[ENH]: fix sysdb client grpc (#2068)

## Description of changes

*Summarize the changes made by this PR.*
 - Improvements & Bug fixes
	 - Fix issue with sysdb grpc client

chromadb/db/impl/grpc/client.py

@@ -246,14 +246,32 @@ def get_collections(
         offset: Optional[int] = None,
     ) -> Sequence[Collection]:
         # TODO: implement limit and offset in the gRPC service
-        request = GetCollectionsRequest(
-            id=id.hex if id else None,
-            name=name,
-            tenant=tenant,
-            database=database,
-            limit=limit,
-            offset=offset,
-        )
+        request = None
+        if id is not None:
+            request = GetCollectionsRequest(
+                id=id.hex,
+                limit=limit,
+                offset=offset,
+            )
+        if name is not None:
+            if tenant is None and database is None:
+                raise ValueError(
+                    "If name is specified, tenant and database must also be specified in order to uniquely identify the collection"
+                )
+            request = GetCollectionsRequest(
+                name=name,
+                tenant=tenant,
+                database=database,
+                limit=limit,
+                offset=offset,
+            )
+        if id is None and name is None:
+            request = GetCollectionsRequest(
+                tenant=tenant,
+                database=database,
+                limit=limit,
+                offset=offset,
+            )
         response: GetCollectionsResponse = self._sys_db_stub.GetCollections(request)
         results: List[Collection] = []
         for collection in response.collections:

chromadb/db/impl/grpc/server.py

@@ -359,20 +359,19 @@ def GetCollections(
         target_id = UUID(hex=request.id) if request.HasField("id") else None
         target_name = request.name if request.HasField("name") else None
 
-        tenant = request.tenant
-        database = request.database
-        if tenant not in self._tenants_to_databases_to_collections:
-            return GetCollectionsResponse(
-                status=proto.Status(code=404, reason=f"Tenant {tenant} not found")
-            )
-        if database not in self._tenants_to_databases_to_collections[tenant]:
-            return GetCollectionsResponse(
-                status=proto.Status(code=404, reason=f"Database {database} not found")
-            )
-        collections = self._tenants_to_databases_to_collections[tenant][database]
-
+        allCollections = {}
+        for tenant, databases in self._tenants_to_databases_to_collections.items():
+            for database, collections in databases.items():
+                if request.tenant != "" and tenant != request.tenant:
+                    continue
+                if request.database != "" and database != request.database:
+                    continue
+                allCollections.update(collections)
+                print(
+                    f"Tenant: {tenant}, Database: {database}, Collections: {collections}"
+                )
         found_collections = []
-        for collection in collections.values():
+        for collection in allCollections.values():
             if target_id and collection["id"] != target_id:
                 continue
             if target_name and collection["name"] != target_name: