jdbc获取hive的分区键

要获取Hive表的分区键，可以使用JDBC连接到Hive，并查询Hive的元数据。以下是一个使用Java的示例代码：

import java.sql.*;

public class HivePartitionKeys {

    public static void main(String[] args) throws SQLException {
        String url = "jdbc:hive2://localhost:10000/default";
        String user = "your_username";
        String password = "your_password";
        String tableName = "my_table";

        // Connect to Hive
        Connection connection = DriverManager.getConnection(url, user, password);

        // Get partition keys for the table
        String query = "DESCRIBE " + tableName;
        Statement statement = connection.createStatement();
        ResultSet rs = statement.executeQuery(query);

        while (rs.next()) {
            String colName = rs.getString(1);
            String dataType = rs.getString(2);
            String comment = rs.getString(3);

            if (comment != null && comment.equals("分区键")) {
                System.out.println("Partition key: " + colName + " (" + dataType + ")");
            }
        }

        // Close connection
        rs.close();
        statement.close();
        connection.close();
    }
}

这个示例代码将连接到本地的Hive服务器并获取"my_table"表的分区键。注意，你需要替换连接URL、用户名、密码和表名，以便与你的Hive环境匹配。