Question

我正在尝试从Linux（Red Hat 7.3 64位）上的.netcore（v.1.0.1）应用程序连接到Hive。

Program.cs代码：

nextTick

我的项目设置文件： app.csproj

using System;
using System.Data.Odbc;
using System.Collections;
using System.Collections.Generic;

namespace app
{
   class Program
    {
        static void Main(string[] args)
        {
            var connectionString = "DSN=Hadoop Hive";
            var createTableCommandText = "CREATE TABLE Searches(searchTerm      STRING, userid BIGINT,userIp STRING) " +
                                        "COMMENT 'Stores all searches for data' " +
                                        "PARTITIONED BY(searchTime DATE) " +
                                        "STORED AS SEQUENCEFILE;";

            using (var connection = new OdbcConnection(connectionString))
            {
                using (var command = new OdbcCommand(createTableCommandText, connection))
                {
                   try
                   {

                       connection.Open();

                    // Create a table.
                    command.ExecuteNonQuery();

                    // Insert row of data.
                    command.CommandText = "INSERT INTO TABLE Searches PARTITION (searchTime = '2015-02-08') " +
                                           "VALUES ('search term', 1, '127.0.0.1')";

                    command.ExecuteNonQuery();

                    // Reading data from Hadoop.
                    command.CommandText = "SELECT * FROM Searches";
                    using (var reader = command.ExecuteReader())
                    {
                        while (reader.Read())
                        {
                            for (var i = 0; i < reader.FieldCount; i++)
                            {
                                Console.WriteLine(reader[i]);
                            }
                        }
                    }
                }
                catch (OdbcException ex)
                {
                    Console.WriteLine(ex.Message);
                    throw;
                }
                finally
                {
                    Drop table
                    command.CommandText = "DROP TABLE Searches";
                    command.ExecuteNonQuery();
                }
            }
        }

运行“dotnet run”时收到以下错误：

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFramework>netcoreapp1.1</TargetFramework>
     <PackageId>HadoopLibrary</PackageId>
       <NetStandardImplicitPackageVersion>1.6.0</NetStandardImplicitPackageVersion>
 </PropertyGroup>
 <ItemGroup>
    <PackageReference Include="System.Data.Common" Version="4.3.0" />
    <PackageReference Include="System.Threading.Thread" Version="4.3.0" />
    <PackageReference Include="System.Collections.NonGeneric" Version="4.0.1" />
    <PackageReference Include="MSA.NetCore.ODBC" Version="1.0.3" />
</ItemGroup>

任何人都可以帮忙解决这个问题吗？驱动程序（Hortonworks ODBC for Hive）在此服务器上运行。这里的ODBC连接库存在问题。

Answer 1

您似乎正在尝试将其构建和加载为32位应用程序，而Hortonworks ODBC for Hive可能不支持该功能。为此，需要检查Hortonworks的文档。

.netcore上的linux odbc连接到hive

1 个答案: