fn get_encoding(
scx: &StatementContext<'_>,
format: &CreateSourceFormat<Aug>,
envelope: &SourceEnvelope
) -> Result<SourceDataEncoding<ReferencedConnection>, PlanError>
fn get_encoding(
scx: &StatementContext<'_>,
format: &CreateSourceFormat<Aug>,
envelope: &SourceEnvelope
) -> Result<SourceDataEncoding<ReferencedConnection>, PlanError>