Sys_var_ulong Sys_max_error_count( "max_error_count", "Max number of errors/warnings to store for a statement", SESSION_VAR(max_error_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 65535), DEFAULT(DEFAULT_ERROR_COUNT), BLOCK_SIZE(1)); static Sys_var_ulonglong Sys_max_heap_table_size( "max_heap_table_size", "Don't allow creation of heap tables bigger than this", SESSION_VAR(max_heap_table_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(16384, (ulonglong)~(intptr)0), DEFAULT(16*1024*1024), BLOCK_SIZE(1024)); static Sys_var_ulong Sys_pseudo_thread_id( "pseudo_thread_id", "This variable is for internal server use", SESSION_ONLY(pseudo_thread_id), NO_CMD_LINE, VALID_RANGE(0, ULONG_MAX), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_has_super)); static bool fix_max_join_size(sys_var *self, THD *thd, enum_var_type type) { SV *sv= type == OPT_GLOBAL ? &global_system_variables : &thd->variables; if (sv->max_join_size == HA_POS_ERROR) sv->option_bits|= OPTION_BIG_SELECTS; else sv->option_bits&= ~OPTION_BIG_SELECTS; return false; } static Sys_var_harows Sys_max_join_size( "max_join_size", "Joins that are probably going to read more than max_join_size " "records return an error", SESSION_VAR(max_join_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, HA_POS_ERROR), DEFAULT(HA_POS_ERROR), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_max_join_size)); static Sys_var_ulong Sys_max_seeks_for_key( "max_seeks_for_key", "Limit assumed max number of seeks when looking up rows based on a key", SESSION_VAR(max_seeks_for_key), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(ULONG_MAX), BLOCK_SIZE(1)); static Sys_var_ulong Sys_max_length_for_sort_data( "max_length_for_sort_data", "Max number of bytes in sorted records", SESSION_VAR(max_length_for_sort_data), CMD_LINE(REQUIRED_ARG), VALID_RANGE(4, 8192*1024L), DEFAULT(1024), BLOCK_SIZE(1)); static Sys_var_harows Sys_sql_max_join_size( "sql_max_join_size", "Alias for max_join_size", SESSION_VAR(max_join_size), NO_CMD_LINE, VALID_RANGE(1, HA_POS_ERROR), DEFAULT(HA_POS_ERROR), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_max_join_size), DEPRECATED(70000, 0)); static PolyLock_mutex PLock_prepared_stmt_count(&LOCK_prepared_stmt_count); static Sys_var_ulong Sys_max_prepared_stmt_count( "max_prepared_stmt_count", "Maximum number of prepared statements in the server", GLOBAL_VAR(max_prepared_stmt_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024*1024), DEFAULT(16382), BLOCK_SIZE(1), &PLock_prepared_stmt_count); static bool fix_max_relay_log_size(sys_var *self, THD *thd, enum_var_type type) { #ifdef HAVE_REPLICATION active_mi->rli.relay_log.set_max_size(max_relay_log_size ? max_relay_log_size: max_binlog_size); #endif return false; } static Sys_var_ulong Sys_max_relay_log_size( "max_relay_log_size", "If non-zero: relay log will be rotated automatically when the " "size exceeds this value; if zero: when the size " "exceeds max_binlog_size", GLOBAL_VAR(max_relay_log_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1024L*1024*1024), DEFAULT(0), BLOCK_SIZE(IO_SIZE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_max_relay_log_size)); static Sys_var_ulong Sys_max_sort_length( "max_sort_length", "The number of bytes to use when sorting BLOB or TEXT values (only " "the first max_sort_length bytes of each value are used; the rest " "are ignored)", SESSION_VAR(max_sort_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(4, 8192*1024L), DEFAULT(1024), BLOCK_SIZE(1)); static Sys_var_ulong Sys_max_sp_recursion_depth( "max_sp_recursion_depth", "Maximum stored procedure recursion depth", SESSION_VAR(max_sp_recursion_depth), CMD_LINE(OPT_ARG), VALID_RANGE(0, 255), DEFAULT(0), BLOCK_SIZE(1)); // non-standard session_value_ptr() here static Sys_var_max_user_conn Sys_max_user_connections( "max_user_connections", "The maximum number of active connections for a single user " "(0 = no limit)", SESSION_VAR(max_user_connections), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(session_readonly)); static Sys_var_ulong Sys_max_tmp_tables( "max_tmp_tables", "Maximum number of temporary tables a client can keep open at a time", SESSION_VAR(max_tmp_tables), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(32), BLOCK_SIZE(1)); static Sys_var_ulong Sys_max_write_lock_count( "max_write_lock_count", "After this many write locks, allow some read locks to run in between", GLOBAL_VAR(max_write_lock_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(ULONG_MAX), BLOCK_SIZE(1)); static Sys_var_ulong Sys_min_examined_row_limit( "min_examined_row_limit", "Don't write queries to slow log that examine fewer rows " "than that", SESSION_VAR(min_examined_row_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(0), BLOCK_SIZE(1)); #ifdef _WIN32 static Sys_var_mybool Sys_named_pipe( "named_pipe", "Enable the named pipe (NT)", READ_ONLY GLOBAL_VAR(opt_enable_named_pipe), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); #endif static Sys_var_ulong Sys_net_buffer_length( "net_buffer_length", "Buffer length for TCP/IP and socket communication", SESSION_VAR(net_buffer_length), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, 1024*1024), DEFAULT(16384), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(session_readonly)); static bool fix_net_read_timeout(sys_var *self, THD *thd, enum_var_type type) { if (type != OPT_GLOBAL) my_net_set_read_timeout(&thd->net, thd->variables.net_read_timeout); return false; } static Sys_var_ulong Sys_net_read_timeout( "net_read_timeout", "Number of seconds to wait for more data from a connection before " "aborting the read", SESSION_VAR(net_read_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(NET_READ_TIMEOUT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_net_read_timeout)); static bool fix_net_write_timeout(sys_var *self, THD *thd, enum_var_type type) { if (type != OPT_GLOBAL) my_net_set_write_timeout(&thd->net, thd->variables.net_write_timeout); return false; } static Sys_var_ulong Sys_net_write_timeout( "net_write_timeout", "Number of seconds to wait for a block to be written to a connection " "before aborting the write", SESSION_VAR(net_write_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(NET_WRITE_TIMEOUT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_net_write_timeout)); static bool fix_net_retry_count(sys_var *self, THD *thd, enum_var_type type) { if (type != OPT_GLOBAL) thd->net.retry_count=thd->variables.net_retry_count; return false; } static Sys_var_ulong Sys_net_retry_count( "net_retry_count", "If a read on a communication port is interrupted, retry this " "many times before giving up", SESSION_VAR(net_retry_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(MYSQLD_NET_RETRY_COUNT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_net_retry_count)); static Sys_var_mybool Sys_new_mode( "new", "Use very new possible \"unsafe\" functions", SESSION_VAR(new_mode), CMD_LINE(OPT_ARG, 'n'), DEFAULT(FALSE)); static Sys_var_mybool Sys_old_mode( "old", "Use compatible behavior", READ_ONLY GLOBAL_VAR(old_mode), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); static Sys_var_mybool Sys_old_alter_table( "old_alter_table", "Use old, non-optimized alter table", SESSION_VAR(old_alter_table), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); static bool check_old_passwords(sys_var *self, THD *thd, set_var *var) { return mysql_user_table_is_in_short_password_format; } static Sys_var_mybool Sys_old_passwords( "old_passwords", "Use old password encryption method (needed for 4.0 and older clients)", SESSION_VAR(old_passwords), CMD_LINE(OPT_ARG), DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_old_passwords)); static Sys_var_ulong Sys_open_files_limit( "open_files_limit", "If this is not 0, then mysqld will use this value to reserve file " "descriptors to use with setrlimit(). If this value is 0 then mysqld " "will reserve max_connections*5 or max_connections + table_cache*2 " "(whichever is larger) number of file descriptors", READ_ONLY GLOBAL_VAR(open_files_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, OS_FILE_LIMIT), DEFAULT(0), BLOCK_SIZE(1)); /// @todo change to enum static Sys_var_ulong Sys_optimizer_prune_level( "optimizer_prune_level", "Controls the heuristic(s) applied during query optimization to prune " "less-promising partial plans from the optimizer search space. " "Meaning: 0 - do not apply any heuristic, thus perform exhaustive " "search; 1 - prune plans based on number of retrieved rows", SESSION_VAR(optimizer_prune_level), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 1), DEFAULT(1), BLOCK_SIZE(1)); static Sys_var_ulong Sys_optimizer_search_depth( "optimizer_search_depth", "Maximum depth of search performed by the query optimizer. Values " "larger than the number of relations in a query result in better " "query plans, but take longer to compile a query. Values smaller " "than the number of tables in a relation result in faster " "optimization, but may produce very bad query plans. If set to 0, " "the system will automatically pick a reasonable value; if set to " "63, the optimizer will switch to the original find_best search" "(used for testing/comparison)", SESSION_VAR(optimizer_search_depth), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, MAX_TABLES+2), DEFAULT(MAX_TABLES+1), BLOCK_SIZE(1)); static const char *optimizer_switch_names[]= { "index_merge", "index_merge_union", "index_merge_sort_union", "index_merge_intersection", "engine_condition_pushdown", "default", NullS }; /** propagates changes to @@engine_condition_pushdown */ static bool fix_optimizer_switch(sys_var *self, THD *thd, enum_var_type type) { SV *sv= (type == OPT_GLOBAL) ? &global_system_variables : &thd->variables; sv->engine_condition_pushdown= test(sv->optimizer_switch & OPTIMIZER_SWITCH_ENGINE_CONDITION_PUSHDOWN); return false; } static Sys_var_flagset Sys_optimizer_switch( "optimizer_switch", "optimizer_switch=option=val[,option=val...], where option is one of " "{index_merge, index_merge_union, index_merge_sort_union, " "index_merge_intersection, engine_condition_pushdown}" " and val is one of {on, off, default}", SESSION_VAR(optimizer_switch), CMD_LINE(REQUIRED_ARG), optimizer_switch_names, DEFAULT(OPTIMIZER_SWITCH_DEFAULT), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(NULL), ON_UPDATE(fix_optimizer_switch)); static Sys_var_charptr Sys_pid_file( "pid_file", "Pid file used by safe_mysqld", READ_ONLY GLOBAL_VAR(pidfile_name_ptr), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_charptr Sys_plugin_dir( "plugin_dir", "Directory for plugins", READ_ONLY GLOBAL_VAR(opt_plugin_dir_ptr), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_uint Sys_port( "port", "Port number to use for connection or 0 to default to, " "my.cnf, $MYSQL_TCP_PORT, " #if MYSQL_PORT_DEFAULT == 0 "/etc/services, " #endif "built-in default (" STRINGIFY_ARG(MYSQL_PORT) "), whatever comes first", READ_ONLY GLOBAL_VAR(mysqld_port), CMD_LINE(REQUIRED_ARG, 'P'), VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1)); static Sys_var_ulong Sys_preload_buff_size( "preload_buffer_size", "The size of the buffer that is allocated when preloading indexes", SESSION_VAR(preload_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, 1024*1024*1024), DEFAULT(32768), BLOCK_SIZE(1)); static Sys_var_uint Sys_protocol_version( "protocol_version", "The version of the client/server protocol used by the MySQL server", READ_ONLY GLOBAL_VAR(protocol_version), NO_CMD_LINE, VALID_RANGE(0, ~0), DEFAULT(PROTOCOL_VERSION), BLOCK_SIZE(1)); static Sys_var_ulong Sys_read_buff_size( "read_buffer_size", "Each thread that does a sequential scan allocates a buffer of " "this size for each table it scans. If you do many sequential scans, " "you may want to increase this value", SESSION_VAR(read_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(IO_SIZE*2, INT_MAX32), DEFAULT(128*1024), BLOCK_SIZE(IO_SIZE)); static my_bool read_only; static bool check_read_only(sys_var *self, THD *thd, set_var *var) { /* Prevent self dead-lock */ if (thd->locked_tables || thd->active_transaction()) { my_error(ER_LOCK_OR_ACTIVE_TRANSACTION, MYF(0)); return true; } return false; } static bool fix_read_only(sys_var *self, THD *thd, enum_var_type type) { bool result= true; my_bool new_read_only= read_only; // make a copy before releasing a mutex DBUG_ENTER("sys_var_opt_readonly::update"); if (read_only == FALSE || read_only == opt_readonly) { opt_readonly= read_only; DBUG_RETURN(false); } if (check_read_only(self, thd, 0)) // just in case goto end; if (thd->global_read_lock) { /* This connection already holds the global read lock. This can be the case with: - FLUSH TABLES WITH READ LOCK - SET GLOBAL READ_ONLY = 1 */ opt_readonly= read_only; DBUG_RETURN(false); } /* Perform a 'FLUSH TABLES WITH READ LOCK'. This is a 3 step process: - [1] lock_global_read_lock() - [2] close_cached_tables() - [3] make_global_read_lock_block_commit() [1] prevents new connections from obtaining tables locked for write. [2] waits until all existing connections close their tables. [3] prevents transactions from being committed. */ read_only= opt_readonly; mysql_mutex_unlock(&LOCK_global_system_variables); if (lock_global_read_lock(thd)) goto end_with_mutex_unlock; /* This call will be blocked by any connection holding a READ or WRITE lock. Ideally, we want to wait only for pending WRITE locks, but since: con 1> LOCK TABLE T FOR READ; con 2> LOCK TABLE T FOR WRITE; (blocked by con 1) con 3> SET GLOBAL READ ONLY=1; (blocked by con 2) can cause to wait on a read lock, it's required for the client application to unlock everything, and acceptable for the server to wait on all locks. */ if ((result= close_cached_tables(thd, NULL, FALSE, TRUE, TRUE))) goto end_with_read_lock; if ((result= make_global_read_lock_block_commit(thd))) goto end_with_read_lock; /* Change the opt_readonly system variable, safe because the lock is held */ opt_readonly= new_read_only; result= false; end_with_read_lock: /* Release the lock */ unlock_global_read_lock(thd); end_with_mutex_unlock: mysql_mutex_lock(&LOCK_global_system_variables); end: read_only= opt_readonly; DBUG_RETURN(result); } static Sys_var_mybool Sys_readonly( "read_only", "Make all non-temporary tables read-only, with the exception for " "replication (slave) threads and users with the SUPER privilege", GLOBAL_VAR(read_only), CMD_LINE(OPT_ARG), DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_read_only), ON_UPDATE(fix_read_only)); // Small lower limit to be able to test MRR static Sys_var_ulong Sys_read_rnd_buff_size( "read_rnd_buffer_size", "When reading rows in sorted order after a sort, the rows are read " "through this buffer to avoid a disk seeks. If not set, then it's " "set to the value of record_buffer", SESSION_VAR(read_rnd_buff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, INT_MAX32), DEFAULT(256*1024), BLOCK_SIZE(1)); static Sys_var_ulong Sys_div_precincrement( "div_precision_increment", "Precision of the result of '/' " "operator will be increased on that value", SESSION_VAR(div_precincrement), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, DECIMAL_MAX_SCALE), DEFAULT(4), BLOCK_SIZE(1)); static Sys_var_ulong Sys_rpl_recovery_rank( "rpl_recovery_rank", "Unused, will be removed", GLOBAL_VAR(rpl_recovery_rank), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(0), DEPRECATED(70000, 0)); static Sys_var_ulong Sys_range_alloc_block_size( "range_alloc_block_size", "Allocation block size for storing ranges during optimization", SESSION_VAR(range_alloc_block_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(RANGE_ALLOC_BLOCK_SIZE, ULONG_MAX), DEFAULT(RANGE_ALLOC_BLOCK_SIZE), BLOCK_SIZE(1024)); static Sys_var_ulong Sys_multi_range_count( "multi_range_count", "Number of key ranges to request at once", SESSION_VAR(multi_range_count), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, ULONG_MAX), DEFAULT(256), BLOCK_SIZE(1)); static bool fix_thd_mem_root(sys_var *self, THD *thd, enum_var_type type) { if (type != OPT_GLOBAL) reset_root_defaults(thd->mem_root, thd->variables.query_alloc_block_size, thd->variables.query_prealloc_size); return false; } static Sys_var_ulong Sys_query_alloc_block_size( "query_alloc_block_size", "Allocation block size for query parsing and execution", SESSION_VAR(query_alloc_block_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, ULONG_MAX), DEFAULT(QUERY_ALLOC_BLOCK_SIZE), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_thd_mem_root)); static Sys_var_ulong Sys_query_prealloc_size( "query_prealloc_size", "Persistent buffer for query parsing and execution", SESSION_VAR(query_prealloc_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(QUERY_ALLOC_PREALLOC_SIZE, ULONG_MAX), DEFAULT(QUERY_ALLOC_PREALLOC_SIZE), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_thd_mem_root)); #ifdef HAVE_SMEM static Sys_var_mybool Sys_shared_memory( "shared_memory", "Enable the shared memory", READ_ONLY GLOBAL_VAR(opt_enable_shared_memory), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); static Sys_var_charptr Sys_shared_memory_base_name( "shared_memory_base_name", "Base name of shared memory", READ_ONLY GLOBAL_VAR(shared_memory_base_name), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); #endif // this has to be NO_CMD_LINE as the command-line option has a different name static Sys_var_mybool Sys_skip_external_locking( "skip_external_locking", "Don't use system (external) locking", READ_ONLY GLOBAL_VAR(my_disable_locking), NO_CMD_LINE, DEFAULT(TRUE)); static Sys_var_mybool Sys_skip_networking( "skip_networking", "Don't allow connection with TCP/IP", READ_ONLY GLOBAL_VAR(opt_disable_networking), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); static Sys_var_mybool Sys_skip_show_database( "skip_show_database", "Don't allow 'SHOW DATABASE' commands", READ_ONLY GLOBAL_VAR(opt_skip_show_db), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); static Sys_var_charptr Sys_socket( "socket", "Socket file to use for connection", READ_ONLY GLOBAL_VAR(mysqld_unix_port), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); #ifdef HAVE_THR_SETCONCURRENCY static Sys_var_ulong Sys_thread_concurrency( "thread_concurrency", "Permits the application to give the threads system a hint for " "the desired number of threads that should be run at the same time", READ_ONLY GLOBAL_VAR(concurrency), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 512), DEFAULT(DEFAULT_CONCURRENCY), BLOCK_SIZE(1)); #endif static Sys_var_ulong Sys_thread_stack( "thread_stack", "The stack size for each thread", READ_ONLY GLOBAL_VAR(my_thread_stack_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(128*1024, ULONG_MAX), DEFAULT(DEFAULT_THREAD_STACK), BLOCK_SIZE(1024)); static Sys_var_charptr Sys_tmpdir( "tmpdir", "Path for temporary files. Several paths may " "be specified, separated by a " #if defined(__WIN__) || defined(__NETWARE__) "semicolon (;)" #else "colon (:)" #endif ", in this case they are used in a round-robin fashion", READ_ONLY GLOBAL_VAR(opt_mysql_tmpdir), CMD_LINE(REQUIRED_ARG, 't'), IN_FS_CHARSET, DEFAULT(0)); static bool fix_trans_mem_root(sys_var *self, THD *thd, enum_var_type type) { if (type != OPT_GLOBAL) reset_root_defaults(&thd->transaction.mem_root, thd->variables.trans_alloc_block_size, thd->variables.trans_prealloc_size); return false; } static Sys_var_ulong Sys_trans_alloc_block_size( "transaction_alloc_block_size", "Allocation block size for transactions to be stored in binary log", SESSION_VAR(trans_alloc_block_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, ULONG_MAX), DEFAULT(QUERY_ALLOC_BLOCK_SIZE), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_trans_mem_root)); static Sys_var_ulong Sys_trans_prealloc_size( "transaction_prealloc_size", "Persistent buffer for transactions to be stored in binary log", SESSION_VAR(trans_prealloc_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, ULONG_MAX), DEFAULT(TRANS_ALLOC_PREALLOC_SIZE), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_trans_mem_root)); static const char *thread_handling_names[]= { "one-thread-per-connection", "no-threads", #if HAVE_POOL_OF_THREADS == 1 "pool-of-threads", #endif 0 }; static Sys_var_enum Sys_thread_handling( "thread_handling", "Define threads usage for handling queries, one of " "one-thread-per-connection, no-threads" #if HAVE_POOL_OF_THREADS == 1 ", pool-of-threads" #endif , READ_ONLY GLOBAL_VAR(thread_handling), CMD_LINE(REQUIRED_ARG), thread_handling_names, DEFAULT(0)); #ifdef HAVE_QUERY_CACHE static bool fix_query_cache_size(sys_var *self, THD *thd, enum_var_type type) { ulong new_cache_size= query_cache.resize(query_cache_size); /* Note: query_cache_size is a global variable reflecting the requested cache size. See also query_cache_size_arg */ if (query_cache_size != new_cache_size) push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_WARN_QC_RESIZE, ER(ER_WARN_QC_RESIZE), query_cache_size, new_cache_size); query_cache_size= new_cache_size; return false; } static Sys_var_ulong Sys_query_cache_size( "query_cache_size", "The memory allocated to store results from old queries", GLOBAL_VAR(query_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(0), BLOCK_SIZE(1024), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_query_cache_size)); static Sys_var_ulong Sys_query_cache_limit( "query_cache_limit", "Don't cache results that are bigger than this", GLOBAL_VAR(query_cache.query_cache_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(1024*1024), BLOCK_SIZE(1)); static bool fix_qcache_min_res_unit(sys_var *self, THD *thd, enum_var_type type) { query_cache_min_res_unit= query_cache.set_min_res_unit(query_cache_min_res_unit); return false; } static Sys_var_ulong Sys_query_cache_min_res_unit( "query_cache_min_res_unit", "The minimum size for blocks allocated by the query cache", GLOBAL_VAR(query_cache_min_res_unit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(QUERY_CACHE_MIN_RESULT_DATA_SIZE), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_qcache_min_res_unit)); static const char *query_cache_type_names[]= { "OFF", "ON", "DEMAND", 0 }; static bool check_query_cache_type(sys_var *self, THD *thd, set_var *var) { if (query_cache.is_disabled()) { my_error(ER_QUERY_CACHE_DISABLED, MYF(0)); return true; } return false; } static Sys_var_enum Sys_query_cache_type( "query_cache_type", "OFF = Don't cache or retrieve results. ON = Cache all results " "except SELECT SQL_NO_CACHE ... queries. DEMAND = Cache only " "SELECT SQL_CACHE ... queries", SESSION_VAR(query_cache_type), CMD_LINE(REQUIRED_ARG), query_cache_type_names, DEFAULT(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_query_cache_type)); static Sys_var_mybool Sys_query_cache_wlock_invalidate( "query_cache_wlock_invalidate", "Invalidate queries in query cache on LOCK for write", SESSION_VAR(query_cache_wlock_invalidate), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); #endif /* HAVE_QUERY_CACHE */ static Sys_var_mybool Sys_secure_auth( "secure_auth", "Disallow authentication for accounts that have old (pre-4.1) " "passwords", GLOBAL_VAR(opt_secure_auth), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); static Sys_var_charptr Sys_secure_file_priv( "secure_file_priv", "Limit LOAD DATA, SELECT ... OUTFILE, and LOAD_FILE() to files " "within specified directory", PREALLOCATED READ_ONLY GLOBAL_VAR(opt_secure_file_priv), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); static bool fix_server_id(sys_var *self, THD *thd, enum_var_type type) { server_id_supplied = 1; thd->server_id= server_id; return false; } static Sys_var_ulong Sys_server_id( "server_id", "Uniquely identifies the server instance in the community of " "replication partners", GLOBAL_VAR(server_id), CMD_LINE(REQUIRED_ARG, OPT_SERVER_ID), VALID_RANGE(0, UINT_MAX32), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_server_id)); static Sys_var_mybool Sys_slave_compressed_protocol( "slave_compressed_protocol", "Use compression on master/slave protocol", GLOBAL_VAR(opt_slave_compressed_protocol), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); #ifdef HAVE_REPLICATION static const char *slave_exec_mode_names[]= {"STRICT", "IDEMPOTENT", 0}; static Sys_var_enum Slave_exec_mode( "slave_exec_mode", "Modes for how replication events should be executed. Legal values " "are STRICT (default) and IDEMPOTENT. In IDEMPOTENT mode, " "replication will not stop for operations that are idempotent. " "In STRICT mode, replication will stop on any unexpected difference " "between the master and the slave", GLOBAL_VAR(slave_exec_mode_options), CMD_LINE(REQUIRED_ARG), slave_exec_mode_names, DEFAULT(SLAVE_EXEC_MODE_STRICT)); #endif static Sys_var_ulong Sys_slow_launch_time( "slow_launch_time", "If creating the thread takes longer than this value (in seconds), " "the Slow_launch_threads counter will be incremented", GLOBAL_VAR(slow_launch_time), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, LONG_TIMEOUT), DEFAULT(2), BLOCK_SIZE(1)); static Sys_var_ulong Sys_sort_buffer( "sort_buffer_size", "Each thread that needs to do a sort allocates a buffer of this size", SESSION_VAR(sortbuff_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(MIN_SORT_MEMORY, ULONG_MAX), DEFAULT(MAX_SORT_MEMORY), BLOCK_SIZE(1)); export ulong expand_sql_mode(ulonglong sql_mode) { if (sql_mode & MODE_ANSI) { /* Note that we dont set MODE_NO_KEY_OPTIONS | MODE_NO_TABLE_OPTIONS | MODE_NO_FIELD_OPTIONS to allow one to get full use of MySQL in this mode. MODE_ONLY_FULL_GROUP_BY was removed from ANSI mode because it is currently overly restrictive (see BUG#8510). */ sql_mode|= (MODE_REAL_AS_FLOAT | MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES | MODE_IGNORE_SPACE); } if (sql_mode & MODE_ORACLE) sql_mode|= (MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES | MODE_IGNORE_SPACE | MODE_NO_KEY_OPTIONS | MODE_NO_TABLE_OPTIONS | MODE_NO_FIELD_OPTIONS | MODE_NO_AUTO_CREATE_USER); if (sql_mode & MODE_MSSQL) sql_mode|= (MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES | MODE_IGNORE_SPACE | MODE_NO_KEY_OPTIONS | MODE_NO_TABLE_OPTIONS | MODE_NO_FIELD_OPTIONS); if (sql_mode & MODE_POSTGRESQL) sql_mode|= (MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES | MODE_IGNORE_SPACE | MODE_NO_KEY_OPTIONS | MODE_NO_TABLE_OPTIONS | MODE_NO_FIELD_OPTIONS); if (sql_mode & MODE_DB2) sql_mode|= (MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES | MODE_IGNORE_SPACE | MODE_NO_KEY_OPTIONS | MODE_NO_TABLE_OPTIONS | MODE_NO_FIELD_OPTIONS); if (sql_mode & MODE_MAXDB) sql_mode|= (MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES | MODE_IGNORE_SPACE | MODE_NO_KEY_OPTIONS | MODE_NO_TABLE_OPTIONS | MODE_NO_FIELD_OPTIONS | MODE_NO_AUTO_CREATE_USER); if (sql_mode & MODE_MYSQL40) sql_mode|= MODE_HIGH_NOT_PRECEDENCE; if (sql_mode & MODE_MYSQL323) sql_mode|= MODE_HIGH_NOT_PRECEDENCE; if (sql_mode & MODE_TRADITIONAL) sql_mode|= (MODE_STRICT_TRANS_TABLES | MODE_STRICT_ALL_TABLES | MODE_NO_ZERO_IN_DATE | MODE_NO_ZERO_DATE | MODE_ERROR_FOR_DIVISION_BY_ZERO | MODE_NO_AUTO_CREATE_USER | MODE_NO_ENGINE_SUBSTITUTION); return sql_mode; } static bool check_sql_mode(sys_var *self, THD *thd, set_var *var) { var->save_result.ulonglong_value= expand_sql_mode(var->save_result.ulonglong_value); return false; } static bool fix_sql_mode(sys_var *self, THD *thd, enum_var_type type) { if (type != OPT_GLOBAL) { /* Update thd->server_status */ if (thd->variables.sql_mode & MODE_NO_BACKSLASH_ESCAPES) thd->server_status|= SERVER_STATUS_NO_BACKSLASH_ESCAPES; else thd->server_status&= ~SERVER_STATUS_NO_BACKSLASH_ESCAPES; } return false; } /* WARNING: When adding new SQL modes don't forget to update the tables definitions that stores it's value (ie: mysql.event, mysql.proc) */ static const char *sql_mode_names[]= { "REAL_AS_FLOAT", "PIPES_AS_CONCAT", "ANSI_QUOTES", "IGNORE_SPACE", ",", "ONLY_FULL_GROUP_BY", "NO_UNSIGNED_SUBTRACTION", "NO_DIR_IN_CREATE", "POSTGRESQL", "ORACLE", "MSSQL", "DB2", "MAXDB", "NO_KEY_OPTIONS", "NO_TABLE_OPTIONS", "NO_FIELD_OPTIONS", "MYSQL323", "MYSQL40", "ANSI", "NO_AUTO_VALUE_ON_ZERO", "NO_BACKSLASH_ESCAPES", "STRICT_TRANS_TABLES", "STRICT_ALL_TABLES", "NO_ZERO_IN_DATE", "NO_ZERO_DATE", "ALLOW_INVALID_DATES", "ERROR_FOR_DIVISION_BY_ZERO", "TRADITIONAL", "NO_AUTO_CREATE_USER", "HIGH_NOT_PRECEDENCE", "NO_ENGINE_SUBSTITUTION", "PAD_CHAR_TO_FULL_LENGTH", 0 }; export bool sql_mode_string_representation(THD *thd, ulong sql_mode, LEX_STRING *ls) { set_to_string(thd, ls, sql_mode, sql_mode_names); return ls->str == 0; } /* sql_mode should *not* be IN_BINLOG: even though it is written to the binlog, the slave ignores the MODE_NO_DIR_IN_CREATE variable, so slave's value differs from master's (see log_event.cc: Query_log_event::do_apply_event()). */ static Sys_var_set Sys_sql_mode( "sql_mode", "Syntax: sql-mode=mode[,mode[,mode...]]. See the manual for the " "complete list of valid sql modes", SESSION_VAR(sql_mode), CMD_LINE(REQUIRED_ARG), sql_mode_names, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_sql_mode), ON_UPDATE(fix_sql_mode)); #ifdef HAVE_OPENSSL #define SSL_OPT(X) CMD_LINE(REQUIRED_ARG,X) #else #define SSL_OPT(X) NO_CMD_LINE #endif static Sys_var_charptr Sys_ssl_ca( "ssl_ca", "CA file in PEM format (check OpenSSL docs, implies --ssl)", READ_ONLY GLOBAL_VAR(opt_ssl_ca), SSL_OPT(OPT_SSL_CA), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_charptr Sys_ssl_capath( "ssl_capath", "CA directory (check OpenSSL docs, implies --ssl)", READ_ONLY GLOBAL_VAR(opt_ssl_capath), SSL_OPT(OPT_SSL_CAPATH), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_charptr Sys_ssl_cert( "ssl_cert", "X509 cert in PEM format (implies --ssl)", READ_ONLY GLOBAL_VAR(opt_ssl_cert), SSL_OPT(OPT_SSL_CERT), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_charptr Sys_ssl_cipher( "ssl_cipher", "SSL cipher to use (implies --ssl)", READ_ONLY GLOBAL_VAR(opt_ssl_cipher), SSL_OPT(OPT_SSL_CIPHER), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_charptr Sys_ssl_key( "ssl_key", "X509 key in PEM format (implies --ssl)", READ_ONLY GLOBAL_VAR(opt_ssl_key), SSL_OPT(OPT_SSL_KEY), IN_FS_CHARSET, DEFAULT(0)); // why ENUM and not BOOL ? static const char *updatable_views_with_limit_names[]= {"NO", "YES", 0}; static Sys_var_enum Sys_updatable_views_with_limit( "updatable_views_with_limit", "YES = Don't issue an error message (warning only) if a VIEW without " "presence of a key of the underlying table is used in queries with a " "LIMIT clause for updating. NO = Prohibit update of a VIEW, which " "does not contain a key of the underlying table and the query uses " "a LIMIT clause (usually get from GUI tools)", SESSION_VAR(updatable_views_with_limit), CMD_LINE(REQUIRED_ARG), updatable_views_with_limit_names, DEFAULT(TRUE)); static Sys_var_mybool Sys_sync_frm( "sync_frm", "Sync .frm files to disk on creation", GLOBAL_VAR(opt_sync_frm), CMD_LINE(OPT_ARG), DEFAULT(TRUE)); static char *system_time_zone_ptr; static Sys_var_charptr Sys_system_time_zone( "system_time_zone", "The server system time zone", READ_ONLY GLOBAL_VAR(system_time_zone_ptr), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(system_time_zone)); static Sys_var_ulong Sys_table_def_size( "table_definition_cache", "The number of cached table definitions", GLOBAL_VAR(table_def_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(TABLE_DEF_CACHE_MIN, 512*1024), DEFAULT(TABLE_DEF_CACHE_DEFAULT), BLOCK_SIZE(1)); static Sys_var_ulong Sys_table_cache_size( "table_open_cache", "The number of cached open tables", GLOBAL_VAR(table_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 512*1024), DEFAULT(TABLE_OPEN_CACHE_DEFAULT), BLOCK_SIZE(1)); static Sys_var_ulong Sys_table_lock_wait_timeout( "table_lock_wait_timeout", "Timeout in seconds to wait for a table level lock before returning an " "error. Used only if the connection has active cursors", GLOBAL_VAR(table_lock_wait_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 1024*1024*1024), DEFAULT(50), BLOCK_SIZE(1)); static Sys_var_ulong Sys_thread_cache_size( "thread_cache_size", "How many threads we should keep in a cache for reuse", GLOBAL_VAR(thread_cache_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 16384), DEFAULT(0), BLOCK_SIZE(1)); #if HAVE_POOL_OF_THREADS == 1 static Sys_var_ulong Sys_thread_pool_size( "thread_pool_size", "How many threads we should create to handle query requests in " "case of 'thread_handling=pool-of-threads'", GLOBAL_VAR(thread_pool_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, 16384), DEFAULT(20), BLOCK_SIZE(0)); #endif // Can't change the 'next' tx_isolation if we are already in a transaction static bool check_tx_isolation(sys_var *self, THD *thd, set_var *var) { if (var->type == OPT_DEFAULT && (thd->server_status & SERVER_STATUS_IN_TRANS)) { my_error(ER_CANT_CHANGE_TX_ISOLATION, MYF(0)); return true; } return false; } /* If one doesn't use the SESSION modifier, the isolation level is only active for the next command. */ static bool fix_tx_isolation(sys_var *self, THD *thd, enum_var_type type) { if (type == OPT_SESSION) thd->session_tx_isolation= (enum_tx_isolation)thd->variables.tx_isolation; return false; } // NO_CMD_LINE - different name of the option static Sys_var_enum Sys_tx_isolation( "tx_isolation", "Default transaction isolation level", SESSION_VAR(tx_isolation), NO_CMD_LINE, tx_isolation_names, DEFAULT(ISO_REPEATABLE_READ), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_tx_isolation), ON_UPDATE(fix_tx_isolation)); static Sys_var_ulonglong Sys_tmp_table_size( "tmp_table_size", "If an internal in-memory temporary table exceeds this size, MySQL " "will automatically convert it to an on-disk MyISAM table", SESSION_VAR(tmp_table_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1024, (ulonglong)~(intptr)0), DEFAULT(16*1024*1024), BLOCK_SIZE(1)); static Sys_var_mybool Sys_timed_mutexes( "timed_mutexes", "Specify whether to time mutexes (only InnoDB mutexes are currently " "supported)", GLOBAL_VAR(timed_mutexes), CMD_LINE(OPT_ARG), DEFAULT(0)); static char *server_version_ptr; static Sys_var_charptr Sys_version( "version", "Server version", READ_ONLY GLOBAL_VAR(server_version_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(server_version)); static char *server_version_comment_ptr; static Sys_var_charptr Sys_version_comment( "version_comment", "version_comment", READ_ONLY GLOBAL_VAR(server_version_comment_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(MYSQL_COMPILATION_COMMENT)); static char *server_version_compile_machine_ptr; static Sys_var_charptr Sys_version_compile_machine( "version_compile_machine", "version_compile_machine", READ_ONLY GLOBAL_VAR(server_version_compile_machine_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(MACHINE_TYPE)); static char *server_version_compile_os_ptr; static Sys_var_charptr Sys_version_compile_os( "version_compile_os", "version_compile_os", READ_ONLY GLOBAL_VAR(server_version_compile_os_ptr), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(SYSTEM_TYPE)); static Sys_var_ulong Sys_net_wait_timeout( "wait_timeout", "The number of seconds the server waits for activity on a " "connection before closing it", SESSION_VAR(net_wait_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, IF_WIN(INT_MAX32/1000, LONG_TIMEOUT)), DEFAULT(NET_WAIT_TIMEOUT), BLOCK_SIZE(1)); /** propagates changes to the relevant flag of @@optimizer_switch */ static bool fix_engine_condition_pushdown(sys_var *self, THD *thd, enum_var_type type) { SV *sv= (type == OPT_GLOBAL) ? &global_system_variables : &thd->variables; if (sv->engine_condition_pushdown) sv->optimizer_switch|= OPTIMIZER_SWITCH_ENGINE_CONDITION_PUSHDOWN; else sv->optimizer_switch&= ~OPTIMIZER_SWITCH_ENGINE_CONDITION_PUSHDOWN; return false; } static Sys_var_mybool Sys_engine_condition_pushdown( "engine_condition_pushdown", "Push supported query conditions to the storage engine." " Deprecated, use --optimizer-switch instead.", SESSION_VAR(engine_condition_pushdown), CMD_LINE(OPT_ARG, OPT_ENGINE_CONDITION_PUSHDOWN), DEFAULT(TRUE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(NULL), ON_UPDATE(fix_engine_condition_pushdown), DEPRECATED(70000, "'@@optimizer_switch'")); static Sys_var_plugin Sys_default_storage_engine( "default_storage_engine", "The default storage engine for new tables", SESSION_VAR(table_plugin), NO_CMD_LINE, MYSQL_STORAGE_ENGINE_PLUGIN, DEFAULT(&default_storage_engine), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_not_null)); // Alias for @@default_storage_engine static Sys_var_plugin Sys_storage_engine( "storage_engine", "Alias for @@default_storage_engine. Deprecated", SESSION_VAR(table_plugin), NO_CMD_LINE, MYSQL_STORAGE_ENGINE_PLUGIN, DEFAULT(&default_storage_engine), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_not_null)); #if defined(ENABLED_DEBUG_SYNC) /* Variable can be set for the session only. This could be changed later. Then we need to have a global array of actions in addition to the thread local ones. SET GLOBAL would manage the global array, SET [SESSION] the local array. A sync point would need to look for a local and a global action. Setting and executing of global actions need to be protected by a mutex. The purpose of global actions could be to allow synchronizing with connectionless threads that cannot execute SET statements. */ static Sys_var_debug_sync Sys_debug_sync( "debug_sync", "Debug Sync Facility", sys_var::ONLY_SESSION, NO_CMD_LINE, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_has_super)); #endif /* defined(ENABLED_DEBUG_SYNC) */ /** "time_format" "date_format" "datetime_format" the following three variables are unused, and the source of confusion (bug reports like "I've changed date_format, but date format hasn't changed. I've made them read-only, to alleviate the situation somewhat. @todo make them NO_CMD_LINE ? */ static Sys_var_charptr Sys_date_format( "date_format", "The DATE format (ignored)", READ_ONLY GLOBAL_VAR(global_date_format.format.str), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(known_date_time_formats[ISO_FORMAT].date_format)); static Sys_var_charptr Sys_datetime_format( "datetime_format", "The DATETIME format (ignored)", READ_ONLY GLOBAL_VAR(global_datetime_format.format.str), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(known_date_time_formats[ISO_FORMAT].datetime_format)); static Sys_var_charptr Sys_time_format( "time_format", "The TIME format (ignored)", READ_ONLY GLOBAL_VAR(global_time_format.format.str), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(known_date_time_formats[ISO_FORMAT].time_format)); static bool fix_autocommit(sys_var *self, THD *thd, enum_var_type type) { if (type == OPT_GLOBAL) { if (global_system_variables.option_bits & OPTION_AUTOCOMMIT) global_system_variables.option_bits&= ~OPTION_NOT_AUTOCOMMIT; else global_system_variables.option_bits|= OPTION_NOT_AUTOCOMMIT; return false; } if (thd->variables.option_bits & OPTION_AUTOCOMMIT && thd->variables.option_bits & OPTION_NOT_AUTOCOMMIT) { // activating autocommit if (ha_commit(thd)) { thd->variables.option_bits&= ~OPTION_AUTOCOMMIT; return true; } thd->variables.option_bits&= ~(OPTION_BEGIN | OPTION_KEEP_LOG | OPTION_NOT_AUTOCOMMIT); thd->transaction.all.modified_non_trans_table= false; thd->server_status|= SERVER_STATUS_AUTOCOMMIT; return false; } if (!(thd->variables.option_bits & OPTION_AUTOCOMMIT) && !(thd->variables.option_bits & OPTION_NOT_AUTOCOMMIT)) { // disabling autocommit thd->transaction.all.modified_non_trans_table= false; thd->server_status&= ~SERVER_STATUS_AUTOCOMMIT; thd->variables.option_bits|= OPTION_NOT_AUTOCOMMIT; return false; } return false; // autocommit value wasn't changed } static Sys_var_bit Sys_autocommit( "autocommit", "autocommit", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_AUTOCOMMIT, DEFAULT(TRUE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_autocommit)); export sys_var *Sys_autocommit_ptr= &Sys_autocommit; // for sql_yacc.yy static Sys_var_mybool Sys_big_tables( "big_tables", "Allow big result sets by saving all " "temporary sets on file (Solves most 'table full' errors)", SESSION_VAR(big_tables), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); #ifndef TO_BE_DELETED /* Alias for big_tables */ static Sys_var_mybool Sys_sql_big_tables( "sql_big_tables", "alias for big_tables", SESSION_VAR(big_tables), NO_CMD_LINE, DEFAULT(FALSE)); #endif static Sys_var_bit Sys_big_selects( "sql_big_selects", "sql_big_selects", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_BIG_SELECTS, DEFAULT(FALSE)); static Sys_var_bit Sys_log_off( "sql_log_off", "sql_log_off", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_LOG_OFF, DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_has_super)); static bool fix_sql_log_bin(sys_var *self, THD *thd, enum_var_type type) { if (type != OPT_GLOBAL && !thd->in_sub_stmt) thd->sql_log_bin_toplevel= thd->variables.option_bits & OPTION_BIN_LOG; return false; } static Sys_var_bit Sys_log_binlog( "sql_log_bin", "sql_log_bin", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_BIN_LOG, DEFAULT(TRUE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_has_super), ON_UPDATE(fix_sql_log_bin)); static bool deprecated_log_update(sys_var *self, THD *thd, set_var *var) { /* The update log is not supported anymore since 5.0. See sql/mysqld.cc/, comments in function init_server_components() for an explaination of the different warnings we send below */ if (opt_sql_bin_update) push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_UPDATE_LOG_DEPRECATED_TRANSLATED, ER(ER_UPDATE_LOG_DEPRECATED_TRANSLATED)); else push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_UPDATE_LOG_DEPRECATED_IGNORED, ER(ER_UPDATE_LOG_DEPRECATED_IGNORED)); return check_has_super(self, thd, var); } static Sys_var_bit Sys_log_update( "sql_log_update", "alias for sql_log_bin", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_BIN_LOG, DEFAULT(TRUE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(deprecated_log_update), ON_UPDATE(fix_sql_log_bin)); static Sys_var_bit Sys_sql_warnings( "sql_warnings", "sql_warnings", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_WARNINGS, DEFAULT(FALSE)); static Sys_var_bit Sys_sql_notes( "sql_notes", "sql_notes", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_SQL_NOTES, DEFAULT(TRUE)); static Sys_var_bit Sys_auto_is_null( "sql_auto_is_null", "sql_auto_is_null", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_AUTO_IS_NULL, DEFAULT(FALSE), NO_MUTEX_GUARD, IN_BINLOG); static Sys_var_bit Sys_safe_updates( "sql_safe_updates", "sql_safe_updates", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_SAFE_UPDATES, DEFAULT(FALSE)); static Sys_var_bit Sys_buffer_results( "sql_buffer_result", "sql_buffer_result", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_BUFFER_RESULT, DEFAULT(FALSE)); static Sys_var_bit Sys_quote_show_create( "sql_quote_show_create", "sql_quote_show_create", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_QUOTE_SHOW_CREATE, DEFAULT(TRUE)); static Sys_var_bit Sys_foreign_key_checks( "foreign_key_checks", "foreign_key_checks", SESSION_VAR(option_bits), NO_CMD_LINE, REVERSE(OPTION_NO_FOREIGN_KEY_CHECKS), DEFAULT(TRUE), NO_MUTEX_GUARD, IN_BINLOG); static Sys_var_bit Sys_unique_checks( "unique_checks", "unique_checks", SESSION_VAR(option_bits), NO_CMD_LINE, REVERSE(OPTION_RELAXED_UNIQUE_CHECKS), DEFAULT(TRUE), NO_MUTEX_GUARD, IN_BINLOG); #ifdef ENABLED_PROFILING static Sys_var_bit Sys_profiling( "profiling", "profiling", SESSION_VAR(option_bits), NO_CMD_LINE, OPTION_PROFILING, DEFAULT(FALSE)); static Sys_var_ulong Sys_profiling_history_size( "profiling_history_size", "Limit of query profiling memory", SESSION_VAR(profiling_history_size), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 100), DEFAULT(15), BLOCK_SIZE(1)); #endif static Sys_var_harows Sys_select_limit( "sql_select_limit", "The maximum number of rows to return from SELECT statements", SESSION_VAR(select_limit), NO_CMD_LINE, VALID_RANGE(1, HA_POS_ERROR), DEFAULT(HA_POS_ERROR), BLOCK_SIZE(1)); static bool update_timestamp(THD *thd, set_var *var) { if (var->value) thd->set_time((time_t) var->save_result.ulonglong_value); else // SET timestamp=DEFAULT thd->user_time= 0; return false; } static ulonglong read_timestamp(THD *thd) { return (ulonglong) thd->start_time; } static Sys_var_session_special Sys_timestamp( "timestamp", "Set the time for this client", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ~(time_t)0), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(0), ON_UPDATE(update_timestamp), ON_READ(read_timestamp)); static bool update_last_insert_id(THD *thd, set_var *var) { if (!var->value) { my_error(ER_NO_DEFAULT, MYF(0), var->var->name); return true; } thd->first_successful_insert_id_in_prev_stmt= var->save_result.ulonglong_value; return false; } static ulonglong read_last_insert_id(THD *thd) { return (ulonglong) thd->read_first_successful_insert_id_in_prev_stmt(); } static Sys_var_session_special Sys_last_insert_id( "last_insert_id", "The value to be returned from LAST_INSERT_ID()", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULONGLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(0), ON_UPDATE(update_last_insert_id), ON_READ(read_last_insert_id)); // alias for last_insert_id(), Sybase-style static Sys_var_session_special Sys_identity( "identity", "Synonym for the last_insert_id variable", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULONGLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(0), ON_UPDATE(update_last_insert_id), ON_READ(read_last_insert_id)); /* insert_id should *not* be marked as written to the binlog (i.e., it should *not* be IN_BINLOG), because we want any statement that refers to insert_id explicitly to be unsafe. (By "explicitly", we mean using @@session.insert_id, whereas insert_id is used "implicitly" when NULL value is inserted into an auto_increment column). We want statements referring explicitly to @@session.insert_id to be unsafe, because insert_id is modified internally by the slave sql thread when NULL values are inserted in an AUTO_INCREMENT column. This modification interfers with the value of the @@session.insert_id variable if @@session.insert_id is referred explicitly by an insert statement (as is seen by executing "SET @@session.insert_id=0; CREATE TABLE t (a INT, b INT KEY AUTO_INCREMENT); INSERT INTO t(a) VALUES (@@session.insert_id);" in statement-based logging mode: t will be different on master and slave). */ static bool update_insert_id(THD *thd, set_var *var) { if (!var->value) { my_error(ER_NO_DEFAULT, MYF(0), var->var->name); return true; } thd->force_one_auto_inc_interval(var->save_result.ulonglong_value); return false; } static ulonglong read_insert_id(THD *thd) { return thd->auto_inc_intervals_forced.minimum(); } static Sys_var_session_special Sys_insert_id( "insert_id", "The value to be used by the following INSERT " "or ALTER TABLE statement when inserting an AUTO_INCREMENT value", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULONGLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(update_insert_id), ON_READ(read_insert_id)); static bool update_rand_seed1(THD *thd, set_var *var) { if (!var->value) { my_error(ER_NO_DEFAULT, MYF(0), var->var->name); return true; } thd->rand.seed1= (ulong) var->save_result.ulonglong_value; return false; } static ulonglong read_rand_seed(THD *thd) { return 0; } static Sys_var_session_special Sys_rand_seed1( "rand_seed1", "Sets the internal state of the RAND() " "generator for replication purposes", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(0), ON_UPDATE(update_rand_seed1), ON_READ(read_rand_seed)); static bool update_rand_seed2(THD *thd, set_var *var) { if (!var->value) { my_error(ER_NO_DEFAULT, MYF(0), var->var->name); return true; } thd->rand.seed2= (ulong) var->save_result.ulonglong_value; return false; } static Sys_var_session_special Sys_rand_seed2( "rand_seed2", "Sets the internal state of the RAND() " "generator for replication purposes", sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(0), ON_UPDATE(update_rand_seed2), ON_READ(read_rand_seed)); static ulonglong read_error_count(THD *thd) { return thd->warning_info->error_count(); } // this really belongs to the SHOW STATUS static Sys_var_session_special Sys_error_count( "error_count", "The number of errors that resulted from the " "last statement that generated messages", READ_ONLY sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULONGLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(0), ON_READ(read_error_count)); static ulonglong read_warning_count(THD *thd) { return thd->warning_info->warn_count(); } // this really belongs to the SHOW STATUS static Sys_var_session_special Sys_warning_count( "warning_count", "The number of errors, warnings, and notes " "that resulted from the last statement that generated messages", READ_ONLY sys_var::ONLY_SESSION, NO_CMD_LINE, VALID_RANGE(0, ULONGLONG_MAX), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(0), ON_READ(read_warning_count)); static Sys_var_ulong Sys_default_week_format( "default_week_format", "The default week format used by WEEK() functions", SESSION_VAR(default_week_format), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, 7), DEFAULT(0), BLOCK_SIZE(1)); static Sys_var_ulong Sys_group_concat_max_len( "group_concat_max_len", "The maximum length of the result of function GROUP_CONCAT()", SESSION_VAR(group_concat_max_len), CMD_LINE(REQUIRED_ARG), VALID_RANGE(4, ULONG_MAX), DEFAULT(1024), BLOCK_SIZE(1)); static char *glob_hostname_ptr; static Sys_var_charptr Sys_hostname( "hostname", "Server host name", READ_ONLY GLOBAL_VAR(glob_hostname_ptr), NO_CMD_LINE, IN_FS_CHARSET, DEFAULT(glob_hostname)); #ifndef EMBEDDED_LIBRARY static Sys_var_charptr Sys_repl_report_host( "report_host", "Hostname or IP of the slave to be reported to the master during " "slave registration. Will appear in the output of SHOW SLAVE HOSTS. " "Leave unset if you do not want the slave to register itself with the " "master. Note that it is not sufficient for the master to simply read " "the IP of the slave off the socket once the slave connects. Due to " "NAT and other routing issues, that IP may not be valid for connecting " "to the slave from the master or other hosts", READ_ONLY GLOBAL_VAR(report_host), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_charptr Sys_repl_report_user( "report_user", "The account user name of the slave to be reported to the master " "during slave registration", READ_ONLY GLOBAL_VAR(report_user), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_charptr Sys_repl_report_password( "report_password", "The account password of the slave to be reported to the master " "during slave registration", READ_ONLY GLOBAL_VAR(report_password), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_uint Sys_repl_report_port( "report_port", "Port for connecting to slave reported to the master during slave " "registration. Set it only if the slave is listening on a non-default " "port or if you have a special tunnel from the master or other clients " "to the slave. If not sure, leave this option unset", READ_ONLY GLOBAL_VAR(report_port), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(MYSQL_PORT), BLOCK_SIZE(1)); #endif static Sys_var_mybool Sys_keep_files_on_create( "keep_files_on_create", "Don't overwrite stale .MYD and .MYI even if no directory is specified", SESSION_VAR(keep_files_on_create), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); static char *license; static Sys_var_charptr Sys_license( "license", "The type of license the server has", READ_ONLY GLOBAL_VAR(license), NO_CMD_LINE, IN_SYSTEM_CHARSET, DEFAULT(STRINGIFY_ARG(LICENSE))); static bool check_log_path(sys_var *self, THD *thd, set_var *var) { if (!var->value) return false; // DEFAULT is ok if (!var->save_result.string_value.str) return true; if (var->save_result.string_value.length > FN_REFLEN) { // path is too long my_error(ER_PATH_LENGTH, MYF(0), self->name.str); return true; } char path[FN_REFLEN]; size_t path_length= unpack_filename(path, var->save_result.string_value.str); if (!path_length) return true; MY_STAT f_stat; if (my_stat(path, &f_stat, MYF(0))) { if (!MY_S_ISREG(f_stat.st_mode) || !(f_stat.st_mode & MY_S_IWRITE)) return true; // not a regular writable file return false; } (void) dirname_part(path, var->save_result.string_value.str, &path_length); if (var->save_result.string_value.length - path_length >= FN_LEN) { // filename is too long my_error(ER_PATH_LENGTH, MYF(0), self->name.str); return true; } if (!path_length) // no path is good path (remember, relative to datadir) return false; if (my_access(path, (F_OK|W_OK))) return true; // directory is not writable return false; } static bool fix_log(char** logname, const char* default_logname, const char*ext, bool enabled, void (*reopen)(char*)) { if (!*logname) // SET ... = DEFAULT { char buff[FN_REFLEN]; *logname= my_strdup(make_log_name(buff, default_logname, ext), MYF(MY_FAE+MY_WME)); if (!*logname) return true; } logger.lock_exclusive(); mysql_mutex_unlock(&LOCK_global_system_variables); if (enabled) reopen(*logname); logger.unlock(); mysql_mutex_lock(&LOCK_global_system_variables); return false; } static void reopen_general_log(char* name) { logger.get_log_file_handler()->close(0); logger.get_log_file_handler()->open_query_log(name); } static bool fix_general_log_file(sys_var *self, THD *thd, enum_var_type type) { return fix_log(&opt_logname, default_logfile_name, ".log", opt_log, reopen_general_log); } static Sys_var_charptr Sys_general_log_path( "general_log_file", "Log connections and queries to given file", PREALLOCATED GLOBAL_VAR(opt_logname), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_log_path), ON_UPDATE(fix_general_log_file)); static void reopen_slow_log(char* name) { logger.get_slow_log_file_handler()->close(0); logger.get_slow_log_file_handler()->open_slow_log(name); } static bool fix_slow_log_file(sys_var *self, THD *thd, enum_var_type type) { return fix_log(&opt_slow_logname, default_logfile_name, "-slow.log", opt_slow_log, reopen_slow_log); } static Sys_var_charptr Sys_slow_log_path( "slow_query_log_file", "Log slow queries to given log file. " "Defaults logging to hostname-slow.log. Must be enabled to activate " "other slow log options", PREALLOCATED GLOBAL_VAR(opt_slow_logname), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_log_path), ON_UPDATE(fix_slow_log_file)); /// @todo deprecate these four legacy have_PLUGIN variables and use I_S instead export SHOW_COMP_OPTION have_csv, have_innodb; export SHOW_COMP_OPTION have_ndbcluster, have_partitioning; static Sys_var_have Sys_have_csv( "have_csv", "have_csv", READ_ONLY GLOBAL_VAR(have_csv), NO_CMD_LINE); static Sys_var_have Sys_have_innodb( "have_innodb", "have_innodb", READ_ONLY GLOBAL_VAR(have_innodb), NO_CMD_LINE); static Sys_var_have Sys_have_ndbcluster( "have_ndbcluster", "have_ndbcluster", READ_ONLY GLOBAL_VAR(have_ndbcluster), NO_CMD_LINE); static Sys_var_have Sys_have_partition_db( "have_partitioning", "have_partitioning", READ_ONLY GLOBAL_VAR(have_partitioning), NO_CMD_LINE); static Sys_var_have Sys_have_compress( "have_compress", "have_compress", READ_ONLY GLOBAL_VAR(have_compress), NO_CMD_LINE); static Sys_var_have Sys_have_crypt( "have_crypt", "have_crypt", READ_ONLY GLOBAL_VAR(have_crypt), NO_CMD_LINE); static Sys_var_have Sys_have_dlopen( "have_dynamic_loading", "have_dynamic_loading", READ_ONLY GLOBAL_VAR(have_dlopen), NO_CMD_LINE); static Sys_var_have Sys_have_geometry( "have_geometry", "have_geometry", READ_ONLY GLOBAL_VAR(have_geometry), NO_CMD_LINE); static Sys_var_have Sys_have_openssl( "have_openssl", "have_openssl", READ_ONLY GLOBAL_VAR(have_ssl), NO_CMD_LINE); static Sys_var_have Sys_have_profiling( "have_profiling", "have_profiling", READ_ONLY GLOBAL_VAR(have_profiling), NO_CMD_LINE); static Sys_var_have Sys_have_query_cache( "have_query_cache", "have_query_cache", READ_ONLY GLOBAL_VAR(have_query_cache), NO_CMD_LINE); static Sys_var_have Sys_have_rtree_keys( "have_rtree_keys", "have_rtree_keys", READ_ONLY GLOBAL_VAR(have_rtree_keys), NO_CMD_LINE); static Sys_var_have Sys_have_ssl( "have_ssl", "have_ssl", READ_ONLY GLOBAL_VAR(have_ssl), NO_CMD_LINE); static Sys_var_have Sys_have_symlink( "have_symlink", "have_symlink", READ_ONLY GLOBAL_VAR(have_symlink), NO_CMD_LINE); static bool fix_log_state(sys_var *self, THD *thd, enum_var_type type); static Sys_var_mybool Sys_general_log( "general_log", "Log connections and queries to a table or log file. " "Defaults logging to a file hostname.log or a table mysql.general_log" "if --log-output=TABLE is used", GLOBAL_VAR(opt_log), CMD_LINE(OPT_ARG), DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_log_state)); // Synonym of "general_log" for consistency with SHOW VARIABLES output static Sys_var_mybool Sys_log( "log", "Alias for --general-log. Deprecated", GLOBAL_VAR(opt_log), NO_CMD_LINE, DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_log_state), DEPRECATED(70000, "'@@general_log'")); static Sys_var_mybool Sys_slow_query_log( "slow_query_log", "Log slow queries to a table or log file. Defaults logging to a file " "hostname-slow.log or a table mysql.slow_log if --log-output=TABLE is " "used. Must be enabled to activate other slow log options", GLOBAL_VAR(opt_slow_log), CMD_LINE(OPT_ARG), DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_log_state)); /* Synonym of "slow_query_log" for consistency with SHOW VARIABLES output */ static Sys_var_mybool Sys_log_slow( "log_slow_queries", "Alias for --slow-query-log. Deprecated", GLOBAL_VAR(opt_slow_log), NO_CMD_LINE, DEFAULT(FALSE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_log_state), DEPRECATED(70000, "'@@slow_query_log'")); static bool fix_log_state(sys_var *self, THD *thd, enum_var_type type) { bool res; my_bool *newvalptr, newval, oldval; uint log_type; if (self == &Sys_general_log || self == &Sys_log) { newvalptr= &opt_log; oldval= logger.get_log_file_handler()->is_open(); log_type= QUERY_LOG_GENERAL; } else if (self == &Sys_slow_query_log || self == &Sys_log_slow) { newvalptr= &opt_slow_log; oldval= logger.get_slow_log_file_handler()->is_open(); log_type= QUERY_LOG_SLOW; } else DBUG_ASSERT(FALSE); newval= *newvalptr; if (oldval == newval) return false; *newvalptr= oldval; // [de]activate_log_handler works that way (sigh) mysql_mutex_unlock(&LOCK_global_system_variables); if (!newval) { logger.deactivate_log_handler(thd, log_type); res= false; } else res= logger.activate_log_handler(thd, log_type); mysql_mutex_lock(&LOCK_global_system_variables); return res; } static bool check_not_empty_set(sys_var *self, THD *thd, set_var *var) { return var->save_result.ulonglong_value == 0; } static bool fix_log_output(sys_var *self, THD *thd, enum_var_type type) { logger.lock_exclusive(); logger.init_slow_log(log_output_options); logger.init_general_log(log_output_options); logger.unlock(); return false; } static Sys_var_set Sys_log_output( "log_output", "Syntax: log-output=value[,value...], " "where \"value\" could be TABLE, FILE or NONE", GLOBAL_VAR(log_output_options), CMD_LINE(REQUIRED_ARG), log_output_names, DEFAULT(LOG_FILE), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_not_empty_set), ON_UPDATE(fix_log_output)); #ifdef HAVE_REPLICATION static Sys_var_mybool Sys_log_slave_updates( "log_slave_updates", "Tells the slave to log the updates from " "the slave thread to the binary log. You will need to turn it on if " "you plan to daisy-chain the slaves", READ_ONLY GLOBAL_VAR(opt_log_slave_updates), CMD_LINE(OPT_ARG), DEFAULT(0)); static Sys_var_charptr Sys_relay_log( "relay_log", "The location and name to use for relay logs", READ_ONLY GLOBAL_VAR(opt_relay_logname), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_charptr Sys_relay_log_index( "relay_log_index", "The location and name to use for the file " "that keeps a list of the last relay logs", READ_ONLY GLOBAL_VAR(opt_relaylog_index_name), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_charptr Sys_relay_log_info_file( "relay_log_info_file", "The location and name of the file that " "remembers where the SQL replication thread is in the relay logs", READ_ONLY GLOBAL_VAR(relay_log_info_file), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); static Sys_var_mybool Sys_relay_log_purge( "relay_log_purge", "if disabled - do not purge relay logs. " "if enabled - purge them as soon as they are no more needed", GLOBAL_VAR(relay_log_purge), CMD_LINE(OPT_ARG), DEFAULT(TRUE)); static Sys_var_mybool Sys_relay_log_recovery( "relay_log_recovery", "Enables automatic relay log recovery " "right after the database startup, which means that the IO Thread " "starts re-fetching from the master right after the last transaction " "processed", GLOBAL_VAR(relay_log_recovery), CMD_LINE(OPT_ARG), DEFAULT(FALSE)); static Sys_var_charptr Sys_slave_load_tmpdir( "slave_load_tmpdir", "The location where the slave should put " "its temporary files when replicating a LOAD DATA INFILE command", READ_ONLY GLOBAL_VAR(slave_load_tmpdir), CMD_LINE(REQUIRED_ARG), IN_FS_CHARSET, DEFAULT(0)); static bool fix_slave_net_timeout(sys_var *self, THD *thd, enum_var_type type) { mysql_mutex_lock(&LOCK_active_mi); DBUG_PRINT("info", ("slave_net_timeout=%lu mi->heartbeat_period=%.3f", slave_net_timeout, (active_mi? active_mi->heartbeat_period : 0.0))); if (active_mi && slave_net_timeout < active_mi->heartbeat_period) push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_SLAVE_HEARTBEAT_VALUE_OUT_OF_RANGE, "The current value for master_heartbeat_period" " exceeds the new value of `slave_net_timeout' sec." " A sensible value for the period should be" " less than the timeout."); mysql_mutex_unlock(&LOCK_active_mi); return false; } static Sys_var_ulong Sys_slave_net_timeout( "slave_net_timeout", "Number of seconds to wait for more data " "from a master/slave connection before aborting the read", GLOBAL_VAR(slave_net_timeout), CMD_LINE(REQUIRED_ARG), VALID_RANGE(1, LONG_TIMEOUT), DEFAULT(SLAVE_NET_TIMEOUT), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(0), ON_UPDATE(fix_slave_net_timeout)); static bool check_slave_skip_counter(sys_var *self, THD *thd, set_var *var) { bool result= false; mysql_mutex_lock(&LOCK_active_mi); mysql_mutex_lock(&active_mi->rli.run_lock); if (active_mi->rli.slave_running) { my_message(ER_SLAVE_MUST_STOP, ER(ER_SLAVE_MUST_STOP), MYF(0)); result= true; } mysql_mutex_unlock(&active_mi->rli.run_lock); mysql_mutex_unlock(&LOCK_active_mi); return result; } static bool fix_slave_skip_counter(sys_var *self, THD *thd, enum_var_type type) { mysql_mutex_lock(&LOCK_active_mi); mysql_mutex_lock(&active_mi->rli.run_lock); /* The following test should normally never be true as we test this in the check function; To be safe against multiple SQL_SLAVE_SKIP_COUNTER request, we do the check anyway */ if (!active_mi->rli.slave_running) { mysql_mutex_lock(&active_mi->rli.data_lock); active_mi->rli.slave_skip_counter= sql_slave_skip_counter; mysql_mutex_unlock(&active_mi->rli.data_lock); } mysql_mutex_unlock(&active_mi->rli.run_lock); mysql_mutex_unlock(&LOCK_active_mi); return 0; } static Sys_var_uint Sys_slave_skip_counter( "sql_slave_skip_counter", "sql_slave_skip_counter", GLOBAL_VAR(sql_slave_skip_counter), NO_CMD_LINE, VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_slave_skip_counter), ON_UPDATE(fix_slave_skip_counter)); static Sys_var_charptr Sys_slave_skip_errors( "slave_skip_errors", "Tells the slave thread to continue " "replication when a query event returns an error from the " "provided list", READ_ONLY GLOBAL_VAR(opt_slave_skip_errors), CMD_LINE(REQUIRED_ARG), IN_SYSTEM_CHARSET, DEFAULT(0)); static Sys_var_ulonglong Sys_relay_log_space_limit( "relay_log_space_limit", "Maximum space to use for all relay logs", READ_ONLY GLOBAL_VAR(relay_log_space_limit), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(0), BLOCK_SIZE(1)); static Sys_var_uint Sys_sync_relaylog_period( "sync_relay_log", "Synchronously flush relay log to disk after " "every #th event. Use 0 (default) to disable synchronous flushing", GLOBAL_VAR(sync_relaylog_period), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1)); static Sys_var_uint Sys_sync_relayloginfo_period( "sync_relay_log_info", "Synchronously flush relay log info " "to disk after every #th transaction. Use 0 (default) to disable " "synchronous flushing", GLOBAL_VAR(sync_relayloginfo_period), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1)); #endif static Sys_var_uint Sys_sync_binlog_period( "sync_binlog", "Synchronously flush binary log to disk after " "every #th event. Use 0 (default) to disable synchronous flushing", GLOBAL_VAR(sync_binlog_period), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1)); static Sys_var_uint Sys_sync_masterinfo_period( "sync_master_info", "Synchronously flush master info to disk " "after every #th event. Use 0 (default) to disable synchronous flushing", GLOBAL_VAR(sync_masterinfo_period), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, UINT_MAX), DEFAULT(0), BLOCK_SIZE(1)); #ifdef HAVE_REPLICATION static Sys_var_ulong Sys_slave_trans_retries( "slave_transaction_retries", "Number of times the slave SQL " "thread will retry a transaction in case it failed with a deadlock " "or elapsed lock wait timeout, before giving up and stopping", GLOBAL_VAR(slave_trans_retries), CMD_LINE(REQUIRED_ARG), VALID_RANGE(0, ULONG_MAX), DEFAULT(10), BLOCK_SIZE(1)); #endif static bool check_locale(sys_var *self, THD *thd, set_var *var) { if (!var->value) return false; MY_LOCALE *locale; char buff[STRING_BUFFER_USUAL_SIZE]; if (var->value->result_type() == INT_RESULT) { int lcno= (int)var->value->val_int(); if (!(locale= my_locale_by_number(lcno))) { my_error(ER_UNKNOWN_LOCALE, MYF(0), llstr(lcno, buff)); return true; } if (check_not_null(self, thd, var)) return true; } else // STRING_RESULT { String str(buff, sizeof(buff), system_charset_info), *res; if (!(res=var->value->val_str(&str))) return true; else if (!(locale= my_locale_by_name(res->c_ptr()))) { ErrConvString err(res); my_error(ER_UNKNOWN_LOCALE, MYF(0), err.ptr()); return true; } } var->save_result.ptr= locale; if (!locale->errmsgs->errmsgs) { mysql_mutex_lock(&LOCK_error_messages); if (!locale->errmsgs->errmsgs && read_texts(ERRMSG_FILE, locale->errmsgs->language, &locale->errmsgs->errmsgs, ER_ERROR_LAST - ER_ERROR_FIRST + 1)) { push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN, ER_UNKNOWN_ERROR, "Can't process error message file for locale '%s'", locale->name); mysql_mutex_unlock(&LOCK_error_messages); return true; } mysql_mutex_unlock(&LOCK_error_messages); } return false; } static Sys_var_struct Sys_lc_messages( "lc_messages", "Set the language used for the error messages", SESSION_VAR(lc_messages), NO_CMD_LINE, offsetof(MY_LOCALE, name), DEFAULT(&my_default_lc_messages), NO_MUTEX_GUARD, NOT_IN_BINLOG, ON_CHECK(check_locale)); static Sys_var_struct Sys_lc_time_names( "lc_time_names", "Set the language used for the month " "names and the days of the week", SESSION_VAR(lc_time_names), NO_CMD_LINE, offsetof(MY_LOCALE, name), DEFAULT(&my_default_lc_time_names), NO_MUTEX_GUARD, IN_BINLOG, ON_CHECK(check_locale)); static Sys_var_tz Sys_time_zone( "time_zone", "time_zone", SESSION_VAR(time_zone), NO_CMD_LINE, DEFAULT(&default_tz), NO_MUTEX_GUARD, IN_BINLOG);