GitHub user gengliangwang opened a pull request:
https://github.com/apache/spark/pull/22890
[SPARK-25883][SQL][Minor] Override method `prettyName` in
`from_avro`/`to_avro`
## What changes were proposed in this pull request?
Previously in from_avro/to_avro, we override the method `simpleString` and
`sql` for the string output. However, the override only affects the alias
naming:
```
Project [from_avro('col,
...
, (mode,PERMISSIVE)) AS from_avro(col, struct<col1:bigint,col2:double>,
Map(mode -> PERMISSIVE))#11]
```
It only makes the alias name quite long: `from_avro(col,
struct<col1:bigint,col2:double>, Map(mode -> PERMISSIVE))`).
We should follow `from_csv`/`from_json` here, to override the method
prettyName only, and we will get a clean alias name
```
... AS from_avro(col)#11
```
## How was this patch tested?
Manual check
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gengliangwang/spark revise_from_to_avro
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22890.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #22890
----
commit 0393510c2e06eb78d21e6113454047dba7316c6e
Author: Gengliang Wang <gengliang.wang@...>
Date: 2018-10-30T07:08:47Z
overriding prettyName
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