diff options
Diffstat (limited to 'sql/slave.h')
| -rw-r--r-- | sql/slave.h | 32 |
1 files changed, 21 insertions, 11 deletions
diff --git a/sql/slave.h b/sql/slave.h index 9be5a1144f6..a29315f7ae4 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 */ @@ -295,7 +295,10 @@ typedef struct st_relay_log_info UNTIL_LOG_NAMES_CMP_UNKNOWN= -2, UNTIL_LOG_NAMES_CMP_LESS= -1, UNTIL_LOG_NAMES_CMP_EQUAL= 0, UNTIL_LOG_NAMES_CMP_GREATER= 1 } until_log_names_cmp_result; - + + char cached_charset[6]; + ulong trans_retries; + st_relay_log_info(); ~st_relay_log_info(); @@ -338,6 +341,14 @@ 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; @@ -386,11 +397,11 @@ 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; @@ -406,7 +417,7 @@ typedef struct st_master_info 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 @@ -415,8 +426,8 @@ 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), abort_slave(0),slave_running(0), slave_run_id(0) @@ -424,7 +435,7 @@ typedef struct st_master_info 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); @@ -517,7 +528,6 @@ 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); |