Fix mongodb smoke test with varchar keyword
@@ -77,7 +77,7 @@ public class TestMongoIntegrationSmokeTest
", DATE '1980-05-07' _date" +
", TIMESTAMP '1980-05-07 11:22:33.456' _timestamp" +
", ObjectId('ffffffffffffffffffffffff') _objectid" +
- ", cast(ObjectId('ffffffffffffffffffffffff') as string) _objectid_string";
+ ", cast(ObjectId('ffffffffffffffffffffffff') as varchar) _objectid_string";
assertUpdate(query, 1);
