(4.1 version, with post-review fixes)
The fix for another Bug (6439) limited FROM_UNIXTIME() to
TIMESTAMP_MAX_VALUE which is 2145916799 or 2037-12-01 23:59:59 GMT,
however unix timestamp in general is not considered to be limited
by this value. All dates up to power(2,31)-1 are valid.
This patch extends allowed TIMESTAMP range so, that max
TIMESTAMP value is power(2,31)-1. It also corrects
FROM_UNIXTIME() and UNIX_TIMESTAMP() functions, so that
max allowed UNIX_TIMESTAMP() is power(2,31)-1. FROM_UNIXTIME()
is fixed accordingly to allow conversion of dates up to
2038-01-19 03:14:07 UTC. The patch also fixes CONVERT_TZ()
function to allow extended range of dates.
The main problem solved in the patch is possible overflows
of variables, used in broken-time representation to time_t
conversion (required for UNIX_TIMESTAMP).
acinclude.m4:
Add new macro to check time_t range
configure.in:
Call the macro to check time_t range
include/my_time.h:
Move time-related defines to proper place.
Add a function to perform a rough check if
a TIMESTAMP value fits into the boundaries.
Note: it is defined as "static inline", as
otherwise libmysql won't compile (due to the
way how gcc handles "inline" directive).
mysql-test/r/func_time.result:
Update test result
mysql-test/r/timezone.result:
Update test result
mysql-test/r/timezone2.result:
Update test result
mysql-test/t/func_time.test:
Add test for Bug#9191 and update test to be consistent
with new TIMESTAMP boundaries
mysql-test/t/timezone.test:
Update old tests to be consistent
with new TIMESTAMP boundaries
mysql-test/t/timezone2.test:
Update tests for convert_tz to be consistent with new
TIMESTAMP boundaries
sql/item_timefunc.cc:
Fix convert_tz to allow dates from the new (extended)
TIMESTAMP range
sql/mysql_priv.h:
Move time handling defaults to my_time.h
sql-common/my_time.c:
Because of increased TIMESTAMP_MAX_VALUE overflows in my_system_gmt_sec()
became possible. Here we make it safe against the overflows by stepping
back from the boundary dates which are likely to trigger them.
sql/time.cc:
Update TIME_to_timestamp to allow conversion of
extended date range
sql/tztime.cc:
Fix new (4.1) implementation of broken-down time representation
to time_t conversion routine to avoid overflows during conversion
of boundary dates
mysql-test/r/timezone4.result:
New BitKeeper file ``mysql-test/r/timezone4.result''
mysql-test/t/timezone4-master.opt:
New BitKeeper file ``mysql-test/t/timezone4-master.opt''
mysql-test/t/timezone4.test:
New BitKeeper file ``mysql-test/t/timezone4.test''
