tustvold opened a new pull request, #4821:
URL: https://github.com/apache/arrow-datafusion/pull/4821
# Which issue does this PR close?
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Closes #.
# Rationale for this change
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The tbl format is of the form
```
a|b|c|
```
Note the trailing `|`. Interpreting this as CSV therefore adds an additional
trailing column, currently the CSV reader just ignores this. However, with
arrow 30 the reader now complains if you give it a schema that doesn't match
the file. The changes in this PR work around this
# What changes are included in this PR?
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Adds an additional `__placeholder` column to the schema when reading from a
tbl file, this can then be projected out. This was a quick way to workaround
this issue without polluting the general codebase with support for what appears
to be a TPCH specific data format?
# Are these changes tested?
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# Are there any user-facing changes?
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