fix(ingest/powerbi): Update documentation

Author: mminichino

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

@@ -22,6 +22,7 @@
 from datahub.ingestion.source.state.stateful_ingestion_base import (
     StatefulIngestionConfigBase,
 )
+from datahub.utilities.global_warning_util import add_global_warning
 from datahub.utilities.lossy_collections import LossyList
 from datahub.utilities.perf_timer import PerfTimer
 
@@ -390,7 +391,8 @@ class PowerBiDashboardSourceConfig(
     # Enable/Disable extracting dataset schema
     extract_dataset_schema: bool = pydantic.Field(
         default=True,
-        description="Whether to ingest PBI Dataset Table columns and measures",
+        description="Whether to ingest PBI Dataset Table columns and measures."
+        " Note: this setting must be `true` for schema extraction and column lineage to be enabled.",
     )
     # Enable/Disable extracting lineage information of PowerBI Dataset
     extract_lineage: bool = pydantic.Field(
@@ -526,6 +528,7 @@ def validate_extract_column_level_lineage(cls, values: Dict) -> Dict:
             "native_query_parsing",
             "enable_advance_lineage_sql_construct",
             "extract_lineage",
+            "extract_dataset_schema",
         ]
 
         if (
@@ -591,3 +594,11 @@ def raise_error_for_dataset_type_mapping(cls, values: Dict) -> Dict:
             )
 
         return values
+
+    @root_validator(skip_on_failure=True)
+    def validate_extract_dataset_schema(cls, values: Dict) -> Dict:
+        if values.get("extract_dataset_schema") is False:
+            add_global_warning(
+                "Please use `extract_dataset_schema: true`, otherwise dataset schema extraction will be skipped."
+            )
+        return values