Question

我正在运行Node 8.9.4，Hapi 17.4和Oracledb 2.2。

尝试调用存储过程时，出现错误“ NJS-012：在参数2中遇到无效的绑定数据类型”。我无能为力似乎无法解决此问题。调用该过程的代码是：

async function getSavedViews(req, h, server) {
    let connection = await server.app.db.getConnection();

    let bindVars = {
        P_USER_NAME:   req.payload.user_name,
        P_CONTENT_TYPE: req.payload.content_type,
        P_PROJECT_NUMBER: req.payload.project_number,
        OP_GRID_TAB_TYP: { dir: server.app.db.BIND_OUT, type: server.app.db.ARRAY } 
    }

    let res = server.methods.response();

    try {
        res.error = false;
        res.msg = "Retrieved saved views.";
        res.data = await connection.execute(
            `BEGIN APPS.XXETA_GRID_USER_CONTEXT_PKG.EXTRACT_GRID_DETAILS(:P_USER_NAME, :P_CONTENT_TYPE, :P_PROJECT_NUMBER, :OP_GRID_TAB_TYP); END;`,
            bindVars
        );
    } catch (err) {
        server.app.logger.error(err.message);
        res.error = true;
        res.msg = err.message,
        res.data = [];
    }

    return res;
}

存储过程描述为：

我从记录器中得到的错误是：2018-08-06 15:02:20错误NJS-012：在参数2中遇到无效的绑定数据类型

任何帮助将不胜感激。

更新：

作为绑定变量的复杂类型看起来像这样...

CREATE OR REPLACE TYPE XXETA_GRID_CONTEXT_REC_TYP AS OBJECT
   (
        GRID_VIEW_ID NUMBER (15),
        GRID_VIEW_NAME VARCHAR2 (240),
        USER_NAME VARCHAR2 (30),
        PROJECT_NUMBER  VARCHAR2 (5)
   )

Answer 1

当前不支持复杂类型。您指定的出站绑定属于此类别。在直接支持此类之前，您需要添加一些包装器代码以将复杂类型分解为一个或多个简单类型。我在这里展示一个例子： https://jsao.io/2017/01/plsql-record-types-and-the-node-js-driver/

该文章的目标是调用一个存储过程，该存储过程接受自定义记录类型的数组。要调用它，我首先必须声明一些要绑定到的简单数组类型。然后，我可以使用这些数组创建更复杂的数组并调用该过程。

在您的情况下，您需要做相反的事情。在PL / SQL块中，声明一个APPS.XXETA_GRID_CONTEXT_TAB_TYP类型的局部变量。然后，在调用该过程之后，遍历数组，并使用它来填充一些简单的数组（VARCHAR2，NUMBER或DATE），并将其用作外部绑定。

更新：

提供了以下对象：

create or replace type xxeta_grid_context_rec_typ as object (
  grid_view_id   number(15),
  grid_view_name varchar2(240),
  user_name      varchar2(30),
  project_number varchar2(5)
)
/

create or replace type xxeta_grid_context_tab_typ as table of xxeta_grid_context_rec_typ
/

create or replace package xxeta_grid_user_context_pkg
as

procedure extract_grid_details(
  p_user_name      in varchar2,
  p_content_type   in varchar2,
  p_project_number in varchar2,
  op_grid_tab_typ  out xxeta_grid_context_tab_typ
);

end;
/

create or replace package body xxeta_grid_user_context_pkg
as

procedure extract_grid_details(
  p_user_name      in varchar2,
  p_content_type   in varchar2,
  p_project_number in varchar2,
  op_grid_tab_typ  out xxeta_grid_context_tab_typ
)

is

  l_xxeta_grid_context_rec xxeta_grid_context_rec_typ;

begin

  op_grid_tab_typ := xxeta_grid_context_tab_typ();

  for x in 1 .. 3
  loop
    l_xxeta_grid_context_rec := xxeta_grid_context_rec_typ(
      grid_view_id   => x,
      grid_view_name => 'Some Grid View',
      user_name      => p_user_name,
      project_number => p_project_number
    );

    op_grid_tab_typ.extend();

    op_grid_tab_typ(x) := l_xxeta_grid_context_rec;
  end loop;

end;

end;
/

以下Node.js代码可以调用存储过程并从complex out参数获取值。

const oracledb = require('oracledb');
const config = require('./dbConfig.js');

async function runTest() {
  let conn;

  try {
    const userName = 'Jane Doe';
    const contentType = 'Some Content Type';
    const projectNumber = '123';

    // This is what we want to populate with records/objects that come out
    // of the procedure.
    const gridContexts = [];

    // We start by declaring some other arrays, one for each field in the
    // xxeta_grid_context_rec_typ type.
    const gridViewIds = [];
    const gridViewNames = [];
    const userNames = [];
    const projectNumbers = []; 

    conn = await oracledb.getConnection(config);

    // Then we execute the procedure with a little wrapper code to populate
    // the individual arrays.
    let result = await conn.execute(
     `declare

        -- This is a local variable that you'll use to get the out data from
        -- the procedure.
        l_xxeta_grid_context_tab xxeta_grid_context_tab_typ;

      begin

        xxeta_grid_user_context_pkg.extract_grid_details(
          p_user_name      => :user_name,
          p_content_type   => :content_type,
          p_project_number => :project_number,
          op_grid_tab_typ  => l_xxeta_grid_context_tab
        );

        -- Now that the local variable is populated, iterate over it to
        -- populate the individual out binds.
        for x in 1 .. l_xxeta_grid_context_tab.count
        loop
          :grid_view_ids(x) := l_xxeta_grid_context_tab(x).grid_view_id;
          :grid_view_names(x) := l_xxeta_grid_context_tab(x).grid_view_name;
          :user_names(x) := l_xxeta_grid_context_tab(x).user_name;
          :project_numbers(x) := l_xxeta_grid_context_tab(x).project_number;
        end loop;

      end;`,
      {
        user_name: userName,
        content_type: contentType,
        project_number: projectNumber,
        grid_view_ids: {
          dir: oracledb.BIND_OUT,
          type: oracledb.NUMBER,
          maxArraySize: 200
        },
        grid_view_names: {
          dir: oracledb.BIND_OUT,
          type: oracledb.STRING,
          maxArraySize: 200
        },
        user_names: {
          dir: oracledb.BIND_OUT,
          type: oracledb.STRING,
          maxArraySize: 200
        },
        project_numbers: {
          dir: oracledb.BIND_OUT,
          type: oracledb.STRING,
          maxArraySize: 200
        }
      }
    );

    // At this point you can access the individual arrays to populate the 
    // original target array with objects. This is optional, you can work
    // with the individual arrays directly as well.
    for (let x = 0; x < result.outBinds.grid_view_ids.length; x += 1) {
      gridContexts.push({
        gridViewId: result.outBinds.grid_view_ids[x],
        gridViewName: result.outBinds.grid_view_names[x],
        userName: result.outBinds.user_names[x],
        projectNumber: result.outBinds.project_numbers[x]
      });
    }

    console.log(gridContexts);
  } catch (err) {
    console.error(err);
  } finally {
    if (conn) {
      try {
        await conn.close();
      } catch (err) {
        console.error(err);
      }
    }
  }
}

runTest();

希望对您有所帮助！对复杂类型的直接支持在增强功能列表中，只是不能说它何时发布。

执行存储过程NJS-012时，node-oracledb错误

1 个答案: