code: public void addAllObjectsColumn(TableDefinition tableDef, String objID, int shardNo) {
      	String rowKey = ALL_OBJECTS_ROW_KEY;
      	if (shardNo > 0) {
      		rowKey = shardNo + "/" + ALL_OBJECTS_ROW_KEY;
      	}
          addColumn(SpiderService.termsStoreName(tableDef), rowKey, objID);
      }
docs: Add an "all objects" column for an object in the given table with the given ID. The
  "all objects" lives in the Terms store and its row key is "_" for objects residing
  in shard 0, "{shard number}/_" for objects residing in other shards. The column
  added is named with the object's ID but has no value.
  
  @param tableDef  {@link TableDefinition} of table that owns object.
  @param objID     ID of object being added.
  @param shardNo   Shard number if owing table is sharded.