WL#3015: Logging Improvements - No Restarts(ver N4)

Added slow_query_log & general_log global upadatable variables.
Added slow-query-log & general-log startup options.
Added log_output, general_log_file, slow_query_log_file global updatable variables.


mysql-test/r/show_check.result:
  WL#3015: Logging Improvements - No Restarts
  result fix
sql/log.cc:
  WL#3015: Logging Improvements - No Restarts
  added methods to LOGGER class
  void deactivate_log_handlers(THD* thd, uint log_type);
  bool activate_log_handlers(THD* thd, uint log_type);
  added methods to Log_to_file_event_handler:
  TABLE_LIST *get_mysql_slow_log()
  TABLE_LIST *get_mysql_log()
sql/log.h:
  WL#3015: Logging Improvements - No Restarts
  added methods to LOGGER class
  void deactivate_log_handlers(THD* thd, uint log_type);
  bool activate_log_handlers(THD* thd, uint log_type);
  added methods to Log_to_file_event_handler:
  TABLE_LIST *get_mysql_slow_log()
  TABLE_LIST *get_mysql_log()
sql/mysql_priv.h:
  WL#3015: Logging Improvements - No Restarts
sql/mysqld.cc:
  WL#3015: Logging Improvements - No Restarts
  added 'slow-query-log' & 'general-log' options
sql/set_var.cc:
  WL#3015: Logging Improvements - No Restarts
  added 'slow_query_log' & 'general_log' updatable variables
  added 'log_output', 'general_log_file', 'slow_query_log_file' updatable variables
sql/set_var.h:
  WL#3015: Logging Improvements - No Restarts
  new class sys_var_log_state
  new class sys_var_log_output
sql/share/errmsg.txt:
  WL#3015: Logging Improvements - No Restarts
  added error message
sql/sql_delete.cc:
  WL#3015: Logging Improvements - No Restarts
  'truncate table slow_log|general', keep status of logs

1 files changed, 17 insertions, 2 deletions

diff --git a/sql/log.h b/sql/log.h
index 03d5466e549..49aae15feee 100644
--- a/sql/log.h
+++ b/sql/log.h
@@ -438,6 +438,8 @@ public:
                            CHARSET_INFO *client_cs);
   void flush();
   void init_pthread_objects();
+  MYSQL_LOG *get_mysql_slow_log() { return &mysql_slow_log; }
+  MYSQL_LOG *get_mysql_log() { return &mysql_log; }
 };
 
 
@@ -510,8 +512,21 @@ public:
   void init_error_log(uint error_log_printer);
   void init_slow_log(uint slow_log_printer);
   void init_general_log(uint general_log_printer);
- };
-
+  void deactivate_log_handler(THD* thd, uint log_type);
+  bool activate_log_handler(THD* thd, uint log_type);
+  MYSQL_LOG *get_slow_log_file_handler()
+  { 
+    if (file_log_handler)
+      return file_log_handler->get_mysql_slow_log();
+    return NULL;
+  }
+  MYSQL_LOG *get_log_file_handler()
+  { 
+    if (file_log_handler)
+      return file_log_handler->get_mysql_log();
+    return NULL;
+  }
+};
 
 enum enum_binlog_format {
   BINLOG_FORMAT_STMT= 0, // statement-based