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This is an automatically generated e-mail. To reply, visit:
https://reviews.apache.org/r/71561/
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(Updated Oct. 7, 2019, 5:33 a.m.)


Review request for hive, Jesús Camacho Rodríguez, Zoltan Haindrich, and Vineet 
Garg.


Bugs: HIVE-22250
    https://issues.apache.org/jira/browse/HIVE-22250


Repository: hive-git


Description
-------

Describe function does not provide description for rank functions
=================================================================
The `DESCRIBE FUNCTION` command gets the description of a function from the 
`@Description` annotations `value` field. If an UDF is annotated with the 
`@WindowFunctionDescription` hive prints 
```
There is no documentation for function <function>
```
Even if the description is present in the `@WindowFunctionDescription` 
annotation.

This patch moves the `@WindowFunctionDescription.Description` field to a 
separate annotation and provide the `@Description` annotation if both 
annotations are missing.


Diffs (updated)
-----

  ql/src/java/org/apache/hadoop/hive/ql/exec/Registry.java fc2a0e1970 
  ql/src/java/org/apache/hadoop/hive/ql/exec/WindowFunctionDescription.java 
511d9641c3 
  ql/src/java/org/apache/hadoop/hive/ql/udf/UDFToBoolean.java a7f4bf1fcc 
  ql/src/java/org/apache/hadoop/hive/ql/udf/UDFToByte.java 8f4ec3b1ef 
  ql/src/java/org/apache/hadoop/hive/ql/udf/UDFToDouble.java 7a0145243d 
  ql/src/java/org/apache/hadoop/hive/ql/udf/UDFToFloat.java 451b45fbbc 
  ql/src/java/org/apache/hadoop/hive/ql/udf/UDFToInteger.java 4fe9c323cc 
  ql/src/java/org/apache/hadoop/hive/ql/udf/UDFToLong.java b31eeb08a0 
  ql/src/java/org/apache/hadoop/hive/ql/udf/UDFToShort.java 315789c1c1 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFBloomFilter.java 
a8bcc972bb 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFCumeDist.java 
70541fe565 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFDenseRank.java 
30bfd2bb8c 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFFirstValue.java 
b8b7d8e6da 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFLag.java 
e0edbb42af 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFLastValue.java 
dadec3b793 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFLead.java 
e678278b8b 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFNTile.java 
8b2812d5bc 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFPercentRank.java 
1a7c94431b 
  
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFPercentileCont.java
 e7e4fda6ea 
  
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFPercentileDisc.java
 d7c295cb11 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFRank.java 
a28def73a1 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFRowNumber.java 
41a3e582ec 
  
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFAssertTrueOOM.java 
c5c73835af 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFBucketNumber.java 
472cc85047 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFEpochMilli.java 
d8e822ae97 
  
ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFInBloomFilter.java 
733fe63e80 
  ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDFSurrogateKey.java 
1372b60724 
  ql/src/test/queries/clientpositive/desc_function.q d055d9ca03 
  ql/src/test/results/clientpositive/desc_function.q.out 1f804bba60 
  ql/src/test/results/clientpositive/udaf_percentile_cont.q.out a2dae4a06e 
  ql/src/test/results/clientpositive/udaf_percentile_disc.q.out 3ef0cf9874 
  ql/src/test/results/clientpositive/udf_bigint.q.out 5a7430e120 
  ql/src/test/results/clientpositive/udf_boolean.q.out 8d66d5c23d 
  ql/src/test/results/clientpositive/udf_double.q.out f34efcae8d 
  ql/src/test/results/clientpositive/udf_float.q.out d15132928d 
  ql/src/test/results/clientpositive/udf_int.q.out c954e58dcf 
  ql/src/test/results/clientpositive/udf_smallint.q.out 01d468215a 
  ql/src/test/results/clientpositive/udf_tinyint.q.out 50373c7783 


Diff: https://reviews.apache.org/r/71561/diff/5/

Changes: https://reviews.apache.org/r/71561/diff/4-5/


Testing
-------

Added test cases to `desc_function.q`:
```
DESCRIBE FUNCTION dense_rank;
DESCRIBE FUNCTION EXTENDED dense_rank;
```


Thanks,

Krisztian Kasa

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