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                                            Jay Han

Is there any actual conversion implementation for arrow and parquet?

It seems that iceberg has an arrow implementation.

Is there any actual conversion implementation for arrow and parquet?

I've ported Iceberg's implementation to [parquet-arrow](https://github.com/doki23/parquet-arrow) and removed the concepts specific to Iceberg. If someone is interested in this, they are welcome to make contributions.

Incorrect LEFT JOIN evaluation result on OR conditions

The doc of `push_down_filter` says: ``` /// For a given JOIN type, determine whether each side of the join is preserved. /// /// We say a join side is preserved...