用hivesql实现一下
时间: 2023-08-15 12:33:01 浏览: 56
假设已经有了一个包含所有计算口径和对应标签编码的表 `caliber_label_map`,可以使用以下HiveSQL语句将400个计算口径归类到80个标签中去,并实现计算逻辑的复用:
```
-- 创建一个包含所有计算口径的表 caliber_list
CREATE TABLE caliber_list (
caliber_name STRING,
caliber_code STRING
);
-- 插入所有计算口径及对应编码
INSERT INTO caliber_list VALUES
('caliber1', '01010101'),
('caliber2', '01010102'),
('caliber3', '01010201'),
...
('caliber400', '80808080');
-- 创建一个包含所有标签及对应编码的表 label_list
CREATE TABLE label_list (
label_name STRING,
label_code STRING
);
-- 插入所有标签及对应编码
INSERT INTO label_list VALUES
('label1', '01'),
('label2', '02'),
('label3', '03'),
...
('label80', '80');
-- 创建一个映射表 caliber_label_map,用于将计算口径和标签进行关联
CREATE TABLE caliber_label_map (
caliber_code STRING,
label_code STRING
);
-- 插入所有计算口径和对应标签的映射关系
INSERT INTO caliber_label_map VALUES
('01010101', '01'),
('01010102', '01'),
('01010201', '02'),
...
('80808080', '80');
-- 创建一个函数 get_caliber_label,用于获取计算口径对应的标签编码
CREATE FUNCTION get_caliber_label(caliber STRING)
RETURNS STRING
AS '
SELECT label_code
FROM caliber_label_map
WHERE caliber_code = (
SELECT caliber_code
FROM caliber_list
WHERE caliber_name = {{caliber}}
)
'
USING get_caliber_label.jar;
-- 创建一个函数 get_label_calculation,用于获取标签的计算逻辑函数
CREATE FUNCTION get_label_calculation(label STRING)
RETURNS STRING
AS '
SELECT CONCAT("SELECT ", label_calculation, "(", caliber_name, ")")
FROM (
SELECT CONCAT("SUM(", caliber_name, ")") AS label_calculation, caliber_code
FROM caliber_label_map
JOIN caliber_list ON caliber_label_map.caliber_code = caliber_list.caliber_code
WHERE label_code = {{label}}
GROUP BY caliber_code
) t
'
USING get_label_calculation.jar;
-- 使用函数进行计算
SELECT get_label_calculation('01')(caliber1) AS label1_caliber1_sum,
get_label_calculation('01')(caliber2) AS label1_caliber2_sum,
get_label_calculation('02')(caliber3) AS label2_caliber3_sum,
...
get_label_calculation('80')(caliber400) AS label80_caliber400_sum
FROM my_table;
```
以上代码只是一个示例,实际实现时需要根据具体情况进行调整。