[Feature Request] Support additional generation expressions for automatic data skipping

Overview

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.)

Details

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:

• Ceil: https://github.com/delta-io/delta/issues/1443
• Floor: https://github.com/delta-io/delta/issues/1444
• TruncDate: https://github.com/delta-io/delta/issues/1446
• TruncTimestamp: https://github.com/delta-io/delta/issues/1445

These are just a few, feel free to comment or create a new sub-issue for any additional expressions you think would be beneficial.

What to update?

• optimizablePartitionExpressions
• GeneratedColumn.getOptimizablePartitionExpressions
• OptimizeGeneratedColumnSuite