File format of insert overwrite dir does not take effect

set hive.default.fileformat=parquet;

-- Not as expected, I want an orc file but written in parquet format
INSERT OVERWRITE DIRECTORY '$tablePath'
STORED AS
  INPUTFORMAT 'org.apache.hadoop.hive.ql.io.orc.OrcInputFormat'
  OUTPUTFORMAT 'org.apache.hadoop.hive.ql.io.orc.OrcOutputFormat'
select 1;

-- Failed
select * from `orc`.`$tablePath`;