node.js - 执行存储过程时出现node-oracledb错误NJS-012

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，收到错误“NJS-012:在参数 2 中遇到无效的绑定(bind)数据类型”。我所做的一切似乎都无法解决这个问题。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:

我从记录器收到的错误是:2018-08-06 15:02:20 ERROR NJS-012:在参数 2 中遇到无效的绑定(bind)数据类型

如有任何帮助，我们将不胜感激。

更新:

作为绑定(bind)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

2019/08/28更新:

Node-oracledb 在 v4 中添加了对 SQL 对象类型和 PL/SQL 记录类型的支持(2019/07/25 发布)。有关详细信息，请参阅文档的此部分: https://oracle.github.io/node-oracledb/doc/api.html#objects

鉴于与前面列出的完全相同的对象，现在可以使用以下 JavaScript 来完成这项工作，并且代码行数比以前少得多:

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

async function runTest() {
  let conn;

  try {  
    const sql = 
     `call xxeta_grid_user_context_pkg.extract_grid_details(
        p_user_name      => :P_USER_NAME,
        p_content_type   => :P_CONTENT_TYPE,
        p_project_number => :P_PROJECT_NUMBER,
        op_grid_tab_typ  => :OP_GRID_TAB_TYP
      )`;

    const binds = {
      P_USER_NAME: 'Jane Doe',
      P_CONTENT_TYPE: 'Some Content Type',
      P_PROJECT_NUMBER: '123',
      OP_GRID_TAB_TYP: {
        dir: oracledb.BIND_OUT,
        type: 'HR.XXETA_GRID_CONTEXT_TAB_TYP'
      } 
    }

    conn = await oracledb.getConnection(config);

    const result = await conn.execute(
      sql,
      binds
    );

    const gridContexts = [];

    for (let x = 0; x < result.outBinds.OP_GRID_TAB_TYP.length; x += 1) {
      gridContexts.push({
        gridViewId: result.outBinds.OP_GRID_TAB_TYP[x].GRID_VIEW_ID,
        gridViewName: result.outBinds.OP_GRID_TAB_TYP[x].GRID_VIEW_NAME,
        userName: result.outBinds.OP_GRID_TAB_TYP[x].USER_NAME,
        projectNumber: result.outBinds.OP_GRID_TAB_TYP[x].PROJECT_NUMBER
      });
    }

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

runTest();

上一个答案:

当前不支持复杂类型。您指定的出局绑定(bind)属于这一类。在直接支持此类类型之前，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。我在这里展示了一个例子: https://jsao.io/2017/01/plsql-record-types-and-the-node-js-driver/

该文章的目标是调用一个接受自定义记录类型数组的存储过程。要调用它，我首先必须声明一些要绑定(bind)的简单数组类型。然后我可以使用这些数组来创建更复杂的数组并调用该过程。

就您的情况而言，您需要执行相反的操作。在 PL/SQL block 中，声明 APPS.XXETA_GRID_CONTEXT_TAB_TYP 类型的局部变量。然后，在调用该过程后，迭代该数组并使用它来填充一些简单数组(VARCHAR2、NUMBER 或 DATE)并将它们用作您的输出绑定(bind)。

更新:

假设您有以下对象:

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复杂的输出参数中获取值。

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();

希望有帮助!对复杂类型的直接支持已在增强列表中，只是不能说何时会落地。