From: Georgi Kodinov Date: December 1 2008 2:19pm Subject: bzr commit into mysql-5.0-bugteam branch (kgeorge:2717) Bug#39920 List-Archive: http://lists.mysql.com/commits/60278 X-Bug: 39920 Message-Id: <200812011419.mB1EJCQG007258@magare.gmz> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit #At file:///home/kgeorge/mysql/work/B39920-5.0-bugteam/ based on revid:gshchepa@stripped 2717 Georgi Kodinov 2008-12-01 Bug #39920: MySQL cannot deal with Leap Second expression in string literal. Updated MySQL time handling code to react correctly on UTC leap second additions. MySQL functions that return the OS current time, like e.g. CURDATE(), NOW() etc will return :59:59 instead of :59:60 or 59:61. As a result the reader will receive :59:59 for 2 or 3 consecutive seconds during the leap second. This fix will not affect the values returned by UNIX_TIMESTAMP() for leap seconds. But note that when converting the value returned by UNIX_TIMESTAMP() to broken down time the correction of leap seconds will still be applied. Note that this fix will make a difference *only* if the OS is specially configured to return leap seconds from the OS time calls or when using a MySQL time zone defintion that has leap seconds. Even after this change date/time literals (or other broken down time representations) with leap seconds (ending on :59:60 or 59:61) will still be considered illegal and discarded by the server with an error or a warning depending on the sql mode. Added a test case to demonstrate the effect of the fix. modified: mysql-test/r/timezone3.result mysql-test/std_data/Moscow_leap mysql-test/t/timezone3.test sql/tztime.cc sql/tztime.h per-file messages: mysql-test/r/timezone3.result Bug #39920: test case mysql-test/std_data/Moscow_leap Bug #39920: updated the Moscow time zone to Dr. Olson's tzdata 2008i to accomodate for the 2008 leap second mysql-test/t/timezone3.test Bug #39920: test case sql/tztime.cc Bug #39920: adjust leap seconds (:60 or :61) to :59 sql/tztime.h Bug #39920: adjust leap seconds (:60 or :61) to :59 === modified file 'mysql-test/r/timezone3.result' --- a/mysql-test/r/timezone3.result 2004-11-12 15:44:17 +0000 +++ b/mysql-test/r/timezone3.result 2008-12-01 14:18:35 +0000 @@ -17,6 +17,9 @@ insert into t1 values insert into t1 values (unix_timestamp('1981-07-01 03:59:59'),'1981-07-01 03:59:59'), (unix_timestamp('1981-07-01 04:00:00'),'1981-07-01 04:00:00'); +insert into t1 values +(unix_timestamp('2009-01-01 02:59:59'),'2009-01-01 02:59:59'), +(unix_timestamp('2009-01-01 03:00:00'),'2009-01-01 03:00:00'); select i, from_unixtime(i), c from t1; i from_unixtime(i) c 1072904422 2004-01-01 00:00:00 2004-01-01 00:00:00 @@ -31,6 +34,8 @@ i from_unixtime(i) c 1099180821 2004-10-31 02:59:59 2004-10-31 02:59:59 362793608 1981-07-01 03:59:59 1981-07-01 03:59:59 362793610 1981-07-01 04:00:00 1981-07-01 04:00:00 +1230768022 2009-01-01 02:59:59 2009-01-01 02:59:59 +1230768024 2009-01-01 03:00:00 2009-01-01 03:00:00 drop table t1; create table t1 (ts timestamp); insert into t1 values (19730101235900), (20040101235900); @@ -39,3 +44,6 @@ ts 1973-01-01 23:59:00 2004-01-01 23:59:00 drop table t1; +SELECT FROM_UNIXTIME(1230768022), FROM_UNIXTIME(1230768023), FROM_UNIXTIME(1230768024); +FROM_UNIXTIME(1230768022) FROM_UNIXTIME(1230768023) FROM_UNIXTIME(1230768024) +2009-01-01 02:59:59 2009-01-01 02:59:59 2009-01-01 03:00:00 === modified file 'mysql-test/std_data/Moscow_leap' Binary files a/mysql-test/std_data/Moscow_leap 2004-11-03 17:59:03 +0000 and b/mysql-test/std_data/Moscow_leap 2008-12-01 14:18:35 +0000 differ === modified file 'mysql-test/t/timezone3.test' --- a/mysql-test/t/timezone3.test 2005-07-28 00:22:47 +0000 +++ b/mysql-test/t/timezone3.test 2008-12-01 14:18:35 +0000 @@ -45,6 +45,10 @@ insert into t1 values (unix_timestamp('1981-07-01 03:59:59'),'1981-07-01 03:59:59'), (unix_timestamp('1981-07-01 04:00:00'),'1981-07-01 04:00:00'); +insert into t1 values + (unix_timestamp('2009-01-01 02:59:59'),'2009-01-01 02:59:59'), + (unix_timestamp('2009-01-01 03:00:00'),'2009-01-01 03:00:00'); + select i, from_unixtime(i), c from t1; drop table t1; @@ -58,4 +62,12 @@ insert into t1 values (19730101235900), select * from t1; drop table t1; +# +# Test Bug #39920: MySQL cannot deal with Leap Second expression in string +# literal +# + +# 2009-01-01 02:59:59, 2009-01-01 02:59:60 and 2009-01-01 03:00:00 +SELECT FROM_UNIXTIME(1230768022), FROM_UNIXTIME(1230768023), FROM_UNIXTIME(1230768024); + # End of 4.1 tests === modified file 'sql/tztime.cc' --- a/sql/tztime.cc 2008-04-03 17:19:55 +0000 +++ b/sql/tztime.cc 2008-12-01 14:18:35 +0000 @@ -1073,6 +1073,7 @@ Time_zone_system::gmt_sec_to_TIME(MYSQL_ localtime_r(&tmp_t, &tmp_tm); localtime_to_TIME(tmp, &tmp_tm); tmp->time_type= MYSQL_TIMESTAMP_DATETIME; + adjust_leap_second(tmp); } @@ -1157,6 +1158,7 @@ Time_zone_utc::gmt_sec_to_TIME(MYSQL_TIM gmtime_r(&tmp_t, &tmp_tm); localtime_to_TIME(tmp, &tmp_tm); tmp->time_type= MYSQL_TIMESTAMP_DATETIME; + adjust_leap_second(tmp); } @@ -1260,6 +1262,7 @@ void Time_zone_db::gmt_sec_to_TIME(MYSQL_TIME *tmp, my_time_t t) const { ::gmt_sec_to_TIME(tmp, t, tz_info); + adjust_leap_second(tmp); } @@ -2373,6 +2376,25 @@ Time_zone *my_tz_find_with_opening_tz_ta DBUG_RETURN(tz); } + +/** + Convert leap seconds into non-leap + + This function will convert the leap seconds added by the OS to + non-leap seconds, e.g. 23:59:59, 23:59:60 -> 23:59:59, 00:00:01 ... + This check is not checking for years on purpose : although it's not a + complete check this way it doesn't require looking (and having installed) + the leap seconds table. + + @param[in,out] broken down time structure as filled in by the OS +*/ + +void Time_zone::adjust_leap_second(MYSQL_TIME *t) +{ + if (t->second == 60 || t->second == 61) + t->second= 59; +} + #endif /* !defined(TESTTIME) && !defined(TZINFO2SQL) */ === modified file 'sql/tztime.h' --- a/sql/tztime.h 2007-05-16 08:44:59 +0000 +++ b/sql/tztime.h 2008-12-01 14:18:35 +0000 @@ -55,6 +55,9 @@ public: allocated on MEM_ROOT and should not require destruction. */ virtual ~Time_zone() {}; + +protected: + static inline void adjust_leap_second(MYSQL_TIME *t); }; extern Time_zone * my_tz_UTC;