feat: build column lineage using sqlglot

.gitignore

@@ -8,4 +8,6 @@ dist
 examples/contiamo.yaml
 /notes.md
 /sink_results.json
-*_output.json
+*_output.json
+.env
+./sap_hana_results.json

LICENSE

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Taskfile.yaml

@@ -41,12 +41,14 @@ tasks:
       - poetry run pyright
       - poetry run ruff check .
       - poetry run black --check .
+      - poetry run unimport --check .
 
   fix:
     desc: Fix linters
     deps:
       - setup
     cmds:
+      - poetry run unimport -r
       - poetry run black .
       - poetry run ruff --fix-only .
 

console_recipe.yaml

@@ -0,0 +1,39 @@
+source:
+  type: datahub_sap_hana.ingestion.HanaSource
+  config:
+    username: HOTEL
+    password: Localdev1
+    database: HXE
+    host_port: localhost:39041
+    include_view_lineage: true
+    include_column_lineage: true 
+    schema_pattern:
+      allow:
+        - "HOTEL"
+      ignoreCase: true
+    profile_pattern:
+      allow:
+        - "HOTEL"
+    profiling:
+      enabled: True
+      include_field_null_count: true
+      include_field_min_value: true
+      include_field_max_value: true
+      include_field_mean_value: true
+      include_field_median_value: true
+      include_field_stddev_value: true
+      include_field_quantiles: true
+      include_field_distinct_value_frequencies: true
+      include_field_histogram: true
+      include_field_sample_values: true
+    domain:
+      "urn:li:domain:sales":
+        allow:
+          - "HOTEL"
+sink: 
+  type: console
+
+#sink: 
+#  type: file
+#  config: 
+#    filename: ./sap_hana_results.json

datahub_sap_hana/column_lineage_schema.py

@@ -0,0 +1,58 @@
+from dataclasses import dataclass
+
+from serde import serde
+from sqlglot.lineage import Node
+
+
+def parse_column_name(column_name: str):
+    """
+    Removes the table/name and alias from the column name returned by sqlglot,
+    eg: instead of 'hotel.room', it will return 'room'.
+    """
+    parsed_name = column_name.split(".")
+    return parsed_name[-1]
+
+
+@serde
+@dataclass
+class Table:
+    schema: str
+    name: str
+
+
+@serde
+@dataclass
+class View(Table):
+    sql: str
+
+
+@serde
+@dataclass
+class ColumnField:
+    """
+    ColumnField contains the metadata to describe a column in a table.
+    Use `ColumnField.from_node(lineage_node)` to create a ColumnField from a sqlglot node.
+    """
+
+    name: str
+    dataset: Table
+
+    @classmethod
+    def from_node(cls, node: Node, schema: str):
+        """Creates a ColumnField from a sqlglot node."""
+        return cls(
+            name=parse_column_name(node.name),
+            dataset=Table(schema=schema, name=node.source.name),
+        )
+
+
+class UpstreamLineageField(ColumnField):
+    """UpstreamField contains the metadata to describe the upstream column (source) lineage of a DownstreamField."""
+
+    pass
+
+
+class DownstreamLineageField(ColumnField):
+    """DownstreamField contains the metadata to describe the downstream column (target) lineage of a column in a table."""
+
+    pass