diff options
Diffstat (limited to 'sql/slave.h')
| -rw-r--r-- | sql/slave.h | 55 |
1 files changed, 32 insertions, 23 deletions
diff --git a/sql/slave.h b/sql/slave.h index 5a85e26d9ad..c41234ab2ed 100644 --- a/sql/slave.h +++ b/sql/slave.h @@ -1,15 +1,15 @@ /* 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 */ @@ -93,11 +93,6 @@ extern my_bool opt_log_slave_updates; extern ulonglong relay_log_space_limit; struct st_master_info; -enum enum_binlog_formats { - BINLOG_FORMAT_CURRENT=0, /* 0 is important for easy 'if (mi->old_format)' */ - BINLOG_FORMAT_323_LESS_57, - BINLOG_FORMAT_323_GEQ_57 }; - /* 3 possible values for MASTER_INFO::slave_running and RELAY_LOG_INFO::slave_running. @@ -214,6 +209,8 @@ typedef struct st_relay_log_info ulonglong group_relay_log_pos; char event_relay_log_name[FN_REFLEN]; ulonglong event_relay_log_pos; + ulonglong future_event_relay_log_pos; + /* Original log name and position of the group we're currently executing (whose coordinates are group_relay_log_name/pos in the relay log) @@ -295,6 +292,7 @@ typedef struct st_relay_log_info UNTIL_LOG_NAMES_CMP_EQUAL= 0, UNTIL_LOG_NAMES_CMP_GREATER= 1 } until_log_names_cmp_result; + char cached_charset[6]; /* trans_retries varies between 0 to slave_transaction_retries and counts how many times the slave has retried the present transaction; gets reset to 0 @@ -327,12 +325,14 @@ typedef struct st_relay_log_info until_log_names_cmp_result= UNTIL_LOG_NAMES_CMP_UNKNOWN; } - inline void inc_event_relay_log_pos(ulonglong val) + inline void inc_event_relay_log_pos() { - event_relay_log_pos+= val; + event_relay_log_pos= future_event_relay_log_pos; } - void inc_group_relay_log_pos(ulonglong val, ulonglong log_pos, bool skip_lock=0); + void inc_group_relay_log_pos(ulonglong log_pos, + bool skip_lock=0); + int wait_for_pos(THD* thd, String* log_name, longlong log_pos, longlong timeout); void close_temporary_tables(); @@ -344,6 +344,14 @@ typedef struct st_relay_log_info return ((until_condition == UNTIL_MASTER_POS) ? group_master_log_pos : group_relay_log_pos); } + /* + Last charset (6 bytes) seen by slave SQL thread is cached here; it helps + the thread save 3 get_charset() per Query_log_event if the charset is not + changing from event to event (common situation). + When the 6 bytes are equal to 0 is used to mean "cache is invalidated". + */ + void cached_charset_invalidate(); + bool cached_charset_compare(char *charset); } RELAY_LOG_INFO; @@ -392,11 +400,11 @@ typedef struct st_master_info my_bool ssl; // enables use of SSL connection if true char ssl_ca[FN_REFLEN], ssl_capath[FN_REFLEN], ssl_cert[FN_REFLEN]; char ssl_cipher[FN_REFLEN], ssl_key[FN_REFLEN]; - + my_off_t master_log_pos; File fd; // we keep the file open, so we need to remember the file pointer IO_CACHE file; - + pthread_mutex_t data_lock,run_lock; pthread_cond_t data_cond,start_cond,stop_cond; THD *io_thd; @@ -409,11 +417,10 @@ typedef struct st_master_info int events_till_abort; #endif bool inited; - enum enum_binlog_formats old_format; volatile bool abort_slave; volatile uint slave_running; volatile ulong slave_run_id; - /* + /* The difference in seconds between the clock of the master and the clock of the slave (second - first). It must be signed as it may be <0 or >0. clock_diff_with_master is computed when the I/O thread starts; for this the @@ -422,16 +429,16 @@ typedef struct st_master_info clock_of_slave - last_timestamp_executed_by_SQL_thread - clock_diff_with_master */ - long clock_diff_with_master; - + long clock_diff_with_master; + st_master_info() - :ssl(0), fd(-1), io_thd(0), inited(0), old_format(BINLOG_FORMAT_CURRENT), + :ssl(0), fd(-1), io_thd(0), inited(0), abort_slave(0),slave_running(0), slave_run_id(0) { host[0] = 0; user[0] = 0; password[0] = 0; ssl_ca[0]= 0; ssl_capath[0]= 0; ssl_cert[0]= 0; ssl_cipher[0]= 0; ssl_key[0]= 0; - + bzero((char*) &file, sizeof(file)); pthread_mutex_init(&run_lock, MY_MUTEX_INIT_FAST); pthread_mutex_init(&data_lock, MY_MUTEX_INIT_FAST); @@ -518,8 +525,8 @@ int fetch_master_table(THD* thd, const char* db_name, const char* table_name, void table_rule_ent_hash_to_str(String* s, HASH* h); void table_rule_ent_dynamic_array_to_str(String* s, DYNAMIC_ARRAY* a); -int show_master_info(THD* thd, MASTER_INFO* mi); -int show_binlog_info(THD* thd); +bool show_master_info(THD* thd, MASTER_INFO* mi); +bool show_binlog_info(THD* thd); /* See if the query uses any tables that should not be replicated */ bool tables_ok(THD* thd, TABLE_LIST* tables); @@ -551,16 +558,18 @@ int init_master_info(MASTER_INFO* mi, const char* master_info_fname, bool abort_if_no_master_info_file, int thread_mask); void end_master_info(MASTER_INFO* mi); -int init_relay_log_info(RELAY_LOG_INFO* rli, const char* info_fname); void end_relay_log_info(RELAY_LOG_INFO* rli); void lock_slave_threads(MASTER_INFO* mi); void unlock_slave_threads(MASTER_INFO* mi); void init_thread_mask(int* mask,MASTER_INFO* mi,bool inverse); int init_relay_log_pos(RELAY_LOG_INFO* rli,const char* log,ulonglong pos, - bool need_data_lock, const char** errmsg); + bool need_data_lock, const char** errmsg, + bool look_for_description_event); int purge_relay_logs(RELAY_LOG_INFO* rli, THD *thd, bool just_reset, const char** errmsg); +void set_slave_thread_options(THD* thd); +void set_slave_thread_default_charset(THD* thd, RELAY_LOG_INFO *rli); void rotate_relay_log(MASTER_INFO* mi); extern "C" pthread_handler_decl(handle_slave_io,arg); |