diff options
Diffstat (limited to 'sql/set_var.cc')
| -rw-r--r-- | sql/set_var.cc | 149 |
1 files changed, 117 insertions, 32 deletions
diff --git a/sql/set_var.cc b/sql/set_var.cc index 5dd438ba95a..04c80576887 100644 --- a/sql/set_var.cc +++ b/sql/set_var.cc @@ -2,8 +2,7 @@ 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; either version 2 of the License, or - (at your option) any later version. + 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 @@ -81,7 +80,8 @@ extern my_bool innobase_log_archive, innobase_use_doublewrite, innobase_use_checksums, innobase_file_per_table, - innobase_locks_unsafe_for_binlog; + innobase_locks_unsafe_for_binlog, + innobase_rollback_on_timeout; extern "C" { extern ulong srv_max_buf_pool_modified_pct; @@ -119,9 +119,6 @@ TYPELIB delay_key_write_typelib= delay_key_write_type_names, NULL }; -static int sys_check_charset(THD *thd, set_var *var); -static bool sys_update_charset(THD *thd, set_var *var); -static void sys_set_default_charset(THD *thd, enum_var_type type); static int sys_check_ftb_syntax(THD *thd, set_var *var); static bool sys_update_ftb_syntax(THD *thd, set_var * var); static void sys_default_ftb_syntax(THD *thd, enum_var_type type); @@ -392,7 +389,7 @@ sys_var_thd_ulong sys_preload_buff_size("preload_buffer_size", &SV::preload_buff_size); sys_var_thd_ulong sys_read_buff_size("read_buffer_size", &SV::read_buff_size); -sys_var_bool_ptr sys_readonly("read_only", &opt_readonly); +sys_var_opt_readonly sys_readonly("read_only", &opt_readonly); sys_var_thd_ulong sys_read_rnd_buff_size("read_rnd_buffer_size", &SV::read_rnd_buff_size); sys_var_thd_ulong sys_div_precincrement("div_precision_increment", @@ -422,6 +419,10 @@ sys_var_thd_ulong sys_trans_alloc_block_size("transaction_alloc_block_size", sys_var_thd_ulong sys_trans_prealloc_size("transaction_prealloc_size", &SV::trans_prealloc_size, 0, fix_trans_mem_root); +sys_var_thd_enum sys_thread_handling("thread_handling", + &SV::thread_handling, + &thread_handling_typelib, + NULL); #ifdef HAVE_QUERY_CACHE sys_var_long_ptr sys_query_cache_limit("query_cache_limit", @@ -490,6 +491,10 @@ sys_var_long_ptr sys_table_lock_wait_timeout("table_lock_wait_timeout", &table_lock_wait_timeout); sys_var_long_ptr sys_thread_cache_size("thread_cache_size", &thread_cache_size); +#if HAVE_POOL_OF_THREADS == 1 +sys_var_long_ptr sys_thread_pool_size("thread_pool_size", + &thread_pool_size); +#endif sys_var_thd_enum sys_tx_isolation("tx_isolation", &SV::tx_isolation, &tx_isolation_typelib, @@ -694,7 +699,6 @@ sys_var_have_variable sys_have_query_cache("have_query_cache", &have_query_cache); sys_var_have_variable sys_have_rtree_keys("have_rtree_keys", &have_rtree_keys); sys_var_have_variable sys_have_symlink("have_symlink", &have_symlink); -sys_var_have_variable sys_have_row_based_replication("have_row_based_replication",&have_row_based_replication); /* Global read-only variable describing server license */ sys_var_const_str sys_license("license", STRINGIFY_ARG(LICENSE)); @@ -817,7 +821,6 @@ SHOW_VAR init_vars[]= { {sys_have_openssl.name, (char*) &have_openssl, SHOW_HAVE}, {sys_have_partition_db.name,(char*) &have_partition_db, SHOW_HAVE}, {sys_have_query_cache.name, (char*) &have_query_cache, SHOW_HAVE}, - {sys_have_row_based_replication.name, (char*) &have_row_based_replication, SHOW_HAVE}, {sys_have_rtree_keys.name, (char*) &have_rtree_keys, SHOW_HAVE}, {sys_have_symlink.name, (char*) &have_symlink, SHOW_HAVE}, {"init_connect", (char*) &sys_init_connect, SHOW_SYS}, @@ -850,6 +853,7 @@ SHOW_VAR init_vars[]= { {sys_innodb_max_purge_lag.name, (char*) &sys_innodb_max_purge_lag, SHOW_SYS}, {"innodb_mirrored_log_groups", (char*) &innobase_mirrored_log_groups, SHOW_LONG}, {"innodb_open_files", (char*) &innobase_open_files, SHOW_LONG }, + {"innodb_rollback_on_timeout", (char*) &innobase_rollback_on_timeout, SHOW_MY_BOOL}, {sys_innodb_support_xa.name, (char*) &sys_innodb_support_xa, SHOW_SYS}, {sys_innodb_sync_spin_loops.name, (char*) &sys_innodb_sync_spin_loops, SHOW_SYS}, {sys_innodb_table_locks.name, (char*) &sys_innodb_table_locks, SHOW_SYS}, @@ -1051,6 +1055,10 @@ SHOW_VAR init_vars[]= { #ifdef HAVE_THR_SETCONCURRENCY {"thread_concurrency", (char*) &concurrency, SHOW_LONG}, #endif + {sys_thread_handling.name, (char*) &sys_thread_handling, SHOW_SYS}, +#if HAVE_POOL_OF_THREADS == 1 + {sys_thread_pool_size.name, (char*) &sys_thread_pool_size, SHOW_SYS}, +#endif {"thread_stack", (char*) &my_thread_stack_size, SHOW_LONG}, {sys_time_format.name, (char*) &sys_time_format, SHOW_SYS}, {"time_zone", (char*) &sys_time_zone, SHOW_SYS}, @@ -1272,14 +1280,14 @@ static int check_completion_type(THD *thd, set_var *var) static void fix_net_read_timeout(THD *thd, enum_var_type type) { if (type != OPT_GLOBAL) - thd->net.read_timeout=thd->variables.net_read_timeout; + net_set_read_timeout(&thd->net, thd->variables.net_read_timeout); } static void fix_net_write_timeout(THD *thd, enum_var_type type) { if (type != OPT_GLOBAL) - thd->net.write_timeout=thd->variables.net_write_timeout; + net_set_write_timeout(&thd->net, thd->variables.net_write_timeout); } static void fix_net_retry_count(THD *thd, enum_var_type type) @@ -1356,10 +1364,6 @@ bool sys_var_thd_binlog_format::is_readonly() const If we don't have row-based replication compiled in, the variable is always read-only. */ -#ifndef HAVE_ROW_BASED_REPLICATION - my_error(ER_RBR_NOT_AVAILABLE, MYF(0)); - return 1; -#else if ((thd->variables.binlog_format == BINLOG_FORMAT_ROW) && thd->temporary_tables) { @@ -1384,16 +1388,13 @@ bool sys_var_thd_binlog_format::is_readonly() const return 1; } #endif /* HAVE_NDB_BINLOG */ -#endif /* HAVE_ROW_BASED_REPLICATION */ return sys_var_thd_enum::is_readonly(); } void fix_binlog_format_after_update(THD *thd, enum_var_type type) { -#ifdef HAVE_ROW_BASED_REPLICATION thd->reset_current_stmt_binlog_row_based(); -#endif /*HAVE_ROW_BASED_REPLICATION*/ } @@ -1472,9 +1473,9 @@ static void fix_server_id(THD *thd, enum_var_type type) sys_var_long_ptr:: -sys_var_long_ptr(const char *name_arg, ulong *value_ptr, +sys_var_long_ptr(const char *name_arg, ulong *value_ptr_arg, sys_after_update_func after_update_arg) - :sys_var_long_ptr_global(name_arg, value_ptr, + :sys_var_long_ptr_global(name_arg, value_ptr_arg, &LOCK_global_system_variables, after_update_arg) {} @@ -1824,7 +1825,7 @@ Item *sys_var::item(THD *thd, enum_var_type var_type, LEX_STRING *base) /* As there was no local variable, return the global value */ var_type= OPT_GLOBAL; } - switch (type()) { + switch (show_type()) { case SHOW_INT: { uint value; @@ -2730,7 +2731,7 @@ bool update_sys_var_str_path(THD *thd, sys_var_str *var_str, file_log= logger.get_log_file_handler(); break; default: - DBUG_ASSERT(0); + assert(0); // Impossible } if (!old_value) @@ -3117,17 +3118,39 @@ byte *sys_var_max_user_conn::value_ptr(THD *thd, enum_var_type type, return (byte*) &(max_user_connections); } + bool sys_var_thd_lc_time_names::check(THD *thd, set_var *var) { - char *locale_str =var->value->str_value.c_ptr(); - MY_LOCALE *locale_match= my_locale_by_name(locale_str); + MY_LOCALE *locale_match; - if (locale_match == NULL) + if (var->value->result_type() == INT_RESULT) { - my_printf_error(ER_UNKNOWN_ERROR, - "Unknown locale: '%s'", MYF(0), locale_str); - return 1; + if (!(locale_match= my_locale_by_number((uint) var->value->val_int()))) + { + char buf[20]; + int10_to_str((int) var->value->val_int(), buf, -10); + my_printf_error(ER_UNKNOWN_ERROR, "Unknown locale: '%s'", MYF(0), buf); + return 1; + } } + else // STRING_RESULT + { + char buff[6]; + String str(buff, sizeof(buff), &my_charset_latin1), *res; + if (!(res=var->value->val_str(&str))) + { + my_error(ER_WRONG_VALUE_FOR_VAR, MYF(0), name, "NULL"); + return 1; + } + const char *locale_str= res->c_ptr(); + if (!(locale_match= my_locale_by_name(locale_str))) + { + my_printf_error(ER_UNKNOWN_ERROR, + "Unknown locale: '%s'", MYF(0), locale_str); + return 1; + } + } + var->save_result.locale_value= locale_match; return 0; } @@ -3747,7 +3770,7 @@ bool sys_var_thd_table_type::update(THD *thd, set_var *var) */ byte *sys_var_thd_sql_mode::symbolic_mode_representation(THD *thd, - ulong val, + ulonglong val, ulong *len) { char buff[256]; @@ -4062,6 +4085,70 @@ bool sys_var_trust_routine_creators::update(THD *thd, set_var *var) return sys_var_bool_ptr::update(thd, var); } +bool sys_var_opt_readonly::update(THD *thd, set_var *var) +{ + bool result; + + DBUG_ENTER("sys_var_opt_readonly::update"); + + /* Prevent self dead-lock */ + if (thd->locked_tables || thd->active_transaction()) + { + my_error(ER_LOCK_OR_ACTIVE_TRANSACTION, MYF(0)); + DBUG_RETURN(true); + } + + 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 + */ + result= sys_var_bool_ptr::update(thd, var); + DBUG_RETURN(result); + } + + /* + 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. + */ + + if (lock_global_read_lock(thd)) + DBUG_RETURN(true); + + /* + 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, true, NULL, false)) + 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 */ + result= sys_var_bool_ptr::update(thd, var); + +end_with_read_lock: + /* Release the lock */ + unlock_global_read_lock(thd); + DBUG_RETURN(result); +} + + /* even session variable here requires SUPER, because of -#o,file */ bool sys_var_thd_dbug::check(THD *thd, set_var *var) { @@ -4127,15 +4214,13 @@ sys_var_event_scheduler::update(THD *thd, set_var *var) DBUG_PRINT("info", ("new_value: %d", (int) var->save_result.ulong_value)); - Item_result var_type= var->value->result_type(); - if (var->save_result.ulong_value == Events::EVENTS_ON) res= Events::get_instance()->start_execution_of_events(); else if (var->save_result.ulong_value == Events::EVENTS_OFF) res= Events::get_instance()->stop_execution_of_events(); else { - DBUG_ASSERT(0); + assert(0); // Impossible } if (res) my_error(ER_EVENT_SET_VAR_ERROR, MYF(0)); |