hive custom udf function registration (permanent registration)

 

1. Temporary registration 1.导入jar包 2.部署到hive的lib下。 3.添加jar到hive的classpath $hive>add jar app-logs-hive-1.0-SNAPSHOT.jar ; 4.注册临时函数 $hive>create temporary function helloworld AS 'com.it.applogs.udf.DayStartUDF'; 2. Delete the registration function drop temporary function helloworld; 3. Permanent registration function create function helloword as 'com.it.applogs.udf.DayStartUDF' using jar 'hdfs:/jars/hive-functions-0.0.1.jar'; Note: The jar package needs to be uploaded to hdfs for permanent registration, otherwise the jar package will not be found when running in the cluster!

1. Temporary registration

1.导入jar包
		
2.部署到hive的lib下。
		
3.添加jar到hive的classpath
  $hive>add jar app-logs-hive-1.0-SNAPSHOT.jar ;
	
4.注册临时函数
  $hive>create temporary function helloworld AS 'com.it.applogs.udf.DayStartUDF';

2. Delete the registration function

drop temporary function helloworld;

3. Permanent registration function

create function helloword as 'com.it.applogs.udf.DayStartUDF' using jar 'hdfs:/jars/hive-functions-0.0.1.jar';

Note: The jar package needs to be uploaded to hdfs for permanent registration, otherwise the jar package will not be found when running in the cluster!