Nullable column field fix. (#2896)

Author: phixMe

web/src/components/datasets/DatasetInfo.tsx

@@ -116,7 +116,7 @@ const DatasetInfo: FunctionComponent<DatasetInfoProps> = (props) => {
                         <TableCell align='left'>
                           <Chip
                             size={'small'}
-                            label={<MqText font={'mono'}>{field.type}</MqText>}
+                            label={<MqText font={'mono'} small>{field.type || 'N/A'}</MqText>}
                             variant={'outlined'}
                           />
                         </TableCell>

web/src/types/api.ts

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: Apache-2.0
 
 import { JobOrDataset, LineageNode } from './lineage'
+import {Nullable} from "./util/Nullable";
 
 export interface Tag {
   name: string
@@ -150,7 +151,7 @@ export type DatasetType = 'DB_TABLE' | 'STREAM'
 
 export interface Field {
   name: string
-  type: string
+  type: Nullable<string>
   tags: string[]
   description: string
 }