Github user vdiravka commented on a diff in the pull request:
https://github.com/apache/drill/pull/600#discussion_r83853471
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/store/parquet/ParquetReaderUtility.java
---
@@ -45,4 +53,34 @@ public static int getIntFromLEBytes(byte[] input, int
start) {
}
return out;
}
+
+ /**
+ * Utilities for converting from parquet INT96 binary (impala, hive
timestamp)
+ * to date time value. This utilizes the Joda library.
+ */
+ public static class NanoTimeUtils {
+
+ public static final long NANOS_PER_DAY = TimeUnit.DAYS.toNanos(1);
+ public static final long NANOS_PER_HOUR = TimeUnit.HOURS.toNanos(1);
+ public static final long NANOS_PER_MINUTE =
TimeUnit.MINUTES.toNanos(1);
+ public static final long NANOS_PER_SECOND =
TimeUnit.SECONDS.toNanos(1);
+ public static final long NANOS_PER_MILLISECOND =
TimeUnit.MILLISECONDS.toNanos(1);
+
+ /**
+ * @param binaryTimeStampValue
+ * hive, impala timestamp values with nanoseconds precision
+ * are stored in parquet Binary as INT96
+ *
+ * @return the number of milliseconds since January 1, 1970, 00:00:00
GMT
+ * represented by @param binaryTimeStampValue .
+ */
+ public static long getDateTimeValueFromBinary(Binary
binaryTimeStampValue) {
+ NanoTime nt = NanoTime.fromBinary(binaryTimeStampValue);
+ int julianDay = nt.getJulianDay();
+ long nanosOfDay = nt.getTimeOfDayNanos();
+ return DateTimeUtils.fromJulianDay(julianDay-0.5d) +
nanosOfDay/NANOS_PER_MILLISECOND;
--- End diff --
The comment is removed. And numbers are replaced with constants from
ParquetReaderUtility and DateTimeConstants.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
