feat(ingest/unity-catalog): Support external S3 lineage (#9025)

metadata-ingestion/src/datahub/ingestion/source/aws/s3_util.py

@@ -34,21 +34,26 @@ def get_bucket_relative_path(s3_uri: str) -> str:
     return "/".join(strip_s3_prefix(s3_uri).split("/")[1:])
 
 
-def make_s3_urn(s3_uri: str, env: str) -> str:
+def make_s3_urn(s3_uri: str, env: str, remove_extension: bool = True) -> str:
     s3_name = strip_s3_prefix(s3_uri)
 
     if s3_name.endswith("/"):
         s3_name = s3_name[:-1]
 
     name, extension = os.path.splitext(s3_name)
-
+    if remove_extension and extension != "":
-    if extension != "":
         extension = extension[1:]  # remove the dot
         return f"urn:li:dataset:(urn:li:dataPlatform:s3,{name}_{extension},{env})"
 
     return f"urn:li:dataset:(urn:li:dataPlatform:s3,{s3_name},{env})"
 
 
+def make_s3_urn_for_lineage(s3_uri: str, env: str) -> str:
+    # Ideally this is the implementation for all S3 URNs
+    # Don't feel comfortable changing `make_s3_urn` for glue, sagemaker, and athena
+    return make_s3_urn(s3_uri, env, remove_extension=False)
+
+
 def get_bucket_name(s3_uri: str) -> str:
     if not is_s3_uri(s3_uri):
         raise ValueError(

metadata-ingestion/src/datahub/ingestion/source/snowflake/snowflake_lineage_v2.py

@@ -21,7 +21,7 @@ from snowflake.connector import SnowflakeConnection
 import datahub.emitter.mce_builder as builder
 from datahub.emitter.mcp import MetadataChangeProposalWrapper
 from datahub.ingestion.api.workunit import MetadataWorkUnit
-from datahub.ingestion.source.aws.s3_util import make_s3_urn
+from datahub.ingestion.source.aws.s3_util import make_s3_urn_for_lineage
 from datahub.ingestion.source.snowflake.constants import (
     LINEAGE_PERMISSION_ERROR,
     SnowflakeEdition,
@@ -652,7 +652,9 @@ class SnowflakeLineageExtractor(
             # For now, populate only for S3
             if external_lineage_entry.startswith("s3://"):
                 external_upstream_table = UpstreamClass(
-                    dataset=make_s3_urn(external_lineage_entry, self.config.env),
+                    dataset=make_s3_urn_for_lineage(
+                        external_lineage_entry, self.config.env
+                    ),
                     type=DatasetLineageTypeClass.COPY,
                 )
                 external_upstreams.append(external_upstream_table)

metadata-ingestion/src/datahub/ingestion/source/unity/config.py

@@ -166,6 +166,14 @@ class UnityCatalogSourceConfig(
         description="Option to enable/disable lineage generation.",
     )
 
+    include_external_lineage: bool = pydantic.Field(
+        default=True,
+        description=(
+            "Option to enable/disable lineage generation for external tables."
+            " Only external S3 tables are supported at the moment."
+        ),
+    )
+
     include_notebooks: bool = pydantic.Field(
         default=False,
         description="Ingest notebooks, represented as DataHub datasets.",

metadata-ingestion/src/datahub/ingestion/source/unity/proxy.py

@@ -33,6 +33,7 @@ from datahub.ingestion.source.unity.proxy_types import (
     ALLOWED_STATEMENT_TYPES,
     Catalog,
     Column,
+    ExternalTableReference,
     Metastore,
     Notebook,
     Query,
@@ -248,6 +249,13 @@ class UnityCatalogApiProxy(UnityCatalogProxyProfilingMixin):
                     )
                     if table_ref:
                         table.upstreams[table_ref] = {}
+                elif "fileInfo" in item:
+                    external_ref = ExternalTableReference.create_from_lineage(
+                        item["fileInfo"]
+                    )
+                    if external_ref:
+                        table.external_upstreams.add(external_ref)
+
                 for notebook in item.get("notebookInfos") or []:
                     table.upstream_notebooks.add(notebook["notebook_id"])
 

metadata-ingestion/src/datahub/ingestion/source/unity/proxy_types.py

@@ -10,6 +10,7 @@ from databricks.sdk.service.catalog import (
     CatalogType,
     ColumnTypeName,
     DataSourceFormat,
+    SecurableType,
     TableType,
 )
 from databricks.sdk.service.sql import QueryStatementType
@@ -176,6 +177,35 @@ class TableReference:
         return f"{self.catalog}/{self.schema}/{self.table}"
 
 
+@dataclass(frozen=True, order=True)
+class ExternalTableReference:
+    path: str
+    has_permission: bool
+    name: Optional[str]
+    type: Optional[SecurableType]
+    storage_location: Optional[str]
+
+    @classmethod
+    def create_from_lineage(cls, d: dict) -> Optional["ExternalTableReference"]:
+        try:
+            securable_type: Optional[SecurableType]
+            try:
+                securable_type = SecurableType(d.get("securable_type", "").lower())
+            except ValueError:
+                securable_type = None
+
+            return cls(
+                path=d["path"],
+                has_permission=d.get("has_permission") or True,
+                name=d.get("securable_name"),
+                type=securable_type,
+                storage_location=d.get("storage_location"),
+            )
+        except Exception as e:
+            logger.warning(f"Failed to create ExternalTableReference from {d}: {e}")
+            return None
+
+
 @dataclass
 class Table(CommonProperty):
     schema: Schema
@@ -193,6 +223,7 @@ class Table(CommonProperty):
     view_definition: Optional[str]
     properties: Dict[str, str]
     upstreams: Dict[TableReference, Dict[str, List[str]]] = field(default_factory=dict)
+    external_upstreams: Set[ExternalTableReference] = field(default_factory=set)
     upstream_notebooks: Set[NotebookId] = field(default_factory=set)
     downstream_notebooks: Set[NotebookId] = field(default_factory=set)
 

metadata-ingestion/src/datahub/ingestion/source/unity/report.py

@@ -19,6 +19,8 @@ class UnityCatalogReport(IngestionStageReport, StaleEntityRemovalSourceReport):
     notebooks: EntityFilterReport = EntityFilterReport.field(type="notebook")
 
     num_column_lineage_skipped_column_count: int = 0
+    num_external_upstreams_lacking_permissions: int = 0
+    num_external_upstreams_unsupported: int = 0
 
     num_queries: int = 0
     num_queries_dropped_parse_failure: int = 0

metadata-ingestion/src/datahub/ingestion/source/unity/source.py

@@ -41,6 +41,7 @@ from datahub.ingestion.api.source import (
     TestConnectionReport,
 )
 from datahub.ingestion.api.workunit import MetadataWorkUnit
+from datahub.ingestion.source.aws.s3_util import make_s3_urn_for_lineage
 from datahub.ingestion.source.common.subtypes import (
     DatasetContainerSubTypes,
     DatasetSubTypes,
@@ -455,6 +456,28 @@ class UnityCatalogSource(StatefulIngestionSourceBase, TestableSource):
                 )
             )
 
+        if self.config.include_external_lineage:
+            for external_ref in table.external_upstreams:
+                if not external_ref.has_permission or not external_ref.path:
+                    self.report.num_external_upstreams_lacking_permissions += 1
+                    logger.warning(
+                        f"Lacking permissions for external file upstream on {table.ref}"
+                    )
+                elif external_ref.path.startswith("s3://"):
+                    upstreams.append(
+                        UpstreamClass(
+                            dataset=make_s3_urn_for_lineage(
+                                external_ref.path, self.config.env
+                            ),
+                            type=DatasetLineageTypeClass.COPY,
+                        )
+                    )
+                else:
+                    self.report.num_external_upstreams_unsupported += 1
+                    logger.warning(
+                        f"Unsupported external file upstream on {table.ref}: {external_ref.path}"
+                    )
+
         if upstreams:
             return UpstreamLineageClass(
                 upstreams=upstreams,