Pruning on binary partition columns not supported with Datafusion

[Blajda]

Environment

Delta-rs version: main

Binding: rust, datafusion

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Bug

What happened:
Datafusion uses min and max statistics to perform pruning. For partition columns we set the min and max equal to the partition value. The binary type does not support a natural order so operators such as <= and >= do not work.

What you expected to happen:
When pruning for binary partition we should just be able to use the equality operator = or !=