Added 'PURGE LOGS BEFORE' command

Added expire-logs-days option 


mysql-test/r/rpl_rotate_logs.result:
  Added test for 'PURGE LOGS BEFORE'
mysql-test/t/rpl_rotate_logs.test:
  Added test for 'PURGE LOGS BEFORE'
sql/log.cc:
  For 'Purge logs before' command
sql/mysqld.cc:
  Added 'expire-logs-days' option
sql/set_var.cc:
  Added 'expire-logs-days' option
sql/sql_class.h:
  For 'Purge logs before' command
sql/sql_parse.cc:
  Added 'expire-logs-days' option
sql/sql_yacc.yy:
  For 'Purge logs before' command

mysql-test/r/rpl_rotate_logs.result

@@ -40,7 +40,12 @@ set insert_id=1234;
 insert into t2 values(NULL);
 set global sql_slave_skip_counter=1;
 start slave;
-purge master logs to 'master-bin.000003';
+purge master logs to 'master-bin.000002';
+show binary logs;
+Log_name
+master-bin.000002
+master-bin.000003
+purge logs before now();
 show binary logs;
 Log_name
 master-bin.000003

mysql-test/t/rpl_rotate_logs.test

@@ -89,7 +89,9 @@ connection master;
 #let slave catch up
 sync_slave_with_master;
 connection master;
-purge master logs to 'master-bin.000003';
+purge master logs to 'master-bin.000002';
+show binary logs;
+purge logs before now();
 show binary logs;
 insert into t2 values (65);
 sync_slave_with_master;

sql/log.cc

@@ -679,6 +679,19 @@ err:
   DBUG_RETURN(error);
 }
 
+/*
+  Update log index_file
+*/
+
+int MYSQL_LOG::update_log_index(LOG_INFO* log_info)
+{
+  if (copy_up_file_and_fill(&index_file, log_info->index_file_start_offset))
+    return LOG_INFO_IO;
+
+  // now update offsets in index file for running threads
+  adjust_linfo_offsets(log_info->index_file_start_offset);
+  return 0;
+}
 
 /*
   Remove all logs before the given log from disk and from the index file.
@@ -731,15 +744,7 @@ int MYSQL_LOG::purge_logs(THD* thd, const char* to_log)
     If we get killed -9 here, the sysadmin would have to edit
     the log index file after restart - otherwise, this should be safe
   */
-
-  if (copy_up_file_and_fill(&index_file, log_info.index_file_start_offset))
-  {
-    error= LOG_INFO_IO;
-    goto err;
-  }
-
-  // now update offsets in index file for running threads
-  adjust_linfo_offsets(log_info.index_file_start_offset);
+  error= update_log_index(&log_info);
 
 err:
   pthread_mutex_unlock(&LOCK_index);
@@ -789,11 +794,10 @@ int MYSQL_LOG::purge_logs_before_date(THD* thd, time_t purge_time)
 	 !log_in_use(log_info.log_file_name))
   {
     /* It's not fatal even if we can't delete a log file */
-    if (my_stat(log_info.log_file_name, &stat_area, MYF(0)) &&
-	stat_area.st_mtime < purge_time)
-      my_delete(log_info.log_file_name, MYF(0));
-    else
+    if (!my_stat(log_info.log_file_name, &stat_area, MYF(0)) ||
+	stat_area.st_mtime >= purge_time)
       break;
+    my_delete(log_info.log_file_name, MYF(0));
     if (find_next_log(&log_info, 0))
       break;
   }
@@ -802,15 +806,7 @@ int MYSQL_LOG::purge_logs_before_date(THD* thd, time_t purge_time)
     If we get killed -9 here, the sysadmin would have to edit
     the log index file after restart - otherwise, this should be safe
   */
-
-  if (copy_up_file_and_fill(&index_file, log_info.index_file_start_offset))
-  {
-    error= LOG_INFO_IO;
-    goto err;
-  }
-
-  // now update offsets in index file for running threads
-  adjust_linfo_offsets(log_info.index_file_start_offset);
+  error= update_log_index(&log_info);
 
 err:
   pthread_mutex_unlock(&LOCK_index);
@@ -1235,7 +1231,7 @@ err:
   }
 
   pthread_mutex_unlock(&LOCK_log);
-  if (should_rotate && ~expire_logs_days)
+  if (should_rotate && expire_logs_days)
   {
     long purge_time= time(0) - expire_logs_days*24*60*60;
     if (purge_time >= 0)

sql/mysqld.cc

@@ -392,7 +392,7 @@ ulong max_connections,max_insert_delayed_threads,max_used_connections,
       max_connect_errors, max_user_connections = 0;
 ulong thread_id=1L,current_pid;
 ulong slow_launch_threads = 0;
-ulong expire_logs_days = ~0L;
+ulong expire_logs_days = 0;
 
 char mysql_real_data_home[FN_REFLEN],
      language[LIBLEN],reg_ext[FN_EXTLEN],
@@ -2159,7 +2159,7 @@ The server will not act as a slave.");
     open_log(&mysql_bin_log, glob_hostname, opt_bin_logname, "-bin",
 	     opt_binlog_index_name,LOG_BIN);
     using_update_log=1;
-    if (~expire_logs_days)
+    if (expire_logs_days)
     {
       long purge_time= time(0) - expire_logs_days*24*60*60;
       if (purge_time >= 0)
@@ -4031,7 +4031,7 @@ struct my_option my_long_options[] =
    "Logs will be rotated after expire-log-days days. ",
    (gptr*) &expire_logs_days,
    (gptr*) &expire_logs_days, 0, GET_ULONG,
-   REQUIRED_ARG, ~0L, 0, 99, 0, 1, 0},
+   REQUIRED_ARG, 0, 0, 99, 0, 1, 0},
   {0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
 };
 

sql/set_var.cc

@@ -118,6 +118,8 @@ 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_thd_ulong	sys_interactive_timeout("interactive_timeout",
@@ -332,6 +334,7 @@ sys_var *sys_variables[]=
   &sys_delayed_insert_timeout,
   &sys_delayed_queue_size,
   &sys_error_count,
+  &sys_expire_logs_days,
   &sys_flush,
   &sys_flush_time,
   &sys_foreign_key_checks,
@@ -435,6 +438,7 @@ struct show_var_st init_vars[]= {
   {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},
   {"ft_min_word_len",         (char*) &ft_min_word_len,             SHOW_LONG},

sql/sql_class.h

@@ -133,6 +133,7 @@ public:
   int generate_new_name(char *new_name,const char *old_name);
   void make_log_name(char* buf, const char* log_ident);
   bool is_active(const char* log_file_name);
+  int update_log_index(LOG_INFO* linfo);
   int purge_logs(THD* thd, const char* to_log);
   int purge_logs_before_date(THD* thd, time_t purge_time);
   int purge_first_log(struct st_relay_log_info* rli); 

sql/sql_parse.cc

@@ -3813,7 +3813,7 @@ bool reload_acl_and_cache(THD *thd, ulong options, TABLE_LIST *tables)
     mysql_log.new_file(1);
     mysql_update_log.new_file(1);
     mysql_bin_log.new_file(1);
-    if (~expire_logs_days)
+    if (expire_logs_days)
     {
       long purge_time= time(0) - expire_logs_days*24*60*60;
       if (purge_time >= 0)

sql/sql_yacc.yy

@@ -3565,10 +3565,9 @@ purge:
 	;
 
 purge_options:
-	LOGS_SYM
-	purge_option
-	| MASTER_SYM LOGS_SYM
-	purge_option;
+	LOGS_SYM purge_option
+	| MASTER_SYM LOGS_SYM purge_option
+	;
 
 purge_option:
         TO_SYM TEXT_STRING
@@ -3586,7 +3585,8 @@ purge_option:
 	  Item *tmp= new Item_func_unix_timestamp($2);
 	  Lex->sql_command = SQLCOM_PURGE_BEFORE;
 	  Lex->purge_time= tmp->val_int();
-	};
+	}
+	;
 
 /* kill threads */
 
@@ -3596,7 +3596,6 @@ kill:
 	  LEX *lex=Lex;
 	  if ($2->check_cols(1) || $2->fix_fields(lex->thd, 0, &$2))
 	  {
-
 	    send_error(lex->thd, ER_SET_CONSTANTS_ONLY);
 	    YYABORT;
 	  }