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Handle trailing tbl column in TPCH benchmarks #4821

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merged 3 commits into from
Jan 5, 2023

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tustvold
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@tustvold tustvold commented Jan 4, 2023

Which issue does this PR close?

Closes #.

Rationale for this change

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?

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?

Are there any user-facing changes?

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@alamb alamb left a comment

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THank you @tustvold

@alamb alamb merged commit b410fce into apache:master Jan 5, 2023
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ursabot commented Jan 5, 2023

Benchmark runs are scheduled for baseline = 702e117 and contender = b410fce. b410fce is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ec2-t3-xlarge-us-east-2] ec2-t3-xlarge-us-east-2
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on test-mac-arm] test-mac-arm
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ursa-i9-9960x] ursa-i9-9960x
[Skipped ⚠️ Benchmarking of arrow-datafusion-commits is not supported on ursa-thinkcentre-m75q] ursa-thinkcentre-m75q
Buildkite builds:
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java

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3 participants