[Rust] [DataFusion] Some examples are broken

[asfimport]

The flight server example fails with "No such file or directory".

The dataframe example produces an empty result set.

The simple_udaf example produces no output at all.

Reporter: Andy Grove / @andygrove
Assignee: Jorge Leitão / @jorgecarleitao

PRs and other links:

• GitHub Pull Request #8355

_{Note: This issue was originally created as ARROW-10188. Please see the migration documentation for further details.}

[asfimport]

Jorge Leitão / @jorgecarleitao:
I was unable to reproduce the first one:

 

On one shell:

export PARQUET_TEST_DATA=../../cpp/submodules/parquet-testing/data

cargo run --example flight_server

 

On a second shell:

export PARQUET_TEST_DATA=../../cpp/submodules/parquet-testing/data

cargo run --example flight_client

works as intended in my computer.  @andygrove, could you describe how you ran it in yours?

 

I will work the other two.

[asfimport]

Andy Grove / @andygrove:
Thanks @jorgecarleitao .. my mistake, I had set the PARQUET_TEST_DATA path relative to the wrong directory in the terminal window where I was running the client. The flight example works for me now.

[asfimport]

Andy Grove / @andygrove:
Issue resolved by pull request 8355
#8355