Transformation details in column lineage always appear as null

[irua84]

Hi,

We notice that, although, the JSON OpenLineage file has transformation information (type, subtype and some fields also description), in Marquez the transformation type and description always is null.

Let see the following example:

"outputs": [

    {
        "namespace": "bookstore2",
        "name": "customers_concat",
        "facets": {
            "columnLineage": {
                "_producer": "https://github.com/OpenLineage/OpenLineage/blob/v1-0-0/client",
                "_schemaURL": "https://openlineage.io/spec/facets/1-2-0/ColumnLineageDatasetFacet.json#/$defs/ColumnLineageDatasetFacet",
                "fields": {
                    "id": {
                        "inputFields": [
                            {
                                "namespace": "bookstore2",
                                "name": "customers",
                                "field": "id",
                                "transformations": [
                                    {
                                        "type": "DIRECT",
                                        "subtype": "IDENTITY"
                                    }
                                ]
                            }
                        ]
                    },
                    "customer_email": {
                        "inputFields": [
                            {
                                "namespace": "bookstore2",
                                "name": "customers",
                                "field": "customer_email",
                                "transformations": [
                                    {
                                        "type": "DIRECT",
                                        "subtype": "IDENTITY"
                                    }
                                ]
                            }
                        ]
                    },
                    "customer_full": {
                        "inputFields": [
                            {
                                "namespace": "bookstore2",
                                "name": "customers",
                                "field": "customer_email",
                                "transformations": [
                                    {
                                        "type": "DIRECT",
                                        "subtype": "TRANSFORMATION",
                                        "description": "concat(customers.customer_name, ' - ', customers.customer_email)"
                                    }
                                ]
                            },
                            {
                                "namespace": "bookstore2",
                                "name": "customers",
                                "field": "customer_name",
                                "transformations": [
                                    {
                                        "type": "DIRECT",
                                        "subtype": "TRANSFORMATION",
                                        "description": "concat(customers.customer_name, ' - ', customers.customer_email)"
                                    }
                                ]
                            }
                        ]
                    },
                    "customer_name": {
                        "inputFields": [
                            {
                                "namespace": "bookstore2",
                                "name": "customers",
                                "field": "customer_name",
                                "transformations": [
                                    {
                                        "type": "DIRECT",
                                        "subtype": "IDENTITY"
                                    }
                                ]
                            }
                        ]
                    }
                }
            }, 

The customer_full field has transformation type, subtype and description but this is what we see in Marquez:

It is a bug?