GenericWriter doesn't support maps

[Pryz]

The current implementation of the GenericWriter doesn't support the usage of maps within a schema.

Example:

type Span struct {
  ...
  Attributes map[string]json.RawMesssage
}

will panic with panic: cannot convert Go values of type map[string]json.RawMessage to parquet value

[achille-roussel]

Do you have a code snippet and full stack trace to share?

[Pryz]

Opened https://github.com/segmentio/parquet-go/pull/313 turns out the issue was not what I was thinking about.