Dongjoon Hyun created SPARK-16983:
-------------------------------------
Summary: Add `prettyName` to row_number, dense_rank, percent_rank,
cume_dist
Key: SPARK-16983
URL: https://issues.apache.org/jira/browse/SPARK-16983
Project: Spark
Issue Type: Bug
Components: SQL
Reporter: Dongjoon Hyun
Priority: Minor
Currently, two-word window functions like `row_number`, `dense_rank`,
`percent_rank`, and `cume_dist` are expressed without `_`. We had better show
the correct name.
**Before**
{code}
scala> sql("select row_number()").show
java.lang.UnsupportedOperationException: Cannot evaluate expression: rownumber()
{code}
**After**
{code}
scala> sql("select row_number()").show
java.lang.UnsupportedOperationException: Cannot evaluate expression:
row_number()
{code}
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