update

dbms/src/Common/MyDuration.cpp

@@ -67,10 +67,4 @@ String MyDuration::toString() const
     auto frac_str = fmt::format("{:06}", microsecond);
     return fmt::format(fmt_str, sign > 0 ? "" : "-", hour, minute, second, frac_str);
 }
-
-UInt64 calcSeconds(Int32 hour, Int32 minute, Int32 second)
-{
-    return hour * 3600 + minute * 60 + second;
-}
-
 } // namespace DB

dbms/src/Common/MyDuration.h

@@ -89,8 +89,4 @@ class MyDuration
 
     String toString() const;
 };
-
-// returns seconds since '00:00:00'
-UInt64 calcSeconds(Int32 hour, Int32 minute, Int32 second);
-
 } // namespace DB

dbms/src/Functions/FunctionsDuration.cpp

@@ -194,7 +194,7 @@ struct TiDBTimeToSecTransformerImpl
         {
             sign = -1;
         }
-        return sign * calcSeconds(val.hours(), val.minutes(), val.seconds());
+        return sign * (val.hours() * 3600 + val.minutes() * 60 + val.seconds());
     }
 };