Allow dates beyond 2038

Author: dveeden

include/my_time.h

@@ -31,23 +31,25 @@ extern const char my_zero_datetime6[]; /* "0000-00-00 00:00:00.000000" */
 
 /*
   Portable time_t replacement.
-  Should be signed and hold seconds for 1902 -- 2038-01-19 range
-  i.e at least a 32bit variable
+  Should be signed and hold seconds for 1902 -- 9999 range
+  i.e at least a 64bit variable
 
   Using the system built in time_t is not an option as
   we rely on the above requirements in the time functions
 */
-typedef long my_time_t;
+typedef long long my_time_t;
 
 typedef enum enum_mysql_timestamp_type timestamp_type;
 
 #define MY_TIME_T_MAX LONG_MAX
 #define MY_TIME_T_MIN LONG_MIN
 
 /* Time handling defaults */
-#define TIMESTAMP_MAX_YEAR 2038
+#define TIMESTAMP_MAX_YEAR 9999
 #define TIMESTAMP_MIN_YEAR (1900 + YY_PART_YEAR - 1)
-#define TIMESTAMP_MAX_VALUE INT_MAX32
+
+/* 253202544000 = (9999 - 1970) * 365 * 24 * 60 * 60 */
+#define TIMESTAMP_MAX_VALUE 253202544000
 #define TIMESTAMP_MIN_VALUE 1
 
 /* two-digit years < this are 20..; >= this are 19.. */

sql/tztime.cc

@@ -2422,7 +2422,7 @@ print_tz_as_sql(const char* tz_name, const TIME_ZONE_INFO *sp)
     printf("INSERT INTO time_zone_transition \
 (Time_zone_id, Transition_time, Transition_type_id) VALUES\n");
     for (i= 0; i < sp->timecnt; i++)
-      printf("%s(@time_zone_id, %ld, %u)\n", (i == 0 ? " " : ","), sp->ats[i],
+      printf("%s(@time_zone_id, %lld, %u)\n", (i == 0 ? " " : ","), sp->ats[i],
              (uint)sp->types[i]);
     printf(";\n");
   }
@@ -2467,7 +2467,7 @@ print_tz_leaps_as_sql(const TIME_ZONE_INFO *sp)
     printf("INSERT INTO time_zone_leap_second \
 (Transition_time, Correction) VALUES\n");
     for (i= 0; i < sp->leapcnt; i++)
-      printf("%s(%ld, %ld)\n", (i == 0 ? " " : ","),
+      printf("%s(%lld, %ld)\n", (i == 0 ? " " : ","),
              sp->lsis[i].ls_trans, sp->lsis[i].ls_corr);
     printf(";\n");
   }