arangosh> db.example.ensureIndex({ type: "skiplist", fields: [ "a", "b" ] }); { "deduplicate" : true, "fields" : [ "a", "b" ], "id" : "example/74433", "isNewlyCreated" : true, "name" : "idx_1646382081922564096", "selectivityEstimate" : 1, "sparse" : false, "type" : "skiplist", "unique" : false, "code" : 201 } arangosh> var indexInfo = db.example.getIndexes(); arangosh> indexInfo; [ { "fields" : [ "_key" ], "id" : "example/0", "name" : "primary", "selectivityEstimate" : 1, "sparse" : false, "type" : "primary", "unique" : true }, { "deduplicate" : true, "fields" : [ "a", "b" ], "id" : "example/74433", "name" : "idx_1646382081922564096", "selectivityEstimate" : 1, "sparse" : false, "type" : "skiplist", "unique" : false } ] arangosh> db._dropIndex(indexInfo[0]) false arangosh> db._dropIndex(indexInfo[1].id) true arangosh> indexInfo = db.example.getIndexes(); [ { "fields" : [ "_key" ], "id" : "example/0", "name" : "primary", "selectivityEstimate" : 1, "sparse" : false, "type" : "primary", "unique" : true } ]