Fix for bug #2523 '"func_time" test fails on QNX'.

Moved all range checks for TIMESTAMP value to my_gmt_sec().
Also fixed check of upper boundary of TIMESTAMP range (which 
also now will catch datetime values which are too small for
TIMESTAMP in case if time_t is unsigned).  


mysql-test/r/timezone.result:
  Added test which checks if TIMESTAMP range is checked 
  correctly (current time zone is honoured and both upper 
  and lower bounds of TIMESTAMP range are checked).
mysql-test/t/timezone.test:
  Added test which checks if TIMESTAMP range is checked 
  correctly (current time zone is honoured and both upper 
  and lower bounds of TIMESTAMP range are checked).
sql/field.cc:
  Check if datetime value is in TIMESTAMP range has moved to 
  my_gmt_sec() function.
sql/mysql_priv.h:
  Added more constants for checking if datetime is in allowed
  range for TIMESTAMP.
sql/time.cc:
  Check if datetime value is in TIMESTAMP range has moved to 
  my_gmt_sec() function. Fixed check of its return value
  to catch overflows in both directions and also overflows in 
  case of unsigned time_t.

1 files changed, 7 insertions, 0 deletions

diff --git a/mysql-test/t/timezone.test b/mysql-test/t/timezone.test
index ab732c11a34..ba65eb72fe6 100644
--- a/mysql-test/t/timezone.test
+++ b/mysql-test/t/timezone.test
@@ -38,3 +38,10 @@ INSERT INTO t1 (ts) VALUES (Unix_timestamp('2003-03-30 04:00:01'));
 SELECT ts,from_unixtime(ts) FROM t1;
 DROP TABLE t1;
 
+#
+# Test for fix for Bug#2523
+#
+select unix_timestamp('1970-01-01 01:00:00'), 
+       unix_timestamp('1970-01-01 01:00:01'),
+       unix_timestamp('2038-01-01 00:59:59'),
+       unix_timestamp('2038-01-01 01:00:00');