[
https://issues.apache.org/jira/browse/HIVE-25268?focusedWorklogId=612356&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-612356
]
ASF GitHub Bot logged work on HIVE-25268:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 20/Jun/21 06:52
Start Date: 20/Jun/21 06:52
Worklog Time Spent: 10m
Work Description: ashish-kumar-sharma commented on a change in pull
request #2409:
URL: https://github.com/apache/hive/pull/2409#discussion_r654886574
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFDateFormat.java
##########
@@ -85,21 +87,31 @@ public ObjectInspector initialize(ObjectInspector[]
arguments) throws UDFArgumen
String fmtStr = getConstantStringValue(arguments, 1);
if (fmtStr != null) {
try {
- formatter = new SimpleDateFormat(fmtStr);
-
formatter.setCalendar(DateTimeMath.getTimeZonedProlepticGregorianCalendar());
+ if (timeZone == null) {
+ timeZone = SessionState.get() == null ? new
HiveConf().getLocalTimeZone() : SessionState.get().getConf()
Review comment:
Combine redundant code at line 121.
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFDateFormat.java
##########
@@ -111,17 +123,18 @@ public Object evaluate(DeferredObject[] arguments) throws
HiveException {
// the function should support both short date and full timestamp format
// time part of the timestamp should not be skipped
Timestamp ts = getTimestampValue(arguments, 0, tsConverters);
+
if (ts == null) {
Date d = getDateValue(arguments, 0, dtInputTypes, dtConverters);
if (d == null) {
return null;
}
ts = Timestamp.ofEpochMilli(d.toEpochMilli(id), id);
}
-
-
- date.setTime(ts.toEpochMilli(id));
- String res = formatter.format(date);
+ Timestamp ts2 = TimestampTZUtil.convertTimestampToZone(ts, timeZone,
ZoneId.of("UTC"));
Review comment:
No need to convert first convert timeZone to UTC and UTC to timeZone.
Timestamp class internally use localDateTime which is timezone less and only
depict the timestamp.
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFDateFormat.java
##########
@@ -111,17 +123,18 @@ public Object evaluate(DeferredObject[] arguments) throws
HiveException {
// the function should support both short date and full timestamp format
// time part of the timestamp should not be skipped
Timestamp ts = getTimestampValue(arguments, 0, tsConverters);
+
if (ts == null) {
Date d = getDateValue(arguments, 0, dtInputTypes, dtConverters);
Review comment:
You can also remove this line because it is already taken care as part
of timestamp.
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFDateFormat.java
##########
@@ -111,17 +123,18 @@ public Object evaluate(DeferredObject[] arguments) throws
HiveException {
// the function should support both short date and full timestamp format
// time part of the timestamp should not be skipped
Timestamp ts = getTimestampValue(arguments, 0, tsConverters);
+
if (ts == null) {
Date d = getDateValue(arguments, 0, dtInputTypes, dtConverters);
if (d == null) {
return null;
}
ts = Timestamp.ofEpochMilli(d.toEpochMilli(id), id);
}
-
-
- date.setTime(ts.toEpochMilli(id));
- String res = formatter.format(date);
+ Timestamp ts2 = TimestampTZUtil.convertTimestampToZone(ts, timeZone,
ZoneId.of("UTC"));
+ Instant instant = Instant.ofEpochSecond(ts2.toEpochSecond(),
ts2.getNanos());
+ ZonedDateTime zonedDateTime = ZonedDateTime.ofInstant(instant,
ZoneOffset.UTC);
+ String res = formatter.format(zonedDateTime);
Review comment:
Instead use ts.format(formatter)
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Issue Time Tracking
-------------------
Worklog Id: (was: 612356)
Time Spent: 1.5h (was: 1h 20m)
> date_format udf doesn't work for dates prior to 1900 if the timezone is
> different from UTC
> ------------------------------------------------------------------------------------------
>
> Key: HIVE-25268
> URL: https://issues.apache.org/jira/browse/HIVE-25268
> Project: Hive
> Issue Type: Bug
> Components: UDF
> Affects Versions: 3.1.0, 3.1.1, 3.1.2, 4.0.0
> Reporter: Nikhil Gupta
> Assignee: Nikhil Gupta
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> *Hive 1.2.1*:
> {code:java}
> select date_format('1400-01-14 01:00:00', 'yyyy-MM-dd HH:mm:ss z');
> +--------------------------+--+
> | _c0 |
> +--------------------------+--+
> | 1400-01-14 01:00:00 ICT |
> +--------------------------+--+
> select date_format('1800-01-14 01:00:00', 'yyyy-MM-dd HH:mm:ss z');
> +--------------------------+--+
> | _c0 |
> +--------------------------+--+
> | 1800-01-14 01:00:00 ICT |
> +--------------------------+--+
> {code}
> *Hive 3.1, Hive 4.0:*
> {code:java}
> select date_format('1400-01-14 01:00:00', 'yyyy-MM-dd HH:mm:ss z');
> +--------------------------+
> | _c0 |
> +--------------------------+
> | 1400-01-06 01:17:56 ICT |
> +--------------------------+
> select date_format('1800-01-14 01:00:00', 'yyyy-MM-dd HH:mm:ss z');
> +--------------------------+
> | _c0 |
> +--------------------------+
> | 1800-01-14 01:17:56 ICT |
> +--------------------------+
> {code}
> VM timezone is set to 'Asia/Bangkok'
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