我有一个类似的查询
CREATE TEMPORARY MACRO AAA (input VARCHAR(16))
input||
SUBSTR(
LPAD(
(CASE WHEN SUBSTR(LPAD(input,16,0),15,1) = 1 THEN 2
WHEN SUBSTR(LPAD(input,16,0),15,1) = 2 THEN 4
WHEN SUBSTR(LPAD(input,16,0),15,1) = 3 THEN 6
WHEN SUBSTR(LPAD(input,16,0),15,1) = 4 THEN 8
WHEN SUBSTR(LPAD(input,16,0),15,1) = 5 THEN 10
WHEN SUBSTR(LPAD(input,16,0),15,1) = 6 THEN 1
WHEN SUBSTR(LPAD(input,16,0),15,1) = 7 THEN 3
WHEN SUBSTR(LPAD(input,16,0),15,1) = 8 THEN 5
WHEN SUBSTR(LPAD(input,16,0),15,1) = 9 THEN 7
ELSE 0
END) +
(CASE WHEN SUBSTR(LPAD(input,16,0),16,1) = 1 THEN 1
WHEN SUBSTR(LPAD(input,16,0),16,1) = 2 THEN 2
WHEN SUBSTR(LPAD(input,16,0),16,1) = 3 THEN 3
WHEN SUBSTR(LPAD(input,16,0),16,1) = 4 THEN 4
WHEN SUBSTR(LPAD(input,16,0),16,1) = 5 THEN 5
WHEN SUBSTR(LPAD(input,16,0),16,1) = 6 THEN 6
WHEN SUBSTR(LPAD(input,16,0),16,1) = 7 THEN 7
WHEN SUBSTR(LPAD(input,16,0),16,1) = 8 THEN 8
WHEN SUBSTR(LPAD(input,16,0),16,1) = 9 THEN 9
ELSE 0
END)
,3,0), 3, 1);但是我想为hive创建一个临时函数。2创建一个临时函数需要修改什么？3它是什么格式的？
1条答案
按热度按时间pinkon5k1#
您必须编写自己的UDF。
参考：https://cwiki.apache.org/confluence/display/Hive/HivePlugins
一旦你有了自定义逻辑的jar文件，你可以创建如下函数：
在配置单元版本apache-hive-4.0.0-alpha-1中测试