For partition columns that are generated columns, we are able to automatically generate partition filters when we see a data filter on its generating columns. Right now we automatically generate these for a small subset of possible generation expressions (defined here.)
We can add support for additional expressions. Here are the supported generation expressions in Delta.
A few specific expressions that would make sense to add include:
These are just a few, feel free to comment or create a new sub-issue for any additional expressions you think would be beneficial.