The Parquet Spec doesn't specify whether multiple columns are allowed to have the same name.

The parquet format specification doesn't say whether a Parquet file having columns with the same name (in the same group node, so really exactly the same name) is valid. I.e., say I have a Parquet file with two columns. Both are called x. Is this file a valid Parquet file?

**Reporter**: [Jan Finis](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=jfinis) / @jfinis

_{**Note**: *This issue was originally created as [PARQUET-2345](https://issues.apache.org/jira/browse/PARQUET-2345). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}

Start by reading the Parquet format specification and the existing issue discussion for schema rules around column names. Resolve whether duplicate names within one group node are valid, then make the specification state the decision and its rationale explicitly; done means the validity question is unambiguous.

Written by the indexing model from the issue text.