Implement custom UDF to take effect permanently

UDF is permanently valid and can only be modified now Source code. However, it can be modified or implemented. create a new one in the bin directory of hive_home. in the hiverc file, you can write the UDF registration statement written here, just like the built-in hive usage. /hive command will load hive_home/bin /. hiverc and $ home /. hiverc is used as the file required for initialization in. add the following content to the hiverc file: Add JAR/run/JAR/avg_test.jarcreate temporary function avg_test 'hive. UDAF. avg ';