Dan Harris

**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** A clear and concise description of what the problem is. Ex. I'm...

**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** A clear and concise description of what the problem is. Ex. I'm...

Implement Avro codec

4

We need to implement two codecs for Avro: 1. An `AvroCodec` to serialize/deserialize the Avro binary serialization format 2. An `AvroSchemaCodec` to serialize a `Schema[A]` to an Avro JSON schema...

Allow using default values for migrations

4

Now that we can generate a default value for any schema, we should allow the use of default values to "fill out" schema migrations. For example, a migration from `case...

Currently if we have a nested `Optional` schema such as `Schema.Optional(Schema.Optional(Schema.primtive(StandardType.StringType))` we cannot distinguish between the JSONprotobuf encodings of `Some(None)` and `None` which will both be encoded to `null` in...

Add hook for sharing join state in distributed execution

8

## Which issue does this PR close? Closes #12454 ## Rationale for this change ## What changes are included in this PR? ## Are these changes tested? ## Are there...