Hive中创建orc表，插入orc表

1 创建orc表

CREATE EXTERNAL TABLE foo (
     columnA string,
     columnB string
) PARTITIONED BY (date string)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY "\t"
STORED AS ORC
LOCATION '/path/to/hive/tables/foo';
TBLPROPERTIES ('orc.compress'='SNAPPY');

或者（上面的语句“STORED AS ORC”执行后，再查看建表语句，会发现已自动把INPUTFORMAT、OUTPUTFORMAT 补全，如下所示：）

CREATE EXTERNAL TABLE foo (
     columnA string,
     columnB string
) PARTITIONED BY (date string)
ROW FORMAT DELIMITED
FIELDS TERMINATED BY "\t"
STORED AS INPUTFORMAT 
  'org.apache.hadoop.hive.ql.io.orc.OrcInputFormat' 
OUTPUTFORMAT 
  'org.apache.hadoop.hive.ql.io.orc.OrcOutputFormat'
LOCATION '/path/to/hive/tables/foo';
TBLPROPERTIES ('orc.compress'='SNAPPY');

2

当使用insert语句往lzo表里插入数据时，需要加入下面的参数：

    set hive.default.fileformat=Orc;

---------

要把

SET hive.exec.compress.output=true;
SET mapred.output.compression.codec=com.hadoop.compression.lzo.LzopCodec;

去掉