[SPARK-25299] Non-resilient, external, multiple file-server implementation #11
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ifilonenko
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Oct 21, 2019
…/`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
Closes apache#22890 from gengliangwang/revise_from_to_avro.
Authored-by: Gengliang Wang <[email protected]>
Signed-off-by: gatorsmile <[email protected]>
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What changes were proposed in this pull request?
Adding an example implementation using multi-file servers.
How was this patch tested?
Unit and Integration tests