villebro commented on a change in pull request #10244:
URL: 
https://github.com/apache/incubator-superset/pull/10244#discussion_r450588559



##########
File path: superset/connectors/sqla/models.py
##########
@@ -1188,12 +1188,16 @@ def fetch_metadata(self, commit: bool = True) -> None:
         any_date_col = None
         db_engine_spec = self.database.db_engine_spec
         db_dialect = self.database.get_dialect()
-        dbcols = (
-            db.session.query(TableColumn)
-            .filter(TableColumn.table == self)
-            .filter(or_(TableColumn.column_name == col.name for col in 
table_.columns))
-        )
-        dbcols = {dbcol.column_name: dbcol for dbcol in dbcols}
+        
+        try:
+            dbcols = (
+                db.session.query(TableColumn)
+                .filter(TableColumn.table == self)
+                .filter(TableColumn.column_name.in_([col.name for col in 
table.columns]))
+            )
+            dbcols = {dbcol.column_name: dbcol for dbcol in dbcols}
+        except Exception as e:
+            logger.error("Failed to get columns: " + str(e))

Review comment:
       What exception are we trying to catch here? In general we should always 
try to be as specific as possible as to what exception we are expecting to see, 
as opposed to catching all `Exception`.




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