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mariadb/sql/set_var.cc
unknown 68d7b26698 Fix for bug #4508 "CONVERT_TZ() function with new time zone as param crashes server". 
Instead of trying to open time zone tables during calculation of CONVERT_TZ() function
or setting of @@time_zone variable we should open and lock them with the rest of 
statement's table (so we should add them to global table list) and after that use such 
pre-opened tables for loading info about time zones.


mysql-test/r/timezone2.result:
  Added test for bug #4508
mysql-test/t/timezone2.test:
  Added test for bug #4508
scripts/mysql_create_system_tables.sh:
  Added one more test time zone to time zone tables which is needed for test for bug #4508.
sql/item_create.cc:
  CONVERT_TZ() now is treated as special function.
sql/item_create.h:
  CONVERT_TZ() now is treated as special function.
sql/item_timefunc.cc:
  Item_func_convert_tz now uses list of pre-opened time zone tables instead of trying to
  open them ad-hoc. Also it avoid calling of current_thd.
sql/item_timefunc.h:
  Added comment describing special nature of CONVERT_TZ() function.
  Optimization: Added own fix_fields() method and tz_tables member for caching pointer
  to list of open time zone tables to Item_func_convert_tz class.
sql/lex.h:
  CONVERT_TZ() now is treated as special function.
sql/mysql_priv.h:
  Removed function which is no longer used.
sql/set_var.cc:
  Now my_tz_find() accepts list of pre-opened time zone tables as last argument 
  and no longer needs pointer to current THD.
sql/set_var.h:
  Exported sys_time_zone, which is now used in sql_yacc.yy for quick finding out if we are
  setting @@time_zone variable.
sql/sql_base.cc:
  Moved propagation of pointers to open tables from global list to local select lists to
  open_and_lock_tables(), also added implicit usage of time zone tables as condition for
  such propagation.
sql/sql_lex.cc:
  Added fake_time_zone_tables_list which is used to indicate that time zone tables are
  implicitly used in statement.
  st_select_lex_unit::create_total_list(): if time zone tables are implicitly used in
  statement add them to global tables list.
sql/sql_lex.h:
  Added LEX::time_zone_tables_used member which is used to indicate that time zone tables 
  are implicitly used in this statement (by pointing to fake_time_zone_table_list) and 
  for holding pointer to those tables after they've been opened.
sql/sql_parse.cc:
  We should also create global table list if statement uses time zone tables implicitly.
  Added initialization of LEX::time_zone_tables_used to mysql_query_init().
sql/sql_prepare.cc:
  We should also create global table list if statement uses time zone tables implicitly.
sql/sql_select.cc:
  Removed functions which are no longer used.
sql/sql_yacc.yy:
  CONVERT_TZ() and @@time_zone variable are handled in special way since they implicitly 
  use time zone tables.
sql/tztime.cc:
  Fix for bug #4508 "CONVERT_TZ() function with new time zone as param crashes server".
  If statement uses CONVERT_TZ() function or @@time_zone variable is set then it implicitly
  uses time zone tables. We need to open and lock such tables with all other tables of 
  such statement.
  
  All code responsible for opening table was removed from tz_load_from_db() and function was 
  renamed to tz_load_from_open_tables() (which uses list of pre-opened tables).
  We also have new functions for construction and initialization of table list of time
  zone tables.
  my_tz_find() now always require list of pre-opened time zone tables and no longer needs
  current THD. So we have to pre-open them in my_tz_init().
  Also now we try to open time zone tables only if they were found during startup.
sql/tztime.h:
  New function for construction of table list of time zone tables my_tz_get_table_list().
  Now my_tz_find() requires list of pre-pened time zone tables instead of current thread.
2004-08-10 12:42:31 +04:00

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/* Copyright (C) 2000-2003 MySQL AB
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.
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 */
/*
Handling of MySQL SQL variables
To add a new variable, one has to do the following:
- Use one of the 'sys_var... classes from set_var.h or write a specific
one for the variable type.
- Define it in the 'variable definition list' in this file.
- If the variable should be changeable or one should be able to access it
with @@variable_name, it should be added to the 'list of all variables'
list (sys_variables) in this file.
- If the variable is thread specific, add it to 'system_variables' struct.
If not, add it to mysqld.cc and an declaration in 'mysql_priv.h'
- If the variable should be changed from the command line, add a definition
of it in the my_option structure list in mysqld.dcc
- Don't forget to initialize new fields in global_system_variables and
max_system_variables!
- If the variable should show up in 'show variables' add it to the
init_vars[] struct in this file
TODO:
- Add full support for the variable character_set (for 4.1)
- 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.
*/
#ifdef __GNUC__
#pragma implementation // gcc: Class implementation
#endif
#include "mysql_priv.h"
#include <mysql.h>
#include "slave.h"
#include "sql_acl.h"
#include <my_getopt.h>
#include <thr_alarm.h>
#include <myisam.h>
#ifdef HAVE_BERKELEY_DB
#include "ha_berkeley.h"
#endif
#ifdef HAVE_INNOBASE_DB
#include "ha_innodb.h"
#endif
#ifdef HAVE_NDBCLUSTER_DB
#include "ha_ndbcluster.h"
#endif
static HASH system_variable_hash;
const char *bool_type_names[]= { "OFF", "ON", NullS };
TYPELIB bool_typelib=
{
array_elements(bool_type_names)-1, "", bool_type_names
};
const char *delay_key_write_type_names[]= { "OFF", "ON", "ALL", NullS };
TYPELIB delay_key_write_typelib=
{
array_elements(delay_key_write_type_names)-1, "", delay_key_write_type_names
};
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);
static bool sys_update_init_connect(THD*, set_var*);
static void sys_default_init_connect(THD*, enum_var_type type);
static bool sys_update_init_slave(THD*, set_var*);
static void sys_default_init_slave(THD*, enum_var_type type);
static bool set_option_bit(THD *thd, set_var *var);
static bool set_option_autocommit(THD *thd, set_var *var);
static int check_log_update(THD *thd, set_var *var);
static bool set_log_update(THD *thd, set_var *var);
static int check_pseudo_thread_id(THD *thd, set_var *var);
static void fix_low_priority_updates(THD *thd, enum_var_type type);
static void fix_tx_isolation(THD *thd, enum_var_type type);
static void fix_net_read_timeout(THD *thd, enum_var_type type);
static void fix_net_write_timeout(THD *thd, enum_var_type type);
static void fix_net_retry_count(THD *thd, enum_var_type type);
static void fix_max_join_size(THD *thd, enum_var_type type);
static void fix_query_cache_size(THD *thd, enum_var_type type);
static void fix_query_cache_min_res_unit(THD *thd, enum_var_type type);
static void fix_myisam_max_extra_sort_file_size(THD *thd, enum_var_type type);
static void fix_myisam_max_sort_file_size(THD *thd, enum_var_type type);
static void fix_max_binlog_size(THD *thd, enum_var_type type);
static void fix_max_relay_log_size(THD *thd, enum_var_type type);
static void fix_max_connections(THD *thd, enum_var_type type);
static int check_max_delayed_threads(THD *thd, set_var *var);
static void fix_thd_mem_root(THD *thd, enum_var_type type);
static void fix_trans_mem_root(THD *thd, enum_var_type type);
static void fix_server_id(THD *thd, enum_var_type type);
static KEY_CACHE *create_key_cache(const char *name, uint length);
void fix_sql_mode_var(THD *thd, enum_var_type type);
static byte *get_error_count(THD *thd);
static byte *get_warning_count(THD *thd);
/*
Variable definition list
These are variables that can be set from the command line, in
alphabetic order
*/
sys_var_long_ptr sys_binlog_cache_size("binlog_cache_size",
&binlog_cache_size);
sys_var_thd_ulong sys_bulk_insert_buff_size("bulk_insert_buffer_size",
&SV::bulk_insert_buff_size);
sys_var_character_set_server sys_character_set_server("character_set_server");
sys_var_str sys_charset_system("character_set_system",
sys_check_charset,
sys_update_charset,
sys_set_default_charset,
(char *)my_charset_utf8_general_ci.name);
sys_var_character_set_database sys_character_set_database("character_set_database");
sys_var_character_set_client sys_character_set_client("character_set_client");
sys_var_character_set_connection sys_character_set_connection("character_set_connection");
sys_var_character_set_results sys_character_set_results("character_set_results");
sys_var_collation_connection sys_collation_connection("collation_connection");
sys_var_collation_database sys_collation_database("collation_database");
sys_var_collation_server sys_collation_server("collation_server");
sys_var_bool_ptr sys_concurrent_insert("concurrent_insert",
&myisam_concurrent_insert);
sys_var_long_ptr sys_connect_timeout("connect_timeout",
&connect_timeout);
sys_var_enum sys_delay_key_write("delay_key_write",
&delay_key_write_options,
&delay_key_write_typelib,
fix_delay_key_write);
sys_var_long_ptr sys_delayed_insert_limit("delayed_insert_limit",
&delayed_insert_limit);
sys_var_long_ptr sys_delayed_insert_timeout("delayed_insert_timeout",
&delayed_insert_timeout);
sys_var_long_ptr sys_delayed_queue_size("delayed_queue_size",
&delayed_queue_size);
sys_var_long_ptr sys_expire_logs_days("expire_logs_days",
&expire_logs_days);
sys_var_bool_ptr sys_flush("flush", &myisam_flush);
sys_var_long_ptr sys_flush_time("flush_time", &flush_time);
sys_var_str sys_ft_boolean_syntax("ft_boolean_syntax",
sys_check_ftb_syntax,
sys_update_ftb_syntax,
sys_default_ftb_syntax,
ft_boolean_syntax);
sys_var_str sys_init_connect("init_connect", 0,
sys_update_init_connect,
sys_default_init_connect,0);
sys_var_str sys_init_slave("init_slave", 0,
sys_update_init_slave,
sys_default_init_slave,0);
sys_var_thd_ulong sys_interactive_timeout("interactive_timeout",
&SV::net_interactive_timeout);
sys_var_thd_ulong sys_join_buffer_size("join_buffer_size",
&SV::join_buff_size);
sys_var_key_buffer_size sys_key_buffer_size("key_buffer_size");
sys_var_key_cache_long sys_key_cache_block_size("key_cache_block_size",
offsetof(KEY_CACHE,
param_block_size));
sys_var_key_cache_long sys_key_cache_division_limit("key_cache_division_limit",
offsetof(KEY_CACHE,
param_division_limit));
sys_var_key_cache_long sys_key_cache_age_threshold("key_cache_age_threshold",
offsetof(KEY_CACHE,
param_age_threshold));
sys_var_bool_ptr sys_local_infile("local_infile",
&opt_local_infile);
sys_var_thd_ulong sys_log_warnings("log_warnings", &SV::log_warnings);
sys_var_thd_ulong sys_long_query_time("long_query_time",
&SV::long_query_time);
sys_var_thd_bool sys_low_priority_updates("low_priority_updates",
&SV::low_priority_updates,
fix_low_priority_updates);
#ifndef TO_BE_DELETED /* Alias for the low_priority_updates */
sys_var_thd_bool sys_sql_low_priority_updates("sql_low_priority_updates",
&SV::low_priority_updates,
fix_low_priority_updates);
#endif
sys_var_thd_ulong sys_max_allowed_packet("max_allowed_packet",
&SV::max_allowed_packet);
sys_var_long_ptr sys_max_binlog_cache_size("max_binlog_cache_size",
&max_binlog_cache_size);
sys_var_long_ptr sys_max_binlog_size("max_binlog_size",
&max_binlog_size,
fix_max_binlog_size);
sys_var_long_ptr sys_max_connections("max_connections",
&max_connections,
fix_max_connections);
sys_var_long_ptr sys_max_connect_errors("max_connect_errors",
&max_connect_errors);
sys_var_thd_ulong sys_max_insert_delayed_threads("max_insert_delayed_threads",
&SV::max_insert_delayed_threads,
check_max_delayed_threads,
fix_max_connections);
sys_var_thd_ulong sys_max_delayed_threads("max_delayed_threads",
&SV::max_insert_delayed_threads,
check_max_delayed_threads,
fix_max_connections);
sys_var_thd_ulong sys_max_error_count("max_error_count",
&SV::max_error_count);
sys_var_thd_ulong sys_max_heap_table_size("max_heap_table_size",
&SV::max_heap_table_size);
sys_var_thd_ulong sys_pseudo_thread_id("pseudo_thread_id",
&SV::pseudo_thread_id,
check_pseudo_thread_id, 0);
sys_var_thd_ha_rows sys_max_join_size("max_join_size",
&SV::max_join_size,
fix_max_join_size);
sys_var_thd_ulong sys_max_seeks_for_key("max_seeks_for_key",
&SV::max_seeks_for_key);
sys_var_thd_ulong sys_max_length_for_sort_data("max_length_for_sort_data",
&SV::max_length_for_sort_data);
#ifndef TO_BE_DELETED /* Alias for max_join_size */
sys_var_thd_ha_rows sys_sql_max_join_size("sql_max_join_size",
&SV::max_join_size,
fix_max_join_size);
#endif
sys_var_long_ptr sys_max_relay_log_size("max_relay_log_size",
&max_relay_log_size,
fix_max_relay_log_size);
sys_var_thd_ulong sys_max_sort_length("max_sort_length",
&SV::max_sort_length);
sys_var_long_ptr sys_max_user_connections("max_user_connections",
&max_user_connections);
sys_var_thd_ulong sys_max_tmp_tables("max_tmp_tables",
&SV::max_tmp_tables);
sys_var_long_ptr sys_max_write_lock_count("max_write_lock_count",
&max_write_lock_count);
sys_var_long_ptr sys_myisam_data_pointer_size("myisam_data_pointer_size",
&myisam_data_pointer_size);
sys_var_thd_ulonglong sys_myisam_max_extra_sort_file_size("myisam_max_extra_sort_file_size", &SV::myisam_max_extra_sort_file_size, fix_myisam_max_extra_sort_file_size, 1);
sys_var_thd_ulonglong sys_myisam_max_sort_file_size("myisam_max_sort_file_size", &SV::myisam_max_sort_file_size, fix_myisam_max_sort_file_size, 1);
sys_var_thd_ulong sys_myisam_repair_threads("myisam_repair_threads", &SV::myisam_repair_threads);
sys_var_thd_ulong sys_myisam_sort_buffer_size("myisam_sort_buffer_size", &SV::myisam_sort_buff_size);
sys_var_thd_ulong sys_net_buffer_length("net_buffer_length",
&SV::net_buffer_length);
sys_var_thd_ulong sys_net_read_timeout("net_read_timeout",
&SV::net_read_timeout,
0, fix_net_read_timeout);
sys_var_thd_ulong sys_net_write_timeout("net_write_timeout",
&SV::net_write_timeout,
0, fix_net_write_timeout);
sys_var_thd_ulong sys_net_retry_count("net_retry_count",
&SV::net_retry_count,
0, fix_net_retry_count);
sys_var_thd_bool sys_new_mode("new", &SV::new_mode);
sys_var_thd_bool sys_old_passwords("old_passwords", &SV::old_passwords);
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_thd_ulong sys_read_rnd_buff_size("read_rnd_buffer_size",
&SV::read_rnd_buff_size);
#ifdef HAVE_REPLICATION
sys_var_bool_ptr sys_relay_log_purge("relay_log_purge",
&relay_log_purge);
#endif
sys_var_long_ptr sys_rpl_recovery_rank("rpl_recovery_rank",
&rpl_recovery_rank);
sys_var_long_ptr sys_query_cache_size("query_cache_size",
&query_cache_size,
fix_query_cache_size);
sys_var_thd_ulong sys_range_alloc_block_size("range_alloc_block_size",
&SV::range_alloc_block_size);
sys_var_thd_ulong sys_query_alloc_block_size("query_alloc_block_size",
&SV::query_alloc_block_size,
0, fix_thd_mem_root);
sys_var_thd_ulong sys_query_prealloc_size("query_prealloc_size",
&SV::query_prealloc_size,
0, fix_thd_mem_root);
sys_var_thd_ulong sys_trans_alloc_block_size("transaction_alloc_block_size",
&SV::trans_alloc_block_size,
0, fix_trans_mem_root);
sys_var_thd_ulong sys_trans_prealloc_size("transaction_prealloc_size",
&SV::trans_prealloc_size,
0, fix_trans_mem_root);
#ifdef HAVE_QUERY_CACHE
sys_var_long_ptr sys_query_cache_limit("query_cache_limit",
&query_cache.query_cache_limit);
sys_var_long_ptr sys_query_cache_min_res_unit("query_cache_min_res_unit",
&query_cache_min_res_unit,
fix_query_cache_min_res_unit);
sys_var_thd_enum sys_query_cache_type("query_cache_type",
&SV::query_cache_type,
&query_cache_type_typelib);
sys_var_thd_bool
sys_query_cache_wlock_invalidate("query_cache_wlock_invalidate",
&SV::query_cache_wlock_invalidate);
#endif /* HAVE_QUERY_CACHE */
sys_var_bool_ptr sys_secure_auth("secure_auth", &opt_secure_auth);
sys_var_long_ptr sys_server_id("server_id", &server_id, fix_server_id);
sys_var_bool_ptr sys_slave_compressed_protocol("slave_compressed_protocol",
&opt_slave_compressed_protocol);
#ifdef HAVE_REPLICATION
sys_var_long_ptr sys_slave_net_timeout("slave_net_timeout",
&slave_net_timeout);
#endif
sys_var_long_ptr sys_slow_launch_time("slow_launch_time",
&slow_launch_time);
sys_var_thd_ulong sys_sort_buffer("sort_buffer_size",
&SV::sortbuff_size);
sys_var_thd_sql_mode sys_sql_mode("sql_mode",
&SV::sql_mode);
sys_var_thd_table_type sys_table_type("table_type",
&SV::table_type);
sys_var_thd_storage_engine sys_storage_engine("storage_engine",
&SV::table_type);
#ifdef HAVE_REPLICATION
sys_var_sync_binlog_period sys_sync_binlog_period("sync_binlog", &sync_binlog_period);
#endif
sys_var_bool_ptr sys_sync_frm("sync_frm", &opt_sync_frm);
sys_var_long_ptr sys_table_cache_size("table_cache",
&table_cache_size);
sys_var_long_ptr sys_thread_cache_size("thread_cache_size",
&thread_cache_size);
sys_var_thd_enum sys_tx_isolation("tx_isolation",
&SV::tx_isolation,
&tx_isolation_typelib,
fix_tx_isolation);
sys_var_thd_ulong sys_tmp_table_size("tmp_table_size",
&SV::tmp_table_size);
sys_var_thd_ulong sys_net_wait_timeout("wait_timeout",
&SV::net_wait_timeout);
#ifdef HAVE_INNOBASE_DB
sys_var_long_ptr sys_innodb_max_dirty_pages_pct("innodb_max_dirty_pages_pct",
&srv_max_buf_pool_modified_pct);
#endif
/* Time/date/datetime formats */
sys_var_thd_date_time_format sys_time_format("time_format",
&SV::time_format,
MYSQL_TIMESTAMP_TIME);
sys_var_thd_date_time_format sys_date_format("date_format",
&SV::date_format,
MYSQL_TIMESTAMP_DATE);
sys_var_thd_date_time_format sys_datetime_format("datetime_format",
&SV::datetime_format,
MYSQL_TIMESTAMP_DATETIME);
/* Variables that are bits in THD */
static sys_var_thd_bit sys_autocommit("autocommit", 0,
set_option_autocommit,
OPTION_NOT_AUTOCOMMIT,
1);
static sys_var_thd_bit sys_big_tables("big_tables", 0,
set_option_bit,
OPTION_BIG_TABLES);
#ifndef TO_BE_DELETED /* Alias for big_tables */
static sys_var_thd_bit sys_sql_big_tables("sql_big_tables", 0,
set_option_bit,
OPTION_BIG_TABLES);
#endif
static sys_var_thd_bit sys_big_selects("sql_big_selects", 0,
set_option_bit,
OPTION_BIG_SELECTS);
static sys_var_thd_bit sys_log_off("sql_log_off", 0,
set_option_bit,
OPTION_LOG_OFF);
static sys_var_thd_bit sys_log_update("sql_log_update",
check_log_update,
set_log_update,
OPTION_UPDATE_LOG);
static sys_var_thd_bit sys_log_binlog("sql_log_bin",
check_log_update,
set_log_update,
OPTION_BIN_LOG);
static sys_var_thd_bit sys_sql_warnings("sql_warnings", 0,
set_option_bit,
OPTION_WARNINGS);
static sys_var_thd_bit sys_auto_is_null("sql_auto_is_null", 0,
set_option_bit,
OPTION_AUTO_IS_NULL);
static sys_var_thd_bit sys_safe_updates("sql_safe_updates", 0,
set_option_bit,
OPTION_SAFE_UPDATES);
static sys_var_thd_bit sys_buffer_results("sql_buffer_result", 0,
set_option_bit,
OPTION_BUFFER_RESULT);
static sys_var_thd_bit sys_quote_show_create("sql_quote_show_create", 0,
set_option_bit,
OPTION_QUOTE_SHOW_CREATE);
static sys_var_thd_bit sys_foreign_key_checks("foreign_key_checks", 0,
set_option_bit,
OPTION_NO_FOREIGN_KEY_CHECKS,
1);
static sys_var_thd_bit sys_unique_checks("unique_checks", 0,
set_option_bit,
OPTION_RELAXED_UNIQUE_CHECKS,
1);
/* Local state variables */
static sys_var_thd_ha_rows sys_select_limit("sql_select_limit",
&SV::select_limit);
static sys_var_timestamp sys_timestamp("timestamp");
static sys_var_last_insert_id sys_last_insert_id("last_insert_id");
static sys_var_last_insert_id sys_identity("identity");
static sys_var_insert_id sys_insert_id("insert_id");
static sys_var_readonly sys_error_count("error_count",
OPT_SESSION,
SHOW_LONG,
get_error_count);
static sys_var_readonly sys_warning_count("warning_count",
OPT_SESSION,
SHOW_LONG,
get_warning_count);
/* alias for last_insert_id() to be compatible with Sybase */
#ifdef HAVE_REPLICATION
static sys_var_slave_skip_counter sys_slave_skip_counter("sql_slave_skip_counter");
#endif
static sys_var_rand_seed1 sys_rand_seed1("rand_seed1");
static sys_var_rand_seed2 sys_rand_seed2("rand_seed2");
static sys_var_thd_ulong sys_default_week_format("default_week_format",
&SV::default_week_format);
sys_var_thd_ulong sys_group_concat_max_len("group_concat_max_len",
&SV::group_concat_max_len);
sys_var_thd_time_zone sys_time_zone("time_zone");
/* Read only variables */
sys_var_const_str sys_os("version_compile_os", SYSTEM_TYPE);
/* Global read-only variable describing server license */
sys_var_const_str sys_license("license", STRINGIFY_ARG(LICENSE));
/*
List of all variables for initialisation and storage in hash
This is sorted in alphabetical order to make it easy to add new variables
If the variable is not in this list, it can't be changed with
SET variable_name=
*/
sys_var *sys_variables[]=
{
&sys_auto_is_null,
&sys_autocommit,
&sys_big_tables,
&sys_big_selects,
&sys_binlog_cache_size,
&sys_buffer_results,
&sys_bulk_insert_buff_size,
&sys_character_set_server,
&sys_character_set_database,
&sys_character_set_client,
&sys_character_set_connection,
&sys_character_set_results,
&sys_collation_connection,
&sys_collation_database,
&sys_collation_server,
&sys_concurrent_insert,
&sys_connect_timeout,
&sys_date_format,
&sys_datetime_format,
&sys_default_week_format,
&sys_delay_key_write,
&sys_delayed_insert_limit,
&sys_delayed_insert_timeout,
&sys_delayed_queue_size,
&sys_error_count,
&sys_expire_logs_days,
&sys_flush,
&sys_flush_time,
&sys_ft_boolean_syntax,
&sys_foreign_key_checks,
&sys_group_concat_max_len,
&sys_identity,
&sys_init_connect,
&sys_init_slave,
&sys_insert_id,
&sys_interactive_timeout,
&sys_join_buffer_size,
&sys_key_buffer_size,
&sys_key_cache_block_size,
&sys_key_cache_division_limit,
&sys_key_cache_age_threshold,
&sys_last_insert_id,
&sys_license,
&sys_local_infile,
&sys_log_binlog,
&sys_log_off,
&sys_log_update,
&sys_log_warnings,
&sys_long_query_time,
&sys_low_priority_updates,
&sys_max_allowed_packet,
&sys_max_binlog_cache_size,
&sys_max_binlog_size,
&sys_max_connect_errors,
&sys_max_connections,
&sys_max_delayed_threads,
&sys_max_error_count,
&sys_max_insert_delayed_threads,
&sys_max_heap_table_size,
&sys_max_join_size,
&sys_max_length_for_sort_data,
&sys_max_relay_log_size,
&sys_max_seeks_for_key,
&sys_max_sort_length,
&sys_max_tmp_tables,
&sys_max_user_connections,
&sys_max_write_lock_count,
&sys_myisam_data_pointer_size,
&sys_myisam_max_extra_sort_file_size,
&sys_myisam_max_sort_file_size,
&sys_myisam_repair_threads,
&sys_myisam_sort_buffer_size,
&sys_net_buffer_length,
&sys_net_read_timeout,
&sys_net_retry_count,
&sys_net_wait_timeout,
&sys_net_write_timeout,
&sys_new_mode,
&sys_old_passwords,
&sys_preload_buff_size,
&sys_pseudo_thread_id,
&sys_query_alloc_block_size,
&sys_query_cache_size,
&sys_query_prealloc_size,
#ifdef HAVE_QUERY_CACHE
&sys_query_cache_limit,
&sys_query_cache_min_res_unit,
&sys_query_cache_type,
&sys_query_cache_wlock_invalidate,
#endif /* HAVE_QUERY_CACHE */
&sys_quote_show_create,
&sys_rand_seed1,
&sys_rand_seed2,
&sys_range_alloc_block_size,
&sys_readonly,
&sys_read_buff_size,
&sys_read_rnd_buff_size,
#ifdef HAVE_REPLICATION
&sys_relay_log_purge,
#endif
&sys_rpl_recovery_rank,
&sys_safe_updates,
&sys_secure_auth,
&sys_select_limit,
&sys_server_id,
#ifdef HAVE_REPLICATION
&sys_slave_compressed_protocol,
&sys_slave_net_timeout,
&sys_slave_skip_counter,
#endif
&sys_slow_launch_time,
&sys_sort_buffer,
&sys_sql_big_tables,
&sys_sql_low_priority_updates,
&sys_sql_max_join_size,
&sys_sql_mode,
&sys_sql_warnings,
&sys_storage_engine,
#ifdef HAVE_REPLICATION
&sys_sync_binlog_period,
#endif
&sys_sync_frm,
&sys_table_cache_size,
&sys_table_type,
&sys_thread_cache_size,
&sys_time_format,
&sys_timestamp,
&sys_time_zone,
&sys_tmp_table_size,
&sys_trans_alloc_block_size,
&sys_trans_prealloc_size,
&sys_tx_isolation,
&sys_os,
#ifdef HAVE_INNOBASE_DB
&sys_innodb_max_dirty_pages_pct,
#endif
&sys_unique_checks,
&sys_warning_count
};
/*
Variables shown by SHOW variables in alphabetical order
*/
struct show_var_st init_vars[]= {
{"back_log", (char*) &back_log, SHOW_LONG},
{"basedir", mysql_home, SHOW_CHAR},
#ifdef HAVE_BERKELEY_DB
{"bdb_cache_size", (char*) &berkeley_cache_size, SHOW_LONG},
{"bdb_home", (char*) &berkeley_home, SHOW_CHAR_PTR},
{"bdb_log_buffer_size", (char*) &berkeley_log_buffer_size, SHOW_LONG},
{"bdb_logdir", (char*) &berkeley_logdir, SHOW_CHAR_PTR},
{"bdb_max_lock", (char*) &berkeley_max_lock, SHOW_LONG},
{"bdb_shared_data", (char*) &berkeley_shared_data, SHOW_BOOL},
{"bdb_tmpdir", (char*) &berkeley_tmpdir, SHOW_CHAR_PTR},
#endif
{sys_binlog_cache_size.name,(char*) &sys_binlog_cache_size, SHOW_SYS},
{sys_bulk_insert_buff_size.name,(char*) &sys_bulk_insert_buff_size,SHOW_SYS},
{sys_character_set_client.name,(char*) &sys_character_set_client, SHOW_SYS},
{sys_character_set_connection.name,(char*) &sys_character_set_connection,SHOW_SYS},
{sys_character_set_database.name, (char*) &sys_character_set_database,SHOW_SYS},
{sys_character_set_results.name,(char*) &sys_character_set_results, SHOW_SYS},
{sys_character_set_server.name, (char*) &sys_character_set_server,SHOW_SYS},
{sys_charset_system.name, (char*) &sys_charset_system, SHOW_SYS},
{"character_sets_dir", mysql_charsets_dir, SHOW_CHAR},
{sys_collation_connection.name,(char*) &sys_collation_connection, SHOW_SYS},
{sys_collation_database.name,(char*) &sys_collation_database, SHOW_SYS},
{sys_collation_server.name,(char*) &sys_collation_server, SHOW_SYS},
{sys_concurrent_insert.name,(char*) &sys_concurrent_insert, SHOW_SYS},
{sys_connect_timeout.name, (char*) &sys_connect_timeout, SHOW_SYS},
{"datadir", mysql_real_data_home, SHOW_CHAR},
{sys_date_format.name, (char*) &sys_date_format, SHOW_SYS},
{sys_datetime_format.name, (char*) &sys_datetime_format, SHOW_SYS},
{sys_default_week_format.name, (char*) &sys_default_week_format, SHOW_SYS},
{sys_delay_key_write.name, (char*) &sys_delay_key_write, SHOW_SYS},
{sys_delayed_insert_limit.name, (char*) &sys_delayed_insert_limit,SHOW_SYS},
{sys_delayed_insert_timeout.name, (char*) &sys_delayed_insert_timeout, SHOW_SYS},
{sys_delayed_queue_size.name,(char*) &sys_delayed_queue_size, SHOW_SYS},
{sys_expire_logs_days.name, (char*) &sys_expire_logs_days, SHOW_SYS},
{sys_flush.name, (char*) &sys_flush, SHOW_SYS},
{sys_flush_time.name, (char*) &sys_flush_time, SHOW_SYS},
{sys_ft_boolean_syntax.name,(char*) &ft_boolean_syntax, SHOW_CHAR},
{"ft_max_word_len", (char*) &ft_max_word_len, SHOW_LONG},
{"ft_min_word_len", (char*) &ft_min_word_len, SHOW_LONG},
{"ft_query_expansion_limit",(char*) &ft_query_expansion_limit, SHOW_LONG},
{"ft_stopword_file", (char*) &ft_stopword_file, SHOW_CHAR_PTR},
{sys_group_concat_max_len.name, (char*) &sys_group_concat_max_len, SHOW_SYS},
{"have_archive", (char*) &have_archive_db, SHOW_HAVE},
{"have_bdb", (char*) &have_berkeley_db, SHOW_HAVE},
{"have_compress", (char*) &have_compress, SHOW_HAVE},
{"have_crypt", (char*) &have_crypt, SHOW_HAVE},
{"have_geometry", (char*) &have_geometry, SHOW_HAVE},
{"have_innodb", (char*) &have_innodb, SHOW_HAVE},
{"have_isam", (char*) &have_isam, SHOW_HAVE},
{"have_ndbcluster", (char*) &have_ndbcluster, SHOW_HAVE},
{"have_openssl", (char*) &have_openssl, SHOW_HAVE},
{"have_query_cache", (char*) &have_query_cache, SHOW_HAVE},
{"have_raid", (char*) &have_raid, SHOW_HAVE},
{"have_rtree_keys", (char*) &have_rtree_keys, SHOW_HAVE},
{"have_symlink", (char*) &have_symlink, SHOW_HAVE},
{"init_connect", (char*) &sys_init_connect, SHOW_SYS},
{"init_file", (char*) &opt_init_file, SHOW_CHAR_PTR},
{"init_slave", (char*) &sys_init_slave, SHOW_SYS},
#ifdef HAVE_INNOBASE_DB
{"innodb_additional_mem_pool_size", (char*) &innobase_additional_mem_pool_size, SHOW_LONG },
{"innodb_buffer_pool_awe_mem_mb", (char*) &innobase_buffer_pool_awe_mem_mb, SHOW_LONG },
{"innodb_buffer_pool_size", (char*) &innobase_buffer_pool_size, SHOW_LONG },
{"innodb_data_file_path", (char*) &innobase_data_file_path, SHOW_CHAR_PTR},
{"innodb_data_home_dir", (char*) &innobase_data_home_dir, SHOW_CHAR_PTR},
{"innodb_fast_shutdown", (char*) &innobase_fast_shutdown, SHOW_MY_BOOL},
{"innodb_file_io_threads", (char*) &innobase_file_io_threads, SHOW_LONG },
{"innodb_file_per_table", (char*) &innobase_file_per_table, SHOW_MY_BOOL},
{"innodb_locks_unsafe_for_binlog", (char*) &innobase_locks_unsafe_for_binlog, SHOW_MY_BOOL},
{"innodb_flush_log_at_trx_commit", (char*) &innobase_flush_log_at_trx_commit, SHOW_INT},
{"innodb_flush_method", (char*) &innobase_unix_file_flush_method, SHOW_CHAR_PTR},
{"innodb_force_recovery", (char*) &innobase_force_recovery, SHOW_LONG },
{"innodb_lock_wait_timeout", (char*) &innobase_lock_wait_timeout, SHOW_LONG },
{"innodb_log_arch_dir", (char*) &innobase_log_arch_dir, SHOW_CHAR_PTR},
{"innodb_log_archive", (char*) &innobase_log_archive, SHOW_MY_BOOL},
{"innodb_log_buffer_size", (char*) &innobase_log_buffer_size, SHOW_LONG },
{"innodb_log_file_size", (char*) &innobase_log_file_size, SHOW_LONG},
{"innodb_log_files_in_group", (char*) &innobase_log_files_in_group, SHOW_LONG},
{"innodb_log_group_home_dir", (char*) &innobase_log_group_home_dir, SHOW_CHAR_PTR},
{sys_innodb_max_dirty_pages_pct.name, (char*) &sys_innodb_max_dirty_pages_pct, SHOW_SYS},
{"innodb_mirrored_log_groups", (char*) &innobase_mirrored_log_groups, SHOW_LONG},
{"innodb_open_files", (char*) &innobase_open_files, SHOW_LONG },
{"innodb_thread_concurrency", (char*) &innobase_thread_concurrency, SHOW_LONG },
#endif
{sys_interactive_timeout.name,(char*) &sys_interactive_timeout, SHOW_SYS},
{sys_join_buffer_size.name, (char*) &sys_join_buffer_size, SHOW_SYS},
{sys_key_buffer_size.name, (char*) &sys_key_buffer_size, SHOW_SYS},
{sys_key_cache_age_threshold.name, (char*) &sys_key_cache_age_threshold,
SHOW_SYS},
{sys_key_cache_block_size.name, (char*) &sys_key_cache_block_size,
SHOW_SYS},
{sys_key_cache_division_limit.name, (char*) &sys_key_cache_division_limit,
SHOW_SYS},
{"language", language, SHOW_CHAR},
{"large_files_support", (char*) &opt_large_files, SHOW_BOOL},
{sys_license.name, (char*) &sys_license, SHOW_SYS},
{sys_local_infile.name, (char*) &sys_local_infile, SHOW_SYS},
#ifdef HAVE_MLOCKALL
{"locked_in_memory", (char*) &locked_in_memory, SHOW_BOOL},
#endif
{"log", (char*) &opt_log, SHOW_BOOL},
{"log_bin", (char*) &opt_bin_log, SHOW_BOOL},
{"log_error", (char*) log_error_file, SHOW_CHAR},
#ifdef HAVE_REPLICATION
{"log_slave_updates", (char*) &opt_log_slave_updates, SHOW_MY_BOOL},
#endif
{"log_slow_queries", (char*) &opt_slow_log, SHOW_BOOL},
{"log_update", (char*) &opt_update_log, SHOW_BOOL},
{sys_log_warnings.name, (char*) &sys_log_warnings, SHOW_SYS},
{sys_long_query_time.name, (char*) &sys_long_query_time, SHOW_SYS},
{sys_low_priority_updates.name, (char*) &sys_low_priority_updates, SHOW_SYS},
{"lower_case_file_system", (char*) &lower_case_file_system, SHOW_MY_BOOL},
{"lower_case_table_names", (char*) &lower_case_table_names, SHOW_INT},
{sys_max_allowed_packet.name,(char*) &sys_max_allowed_packet, SHOW_SYS},
{sys_max_binlog_cache_size.name,(char*) &sys_max_binlog_cache_size, SHOW_SYS},
{sys_max_binlog_size.name, (char*) &sys_max_binlog_size, SHOW_SYS},
{sys_max_connect_errors.name, (char*) &sys_max_connect_errors, SHOW_SYS},
{sys_max_connections.name, (char*) &sys_max_connections, SHOW_SYS},
{sys_max_delayed_threads.name,(char*) &sys_max_delayed_threads, SHOW_SYS},
{sys_max_error_count.name, (char*) &sys_max_error_count, SHOW_SYS},
{sys_max_heap_table_size.name,(char*) &sys_max_heap_table_size, SHOW_SYS},
{sys_max_insert_delayed_threads.name,
(char*) &sys_max_insert_delayed_threads, SHOW_SYS},
{sys_max_join_size.name, (char*) &sys_max_join_size, SHOW_SYS},
{sys_max_length_for_sort_data.name, (char*) &sys_max_length_for_sort_data,
SHOW_SYS},
{sys_max_relay_log_size.name, (char*) &sys_max_relay_log_size, SHOW_SYS},
{sys_max_seeks_for_key.name, (char*) &sys_max_seeks_for_key, SHOW_SYS},
{sys_max_sort_length.name, (char*) &sys_max_sort_length, SHOW_SYS},
{sys_max_tmp_tables.name, (char*) &sys_max_tmp_tables, SHOW_SYS},
{sys_max_user_connections.name,(char*) &sys_max_user_connections, SHOW_SYS},
{sys_max_write_lock_count.name, (char*) &sys_max_write_lock_count,SHOW_SYS},
{sys_myisam_data_pointer_size.name, (char*) &sys_myisam_data_pointer_size, SHOW_SYS},
{sys_myisam_max_extra_sort_file_size.name,
(char*) &sys_myisam_max_extra_sort_file_size,
SHOW_SYS},
{sys_myisam_max_sort_file_size.name, (char*) &sys_myisam_max_sort_file_size,
SHOW_SYS},
{"myisam_recover_options", (char*) &myisam_recover_options_str, SHOW_CHAR_PTR},
{sys_myisam_repair_threads.name, (char*) &sys_myisam_repair_threads,
SHOW_SYS},
{sys_myisam_sort_buffer_size.name, (char*) &sys_myisam_sort_buffer_size, SHOW_SYS},
#ifdef __NT__
{"named_pipe", (char*) &opt_enable_named_pipe, SHOW_MY_BOOL},
#endif
{sys_net_buffer_length.name,(char*) &sys_net_buffer_length, SHOW_SYS},
{sys_net_read_timeout.name, (char*) &sys_net_read_timeout, SHOW_SYS},
{sys_net_retry_count.name, (char*) &sys_net_retry_count, SHOW_SYS},
{sys_net_write_timeout.name,(char*) &sys_net_write_timeout, SHOW_SYS},
{sys_new_mode.name, (char*) &sys_new_mode, SHOW_SYS},
{sys_old_passwords.name, (char*) &sys_old_passwords, SHOW_SYS},
{"open_files_limit", (char*) &open_files_limit, SHOW_LONG},
{"pid_file", (char*) pidfile_name, SHOW_CHAR},
{"port", (char*) &mysqld_port, SHOW_INT},
{sys_preload_buff_size.name, (char*) &sys_preload_buff_size, SHOW_SYS},
{"protocol_version", (char*) &protocol_version, SHOW_INT},
{sys_query_alloc_block_size.name, (char*) &sys_query_alloc_block_size,
SHOW_SYS},
#ifdef HAVE_QUERY_CACHE
{sys_query_cache_limit.name,(char*) &sys_query_cache_limit, SHOW_SYS},
{sys_query_cache_min_res_unit.name, (char*) &sys_query_cache_min_res_unit,
SHOW_SYS},
{sys_query_cache_size.name, (char*) &sys_query_cache_size, SHOW_SYS},
{sys_query_cache_type.name, (char*) &sys_query_cache_type, SHOW_SYS},
#endif /* HAVE_QUERY_CACHE */
{sys_query_prealloc_size.name, (char*) &sys_query_prealloc_size, SHOW_SYS},
{sys_range_alloc_block_size.name, (char*) &sys_range_alloc_block_size,
SHOW_SYS},
{sys_read_buff_size.name, (char*) &sys_read_buff_size, SHOW_SYS},
{sys_readonly.name, (char*) &sys_readonly, SHOW_SYS},
{sys_read_rnd_buff_size.name,(char*) &sys_read_rnd_buff_size, SHOW_SYS},
#ifdef HAVE_REPLICATION
{sys_relay_log_purge.name, (char*) &sys_relay_log_purge, SHOW_SYS},
#endif
{sys_rpl_recovery_rank.name,(char*) &sys_rpl_recovery_rank, SHOW_SYS},
{"secure_auth", (char*) &sys_secure_auth, SHOW_SYS},
#ifdef HAVE_SMEM
{"shared_memory", (char*) &opt_enable_shared_memory, SHOW_MY_BOOL},
{"shared_memory_base_name", (char*) &shared_memory_base_name, SHOW_CHAR_PTR},
#endif
{sys_server_id.name, (char*) &sys_server_id, SHOW_SYS},
{"skip_external_locking", (char*) &my_disable_locking, SHOW_MY_BOOL},
{"skip_networking", (char*) &opt_disable_networking, SHOW_BOOL},
{"skip_show_database", (char*) &opt_skip_show_db, SHOW_BOOL},
#ifdef HAVE_REPLICATION
{sys_slave_net_timeout.name,(char*) &sys_slave_net_timeout, SHOW_SYS},
#endif
{sys_slow_launch_time.name, (char*) &sys_slow_launch_time, SHOW_SYS},
#ifdef HAVE_SYS_UN_H
{"socket", (char*) &mysqld_unix_port, SHOW_CHAR_PTR},
#endif
{sys_sort_buffer.name, (char*) &sys_sort_buffer, SHOW_SYS},
{sys_sql_mode.name, (char*) &sys_sql_mode, SHOW_SYS},
{sys_storage_engine.name, (char*) &sys_storage_engine, SHOW_SYS},
#ifdef HAVE_REPLICATION
{sys_sync_binlog_period.name,(char*) &sys_sync_binlog_period, SHOW_SYS},
#endif
{sys_sync_frm.name, (char*) &sys_sync_frm, SHOW_SYS},
#ifdef HAVE_TZNAME
{"system_time_zone", system_time_zone, SHOW_CHAR},
#endif
{"table_cache", (char*) &table_cache_size, SHOW_LONG},
{sys_table_type.name, (char*) &sys_table_type, SHOW_SYS},
{sys_thread_cache_size.name,(char*) &sys_thread_cache_size, SHOW_SYS},
#ifdef HAVE_THR_SETCONCURRENCY
{"thread_concurrency", (char*) &concurrency, SHOW_LONG},
#endif
{"thread_stack", (char*) &thread_stack, SHOW_LONG},
{sys_time_format.name, (char*) &sys_time_format, SHOW_SYS},
{"time_zone", (char*) &sys_time_zone, SHOW_SYS},
{sys_tmp_table_size.name, (char*) &sys_tmp_table_size, SHOW_SYS},
{"tmpdir", (char*) &opt_mysql_tmpdir, SHOW_CHAR_PTR},
{sys_trans_alloc_block_size.name, (char*) &sys_trans_alloc_block_size,
SHOW_SYS},
{sys_trans_prealloc_size.name, (char*) &sys_trans_prealloc_size, SHOW_SYS},
{sys_tx_isolation.name, (char*) &sys_tx_isolation, SHOW_SYS},
{"version", server_version, SHOW_CHAR},
#ifdef HAVE_BERKELEY_DB
{"version_bdb", (char*) DB_VERSION_STRING, SHOW_CHAR},
#endif
{"version_comment", (char*) MYSQL_COMPILATION_COMMENT, SHOW_CHAR},
{"version_compile_machine", (char*) MACHINE_TYPE, SHOW_CHAR},
{sys_os.name, (char*) &sys_os, SHOW_SYS},
{sys_net_wait_timeout.name, (char*) &sys_net_wait_timeout, SHOW_SYS},
{NullS, NullS, SHOW_LONG}
};
bool sys_var::check(THD *thd, set_var *var)
{
var->save_result.ulonglong_value= var->value->val_int();
return 0;
}
bool sys_var_str::check(THD *thd, set_var *var)
{
int res;
if (!check_func)
return 0;
if ((res=(*check_func)(thd, var)) < 0)
my_error(ER_WRONG_VALUE_FOR_VAR, MYF(0), name,
var->value->str_value.ptr());
return res;
}
/*
Functions to check and update variables
*/
/*
Update variables 'init_connect, init_slave'.
In case of 'DEFAULT' value
(for example: 'set GLOBAL init_connect=DEFAULT')
'var' parameter is NULL pointer.
*/
bool update_sys_var_str(sys_var_str *var_str, rw_lock_t *var_mutex,
set_var *var)
{
char *res= 0, *old_value=(char *)(var ? var->value->str_value.ptr() : 0);
uint new_length= (var ? var->value->str_value.length() : 0);
if (!old_value)
old_value= (char*) "";
if (!(res= my_strdup_with_length((byte*)old_value, new_length, MYF(0))))
return 1;
/*
Replace the old value in such a way that the any thread using
the value will work.
*/
rw_wrlock(var_mutex);
old_value= var_str->value;
var_str->value= res;
var_str->value_length= new_length;
rw_unlock(var_mutex);
my_free(old_value, MYF(MY_ALLOW_ZERO_PTR));
return 0;
}
static bool sys_update_init_connect(THD *thd, set_var *var)
{
return update_sys_var_str(&sys_init_connect, &LOCK_sys_init_connect, var);
}
static void sys_default_init_connect(THD* thd, enum_var_type type)
{
update_sys_var_str(&sys_init_connect, &LOCK_sys_init_connect, 0);
}
static bool sys_update_init_slave(THD *thd, set_var *var)
{
return update_sys_var_str(&sys_init_slave, &LOCK_sys_init_slave, var);
}
static void sys_default_init_slave(THD* thd, enum_var_type type)
{
update_sys_var_str(&sys_init_slave, &LOCK_sys_init_slave, 0);
}
static int sys_check_ftb_syntax(THD *thd, set_var *var)
{
if (thd->master_access & SUPER_ACL)
return ft_boolean_check_syntax_string((byte*) var->value->str_value.c_ptr()) ?
-1 : 0;
else
{
my_error(ER_SPECIFIC_ACCESS_DENIED_ERROR, MYF(0), "SUPER");
return 1;
}
}
static bool sys_update_ftb_syntax(THD *thd, set_var * var)
{
strmake(ft_boolean_syntax, var->value->str_value.c_ptr(),
sizeof(ft_boolean_syntax)-1);
return 0;
}
static void sys_default_ftb_syntax(THD *thd, enum_var_type type)
{
strmake(ft_boolean_syntax, def_ft_boolean_syntax,
sizeof(ft_boolean_syntax)-1);
}
/*
The following 3 functions need to be changed in 4.1 when we allow
one to change character sets
*/
static int sys_check_charset(THD *thd, set_var *var)
{
return 0;
}
static bool sys_update_charset(THD *thd, set_var *var)
{
return 0;
}
static void sys_set_default_charset(THD *thd, enum_var_type type)
{
}
/*
If one sets the LOW_PRIORIY UPDATES flag, we also must change the
used lock type
*/
static void fix_low_priority_updates(THD *thd, enum_var_type type)
{
if (type != OPT_GLOBAL)
thd->update_lock_default= (thd->variables.low_priority_updates ?
TL_WRITE_LOW_PRIORITY : TL_WRITE);
}
static void
fix_myisam_max_extra_sort_file_size(THD *thd, enum_var_type type)
{
myisam_max_extra_temp_length=
(my_off_t) global_system_variables.myisam_max_extra_sort_file_size;
}
static void
fix_myisam_max_sort_file_size(THD *thd, enum_var_type type)
{
myisam_max_temp_length=
(my_off_t) global_system_variables.myisam_max_sort_file_size;
}
/*
Set the OPTION_BIG_SELECTS flag if max_join_size == HA_POS_ERROR
*/
static void fix_max_join_size(THD *thd, enum_var_type type)
{
if (type != OPT_GLOBAL)
{
if (thd->variables.max_join_size == HA_POS_ERROR)
thd->options|= OPTION_BIG_SELECTS;
else
thd->options&= ~OPTION_BIG_SELECTS;
}
}
/*
If one doesn't use the SESSION modifier, the isolation level
is only active for the next command
*/
static void fix_tx_isolation(THD *thd, enum_var_type type)
{
if (type == OPT_SESSION)
thd->session_tx_isolation= ((enum_tx_isolation)
thd->variables.tx_isolation);
}
/*
If we are changing the thread variable, we have to copy it to NET too
*/
#ifdef HAVE_REPLICATION
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;
}
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;
}
static void fix_net_retry_count(THD *thd, enum_var_type type)
{
if (type != OPT_GLOBAL)
thd->net.retry_count=thd->variables.net_retry_count;
}
#else /* HAVE_REPLICATION */
static void fix_net_read_timeout(THD *thd __attribute__(unused),
enum_var_type type __attribute__(unused))
{}
static void fix_net_write_timeout(THD *thd __attribute__(unused),
enum_var_type type __attribute__(unused))
{}
static void fix_net_retry_count(THD *thd __attribute__(unused),
enum_var_type type __attribute__(unused))
{}
#endif /* HAVE_REPLICATION */
static void fix_query_cache_size(THD *thd, enum_var_type type)
{
#ifdef HAVE_QUERY_CACHE
ulong requested= query_cache_size;
query_cache.resize(query_cache_size);
if (requested != query_cache_size)
push_warning_printf(current_thd, MYSQL_ERROR::WARN_LEVEL_WARN,
ER_WARN_QC_RESIZE, ER(ER_WARN_QC_RESIZE),
requested, query_cache_size);
#endif
}
#ifdef HAVE_QUERY_CACHE
static void fix_query_cache_min_res_unit(THD *thd, enum_var_type type)
{
query_cache_min_res_unit=
query_cache.set_min_res_unit(query_cache_min_res_unit);
}
#endif
extern void fix_delay_key_write(THD *thd, enum_var_type type)
{
switch ((enum_delay_key_write) 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;
}
}
static void fix_max_binlog_size(THD *thd, enum_var_type type)
{
DBUG_ENTER("fix_max_binlog_size");
DBUG_PRINT("info",("max_binlog_size=%lu max_relay_log_size=%lu",
max_binlog_size, max_relay_log_size));
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
DBUG_VOID_RETURN;
}
static void fix_max_relay_log_size(THD *thd, enum_var_type type)
{
DBUG_ENTER("fix_max_relay_log_size");
DBUG_PRINT("info",("max_binlog_size=%lu max_relay_log_size=%lu",
max_binlog_size, max_relay_log_size));
#ifdef HAVE_REPLICATION
active_mi->rli.relay_log.set_max_size(max_relay_log_size ?
max_relay_log_size: max_binlog_size);
#endif
DBUG_VOID_RETURN;
}
static int check_max_delayed_threads(THD *thd, set_var *var)
{
longlong val= var->value->val_int();
if (var->type != OPT_GLOBAL && val != 0 &&
val != (longlong) global_system_variables.max_insert_delayed_threads)
{
char buf[64];
my_error(ER_WRONG_VALUE_FOR_VAR, MYF(0), var->var->name, llstr(val, buf));
return 1;
}
return 0;
}
static void fix_max_connections(THD *thd, enum_var_type type)
{
resize_thr_alarm(max_connections +
global_system_variables.max_insert_delayed_threads + 10);
}
static void fix_thd_mem_root(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);
}
static void fix_trans_mem_root(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);
}
static void fix_server_id(THD *thd, enum_var_type type)
{
server_id_supplied = 1;
}
bool sys_var_long_ptr::update(THD *thd, set_var *var)
{
ulonglong tmp= var->save_result.ulonglong_value;
pthread_mutex_lock(&LOCK_global_system_variables);
if (option_limits)
*value= (ulong) getopt_ull_limit_value(tmp, option_limits);
else
*value= (ulong) tmp;
pthread_mutex_unlock(&LOCK_global_system_variables);
return 0;
}
void sys_var_long_ptr::set_default(THD *thd, enum_var_type type)
{
*value= (ulong) option_limits->def_value;
}
bool sys_var_ulonglong_ptr::update(THD *thd, set_var *var)
{
ulonglong tmp= var->save_result.ulonglong_value;
pthread_mutex_lock(&LOCK_global_system_variables);
if (option_limits)
*value= (ulonglong) getopt_ull_limit_value(tmp, option_limits);
else
*value= (ulonglong) tmp;
pthread_mutex_unlock(&LOCK_global_system_variables);
return 0;
}
void sys_var_ulonglong_ptr::set_default(THD *thd, enum_var_type type)
{
pthread_mutex_lock(&LOCK_global_system_variables);
*value= (ulonglong) option_limits->def_value;
pthread_mutex_unlock(&LOCK_global_system_variables);
}
bool sys_var_bool_ptr::update(THD *thd, set_var *var)
{
*value= (my_bool) var->save_result.ulong_value;
return 0;
}
void sys_var_bool_ptr::set_default(THD *thd, enum_var_type type)
{
*value= (my_bool) option_limits->def_value;
}
bool sys_var_enum::update(THD *thd, set_var *var)
{
*value= (uint) var->save_result.ulong_value;
return 0;
}
byte *sys_var_enum::value_ptr(THD *thd, enum_var_type type, LEX_STRING *base)
{
return (byte*) enum_names->type_names[*value];
}
bool sys_var_thd_ulong::check(THD *thd, set_var *var)
{
return (sys_var_thd::check(thd, var) ||
(check_func && (*check_func)(thd, var)));
}
bool sys_var_thd_ulong::update(THD *thd, set_var *var)
{
ulonglong tmp= var->save_result.ulonglong_value;
/* Don't use bigger value than given with --maximum-variable-name=.. */
if ((ulong) tmp > max_system_variables.*offset)
tmp= max_system_variables.*offset;
if (option_limits)
tmp= (ulong) getopt_ull_limit_value(tmp, option_limits);
if (var->type == OPT_GLOBAL)
global_system_variables.*offset= (ulong) tmp;
else
thd->variables.*offset= (ulong) tmp;
return 0;
}
void sys_var_thd_ulong::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
{
/* We will not come here if option_limits is not set */
global_system_variables.*offset= (ulong) option_limits->def_value;
}
else
thd->variables.*offset= global_system_variables.*offset;
}
byte *sys_var_thd_ulong::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
if (type == OPT_GLOBAL)
return (byte*) &(global_system_variables.*offset);
return (byte*) &(thd->variables.*offset);
}
bool sys_var_thd_ha_rows::update(THD *thd, set_var *var)
{
ulonglong tmp= var->save_result.ulonglong_value;
/* Don't use bigger value than given with --maximum-variable-name=.. */
if ((ha_rows) tmp > max_system_variables.*offset)
tmp= max_system_variables.*offset;
if (option_limits)
tmp= (ha_rows) getopt_ull_limit_value(tmp, option_limits);
if (var->type == OPT_GLOBAL)
{
/* Lock is needed to make things safe on 32 bit systems */
pthread_mutex_lock(&LOCK_global_system_variables);
global_system_variables.*offset= (ha_rows) tmp;
pthread_mutex_unlock(&LOCK_global_system_variables);
}
else
thd->variables.*offset= (ha_rows) tmp;
return 0;
}
void sys_var_thd_ha_rows::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
{
/* We will not come here if option_limits is not set */
pthread_mutex_lock(&LOCK_global_system_variables);
global_system_variables.*offset= (ha_rows) option_limits->def_value;
pthread_mutex_unlock(&LOCK_global_system_variables);
}
else
thd->variables.*offset= global_system_variables.*offset;
}
byte *sys_var_thd_ha_rows::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
if (type == OPT_GLOBAL)
return (byte*) &(global_system_variables.*offset);
return (byte*) &(thd->variables.*offset);
}
bool sys_var_thd_ulonglong::update(THD *thd, set_var *var)
{
ulonglong tmp= var->save_result.ulonglong_value;
if (tmp > max_system_variables.*offset)
tmp= max_system_variables.*offset;
if (option_limits)
tmp= getopt_ull_limit_value(tmp, option_limits);
if (var->type == OPT_GLOBAL)
{
/* Lock is needed to make things safe on 32 bit systems */
pthread_mutex_lock(&LOCK_global_system_variables);
global_system_variables.*offset= (ulonglong) tmp;
pthread_mutex_unlock(&LOCK_global_system_variables);
}
else
thd->variables.*offset= (ulonglong) tmp;
return 0;
}
void sys_var_thd_ulonglong::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
{
pthread_mutex_lock(&LOCK_global_system_variables);
global_system_variables.*offset= (ulonglong) option_limits->def_value;
pthread_mutex_unlock(&LOCK_global_system_variables);
}
else
thd->variables.*offset= global_system_variables.*offset;
}
byte *sys_var_thd_ulonglong::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
if (type == OPT_GLOBAL)
return (byte*) &(global_system_variables.*offset);
return (byte*) &(thd->variables.*offset);
}
bool sys_var_thd_bool::update(THD *thd, set_var *var)
{
if (var->type == OPT_GLOBAL)
global_system_variables.*offset= (my_bool) var->save_result.ulong_value;
else
thd->variables.*offset= (my_bool) var->save_result.ulong_value;
return 0;
}
void sys_var_thd_bool::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
global_system_variables.*offset= (my_bool) option_limits->def_value;
else
thd->variables.*offset= global_system_variables.*offset;
}
byte *sys_var_thd_bool::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
if (type == OPT_GLOBAL)
return (byte*) &(global_system_variables.*offset);
return (byte*) &(thd->variables.*offset);
}
bool sys_var::check_enum(THD *thd, set_var *var, TYPELIB *enum_names)
{
char buff[80];
const char *value;
String str(buff, sizeof(buff), system_charset_info), *res;
if (var->value->result_type() == STRING_RESULT)
{
if (!(res=var->value->val_str(&str)) ||
((long) (var->save_result.ulong_value=
(ulong) find_type(enum_names, res->ptr(),
res->length(),1)-1)) < 0)
{
value= res ? res->c_ptr() : "NULL";
goto err;
}
}
else
{
ulonglong tmp=var->value->val_int();
if (tmp >= enum_names->count)
{
llstr(tmp,buff);
value=buff; // Wrong value is here
goto err;
}
var->save_result.ulong_value= (ulong) tmp; // Save for update
}
return 0;
err:
my_error(ER_WRONG_VALUE_FOR_VAR, MYF(0), name, value);
return 1;
}
bool sys_var::check_set(THD *thd, set_var *var, TYPELIB *enum_names)
{
bool not_used;
char buff[80], *error= 0;
uint error_len= 0;
String str(buff, sizeof(buff), system_charset_info), *res;
if (var->value->result_type() == STRING_RESULT)
{
if (!(res= var->value->val_str(&str)))
goto err;
var->save_result.ulong_value= ((ulong)
find_set(enum_names, res->c_ptr(),
res->length(), &error, &error_len,
&not_used));
if (error_len)
{
strmake(buff, error, min(sizeof(buff), error_len));
goto err;
}
}
else
{
ulonglong tmp= var->value->val_int();
if (tmp >= enum_names->count)
{
llstr(tmp, buff);
goto err;
}
var->save_result.ulong_value= (ulong) tmp; // Save for update
}
return 0;
err:
my_error(ER_WRONG_VALUE_FOR_VAR, MYF(0), name, buff);
return 1;
}
/*
Return an Item for a variable. Used with @@[global.]variable_name
If type is not given, return local value if exists, else global
We have to use netprintf() instead of my_error() here as this is
called on the parsing stage.
TODO:
With prepared statements/stored procedures this has to be fixed
to create an item that gets the current value at fix_fields() stage.
*/
Item *sys_var::item(THD *thd, enum_var_type var_type, LEX_STRING *base)
{
if (check_type(var_type))
{
if (var_type != OPT_DEFAULT)
{
net_printf(thd, ER_INCORRECT_GLOBAL_LOCAL_VAR,
name, var_type == OPT_GLOBAL ? "SESSION" : "GLOBAL");
return 0;
}
/* As there was no local variable, return the global value */
var_type= OPT_GLOBAL;
}
switch (type()) {
case SHOW_LONG:
{
ulong value;
pthread_mutex_lock(&LOCK_global_system_variables);
value= *(ulong*) value_ptr(thd, var_type, base);
pthread_mutex_unlock(&LOCK_global_system_variables);
return new Item_uint((int32) value);
}
case SHOW_LONGLONG:
{
longlong value;
pthread_mutex_lock(&LOCK_global_system_variables);
value= *(longlong*) value_ptr(thd, var_type, base);
pthread_mutex_unlock(&LOCK_global_system_variables);
return new Item_int(value);
}
case SHOW_HA_ROWS:
{
ha_rows value;
pthread_mutex_lock(&LOCK_global_system_variables);
value= *(ha_rows*) value_ptr(thd, var_type, base);
pthread_mutex_unlock(&LOCK_global_system_variables);
return new Item_int((longlong) value);
}
case SHOW_MY_BOOL:
return new Item_int((int32) *(my_bool*) value_ptr(thd, var_type, base),1);
case SHOW_CHAR:
{
Item_string *tmp;
pthread_mutex_lock(&LOCK_global_system_variables);
char *str= (char*) value_ptr(thd, var_type, base);
tmp= new Item_string(str, strlen(str), system_charset_info);
pthread_mutex_unlock(&LOCK_global_system_variables);
return tmp;
}
default:
net_printf(thd, ER_VAR_CANT_BE_READ, name);
}
return 0;
}
bool sys_var_thd_enum::update(THD *thd, set_var *var)
{
if (var->type == OPT_GLOBAL)
global_system_variables.*offset= var->save_result.ulong_value;
else
thd->variables.*offset= var->save_result.ulong_value;
return 0;
}
void sys_var_thd_enum::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
global_system_variables.*offset= (ulong) option_limits->def_value;
else
thd->variables.*offset= global_system_variables.*offset;
}
byte *sys_var_thd_enum::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
ulong tmp= ((type == OPT_GLOBAL) ?
global_system_variables.*offset :
thd->variables.*offset);
return (byte*) enum_names->type_names[tmp];
}
bool sys_var_thd_bit::check(THD *thd, set_var *var)
{
return (check_enum(thd, var, &bool_typelib) ||
(check_func && (*check_func)(thd, var)));
}
bool sys_var_thd_bit::update(THD *thd, set_var *var)
{
int res= (*update_func)(thd, var);
return res;
}
byte *sys_var_thd_bit::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
/*
If reverse is 0 (default) return 1 if bit is set.
If reverse is 1, return 0 if bit is set
*/
thd->sys_var_tmp.my_bool_value= ((thd->options & bit_flag) ?
!reverse : reverse);
return (byte*) &thd->sys_var_tmp.my_bool_value;
}
/* Update a date_time format variable based on given value */
void sys_var_thd_date_time_format::update2(THD *thd, enum_var_type type,
DATE_TIME_FORMAT *new_value)
{
DATE_TIME_FORMAT *old;
DBUG_ENTER("sys_var_date_time_format::update2");
DBUG_DUMP("positions",(char*) new_value->positions,
sizeof(new_value->positions));
if (type == OPT_GLOBAL)
{
pthread_mutex_lock(&LOCK_global_system_variables);
old= (global_system_variables.*offset);
(global_system_variables.*offset)= new_value;
pthread_mutex_unlock(&LOCK_global_system_variables);
}
else
{
old= (thd->variables.*offset);
(thd->variables.*offset)= new_value;
}
my_free((char*) old, MYF(MY_ALLOW_ZERO_PTR));
DBUG_VOID_RETURN;
}
bool sys_var_thd_date_time_format::update(THD *thd, set_var *var)
{
DATE_TIME_FORMAT *new_value;
/* We must make a copy of the last value to get it into normal memory */
new_value= date_time_format_copy((THD*) 0,
var->save_result.date_time_format);
if (!new_value)
return 1; // Out of memory
update2(thd, var->type, new_value); // Can't fail
return 0;
}
bool sys_var_thd_date_time_format::check(THD *thd, set_var *var)
{
char buff[80];
String str(buff,sizeof(buff), system_charset_info), *res;
DATE_TIME_FORMAT *format;
if (!(res=var->value->val_str(&str)))
res= &my_empty_string;
if (!(format= date_time_format_make(date_time_type,
res->ptr(), res->length())))
{
my_error(ER_WRONG_VALUE_FOR_VAR, MYF(0), name, res->c_ptr());
return 1;
}
/*
We must copy result to thread space to not get a memory leak if
update is aborted
*/
var->save_result.date_time_format= date_time_format_copy(thd, format);
my_free((char*) format, MYF(0));
return var->save_result.date_time_format == 0;
}
void sys_var_thd_date_time_format::set_default(THD *thd, enum_var_type type)
{
DATE_TIME_FORMAT *res= 0;
if (type == OPT_GLOBAL)
{
const char *format;
if ((format= opt_date_time_formats[date_time_type]))
res= date_time_format_make(date_time_type, format, strlen(format));
}
else
{
/* Make copy with malloc */
res= date_time_format_copy((THD *) 0, global_system_variables.*offset);
}
if (res) // Should always be true
update2(thd, type, res);
}
byte *sys_var_thd_date_time_format::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
if (type == OPT_GLOBAL)
{
char *res;
/*
We do a copy here just to be sure things will work even if someone
is modifying the original string while the copy is accessed
(Can't happen now in SQL SHOW, but this is a good safety for the future)
*/
res= thd->strmake((global_system_variables.*offset)->format.str,
(global_system_variables.*offset)->format.length);
return (byte*) res;
}
return (byte*) (thd->variables.*offset)->format.str;
}
typedef struct old_names_map_st
{
const char *old_name;
const char *new_name;
} my_old_conv;
static my_old_conv old_conv[]=
{
{ "cp1251_koi8" , "cp1251" },
{ "cp1250_latin2" , "cp1250" },
{ "kam_latin2" , "keybcs2" },
{ "mac_latin2" , "MacRoman" },
{ "macce_latin2" , "MacCE" },
{ "pc2_latin2" , "pclatin2" },
{ "vga_latin2" , "pclatin1" },
{ "koi8_cp1251" , "koi8r" },
{ "win1251ukr_koi8_ukr" , "win1251ukr" },
{ "koi8_ukr_win1251ukr" , "koi8u" },
{ NULL , NULL }
};
CHARSET_INFO *get_old_charset_by_name(const char *name)
{
my_old_conv *conv;
for (conv= old_conv; conv->old_name; conv++)
{
if (!my_strcasecmp(&my_charset_latin1, name, conv->old_name))
return get_charset_by_csname(conv->new_name, MY_CS_PRIMARY, MYF(0));
}
return NULL;
}
bool sys_var_collation::check(THD *thd, set_var *var)
{
CHARSET_INFO *tmp;
if (var->value->result_type() == STRING_RESULT)
{
char buff[80];
String str(buff,sizeof(buff), system_charset_info), *res;
if (!(res=var->value->val_str(&str)))
{
my_error(ER_WRONG_VALUE_FOR_VAR, MYF(0), name, "NULL");
return 1;
}
if (!(tmp=get_charset_by_name(res->c_ptr(),MYF(0))))
{
my_error(ER_UNKNOWN_COLLATION, MYF(0), res->c_ptr());
return 1;
}
}
else // INT_RESULT
{
if (!(tmp=get_charset((int) var->value->val_int(),MYF(0))))
{
char buf[20];
int10_to_str((int) var->value->val_int(), buf, -10);
my_error(ER_UNKNOWN_COLLATION, MYF(0), buf);
return 1;
}
}
var->save_result.charset= tmp; // Save for update
return 0;
}
bool sys_var_character_set::check(THD *thd, set_var *var)
{
CHARSET_INFO *tmp;
if (var->value->result_type() == STRING_RESULT)
{
char buff[80];
String str(buff,sizeof(buff), system_charset_info), *res;
if (!(res=var->value->val_str(&str)))
{
if (!nullable)
{
my_error(ER_WRONG_VALUE_FOR_VAR, MYF(0), name, "NULL");
return 1;
}
tmp= NULL;
}
else if (!(tmp=get_charset_by_csname(res->c_ptr(),MY_CS_PRIMARY,MYF(0))) &&
!(tmp=get_old_charset_by_name(res->c_ptr())))
{
my_error(ER_UNKNOWN_CHARACTER_SET, MYF(0), res->c_ptr());
return 1;
}
}
else // INT_RESULT
{
if (!(tmp=get_charset((int) var->value->val_int(),MYF(0))))
{
char buf[20];
int10_to_str((int) var->value->val_int(), buf, -10);
my_error(ER_UNKNOWN_CHARACTER_SET, MYF(0), buf);
return 1;
}
}
var->save_result.charset= tmp; // Save for update
return 0;
}
bool sys_var_character_set::update(THD *thd, set_var *var)
{
ci_ptr(thd,var->type)[0]= var->save_result.charset;
thd->update_charset();
return 0;
}
byte *sys_var_character_set::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
CHARSET_INFO *cs= ci_ptr(thd,type)[0];
return cs ? (byte*) cs->csname : (byte*) "NULL";
}
CHARSET_INFO ** sys_var_character_set_connection::ci_ptr(THD *thd,
enum_var_type type)
{
if (type == OPT_GLOBAL)
return &global_system_variables.collation_connection;
else
return &thd->variables.collation_connection;
}
void sys_var_character_set_connection::set_default(THD *thd,
enum_var_type type)
{
if (type == OPT_GLOBAL)
global_system_variables.collation_connection= default_charset_info;
else
{
thd->variables.collation_connection= global_system_variables.collation_connection;
thd->update_charset();
}
}
CHARSET_INFO ** sys_var_character_set_client::ci_ptr(THD *thd,
enum_var_type type)
{
if (type == OPT_GLOBAL)
return &global_system_variables.character_set_client;
else
return &thd->variables.character_set_client;
}
void sys_var_character_set_client::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
global_system_variables.character_set_client= default_charset_info;
else
{
thd->variables.character_set_client= (global_system_variables.
character_set_client);
thd->update_charset();
}
}
CHARSET_INFO **
sys_var_character_set_results::ci_ptr(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
return &global_system_variables.character_set_results;
else
return &thd->variables.character_set_results;
}
void sys_var_character_set_results::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
global_system_variables.character_set_results= default_charset_info;
else
{
thd->variables.character_set_results= (global_system_variables.
character_set_results);
thd->update_charset();
}
}
CHARSET_INFO **
sys_var_character_set_server::ci_ptr(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
return &global_system_variables.collation_server;
else
return &thd->variables.collation_server;
}
void sys_var_character_set_server::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
global_system_variables.collation_server= default_charset_info;
else
{
thd->variables.collation_server= global_system_variables.collation_server;
thd->update_charset();
}
}
#if defined(HAVE_REPLICATION) && (MYSQL_VERSION_ID < 50000)
bool sys_var_character_set_server::check(THD *thd, set_var *var)
{
if ((var->type == OPT_GLOBAL) &&
(mysql_bin_log.is_open() ||
active_mi->slave_running || active_mi->rli.slave_running))
{
my_printf_error(0, "Binary logging and replication forbid changing \
the global server character set or collation", MYF(0));
return 1;
}
return sys_var_character_set::check(thd,var);
}
#endif
CHARSET_INFO ** sys_var_character_set_database::ci_ptr(THD *thd,
enum_var_type type)
{
if (type == OPT_GLOBAL)
return &global_system_variables.collation_database;
else
return &thd->variables.collation_database;
}
void sys_var_character_set_database::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
global_system_variables.collation_database= default_charset_info;
else
{
thd->variables.collation_database= thd->db_charset;
thd->update_charset();
}
}
bool sys_var_collation_connection::update(THD *thd, set_var *var)
{
if (var->type == OPT_GLOBAL)
global_system_variables.collation_connection= var->save_result.charset;
else
{
thd->variables.collation_connection= var->save_result.charset;
thd->update_charset();
}
return 0;
}
byte *sys_var_collation_connection::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
CHARSET_INFO *cs= ((type == OPT_GLOBAL) ?
global_system_variables.collation_connection :
thd->variables.collation_connection);
return cs ? (byte*) cs->name : (byte*) "NULL";
}
void sys_var_collation_connection::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
global_system_variables.collation_connection= default_charset_info;
else
{
thd->variables.collation_connection= (global_system_variables.
collation_connection);
thd->update_charset();
}
}
bool sys_var_collation_database::update(THD *thd, set_var *var)
{
if (var->type == OPT_GLOBAL)
global_system_variables.collation_database= var->save_result.charset;
else
{
thd->variables.collation_database= var->save_result.charset;
thd->update_charset();
}
return 0;
}
byte *sys_var_collation_database::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
CHARSET_INFO *cs= ((type == OPT_GLOBAL) ?
global_system_variables.collation_database :
thd->variables.collation_database);
return cs ? (byte*) cs->name : (byte*) "NULL";
}
void sys_var_collation_database::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
global_system_variables.collation_database= default_charset_info;
else
{
thd->variables.collation_database= (global_system_variables.
collation_database);
thd->update_charset();
}
}
#if defined(HAVE_REPLICATION) && (MYSQL_VERSION_ID < 50000)
bool sys_var_collation_server::check(THD *thd, set_var *var)
{
if ((var->type == OPT_GLOBAL) &&
(mysql_bin_log.is_open() ||
active_mi->slave_running || active_mi->rli.slave_running))
{
my_printf_error(0, "Binary logging and replication forbid changing \
the global server character set or collation", MYF(0));
return 1;
}
return sys_var_collation::check(thd,var);
}
#endif
bool sys_var_collation_server::update(THD *thd, set_var *var)
{
if (var->type == OPT_GLOBAL)
global_system_variables.collation_server= var->save_result.charset;
else
{
thd->variables.collation_server= var->save_result.charset;
thd->update_charset();
}
return 0;
}
byte *sys_var_collation_server::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
CHARSET_INFO *cs= ((type == OPT_GLOBAL) ?
global_system_variables.collation_server :
thd->variables.collation_server);
return cs ? (byte*) cs->name : (byte*) "NULL";
}
void sys_var_collation_server::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
global_system_variables.collation_server= default_charset_info;
else
{
thd->variables.collation_server= (global_system_variables.
collation_server);
thd->update_charset();
}
}
LEX_STRING default_key_cache_base= {(char *) "default", 7 };
static KEY_CACHE zero_key_cache;
KEY_CACHE *get_key_cache(LEX_STRING *cache_name)
{
safe_mutex_assert_owner(&LOCK_global_system_variables);
if (!cache_name || ! cache_name->length)
cache_name= &default_key_cache_base;
return ((KEY_CACHE*) find_named(&key_caches,
cache_name->str, cache_name->length, 0));
}
byte *sys_var_key_cache_param::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
KEY_CACHE *key_cache= get_key_cache(base);
if (!key_cache)
key_cache= &zero_key_cache;
return (byte*) key_cache + offset ;
}
bool sys_var_key_buffer_size::update(THD *thd, set_var *var)
{
ulonglong tmp= var->save_result.ulonglong_value;
LEX_STRING *base_name= &var->base;
KEY_CACHE *key_cache;
bool error= 0;
/* If no basename, assume it's for the key cache named 'default' */
if (!base_name->length)
base_name= &default_key_cache_base;
pthread_mutex_lock(&LOCK_global_system_variables);
key_cache= get_key_cache(base_name);
if (!key_cache)
{
/* Key cache didn't exists */
if (!tmp) // Tried to delete cache
goto end; // Ok, nothing to do
if (!(key_cache= create_key_cache(base_name->str, base_name->length)))
{
error= 1;
goto end;
}
}
/*
Abort if some other thread is changing the key cache
TODO: This should be changed so that we wait until the previous
assignment is done and then do the new assign
*/
if (key_cache->in_init)
goto end;
if (!tmp) // Zero size means delete
{
if (key_cache == sql_key_cache)
goto end; // Ignore default key cache
if (key_cache->key_cache_inited) // If initied
{
/*
Move tables using this key cache to the default key cache
and clear the old key cache.
*/
NAMED_LIST *list;
key_cache= (KEY_CACHE *) find_named(&key_caches, base_name->str,
base_name->length, &list);
key_cache->in_init= 1;
pthread_mutex_unlock(&LOCK_global_system_variables);
error= reassign_keycache_tables(thd, key_cache, sql_key_cache);
pthread_mutex_lock(&LOCK_global_system_variables);
key_cache->in_init= 0;
}
/*
We don't delete the key cache as some running threads my still be
in the key cache code with a pointer to the deleted (empty) key cache
*/
goto end;
}
key_cache->param_buff_size=
(ulonglong) getopt_ull_limit_value(tmp, option_limits);
/* If key cache didn't existed initialize it, else resize it */
key_cache->in_init= 1;
pthread_mutex_unlock(&LOCK_global_system_variables);
if (!key_cache->key_cache_inited)
error= (bool) (ha_init_key_cache("", key_cache));
else
error= (bool)(ha_resize_key_cache(key_cache));
pthread_mutex_lock(&LOCK_global_system_variables);
key_cache->in_init= 0;
end:
pthread_mutex_unlock(&LOCK_global_system_variables);
return error;
}
bool sys_var_key_cache_long::update(THD *thd, set_var *var)
{
ulong tmp= (ulong) var->value->val_int();
LEX_STRING *base_name= &var->base;
bool error= 0;
if (!base_name->length)
base_name= &default_key_cache_base;
pthread_mutex_lock(&LOCK_global_system_variables);
KEY_CACHE *key_cache= get_key_cache(base_name);
if (!key_cache && !(key_cache= create_key_cache(base_name->str,
base_name->length)))
{
error= 1;
goto end;
}
/*
Abort if some other thread is changing the key cache
TODO: This should be changed so that we wait until the previous
assignment is done and then do the new assign
*/
if (key_cache->in_init)
goto end;
*((ulong*) (((char*) key_cache) + offset))=
(ulong) getopt_ull_limit_value(tmp, option_limits);
/*
Don't create a new key cache if it didn't exist
(key_caches are created only when the user sets block_size)
*/
key_cache->in_init= 1;
pthread_mutex_unlock(&LOCK_global_system_variables);
error= (bool) (ha_resize_key_cache(key_cache));
pthread_mutex_lock(&LOCK_global_system_variables);
key_cache->in_init= 0;
end:
pthread_mutex_unlock(&LOCK_global_system_variables);
return error;
}
/*****************************************************************************
Functions to handle SET NAMES and SET CHARACTER SET
*****************************************************************************/
int set_var_collation_client::check(THD *thd)
{
return 0;
}
int set_var_collation_client::update(THD *thd)
{
thd->variables.character_set_client= character_set_client;
thd->variables.character_set_results= character_set_results;
thd->variables.collation_connection= collation_connection;
thd->update_charset();
thd->protocol_simple.init(thd);
thd->protocol_prep.init(thd);
return 0;
}
/****************************************************************************/
bool sys_var_timestamp::update(THD *thd, set_var *var)
{
thd->set_time((time_t) var->save_result.ulonglong_value);
return 0;
}
void sys_var_timestamp::set_default(THD *thd, enum_var_type type)
{
thd->user_time=0;
}
byte *sys_var_timestamp::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
thd->sys_var_tmp.long_value= (long) thd->start_time;
return (byte*) &thd->sys_var_tmp.long_value;
}
bool sys_var_last_insert_id::update(THD *thd, set_var *var)
{
thd->insert_id(var->save_result.ulonglong_value);
return 0;
}
byte *sys_var_last_insert_id::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
thd->sys_var_tmp.long_value= (long) thd->insert_id();
return (byte*) &thd->last_insert_id;
}
bool sys_var_insert_id::update(THD *thd, set_var *var)
{
thd->next_insert_id= var->save_result.ulonglong_value;
return 0;
}
byte *sys_var_insert_id::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
return (byte*) &thd->current_insert_id;
}
#ifdef HAVE_REPLICATION
bool sys_var_slave_skip_counter::check(THD *thd, set_var *var)
{
int result= 0;
pthread_mutex_lock(&LOCK_active_mi);
pthread_mutex_lock(&active_mi->rli.run_lock);
if (active_mi->rli.slave_running)
{
my_error(ER_SLAVE_MUST_STOP, MYF(0));
result=1;
}
pthread_mutex_unlock(&active_mi->rli.run_lock);
pthread_mutex_unlock(&LOCK_active_mi);
var->save_result.ulong_value= (ulong) var->value->val_int();
return result;
}
bool sys_var_slave_skip_counter::update(THD *thd, set_var *var)
{
pthread_mutex_lock(&LOCK_active_mi);
pthread_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)
{
pthread_mutex_lock(&active_mi->rli.data_lock);
active_mi->rli.slave_skip_counter= var->save_result.ulong_value;
pthread_mutex_unlock(&active_mi->rli.data_lock);
}
pthread_mutex_unlock(&active_mi->rli.run_lock);
pthread_mutex_unlock(&LOCK_active_mi);
return 0;
}
bool sys_var_sync_binlog_period::update(THD *thd, set_var *var)
{
pthread_mutex_t *lock_log= mysql_bin_log.get_log_lock();
sync_binlog_period= var->save_result.ulong_value;
/*
Must reset the counter otherwise it may already be beyond the new period
and so the new period will not be taken into account. Need mutex otherwise
might be cancelled by a simultanate ++ in MYSQL_LOG::write().
*/
pthread_mutex_lock(lock_log);
sync_binlog_counter= 0;
pthread_mutex_unlock(lock_log);
return 0;
}
#endif /* HAVE_REPLICATION */
bool sys_var_rand_seed1::update(THD *thd, set_var *var)
{
thd->rand.seed1= (ulong) var->save_result.ulonglong_value;
return 0;
}
bool sys_var_rand_seed2::update(THD *thd, set_var *var)
{
thd->rand.seed2= (ulong) var->save_result.ulonglong_value;
return 0;
}
bool sys_var_thd_time_zone::check(THD *thd, set_var *var)
{
char buff[MAX_TIME_ZONE_NAME_LENGTH];
String str(buff, sizeof(buff), &my_charset_latin1);
String *res= var->value->val_str(&str);
#if defined(HAVE_REPLICATION) && (MYSQL_VERSION_ID < 50000)
if ((var->type == OPT_GLOBAL) &&
(mysql_bin_log.is_open() ||
active_mi->slave_running || active_mi->rli.slave_running))
{
my_printf_error(0, "Binary logging and replication forbid changing "
"of the global server time zone", MYF(0));
return 1;
}
#endif
if (!(var->save_result.time_zone=
my_tz_find(res, thd->lex->time_zone_tables_used)))
{
my_error(ER_UNKNOWN_TIME_ZONE, MYF(0), res ? res->c_ptr() : "NULL");
return 1;
}
return 0;
}
bool sys_var_thd_time_zone::update(THD *thd, set_var *var)
{
/* We are using Time_zone object found during check() phase */
*get_tz_ptr(thd,var->type)= var->save_result.time_zone;
return 0;
}
byte *sys_var_thd_time_zone::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
/*
We can use ptr() instead of c_ptr() here because String contaning
time zone name is guaranteed to be zero ended.
*/
return (byte *)((*get_tz_ptr(thd,type))->get_name()->ptr());
}
Time_zone** sys_var_thd_time_zone::get_tz_ptr(THD *thd,
enum_var_type type)
{
if (type == OPT_GLOBAL)
return &global_system_variables.time_zone;
else
return &thd->variables.time_zone;
}
void sys_var_thd_time_zone::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
{
if (default_tz_name)
{
String str(default_tz_name, &my_charset_latin1);
global_system_variables.time_zone=
my_tz_find(&str, thd->lex->time_zone_tables_used);
}
else
global_system_variables.time_zone= my_tz_SYSTEM;
}
else
thd->variables.time_zone= global_system_variables.time_zone;
}
/*
Functions to update thd->options bits
*/
static bool set_option_bit(THD *thd, set_var *var)
{
sys_var_thd_bit *sys_var= ((sys_var_thd_bit*) var->var);
if ((var->save_result.ulong_value != 0) == sys_var->reverse)
thd->options&= ~sys_var->bit_flag;
else
thd->options|= sys_var->bit_flag;
return 0;
}
static bool set_option_autocommit(THD *thd, set_var *var)
{
/* The test is negative as the flag we use is NOT autocommit */
ulong org_options=thd->options;
if (var->save_result.ulong_value != 0)
thd->options&= ~((sys_var_thd_bit*) var->var)->bit_flag;
else
thd->options|= ((sys_var_thd_bit*) var->var)->bit_flag;
if ((org_options ^ thd->options) & OPTION_NOT_AUTOCOMMIT)
{
if ((org_options & OPTION_NOT_AUTOCOMMIT))
{
/* We changed to auto_commit mode */
thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
thd->server_status|= SERVER_STATUS_AUTOCOMMIT;
if (ha_commit(thd))
return 1;
}
else
{
thd->options&= ~(ulong) (OPTION_STATUS_NO_TRANS_UPDATE);
thd->server_status&= ~SERVER_STATUS_AUTOCOMMIT;
}
}
return 0;
}
static int check_log_update(THD *thd, set_var *var)
{
#ifndef NO_EMBEDDED_ACCESS_CHECKS
if (!(thd->master_access & SUPER_ACL))
{
my_error(ER_SPECIFIC_ACCESS_DENIED_ERROR, MYF(0), "SUPER");
return 1;
}
#endif
return 0;
}
static bool set_log_update(THD *thd, set_var *var)
{
if (opt_sql_bin_update)
((sys_var_thd_bit*) var->var)->bit_flag|= (OPTION_BIN_LOG |
OPTION_UPDATE_LOG);
set_option_bit(thd, var);
return 0;
}
static int check_pseudo_thread_id(THD *thd, set_var *var)
{
var->save_result.ulonglong_value= var->value->val_int();
#ifndef NO_EMBEDDED_ACCESS_CHECKS
if (thd->master_access & SUPER_ACL)
return 0;
else
{
my_error(ER_SPECIFIC_ACCESS_DENIED_ERROR, MYF(0), "SUPER");
return 1;
}
#else
return 0;
#endif
}
static byte *get_warning_count(THD *thd)
{
thd->sys_var_tmp.long_value=
(thd->warn_count[(uint) MYSQL_ERROR::WARN_LEVEL_NOTE] +
thd->warn_count[(uint) MYSQL_ERROR::WARN_LEVEL_WARN]);
return (byte*) &thd->sys_var_tmp.long_value;
}
static byte *get_error_count(THD *thd)
{
thd->sys_var_tmp.long_value=
thd->warn_count[(uint) MYSQL_ERROR::WARN_LEVEL_ERROR];
return (byte*) &thd->sys_var_tmp.long_value;
}
/****************************************************************************
Main handling of variables:
- Initialisation
- Searching during parsing
- Update loop
****************************************************************************/
/*
Find variable name in option my_getopt structure used for command line args
SYNOPSIS
find_option()
opt option structure array to search in
name variable name
RETURN VALUES
0 Error
ptr pointer to option structure
*/
static struct my_option *find_option(struct my_option *opt, const char *name)
{
uint length=strlen(name);
for (; opt->name; opt++)
{
if (!getopt_compare_strings(opt->name, name, length) &&
!opt->name[length])
{
/*
Only accept the option if one can set values through it.
If not, there is no default value or limits in the option.
*/
return (opt->value) ? opt : 0;
}
}
return 0;
}
/*
Return variable name and length for hashing of variables
*/
static byte *get_sys_var_length(const sys_var *var, uint *length,
my_bool first)
{
*length= var->name_length;
return (byte*) var->name;
}
/*
Initialises sys variables and put them in system_variable_hash
*/
void set_var_init()
{
hash_init(&system_variable_hash, system_charset_info,
array_elements(sys_variables),0,0,
(hash_get_key) get_sys_var_length,0,0);
sys_var **var, **end;
for (var= sys_variables, end= sys_variables+array_elements(sys_variables) ;
var < end;
var++)
{
(*var)->name_length= strlen((*var)->name);
(*var)->option_limits= find_option(my_long_options, (*var)->name);
my_hash_insert(&system_variable_hash, (byte*) *var);
}
/*
Special cases
Needed because MySQL can't find the limits for a variable it it has
a different name than the command line option.
As these variables are deprecated, this code will disappear soon...
*/
sys_sql_max_join_size.option_limits= sys_max_join_size.option_limits;
}
void set_var_free()
{
hash_free(&system_variable_hash);
}
/*
Find a user set-table variable
SYNOPSIS
find_sys_var()
str Name of system variable to find
length Length of variable. zero means that we should use strlen()
on the variable
NOTE
We have to use net_printf() as this is called during the parsing stage
RETURN VALUES
pointer pointer to variable definitions
0 Unknown variable (error message is given)
*/
sys_var *find_sys_var(const char *str, uint length)
{
sys_var *var= (sys_var*) hash_search(&system_variable_hash,
(byte*) str,
length ? length :
strlen(str));
if (!var)
net_printf(current_thd, ER_UNKNOWN_SYSTEM_VARIABLE, (char*) str);
return var;
}
/*
Execute update of all variables
SYNOPSIS
sql_set
THD Thread id
set_var List of variables to update
DESCRIPTION
First run a check of all variables that all updates will go ok.
If yes, then execute all updates, returning an error if any one failed.
This should ensure that in all normal cases none all or variables are
updated
RETURN VALUE
0 ok
1 ERROR, message sent (normally no variables was updated)
-1 ERROR, message not sent
*/
int sql_set_variables(THD *thd, List<set_var_base> *var_list)
{
int error= 0;
List_iterator_fast<set_var_base> it(*var_list);
DBUG_ENTER("sql_set_variables");
set_var_base *var;
while ((var=it++))
{
if ((error=var->check(thd)))
DBUG_RETURN(error);
}
if (thd->net.report_error)
DBUG_RETURN(1);
it.rewind();
while ((var=it++))
error|= var->update(thd); // Returns 0, -1 or 1
DBUG_RETURN(error);
}
/*
Say if all variables set by a SET support the ONE_SHOT keyword (currently,
only character set and collation do; later timezones will).
SYNOPSIS
not_all_support_one_shot
set_var List of variables to update
NOTES
It has a "not_" because it makes faster tests (no need to "!")
RETURN VALUE
0 all variables of the list support ONE_SHOT
1 at least one does not support ONE_SHOT
*/
bool not_all_support_one_shot(List<set_var_base> *var_list)
{
List_iterator_fast<set_var_base> it(*var_list);
set_var_base *var;
while ((var= it++))
{
if (var->no_support_one_shot())
return 1;
}
return 0;
}
/*****************************************************************************
Functions to handle SET mysql_internal_variable=const_expr
*****************************************************************************/
int set_var::check(THD *thd)
{
if (var->check_type(type))
{
my_error(type == OPT_GLOBAL ? ER_LOCAL_VARIABLE : ER_GLOBAL_VARIABLE,
MYF(0),
var->name);
return -1;
}
if ((type == OPT_GLOBAL && check_global_access(thd, SUPER_ACL)))
return 1;
/* value is a NULL pointer if we are using SET ... = DEFAULT */
if (!value)
{
if (var->check_default(type))
{
my_error(ER_NO_DEFAULT, MYF(0), var->name);
return -1;
}
return 0;
}
if (value->fix_fields(thd, 0, &value) || value->check_cols(1))
return -1;
if (var->check_update_type(value->result_type()))
{
my_error(ER_WRONG_TYPE_FOR_VAR, MYF(0), var->name);
return -1;
}
return var->check(thd, this) ? -1 : 0;
}
/*
Check variable, but without assigning value (used by PS)
SYNOPSIS
set_var::light_check()
thd thread handler
RETURN VALUE
0 ok
1 ERROR, message sent (normally no variables was updated)
-1 ERROR, message not sent
*/
int set_var::light_check(THD *thd)
{
if (var->check_type(type))
{
my_error(type == OPT_GLOBAL ? ER_LOCAL_VARIABLE : ER_GLOBAL_VARIABLE,
MYF(0),
var->name);
return -1;
}
if (type == OPT_GLOBAL && check_global_access(thd, SUPER_ACL))
return 1;
if (value && (value->fix_fields(thd, 0, &value) || value->check_cols(1)))
return -1;
return 0;
}
int set_var::update(THD *thd)
{
if (!value)
var->set_default(thd, type);
else if (var->update(thd, this))
return -1; // should never happen
if (var->after_update)
(*var->after_update)(thd, type);
return 0;
}
/*****************************************************************************
Functions to handle SET @user_variable=const_expr
*****************************************************************************/
int set_var_user::check(THD *thd)
{
/*
Item_func_set_user_var can't substitute something else on its place =>
0 can be passed as last argument (reference on item)
*/
return (user_var_item->fix_fields(thd, 0, (Item**) 0) ||
user_var_item->check()) ? -1 : 0;
}
/*
Check variable, but without assigning value (used by PS)
SYNOPSIS
set_var_user::light_check()
thd thread handler
RETURN VALUE
0 ok
1 ERROR, message sent (normally no variables was updated)
-1 ERROR, message not sent
*/
int set_var_user::light_check(THD *thd)
{
/*
Item_func_set_user_var can't substitute something else on its place =>
0 can be passed as last argument (reference on item)
*/
return (user_var_item->fix_fields(thd, 0, (Item**) 0));
}
int set_var_user::update(THD *thd)
{
if (user_var_item->update())
{
/* Give an error if it's not given already */
my_error(ER_SET_CONSTANTS_ONLY, MYF(0));
return -1;
}
return 0;
}
/*****************************************************************************
Functions to handle SET PASSWORD
*****************************************************************************/
int set_var_password::check(THD *thd)
{
#ifndef NO_EMBEDDED_ACCESS_CHECKS
if (!user->host.str)
user->host.str= (char*) thd->host_or_ip;
/* Returns 1 as the function sends error to client */
return check_change_password(thd, user->host.str, user->user.str, password) ?
1 : 0;
#else
return 0;
#endif
}
int set_var_password::update(THD *thd)
{
#ifndef NO_EMBEDDED_ACCESS_CHECKS
/* Returns 1 as the function sends error to client */
return change_password(thd, user->host.str, user->user.str, password) ?
1 : 0;
#else
return 0;
#endif
}
/****************************************************************************
Functions to handle table_type
****************************************************************************/
/* Based upon sys_var::check_enum() */
bool sys_var_thd_storage_engine::check(THD *thd, set_var *var)
{
char buff[80];
const char *value;
String str(buff, sizeof(buff), &my_charset_latin1), *res;
if (var->value->result_type() == STRING_RESULT)
{
if (!(res=var->value->val_str(&str)) ||
!(var->save_result.ulong_value=
(ulong) ha_resolve_by_name(res->ptr(), res->length())))
{
value= res ? res->c_ptr() : "NULL";
goto err;
}
return 0;
}
value= "unknown";
err:
my_error(ER_UNKNOWN_STORAGE_ENGINE, MYF(0), value);
return 1;
}
byte *sys_var_thd_storage_engine::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
ulong val;
val= ((type == OPT_GLOBAL) ? global_system_variables.*offset :
thd->variables.*offset);
const char *table_type= ha_get_storage_engine((enum db_type)val);
return (byte *) table_type;
}
void sys_var_thd_storage_engine::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
global_system_variables.*offset= (ulong) DB_TYPE_MYISAM;
else
thd->variables.*offset= (ulong) (global_system_variables.*offset);
}
bool sys_var_thd_storage_engine::update(THD *thd, set_var *var)
{
if (var->type == OPT_GLOBAL)
global_system_variables.*offset= var->save_result.ulong_value;
else
thd->variables.*offset= var->save_result.ulong_value;
return 0;
}
void sys_var_thd_table_type::warn_deprecated(THD *thd)
{
push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_WARN,
ER_WARN_DEPRECATED_SYNTAX,
ER(ER_WARN_DEPRECATED_SYNTAX), "table_type", "storage_engine");
}
void sys_var_thd_table_type::set_default(THD *thd, enum_var_type type)
{
warn_deprecated(thd);
sys_var_thd_storage_engine::set_default(thd, type);
}
bool sys_var_thd_table_type::update(THD *thd, set_var *var)
{
warn_deprecated(thd);
return sys_var_thd_storage_engine::update(thd, var);
}
/****************************************************************************
Functions to handle sql_mode
****************************************************************************/
byte *sys_var_thd_sql_mode::value_ptr(THD *thd, enum_var_type type,
LEX_STRING *base)
{
ulong val;
char buff[256];
String tmp(buff, sizeof(buff), &my_charset_latin1);
tmp.length(0);
val= ((type == OPT_GLOBAL) ? global_system_variables.*offset :
thd->variables.*offset);
for (uint i= 0; val; val>>= 1, i++)
{
if (val & 1)
{
tmp.append(enum_names->type_names[i]);
tmp.append(',');
}
}
if (tmp.length())
tmp.length(tmp.length() - 1);
return (byte*) thd->strmake(tmp.ptr(), tmp.length());
}
void sys_var_thd_sql_mode::set_default(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
global_system_variables.*offset= 0;
else
thd->variables.*offset= global_system_variables.*offset;
}
void fix_sql_mode_var(THD *thd, enum_var_type type)
{
if (type == OPT_GLOBAL)
global_system_variables.sql_mode=
fix_sql_mode(global_system_variables.sql_mode);
else
thd->variables.sql_mode= fix_sql_mode(thd->variables.sql_mode);
}
/* Map database specific bits to function bits */
ulong fix_sql_mode(ulong sql_mode)
{
/*
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.
*/
if (sql_mode & MODE_ANSI)
sql_mode|= (MODE_REAL_AS_FLOAT | MODE_PIPES_AS_CONCAT | MODE_ANSI_QUOTES |
MODE_IGNORE_SPACE | MODE_ONLY_FULL_GROUP_BY);
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);
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);
if (sql_mode & MODE_MYSQL40)
sql_mode|= MODE_NO_FIELD_OPTIONS;
if (sql_mode & MODE_MYSQL323)
sql_mode|= MODE_NO_FIELD_OPTIONS;
return sql_mode;
}
/****************************************************************************
Named list handling
****************************************************************************/
gptr find_named(I_List<NAMED_LIST> *list, const char *name, uint length,
NAMED_LIST **found)
{
I_List_iterator<NAMED_LIST> it(*list);
NAMED_LIST *element;
while ((element= it++))
{
if (element->cmp(name, length))
{
if (found)
*found= element;
return element->data;
}
}
return 0;
}
void delete_elements(I_List<NAMED_LIST> *list,
void (*free_element)(const char *name, gptr))
{
NAMED_LIST *element;
DBUG_ENTER("delete_elements");
while ((element= list->get()))
{
(*free_element)(element->name, element->data);
delete element;
}
DBUG_VOID_RETURN;
}
/* Key cache functions */
static KEY_CACHE *create_key_cache(const char *name, uint length)
{
KEY_CACHE *key_cache;
DBUG_ENTER("create_key_cache");
DBUG_PRINT("enter",("name: %.*s", length, name));
if ((key_cache= (KEY_CACHE*) my_malloc(sizeof(KEY_CACHE),
MYF(MY_ZEROFILL | MY_WME))))
{
if (!new NAMED_LIST(&key_caches, name, length, (gptr) key_cache))
{
my_free((char*) key_cache, MYF(0));
key_cache= 0;
}
else
{
/*
Set default values for a key cache
The values in dflt_key_cache_var is set by my_getopt() at startup
We don't set 'buff_size' as this is used to enable the key cache
*/
key_cache->param_block_size= dflt_key_cache_var.param_block_size;
key_cache->param_division_limit= dflt_key_cache_var.param_division_limit;
key_cache->param_age_threshold= dflt_key_cache_var.param_age_threshold;
}
}
DBUG_RETURN(key_cache);
}
KEY_CACHE *get_or_create_key_cache(const char *name, uint length)
{
LEX_STRING key_cache_name;
KEY_CACHE *key_cache;
key_cache_name.str= (char *) name;
key_cache_name.length= length;
pthread_mutex_lock(&LOCK_global_system_variables);
if (!(key_cache= get_key_cache(&key_cache_name)))
key_cache= create_key_cache(name, length);
pthread_mutex_unlock(&LOCK_global_system_variables);
return key_cache;
}
void free_key_cache(const char *name, KEY_CACHE *key_cache)
{
ha_end_key_cache(key_cache);
my_free((char*) key_cache, MYF(0));
}
bool process_key_caches(int (* func) (const char *name, KEY_CACHE *))
{
I_List_iterator<NAMED_LIST> it(key_caches);
NAMED_LIST *element;
while ((element= it++))
{
KEY_CACHE *key_cache= (KEY_CACHE *) element->data;
func(element->name, key_cache);
}
return 0;
}
/****************************************************************************
Used templates
****************************************************************************/
#ifdef __GNUC__
template class List<set_var_base>;
template class List_iterator_fast<set_var_base>;
template class I_List_iterator<NAMED_LIST>;
#endif
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