Weston Pace created ARROW-12827:
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Summary: [C++] [Dataset] Review error pass-through in the datasets
API
Key: ARROW-12827
URL: https://issues.apache.org/jira/browse/ARROW-12827
Project: Apache Arrow
Issue Type: Improvement
Components: C++
Reporter: Weston Pace
There is at least one (and I think there are actually several) places in the
datasets API where we are bubbling up errors without attaching the necessary
context. For example, in the discussion here
[https://github.com/apache/arrow/pull/10326#pullrequestreview-662095548] a call
to "DatasetFactory::Create" (where the user incorrectly assigned a default file
format of parquet) is returning "Parquet magic bytes not found in footer"
instead of something like "Dataset creation failed. The fragment
'/2019/July/myfile.csv' did not match the expected 'parquet'' format: Parquet
magic bytes not found in footer"
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