parquet: Add support for row group pruning on FixedSizeBinary

[progval]

Which issue does this PR close?

Closes #9645.

Rationale for this change

What changes are included in this PR?

Are these changes tested?

Yes

Are there any user-facing changes?

It should be invisible other than a performance improvement.

[alamb]

Thank you @progval -- as always this is looking quite good. However, I have a suggestion about data validation / error checking that i think is worth discussing prior to merge

[alamb]

Should we verify that the resulting bytes have the correct size? As in verify that *size is the same as (s.$bytes_func().to_vec().len()?

If not, I suggest we ignore the error (but don't use the statistics) the same way as is done for non UTF8 values i string statistics. Perhaps we can at least debug when this happens with debug!

Since this data can come from any arbitrary parquet writer, I think it is good practice to validate what is in there

[progval]

Oh sure, good catch.

The code for strings is:

let s = std::str::from_utf8(s.$bytes_func())
    .map(|s| s.to_string())
    .ok();
Some(ScalarValue::Utf8(s))

which looks like it's treated as a NULL, rather than ignored as a statistics value. Should I do the same here?

[alamb]

Yes, I think converting to NULL is the correct behavior. In this case that results in ignoring the value in terms of range analysis. More details are here if you are curious:

https://github.com/apache/arrow-datafusion/blob/8074ca1e758470319699a562074290906003b312/datafusion/core/src/physical_optimizer/pruning.rs#L85-L87

[progval]

I see, done. I also added a log statement for strings, for consistency.

[alamb]

LGTM -- thank you @progval