DH-4703 Set table-desription status

dataherald/api/fastapi.py

@@ -6,6 +6,7 @@
 from bson import json_util
 from fastapi import BackgroundTasks, HTTPException
 from overrides import override
+from sqlalchemy import MetaData, inspect
 
 from dataherald.api import API
 from dataherald.api.types import Query
@@ -221,10 +222,36 @@ def list_table_descriptions(
         self, db_connection_id: str | None = None, table_name: str | None = None
     ) -> list[TableSchemaDetail]:
         scanner_repository = DBScannerRepository(self.storage)
-        return scanner_repository.find_by(
+        table_descriptions = scanner_repository.find_by(
             {"db_connection_id": db_connection_id, "table_name": table_name}
         )
 
+        if db_connection_id:
+            db_connection_repository = DatabaseConnectionRepository(self.storage)
+            db_connection = db_connection_repository.find_by_id(db_connection_id)
+            database = SQLDatabase.get_sql_engine(db_connection)
+            inspector = inspect(database.engine)
+            meta = MetaData(bind=database.engine)
+            MetaData.reflect(meta, views=True)
+            all_tables = inspector.get_table_names() + inspector.get_view_names()
+
+            for table_description in table_descriptions:
+                if table_description.table_name not in all_tables:
+                    table_description.status = "DEPRECATED"
+                else:
+                    all_tables.remove(table_description.table_name)
+            for table in all_tables:
+                table_descriptions.append(
+                    TableSchemaDetail(
+                        table_name=table,
+                        status="NOT_SYNCHRONIZED",
+                        db_connection_id=db_connection_id,
+                        columns=[],
+                    )
+                )
+
+        return table_descriptions
+
     @override
     def add_golden_records(
         self, golden_records: List[GoldenRecordRequest]

dataherald/db_scanner/models/types.py

@@ -25,7 +25,8 @@ class TableSchemaDetail(BaseModel):
     table_name: str
     description: str | None
     table_schema: str | None
-    columns: list[ColumnDetail]
+    columns: list[ColumnDetail] = []
     examples: list = []
     last_schema_sync: datetime | None
-    status: str = "synchrinozed"
+    status: str = "SYNCHRONIZED"
+    error_message: str | None

dataherald/db_scanner/sqlalchemy.py

@@ -146,7 +146,7 @@ def scan_single_table(
                 meta=meta, db_engine=db_engine, table=table, rows_number=3
             ),
             last_schema_sync=datetime.now(),
-            status="syncronized",
+            status="SYNCHRONIZED",
         )
 
         repository.save_table_info(object)
@@ -171,13 +171,32 @@ def scan(
             ]
         if len(tables) == 0:
             raise ValueError("No table found")
-        result = []
+
+        # persist tables to be scanned
         for table in tables:
-            obj = self.scan_single_table(
-                meta=meta,
-                table=table,
-                db_engine=db_engine,
-                db_connection_id=db_connection_id,
-                repository=repository,
+            repository.save_table_info(
+                TableSchemaDetail(
+                    db_connection_id=db_connection_id,
+                    table_name=table,
+                    status="SYNCHRONIZING",
+                )
             )
-            result.append(obj)
+
+        for table in tables:
+            try:
+                self.scan_single_table(
+                    meta=meta,
+                    table=table,
+                    db_engine=db_engine,
+                    db_connection_id=db_connection_id,
+                    repository=repository,
+                )
+            except Exception as e:
+                repository.save_table_info(
+                    TableSchemaDetail(
+                        db_connection_id=db_connection_id,
+                        table_name=table,
+                        status="FAILED",
+                        error_message=f"{e}",
+                    )
+                )