Fixed problem with mysql prompt when server disconnect. (Bug 356)

Fixed problem with localtime -> gmt where some times resulted in
different (but correct) timestamps. Now MySQL should use the smallest
possible timestamp value in this case.  (Bug 316)

client/mysql.cc

@@ -40,7 +40,7 @@
 #include <signal.h>
 #include <violite.h>
 
-const char *VER= "12.20";
+const char *VER= "12.21";
 
 /* Don't try to make a nice table if the data is too big */
 #define MAX_COLUMN_LENGTH	     1024
@@ -2613,14 +2613,18 @@ static const char* construct_prompt()
 	add_int_to_prompt(++prompt_counter);
 	break;
       case 'v':
+	if (connected)
 	  processed_prompt.append(mysql_get_server_info(&mysql));
+	else
+	  processed_prompt.append("not_connected");
 	break;
       case 'd':
 	processed_prompt.append(current_db ? current_db : "(none)");
 	break;
       case 'h':
       {
-	const char *prompt=mysql_get_host_info(&mysql);
+	const char *prompt;
+	prompt= connected ? mysql_get_host_info(&mysql) : "not_connected";
 	if (strstr(prompt, "Localhost"))
 	  processed_prompt.append("localhost");
 	else
@@ -2631,8 +2635,13 @@ static const char* construct_prompt()
 	break;
       }
       case 'p':
-	if (strstr(mysql_get_host_info(&mysql),"TCP/IP") ||
-	    ! mysql.unix_socket)
+	if (!connected)
+	{
+	  processed_prompt.append("not_connected");
+	  break;
+	}
+	if (strstr(mysql_get_host_info(&mysql),"TCP/IP") || !
+	    mysql.unix_socket)
 	  add_int_to_prompt(mysql.port);
 	else
 	{

client/mysqltest.c

@@ -515,8 +515,12 @@ int dyn_string_cmp(DYNAMIC_STRING* ds, const char* fname)
 
   if (!my_stat(eval_file, &stat_info, MYF(MY_WME)))
     die(NullS);
-  if (!eval_result && stat_info.st_size != ds->length)
+  if (!eval_result && (uint) stat_info.st_size != ds->length)
+  {
+    DBUG_PRINT("info",("Size differs:  result size: %u  file size: %u",
+		       ds->length, stat_info.st_size));
     DBUG_RETURN(2);
+  }
   if (!(tmp = (char*) my_malloc(stat_info.st_size + 1, MYF(MY_WME))))
     die(NullS);
 

mysql-test/mysql-test-run.sh

@@ -13,7 +13,8 @@ DB=test
 DBPASSWD=
 VERBOSE=""
 USE_MANAGER=0
-TZ=GMT-3; export TZ # for UNIX_TIMESTAMP tests to work
+MY_TZ=GMT-3
+TZ=$MY_TZ; export TZ # for UNIX_TIMESTAMP tests to work
 
 #++
 # Program Definitions
@@ -1161,9 +1162,18 @@ run_testcase ()
    if [ -f $master_opt_file ] ;
    then
      EXTRA_MASTER_OPT=`$CAT $master_opt_file | $SED -e "s;\\$MYSQL_TEST_DIR;$MYSQL_TEST_DIR;"`
+     case "$EXTRA_MASTER_OPT" in
+       --timezone=*)
+	 TZ=`$ECHO "$EXTRA_MASTER_OPT" | $SED -e "s;--timezone=;;"`
+	 export TZ
+	 # Note that this must be set to space, not "" for test-reset to work
+	 EXTRA_MASTER_OPT=" "
+	 ;;
+     esac
      stop_master
      echo "CURRENT_TEST: $tname" >> $MASTER_MYERR
      start_master
+     TZ=$MY_TZ; export TZ
    else
      if [ ! -z "$EXTRA_MASTER_OPT" ] || [ x$MASTER_RUNNING != x1 ] || [ -f $master_init_script ]
      then

mysql-test/r/have_mest_timezone.require

+Variable_name	Value
+timezone	MEST

mysql-test/r/timezone.result

+DROP TABLE IF EXISTS t1;
+CREATE TABLE t1 (ts int);
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2002-10-27 01:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2002-10-27 02:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2002-10-27 03:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2002-10-27 02:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2002-10-27 01:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2002-10-27 02:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2003-03-30 02:59:59'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2003-03-30 03:00:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2003-03-30 03:59:59'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2003-03-30 04:00:01'));
+SELECT ts,from_unixtime(ts) FROM t1;
+ts	from_unixtime(ts)
+1035673200	2002-10-27 01:00:00
+1035680400	2002-10-27 02:00:00
+1035684000	2002-10-27 03:00:00
+1035680400	2002-10-27 02:00:00
+1035673200	2002-10-27 01:00:00
+1035680400	2002-10-27 02:00:00
+1048986000	2003-03-30 03:00:00
+1048986000	2003-03-30 03:00:00
+1048989599	2003-03-30 03:59:59
+1048989601	2003-03-30 04:00:01
+DROP TABLE t1;

mysql-test/t/raid.test

 -- require r/have_raid.require
+disable_query_log;
 show variables like "have_raid";
+enable_query_log;
 
 #
 # Test of raided tables

mysql-test/t/timezone-master.opt

+--timezone=MET

mysql-test/t/timezone.test

+#
+# Test of timezone handling.  This script must be run with TZ=MEST
+
+-- require r/have_mest_timezone.require
+disable_query_log;
+show variables like "timezone";
+enable_query_log;
+
+# Initialization
+--disable_warnings
+DROP TABLE IF EXISTS t1;
+--enable_warnings
+
+
+CREATE TABLE t1 (ts int);
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2002-10-27 01:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2002-10-27 02:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2002-10-27 03:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2002-10-27 02:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2002-10-27 01:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2002-10-27 02:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2003-03-30 02:59:59'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2003-03-30 03:00:00'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2003-03-30 03:59:59'));
+INSERT INTO t1 (ts) VALUES (Unix_timestamp('2003-03-30 04:00:01'));
+
+SELECT ts,from_unixtime(ts) FROM t1;
+DROP TABLE t1;

sql/field.cc

@@ -2552,6 +2552,7 @@ void Field_timestamp::store(longlong nr)
 
   if ((nr=fix_datetime(nr)))
   {
+    long not_used;
     part1=(long) (nr/LL(1000000));
     part2=(long) (nr - (longlong) part1*LL(1000000));
     l_time.year=  (int) (part1/10000L);  part1%=10000L;
@@ -2560,7 +2561,7 @@ void Field_timestamp::store(longlong nr)
     l_time.hour=  (int) (part2/10000L);  part2%=10000L;
     l_time.minute=(int) part2 / 100;
     l_time.second=(int) part2 % 100; 
-    timestamp=my_gmt_sec(&l_time);
+    timestamp=my_gmt_sec(&l_time, &not_used);
   }
   else
     timestamp=0;

sql/mysql_priv.h

@@ -755,7 +755,7 @@ uint calc_days_in_year(uint year);
 void get_date_from_daynr(long daynr,uint *year, uint *month,
 			 uint *day);
 void init_time(void);
-long my_gmt_sec(TIME *);
+long my_gmt_sec(TIME *, long *current_timezone);
 time_t str_to_timestamp(const char *str,uint length);
 bool str_to_time(const char *str,uint length,TIME *l_time);
 longlong str_to_datetime(const char *str,uint length,bool fuzzy_date);

sql/mysqld.cc

@@ -968,7 +968,6 @@ static void clean_up_mutexes()
   (void) pthread_mutex_destroy(&LOCK_crypt);
   (void) pthread_mutex_destroy(&LOCK_bytes_sent);
   (void) pthread_mutex_destroy(&LOCK_bytes_received);
-  (void) pthread_mutex_destroy(&LOCK_timezone);
   (void) pthread_mutex_destroy(&LOCK_user_conn);
   (void) pthread_mutex_destroy(&LOCK_rpl_status);
   (void) pthread_mutex_destroy(&LOCK_active_mi);
@@ -1998,19 +1997,11 @@ int main(int argc, char **argv)
   }
 #endif
 #ifdef HAVE_TZNAME
-#if defined(HAVE_LOCALTIME_R) && defined(_REENTRANT)
   {
     struct tm tm_tmp;
     localtime_r(&start_time,&tm_tmp);
     strmov(time_zone,tzname[tm_tmp.tm_isdst != 0 ? 1 : 0]);
   }
-#else
-  {
-    struct tm *start_tm;
-    start_tm=localtime(&start_time);
-    strmov(time_zone,tzname[start_tm->tm_isdst != 0 ? 1 : 0]);
-  }
-#endif
 #endif
 
   if (gethostname(glob_hostname,sizeof(glob_hostname)-4) < 0)
@@ -2067,7 +2058,6 @@ int main(int argc, char **argv)
   (void) pthread_mutex_init(&LOCK_crypt,MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_bytes_sent,MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_bytes_received,MY_MUTEX_INIT_FAST);
-  (void) pthread_mutex_init(&LOCK_timezone,MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_user_conn, MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_rpl_status, MY_MUTEX_INIT_FAST);
   (void) pthread_mutex_init(&LOCK_active_mi, MY_MUTEX_INIT_FAST);

sql/time.cc

@@ -28,7 +28,6 @@ uchar *days_in_month= (uchar*) "\037\034\037\036\037\036\037\037\036\037\036\037
 	/* Currently only my_time_zone is inited */
 
 static long my_time_zone=0;
-pthread_mutex_t LOCK_timezone;
 
 void init_time(void)
 {
@@ -39,14 +38,14 @@ void init_time(void)
   seconds= (time_t) time((time_t*) 0);
   localtime_r(&seconds,&tm_tmp);
   l_time= &tm_tmp;
-  my_time_zone=0;
+  my_time_zone=		3600;		/* Comp. for -3600 in my_gmt_sec */
   my_time.year=		(uint) l_time->tm_year+1900;
   my_time.month=	(uint) l_time->tm_mon+1;
   my_time.day=		(uint) l_time->tm_mday;
   my_time.hour=		(uint) l_time->tm_hour;
   my_time.minute=	(uint) l_time->tm_min;
   my_time.second=	(uint) l_time->tm_sec;
-  VOID(my_gmt_sec(&my_time));		/* Init my_time_zone */
+  my_gmt_sec(&my_time, &my_time_zone);	/* Init my_time_zone */
 }
 
 /*
@@ -57,26 +56,39 @@ void init_time(void)
 
 */
 
-long my_gmt_sec(TIME *t)
+long my_gmt_sec(TIME *t, long *my_timezone)
 {
   uint loop;
   time_t tmp;
   struct tm *l_time,tm_tmp;
-  long diff;
+  long diff, current_timezone;
 
   if (t->hour >= 24)
   {					/* Fix for time-loop */
     t->day+=t->hour/24;
     t->hour%=24;
   }
-  pthread_mutex_lock(&LOCK_timezone);
-  tmp=(time_t) ((calc_daynr((uint) t->year,(uint) t->month,(uint) t->day) -
+
+  /*
+    Calculate the gmt time based on current time and timezone
+    The -1 on the end is to ensure that if have a date that exists twice
+    (like 2002-10-27 02:00:0 MET), we will find the initial date.
+
+    By doing -3600 we will have to call localtime_r() several times, but
+    I couldn't come up with a better way to get a repeatable result :(
+
+    We can't use mktime() as it's buggy on many platforms and not thread safe.
+  */
+  tmp=(time_t) (((calc_daynr((uint) t->year,(uint) t->month,(uint) t->day) -
 		  (long) days_at_timestart)*86400L + (long) t->hour*3600L +
-		(long) (t->minute*60 + t->second)) + (time_t) my_time_zone;
+		 (long) (t->minute*60 + t->second)) + (time_t) my_time_zone -
+		3600);
+  current_timezone= my_time_zone;
+
   localtime_r(&tmp,&tm_tmp);
   l_time=&tm_tmp;
   for (loop=0;
-       loop < 3 &&
+       loop < 2 &&
 	 (t->hour != (uint) l_time->tm_hour ||
 	  t->minute != (uint) l_time->tm_min);
        loop++)
@@ -89,14 +101,16 @@ long my_gmt_sec(TIME *t)
       days= -1;
     diff=(3600L*(long) (days*24+((int) t->hour - (int) l_time->tm_hour)) +
 	  (long) (60*((int) t->minute - (int) l_time->tm_min)));
-    my_time_zone+=diff;
-    tmp+=(time_t) diff;
+    current_timezone+= diff+3600;		// Compensate for -3600 above
+    tmp+= (time_t) diff;
     localtime_r(&tmp,&tm_tmp);
     l_time=&tm_tmp;
   }
-  /* Fix that if we are in the not existing daylight saving time hour
-     we move the start of the next real hour */
-  if (loop == 3 && t->hour != (uint) l_time->tm_hour)
+  /*
+    Fix that if we are in the not existing daylight saving time hour
+    we move the start of the next real hour
+  */
+  if (loop == 2 && t->hour != (uint) l_time->tm_hour)
   {
     int days= t->day - l_time->tm_mday;
     if (days < -1)
@@ -108,11 +122,9 @@ long my_gmt_sec(TIME *t)
     if (diff == 3600)
       tmp+=3600 - t->minute*60 - t->second;	// Move to next hour
     else if (diff == -3600)
-      tmp-=t->minute*60 + t->second;		// Move to next hour
+      tmp-=t->minute*60 + t->second;		// Move to previous hour
   }
-  if ((my_time_zone >=0 ? my_time_zone: -my_time_zone) > 3600L*12)
-    my_time_zone=0;			/* Wrong date */
-  pthread_mutex_unlock(&LOCK_timezone);
+  *my_timezone= current_timezone;
   return (long) tmp;
 } /* my_gmt_sec */
 
@@ -399,6 +411,8 @@ str_to_TIME(const char *str, uint length, TIME *l_time,bool fuzzy_date)
 time_t str_to_timestamp(const char *str,uint length)
 {
   TIME l_time;
+  long not_used;
+
   if (str_to_TIME(str,length,&l_time,0) == TIMESTAMP_NONE)
     return(0);
   if (l_time.year >= TIMESTAMP_MAX_YEAR || l_time.year < 1900+YY_PART_YEAR)
@@ -406,7 +420,7 @@ time_t str_to_timestamp(const char *str,uint length)
     current_thd->cuted_fields++;
     return(0);
   }
-  return(my_gmt_sec(&l_time));
+  return(my_gmt_sec(&l_time, &not_used));
 }