diff --git a/packages/types/dbinfo.d.ts b/packages/types/dbinfo.d.ts
index 37b751a6a..73b4951f6 100644
--- a/packages/types/dbinfo.d.ts
+++ b/packages/types/dbinfo.d.ts
@@ -94,7 +94,19 @@ export interface TableInfo extends DatabaseObjectInfo {
   __isDynamicStructure?: boolean;
 }
 
-export interface CollectionInfo extends DatabaseObjectInfo {}
+export interface CollectionInfo extends DatabaseObjectInfo {
+  // all known columns with definition (only used in Cassandra)
+  knownColumns?: ColumnInfo[];
+
+  // unique combination of columns (should be contatenation of partitionKey and clusterKey)
+  uniqueKey?: ColumnReference[];
+
+  // partition key columns
+  partitionKey?: ColumnReference[]
+
+  // unique key inside partition
+  clusterKey?: ColumnReference[];  
+}
 
 export interface ViewInfo extends SqlObjectInfo {
   columns: ColumnInfo[];
diff --git a/plugins/dbgate-plugin-mongo/src/backend/Analyser.js b/plugins/dbgate-plugin-mongo/src/backend/Analyser.js
index 8799f6c22..5c87fb305 100644
--- a/plugins/dbgate-plugin-mongo/src/backend/Analyser.js
+++ b/plugins/dbgate-plugin-mongo/src/backend/Analyser.js
@@ -34,9 +34,11 @@ class Analyser extends DatabaseAnalyser {
         ...collections.map((x, index) => ({
           pureName: x.name,
           tableRowCount: stats[index]?.count,
+          uniqueKey: [{ columnName: '_id' }],
         })),
         ...views.map((x, index) => ({
           pureName: x.name,
+          uniqueKey: [{ columnName: '_id' }],
         })),
       ],
     });