[parquet-cli] Illegal character in column name

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#3,364 opened on Dec 2, 2025 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 4/5
Estimated time: 3-5 days
Newbie friendliness: 38/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Stale
Tech stack: java
Domain: cli

Research direction

Start at the parquet cat CLI path and reproduce the failure with a Parquet file containing the Creation-Time column name. Trace where column names are validated, then determine how an opt-in allowance would affect the command. Done means parquet cat can process this column name without the Illegal character error while preserving existing validation behavior.

Written by the indexing model from the issue text.

Description

Type: bug

Describe the bug, including details regarding any error messages, version, and platform.

I have a Parquet file with a column that contains a hyphen character and get the following error:

Illegal character in: Creation-Time

I guess Parquet officially supports only alphanumeric plus underscore, but I have retrieved this Parquet file from a blob inventory scan on Azure.

Might there be an option to allow such a column name in parquet cat for example?

Component(s)

CLI

Dominant language: Java
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Merged PRs (30d): 28

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