Added --warnings to mysqld

Docs/manual.texi:
  Changelog
sql/mysql_priv.h:
  Added --warnings
sql/mysqld.cc:
  Added --warnings
sql/sql_parse.cc:
  Added --warnings

Docs/manual.texi

@@ -10531,6 +10531,9 @@ Run @code{mysqld} daemon as user @code{user_name}.  This option is
 @item -V, --version
 Output version information and exit.
 
+@item -W, --warnings
+Print out warnings like @code{Aborted connection...} to the @code{.err} file.
+@xref{Communication errors}.
 @end table
 
 @cindex default options
@@ -25795,8 +25798,8 @@ in its own lock table and rolls back the transaction. If you use
 than InnoDB in the same transaction, then a deadlock may arise which
 InnoDB cannot notice. In cases like this the timeout is useful to
 resolve the situation.
-@item @code{innodb_unix_file_flush_method} @tab
-(Available from 3.23.39 up.)
+@item @code{innodb_flush_method} @tab
+(Available from 3.23.40 up.)
 The default value for this is @code{fdatasync}.
 Another option is @code{O_DSYNC}.
 Options @code{littlesync} and @code{nosync} have the
@@ -26406,7 +26409,7 @@ In some versions of Linux and Unix, flushing files to disk with the Unix
 @code{fdatasync} and other similar methods is surprisingly slow.
 The default method InnoDB uses is the @code{fdatasync} function.
 If you are not satisfied with the database write performance, you may
-try setting @code{innodb_unix_file_flush_method} in @file{my.cnf}
+try setting @code{innodb_flush_method} in @file{my.cnf}
 to @code{O_DSYNC}, though O_DSYNC seems to be slower on most systems.
 You can also try setting it to @code{littlesync}, which means that
 InnoDB does not call the file flush for every write it does to a
@@ -38212,6 +38215,9 @@ option.
 @node Communication errors, Full table, Packet too large, Common errors
 @subsection Communication Errors / Aborted Connection
 
+Starting with @code{MySQL 3.23.40} you only get the @code{Aborted
+connection} error of you start @code{mysqld} with @code{--warnings}.
+
 If you find errors like the following in your error log.
 
 @example
@@ -46298,6 +46304,16 @@ Our TODO section contains what we plan to have in 4.0. @xref{TODO MySQL 4.0}.
 Added support for symbolic links to @code{MyISAM} tables. Symlink handling is
 now enabled by default for Windows.
 @item
+@code{LOAD DATA FROM MASTER} "auto-magically" sets up a slave.
+@item
+A new @code{HANDLER} interface to @code{MyISAM} tables.
+@item
+@code{COUNT(DISTINCT)} is about 30% faster.
+@item
+Creating full text indexes are now much faster.
+@item
+Searching on packed (@code{CHAR}/@code{VARCHAR}) keys are now much faster.
+@item
 Added @code{SQL_CALC_FOUND_ROWS} and @code{FOUND_ROWS()}. This makes it
 possible to know how many rows a query would have returned
 without a @code{LIMIT} clause.
@@ -46406,6 +46422,12 @@ not yet 100% confident in this code.
 @appendixsubsec Changes in release 3.23.40
 @itemize @bullet
 @item
+Added option @code{--warnings} to @code{mysqld}. Now @code{mysqld}
+only prints the error @code{Aborted connection} if this option is used.
+@item
+Fixed properly the rename of @code{innodb_unix_file_flush_method} to
+@code{innodb_flush_method}.
+@item
 Fixed bug when converting @code{UNSIGNED BIGINT} to @code{DOUBLE}. This caused
 a problem when doing comparisons with @code{BIGINT}'s outside of the
 signed range.

sql/mysql_priv.h

@@ -533,7 +533,7 @@ extern ulong keybuff_size,sortbuff_size,max_item_sort_length,table_cache_size,
 	     binlog_cache_size, max_binlog_cache_size;
 extern ulong specialflag, current_pid;
 extern bool low_priority_updates, using_update_log;
-extern bool opt_sql_bin_update, opt_safe_show_db;
+extern bool opt_sql_bin_update, opt_safe_show_db, opt_warnings;
 extern char language[LIBLEN],reg_ext[FN_EXTLEN],blob_newline;
 extern const char **errmesg;			/* Error messages */
 extern const char *default_tx_isolation_name;

sql/mysqld.cc

@@ -210,7 +210,7 @@ static char mysql_home[FN_REFLEN],pidfile_name[FN_REFLEN];
 static pthread_t select_thread;
 static bool opt_log,opt_update_log,opt_bin_log,opt_slow_log,opt_noacl,
 	    opt_disable_networking=0, opt_bootstrap=0,opt_skip_show_db=0,
-            opt_ansi_mode=0,opt_myisam_log=0,
+	    opt_ansi_mode=0,opt_myisam_log=0,
             opt_large_files=sizeof(my_off_t) > 4;
 bool opt_sql_bin_update = 0, opt_log_slave_updates = 0, opt_safe_show_db=0;
 FILE *bootstrap_file=0;
@@ -275,7 +275,7 @@ ulong max_tmp_tables,max_heap_table_size;
 ulong bytes_sent = 0L, bytes_received = 0L;
 
 bool opt_endinfo,using_udf_functions,low_priority_updates, locked_in_memory;
-bool opt_using_transactions, using_update_log;
+bool opt_using_transactions, using_update_log, opt_warnings=0;
 bool volatile abort_loop,select_thread_in_use,grant_option;
 bool volatile ready_to_exit,shutdown_in_progress;
 ulong refresh_version=1L,flush_version=1L;	/* Increments on each reload */
@@ -2455,7 +2455,7 @@ enum options {
                OPT_INNODB_LOG_ARCH_DIR, 
                OPT_INNODB_LOG_ARCHIVE, 
                OPT_INNODB_FLUSH_LOG_AT_TRX_COMMIT, 
-               OPT_INNODB_UNIX_FILE_FLUSH_METHOD, 
+               OPT_innodb_flush_method, 
                OPT_SAFE_SHOW_DB,
 	       OPT_GEMINI_SKIP, OPT_INNODB_SKIP,
                OPT_TEMP_POOL, OPT_TX_ISOLATION,
@@ -2516,7 +2516,7 @@ static struct option long_options[] = {
      OPT_INNODB_LOG_ARCHIVE},
   {"innodb_flush_log_at_trx_commit", optional_argument, 0,
      OPT_INNODB_FLUSH_LOG_AT_TRX_COMMIT},
-  {"innodb_unix_file_flush_method", required_argument, 0,
+  {"innodb_flush_method", required_argument, 0,
     OPT_INNODB_UNIX_FILE_FLUSH_METHOD},
 #endif
   {"help",                  no_argument,       0, '?'},
@@ -2603,6 +2603,7 @@ static struct option long_options[] = {
 #endif
   {"user",                  required_argument, 0, 'u'},
   {"version",               no_argument,       0, 'V'},
+  {"warnings",		    no_argument,       0, 'W'},
   {0, 0, 0, 0}
 };
 
@@ -2796,7 +2797,7 @@ struct show_var_st init_vars[]= {
   {"innodb_log_arch_dir",   (char*) &innobase_log_arch_dir, 	    SHOW_CHAR_PTR},
   {"innodb_log_archive",    (char*) &innobase_log_archive, 	    SHOW_MY_BOOL},
   {"innodb_log_group_home_dir", (char*) &innobase_log_group_home_dir, SHOW_CHAR_PTR},
-  {"innodb_unix_file_flush_method",    (char*) &innobase_unix_file_flush_method, SHOW_CHAR_PTR},
+  {"innodb_flush_method",    (char*) &innobase_unix_file_flush_method, SHOW_CHAR_PTR},
 #endif
   {"interactive_timeout",     (char*) &net_interactive_timeout,     SHOW_LONG},
   {"join_buffer_size",        (char*) &join_buff_size,              SHOW_LONG},
@@ -3033,7 +3034,8 @@ static void usage(void)
 		        Default transaction isolation level\n\
   --temp-pool           Use a pool of temporary files\n\
   -u, --user=user_name	Run mysqld daemon as user\n\
-  -V, --version		output version information and exit");
+  -V, --version		output version information and exit\n\
+  -W, --warnings        Log some not critical warnings to the log file\n");
 #ifdef __WIN__
   puts("NT and Win32 specific options:\n\
   --console		Don't remove the console window\n\
@@ -3073,7 +3075,7 @@ static void usage(void)
   puts("\
   --innodb_data_home_dir=dir   The common part for Innodb table spaces\n\
   --innodb_data_file_path=dir  Path to individual files and their sizes\n\
-  --innodb_unix_file_flush_method=#  With which method to flush data\n\
+  --innodb_flush_method=#  With which method to flush data\n\
   --innodb_flush_log_at_trx_commit[=#]\n\
 			       Set to 0 if you don't want to flush logs\n\
   --innodb_log_arch_dir=dir    Where full logs should be archived\n\
@@ -3167,7 +3169,7 @@ static void get_options(int argc,char **argv)
   int c,option_index=0;
 
   myisam_delay_key_write=1;			// Allow use of this
-  while ((c=getopt_long(argc,argv,"ab:C:h:#::T::?l::L:O:P:sS::t:u:noVvI?",
+  while ((c=getopt_long(argc,argv,"ab:C:h:#::T::?l::L:O:P:sS::t:u:noVvWI?",
 			long_options, &option_index)) != EOF)
   {
     switch(c) {
@@ -3177,6 +3179,9 @@ static void get_options(int argc,char **argv)
 #endif
       opt_endinfo=1;				/* unireg: memory allocation */
       break;
+    case 'W':
+      opt_warnings=1;
+      break;
     case 'a':
       opt_ansi_mode=1;
       thd_startup_options|=OPTION_ANSI_MODE;

sql/sql_parse.cc

@@ -554,6 +554,7 @@ pthread_handler_decl(handle_one_connection,arg)
     free_root(&thd->mem_root,MYF(0));
     if (net->error && net->vio != 0)
     {
+      if (!thd->killed && ! opt_warnings)
       sql_print_error(ER(ER_NEW_ABORTING_CONNECTION),
 		      thd->thread_id,(thd->db ? thd->db : "unconnected"),
 		      thd->user ? thd->user : "unauthenticated",