# 联合
================================================================================

## 参数

+-------------------+--------+----------+----------------------------------+
| 名称              | 类型   | 是否必传 | 备注                             |
+-------------------+--------+----------+----------------------------------+
| host              | string | Y        | postgre的ip路径                  |
+-------------------+--------+----------+----------------------------------+
| database          | string | Y        | 数据库名称                       |
+-------------------+--------+----------+----------------------------------+
| user              | string | Y        | 用户名                           |
+-------------------+--------+----------+----------------------------------+
| password          | string | Y        | 密码                             |
+-------------------+--------+----------+----------------------------------+
| port              | string | Y        | 端口                             |
+-------------------+--------+----------+----------------------------------+
| metadataTable01   | string | Y        | 输入表一的元数据表               |
+-------------------+--------+----------+----------------------------------+
| metadataTable02   | string | Y        | 输入表二的元数据表               |
+-------------------+--------+----------+----------------------------------+
| dataTable01       | string | Y        | 输入表一的名称，输入要素必须是面 |
+-------------------+--------+----------+----------------------------------+
| dataTable02       | string | Y        | 输入表二的名称，输入要素必须是面 |
+-------------------+--------+----------+----------------------------------+
| outputTable       | string | Y        | 输出结果的表名                   |
+-------------------+--------+----------+----------------------------------+
| cluster_tolerance | string | Y        | XY容差，默认传入0.001            |
+-------------------+--------+----------+----------------------------------+
| joinAttributes    | string | Y        | 连接属性，默认ALL，可选ONLY_FID  |
+-------------------+--------+----------+----------------------------------+
| runner            | string | Y        | 执行引擎                         |
+-------------------+--------+----------+----------------------------------+

## 返回

+--------+------+----------+---------------------------------------------------------+
| 名称   | 类型 | 是否必传 | 备注                                                    |
+--------+------+----------+---------------------------------------------------------+
| result | Row  | Y        | 所有相交要素的连接字段、要素WKT以及相关的要素长度、面积 |
+--------+------+----------+---------------------------------------------------------+

## 算法入口及参数

+----------+-------------------+--------------------+
| 名称     | 示例              | 备注               |
+----------+-------------------+--------------------+
| args[0]  | localhost         | postgre的ip路径    |
+----------+-------------------+--------------------+
| args[1]  | 5432              | 端口               |
+----------+-------------------+--------------------+
| args[2]  | postgis_25_sample | 数据库名称         |
+----------+-------------------+--------------------+
| args[3]  | postgres          | 用户名             |
+----------+-------------------+--------------------+
| args[4]  | kiwi              | 密码               |
+----------+-------------------+--------------------+
| args[5]  | landextent01      | 输入表一的元数据表 |
+----------+-------------------+--------------------+
| args[6]  | landextent02      | 输入表二的元数据表 |
+----------+-------------------+--------------------+
| args[7]  | land2018          | 输入表一的名称     |
+----------+-------------------+--------------------+
| args[8]  | land2019          | 输入表二的名称     |
+----------+-------------------+--------------------+
| args[9]  | t12027            | 输出结果的表名     |
+----------+-------------------+--------------------+
| args[10] | 0.001             | XY容差             |
+----------+-------------------+--------------------+
| args[11] | ALL               | 连接属性           |
+----------+-------------------+--------------------+
| args[12] | SparkRunner       | 执行引擎           |
+----------+-------------------+--------------------+