myui opened a new pull request #229:
URL: https://github.com/apache/incubator-hivemall/pull/229
## What changes were proposed in this pull request?
transpose_and_dot throws UDFArgumentException for 0 rows input.
```
WITH INPUT AS(
SELECT
ARRAY(1.0,2.0,3.0) AS X,
ARRAY(0,1) AS Y
)
SELECT
transpose_and_dot(Y,X) AS observed
FROM
INPUT
WHERE false
Caused by: org.apache.hadoop.hive.ql.metadata.HiveException:
org.apache.hadoop.hive.ql.exec.UDFArgumentException
at
org.apache.hadoop.hive.ql.exec.GroupByOperator.closeOp(GroupByOperator.java:1126)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:697)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:711)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:711)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:711)
at org.apache.hadoop.hive.ql.exec.Operator.close(Operator.java:711)
at
org.apache.hadoop.hive.ql.exec.tez.MapRecordProcessor.close(MapRecordProcessor.java:464)
... 15 more
Caused by: org.apache.hadoop.hive.ql.exec.UDFArgumentException
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at java.lang.Class.newInstance(Class.java:442)
at
hivemall.utils.lang.Preconditions.checkNotNull(Preconditions.java:43)
at
hivemall.tools.matrix.TransposeAndDotUDAF$TransposeAndDotUDAFEvaluator.iterate(TransposeAndDotUDAF.java:172)
at
org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.aggregate(GenericUDAFEvaluator.java:192)
at
org.apache.hadoop.hive.ql.exec.GroupByOperator.closeOp(GroupByOperator.java:1117)
... 21 more
```
## What type of PR is it?
Bug Fix
## What is the Jira issue?
https://issues.apache.org/jira/browse/HIVEMALL-295
## How was this patch tested?
manual tests on EMR
## Checklist
(Please remove this section if not needed; check `x` for YES, blank for NO)
- [x] Did you apply source code formatter, i.e., `./bin/format_code.sh`, for
your commit?
- [x] Did you run system tests on Hive (or Spark)?
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