SCM_RIGHTS

SCM_RIGHTS是一种UNIX域套接字（UNIX domain socket）的控制消息类型，用于在进程之间传递文件描述符。它是Socket Control Message（SCM）机制的一部分，允许进程在不同的域套接字之间传递额外的信息。

在UNIX系统中，每个打开的文件都有一个唯一的文件描述符，它是对该文件的引用。通过使用SCM_RIGHTS消息类型，进程可以将一个文件描述符发送给另一个进程，使得接收进程可以使用该文件描述符来访问相同的文件或资源。

SCM_RIGHTS消息类型的使用需要一对相关的套接字，一个用于发送方，一个用于接收方。发送方使用sendmsg函数将文件描述符附加到消息中，并通过UNIX域套接字将消息发送给接收方。接收方使用recvmsg函数接收消息，并从中提取文件描述符。

SCM_RIGHTS的使用场景包括进程间通信、传递打开的文件、传递网络套接字等。它提供了一种灵活而高效的机制，使得进程可以共享和传递资源。

相关问题

Bitnami Redmine(windows版)的configuration.yml 文件下没有找到scm_subversion_repository，scm_username和scm_password配置信息？

在 Bitnami Redmine (Windows 版本) 中，配置 Subversion 仓库的信息需要通过 Redmine 安装目录下的 `config/configuration.yml` 文件来进行配置。在该文件中，你需要添加以下类似的配置：

production:
  scm_subversion_command: C:\Program Files\TortoiseSVN\bin\svn.exe
  scm_subversion_arguments: --no-auth-cache --non-interactive
  scm_subversion_repository: svn://svn.example.com/myrepo
  scm_username: myusername
  scm_password: mypassword

其中，`scm_subversion_command` 和 `scm_subversion_arguments` 配置用于指定 Subversion 命令的路径和参数，`scm_subversion_repository` 配置用于指定 Subversion 仓库的 URL，`scm_username` 和 `scm_password` 配置用于指定访问 Subversion 仓库所需要的用户名和密码。

如果在 `config/configuration.yml` 文件中没有找到这些配置项，你可以手动添加它们。请注意确保文件格式的正确性，例如缩进和冒号的使用等。同时，修改配置后需要重启 Redmine 服务才能生效。

请帮我看看这个sql语句是否正确，并改正：select a.ebeln, a.ebelp, a.art, a.kdauf, a.zbw, a.size1, a.txz01, a.menge, b.quantity, (a.menge - b.quantity) as OWE_MATERIAL, ( select sum(THIS_PLAN_QTY) as HAVE_PLAN , a.ebeln , a.ebelp , a.kdauf from SCM_OUTSOURCE_PRODUCTION_PLAN_LIST c , SCM_PROCESS_PURCHASE_ORDER_D a group by c.order_no , c.order_seq , c.sales_order , a.ebeln , a.ebelp , a.kdauf having c.order_no = a.ebeln And c.order_seq = a.ebelp And c.sales_order = a.kdauf ) , ( select a.menge - t.HAVE_PLAN as OWN_PLAY from (select sum(THIS_PLAN_QTY) as HAVE_PLAN , c.order_no , c.order_seq , c.sales_order from SCM_OUTSOURCE_PRODUCTION_PLAN_LIST c , SCM_PROCESS_PURCHASE_ORDER_D a group by c.order_no , c.order_seq , c.sales_order , a.ebeln , a.ebelp , a.kdauf having c.order_no = a.ebeln And c.order_seq = a.ebelp And c.sales_order = a.kdauf ) t , SCM_PROCESS_PURCHASE_ORDER_D a where a.ebeln = t.order_no and a.ebelp = t.order_seq and a.menge = t.sales_order ) , d.scan_qty, (d.quantity - d.scan_qty) as OWN_PRODUCE, e.scan_qty, (e.quantity - e.scan_qty) as OWE_SHIP from SCM_PROCESS_PURCHASE_ORDER_D a left join MMS_INOUT_BILL_M b On a.ebeln = b.purchase_order_number And a.ebelp = b.purchase_order_seq And a.kdauf = b.sales_order left join SCM_OUTSOURCE_PRODUCTION_PLAN_LIST c on a.ebeln = c.order_no And a.ebelp = c.order_seq And a.kdauf = c.sales_order left join SCM_PROCESS_OUTPUT d on a.ebeln = d.order_no And a.ebelp = d.order_seq And a.kdauf = d.sales_order left join SCM_OUTSOURCE_SHIP e on a.ebeln = e.qr_code and a.ebelp = e.order_no and a.kdauf = e.order_seq where a.art = 'IE7181' Order by a.ebeln desc, a.ebelp;

这个 SQL 语句比较复杂，但是有一些问题需要修改：

- 在子查询中，需要将 select 子句中的 a.ebeln, a.ebelp, a.kdauf 与 group by 子句中的字段保持一致，否则会出现错误。
- 子查询中的第一个 SELECT 子句需要加上 WHERE 子句，限制查询条件。
- 子查询中的第二个 SELECT 子句中的 a.menge 应该改为 t.sales_order。
- 在最后的 SELECT 子句中，d.scan_qty 与 e.scan_qty 都没有明确指定表名，可能会出现错误。

以下是修改后的 SQL 语句：

SELECT
    a.ebeln,
    a.ebelp,
    a.art,
    a.kdauf,
    a.zbw,
    a.size1,
    a.txz01,
    a.menge,
    b.quantity,
    (a.menge - b.quantity) AS OWE_MATERIAL,
    (
        SELECT
            SUM(c.THIS_PLAN_QTY) AS HAVE_PLAN,
            a.ebeln,
            a.ebelp,
            a.kdauf
        FROM
            SCM_OUTSOURCE_PRODUCTION_PLAN_LIST c,
            SCM_PROCESS_PURCHASE_ORDER_D a
        WHERE
            c.order_no = a.ebeln
            AND c.order_seq = a.ebelp
            AND c.sales_order = a.kdauf
            AND a.art = 'IE7181'
        GROUP BY
            c.order_no,
            c.order_seq,
            c.sales_order,
            a.ebeln,
            a.ebelp,
            a.kdauf
    ),
    (
        SELECT
            a.menge - t.sales_order AS OWN_PLAY
        FROM
            (
                SELECT
                    SUM(c.THIS_PLAN_QTY) AS HAVE_PLAN,
                    c.order_no,
                    c.order_seq,
                    c.sales_order
                FROM
                    SCM_OUTSOURCE_PRODUCTION_PLAN_LIST c,
                    SCM_PROCESS_PURCHASE_ORDER_D a
                WHERE
                    c.order_no = a.ebeln
                    AND c.order_seq = a.ebelp
                    AND c.sales_order = a.kdauf
                    AND a.art = 'IE7181'
                GROUP BY
                    c.order_no,
                    c.order_seq,
                    c.sales_order,
                    a.ebeln,
                    a.ebelp,
                    a.kdauf
            ) t,
            SCM_PROCESS_PURCHASE_ORDER_D a
        WHERE
            a.ebeln = t.order_no
            AND a.ebelp = t.order_seq
            AND a.kdauf = t.sales_order
            AND a.art = 'IE7181'
    ),
    d.scan_qty,
    (d.quantity - d.scan_qty) AS OWN_PRODUCE,
    e.scan_qty,
    (e.quantity - e.scan_qty) AS OWE_SHIP
FROM
    SCM_PROCESS_PURCHASE_ORDER_D a
LEFT JOIN MMS_INOUT_BILL_M b ON a.ebeln = b.purchase_order_number AND a.ebelp = b.purchase_order_seq AND a.kdauf = b.sales_order
LEFT JOIN SCM_OUTSOURCE_PRODUCTION_PLAN_LIST c ON a.ebeln = c.order_no AND a.ebelp = c.order_seq AND a.kdauf = c.sales_order
LEFT JOIN SCM_PROCESS_OUTPUT d ON a.ebeln = d.order_no AND a.ebelp = d.order_seq AND a.kdauf = d.sales_order
LEFT JOIN SCM_OUTSOURCE_SHIP e ON a.ebeln = e.qr_code AND a.ebelp = e.order_no AND a.kdauf = e.order_seq
WHERE
    a.art = 'IE7181'
ORDER BY
    a.ebeln DESC,
    a.ebelp;