metesynnada

Custom window frame logic (support `ROWS`, `RANGE`, `PRECEDING` and `FOLLOWING` for window functions)

4

****Which issue does this PR close?**** We offer a partial implementation of [windows with custom window frames](https://www.postgresql.org/docs/current/sql-expressions.html#SYNTAX-WINDOW-FUNCTIONS) and improve the situation on [#361](https://github.com/apache/arrow-datafusion/issues/361). As a team, this is our first...

Decimal128 support for statistical aggregations

2

**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** Inside `Accumulator` implementation of `VarianceAccumulator` (and many others like `CovarianceAccumulator`) `update_batch` method...

**Describe the bug** `PartialOrd` implementation of `ScalarValue` types gives `None` for different types and it is automatically cast to `false`. I think this is the wrong behavior and introduces silent...

Discovering the partition count in the subscripted topic

1

I try to discovery the partitions inside the topics I subscribed. Even if it looks simple, I could not manage it with this code ```rust #[test] fn test_partition() -> KafkaResult{...

Make all SchemaProvider trait APIs async

4

### Is your feature request related to a problem or challenge? Currently, only `table` API is async, but `register_table`, `deregister_table`, `table_names`, and `table_exist` can be also async. Also, most of...