Add isoyear, milliseconds, microseconds and epoch

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/datetimeExpressions.scala

@@ -1998,6 +1998,7 @@ case class DatePart(field: Expression, source: Expression, child: Expression)
         case "CENTURY" | "CENTURIES" | "C" | "CENT" => Century(source)
         case "DECADE" | "DECADES" | "DEC" | "DECS" => Decade(source)
         case "YEAR" | "Y" | "YEARS" | "YR" | "YRS" => Year(source)
+        case "ISOYEAR" => IsoYear(source)
         case "QUARTER" | "QTR" => Quarter(source)
         case "MONTH" | "MON" | "MONS" | "MONTHS" => Month(source)
         case "WEEK" | "W" | "WEEKS" => WeekOfYear(source)
@@ -2009,6 +2010,11 @@ case class DatePart(field: Expression, source: Expression, child: Expression)
         case "HOUR" | "H" | "HOURS" | "HR" | "HRS" => Hour(source)
         case "MINUTE" | "M" | "MIN" | "MINS" | "MINUTES" => Minute(source)
         case "SECOND" | "S" | "SEC" | "SECONDS" | "SECS" => Second(source)
+        case "MILLISECONDS" | "MSEC" | "MSECS" | "MILLISECON" | "MSECONDS" | "MS" =>
+          Milliseconds(source)
+        case "MICROSECONDS" | "USEC" | "USECS" | "USECONDS" | "MICROSECON" | "US" =>
+          Microseconds(source)
+        case "EPOCH" => Epoch(source)
         case other =>
           throw new AnalysisException(s"Literals of type '$other' are currently not supported.")
       }})