tztime_to_sql: quote `Offset` field

mysql-test/main/mysql_tzinfo_to_sql_symlink.result

@@ -19,7 +19,7 @@ START TRANSACTION;
 INSERT INTO time_zone (Use_leap_seconds) VALUES ('N');
 SET @time_zone_id= LAST_INSERT_ID();
 INSERT INTO time_zone_name (Name, Time_zone_id) VALUES ('GMT', @time_zone_id);
-INSERT INTO time_zone_transition_type (Time_zone_id, Transition_type_id, Offset, Is_DST, Abbreviation) VALUES
+INSERT INTO time_zone_transition_type (Time_zone_id, Transition_type_id, `Offset`, Is_DST, Abbreviation) VALUES
  (@time_zone_id, 0, 0, 0, 'GMT')
 ;
 Warning: Unable to load 'MYSQLTEST_VARDIR/zoneinfo/garbage' as time zone. Skipping it.
@@ -27,7 +27,7 @@ Warning: Unable to load 'MYSQLTEST_VARDIR/zoneinfo/ignored.tab' as time zone. Sk
 INSERT INTO time_zone (Use_leap_seconds) VALUES ('N');
 SET @time_zone_id= LAST_INSERT_ID();
 INSERT INTO time_zone_name (Name, Time_zone_id) VALUES ('posix/GMT', @time_zone_id);
-INSERT INTO time_zone_transition_type (Time_zone_id, Transition_type_id, Offset, Is_DST, Abbreviation) VALUES
+INSERT INTO time_zone_transition_type (Time_zone_id, Transition_type_id, `Offset`, Is_DST, Abbreviation) VALUES
  (@time_zone_id, 0, 0, 0, 'GMT')
 ;
 Warning: Unable to load 'MYSQLTEST_VARDIR/zoneinfo/posix/garbage' as time zone. Skipping it.
@@ -63,14 +63,14 @@ START TRANSACTION;
 INSERT INTO time_zone (Use_leap_seconds) VALUES ('N');
 SET @time_zone_id= LAST_INSERT_ID();
 INSERT INTO time_zone_name (Name, Time_zone_id) VALUES ('GMT', @time_zone_id);
-INSERT INTO time_zone_transition_type (Time_zone_id, Transition_type_id, Offset, Is_DST, Abbreviation) VALUES
+INSERT INTO time_zone_transition_type (Time_zone_id, Transition_type_id, `Offset`, Is_DST, Abbreviation) VALUES
  (@time_zone_id, 0, 0, 0, 'GMT')
 ;
 Warning: Unable to load 'MYSQLTEST_VARDIR/zoneinfo/garbage' as time zone. Skipping it.
 INSERT INTO time_zone (Use_leap_seconds) VALUES ('N');
 SET @time_zone_id= LAST_INSERT_ID();
 INSERT INTO time_zone_name (Name, Time_zone_id) VALUES ('posix/GMT', @time_zone_id);
-INSERT INTO time_zone_transition_type (Time_zone_id, Transition_type_id, Offset, Is_DST, Abbreviation) VALUES
+INSERT INTO time_zone_transition_type (Time_zone_id, Transition_type_id, `Offset`, Is_DST, Abbreviation) VALUES
  (@time_zone_id, 0, 0, 0, 'GMT')
 ;
 Warning: Unable to load 'MYSQLTEST_VARDIR/zoneinfo/posix/garbage' as time zone. Skipping it.
@@ -101,7 +101,7 @@ END IF|
 INSERT INTO time_zone (Use_leap_seconds) VALUES ('N');
 SET @time_zone_id= LAST_INSERT_ID();
 INSERT INTO time_zone_name (Name, Time_zone_id) VALUES ('XXX', @time_zone_id);
-INSERT INTO time_zone_transition_type (Time_zone_id, Transition_type_id, Offset, Is_DST, Abbreviation) VALUES
+INSERT INTO time_zone_transition_type (Time_zone_id, Transition_type_id, `Offset`, Is_DST, Abbreviation) VALUES
  (@time_zone_id, 0, 0, 0, 'GMT')
 ;
 \d |

sql/tztime.cc

@@ -2417,7 +2417,7 @@ print_tz_as_sql(const char* tz_name, const TIME_ZONE_INFO *sp)
   }
 
   printf("INSERT INTO time_zone_transition_type \
-(Time_zone_id, Transition_type_id, Offset, Is_DST, Abbreviation) VALUES\n");
+(Time_zone_id, Transition_type_id, `Offset`, Is_DST, Abbreviation) VALUES\n");
 
   for (i= 0; i < sp->typecnt; i++)
     printf("%s(@time_zone_id, %u, %ld, %d, '%s')\n", (i == 0 ? " " : ","), i,