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nodejs链接oracle

windows下node-oracledb环境

在windows环境下, oracle一直是个麻烦事情,参考官方 环境搭建说明

原本就在电脑上安装了 oracle11g 数据库, VS2013 , python2.7 ,所以,我在环境变量下只需要再添加以下两个变量:

set OCI_LIB_DIR=D:/app/giscafer/product/11.2.0/dbhome_1/OCI/lib/MSVC
set OCI_INC_DIR=D:/app/giscafer/product/11.2.0/dbhome_1/OCI/include
npm install --save oracle 

nodejs链接oracle

oracle数据库连接

1、安装 node-oracledb 完成后,新建一个数据库配置文件 dbconfig.js

    
module.exports = {
user : process.env.NODE_ORACLEDB_USER || "scott",

// Instead of hard coding the password, consider prompting for it,
// passing it in an environment variable via process.env, or using
// External Authentication.
password : process.env.NODE_ORACLEDB_PASSWORD || "tiger",

// For information on connection strings see:
// https://github.com/oracle/node-oracledb/blob/master/doc/api.md#connectionstrings
connectString : process.env.NODE_ORACLEDB_CONNECTIONSTRING || "localhost/orcl",

// Setting externalAuth is optional. It defaults to false. See:
// https://github.com/oracle/node-oracledb/blob/master/doc/api.md#extauth
externalAuth : process.env.NODE_ORACLEDB_EXTERNALAUTH ? true : false
};

2、然后测试数据库连接,建个 connect.js 文件:

var oracledb = require('oracledb');
var dbConfig = require('./dbconfig.js');

oracledb.getConnection(
{
user : dbConfig.user,
password : dbConfig.password,
connectString : dbConfig.connectString
},
function(err, connection)
{

if (err) {
console.error(err.message);
return;
}
console.log('Connection was successful!');

connection.release(
function(err)
{

if (err) {
console.error(err.message);
return;
}
});
});

3、最后运行 connect.js ,成功会输出’Connection was successful!’信息

node connect.js 

查询表

1、 npm install --save async

2、新建 `select.js 文件,代码如下(sql语句修改为自己需要查询的表语句即可)

3、 node select.js 执行即可看到结果,结果分为数据和对象两种处理方式,比较简单

测试结果图:

nodejs链接oracle

var async = require('async');
var oracledb = require('oracledb');
var dbConfig = require('./dbconfig.js');

// Properties are applicable to all connections and SQL executions.
// They can also be set or overridden at the individual execute() call level
//
// This script sets outFormat in the execute() call but it could be set here instead:
// oracledb.outFormat = oracledb.OBJECT;

var doconnect = function(cb) {
oracledb.getConnection(
{
user : dbConfig.user,
password : dbConfig.password,
connectString : dbConfig.connectString
},
cb);
};

var dorelease = function(conn) {
conn.release(function (err) {
if (err)
console.error(err.message);
});
};

// Default Array Output Format
var doquery_array = function (conn, cb) {
conn.execute(
"SELECT location_id, city FROM locations WHERE city LIKE 'S%' ORDER BY city",
function(err, result)
{

if (err) {
return cb(err, conn);
} else {
console.log("----- Cities beginning with 'S' (default ARRAY output format) --------");
console.log(result.rows);
return cb(null, conn);
}
});
};

// Optional Object Output Format
var doquery_object = function (conn, cb) {
conn.execute(
"SELECT location_id, city FROM locations WHERE city LIKE 'S%' ORDER BY city",
{}, // A bind variable parameter is needed to disambiguate the following options parameter
// otherwise you will get Error: ORA-01036: illegal variable name/number
{ outFormat: oracledb.OBJECT }, // outFormat can be OBJECT or ARRAY. The default is ARRAY
function(err, result)
{

if (err) {
return cb(err, conn);
} else {
console.log("----- Cities beginning with 'S' (OBJECT output format) --------");
console.log(result.rows);
return cb(null, conn);
}
});
};

async.waterfall(
[
doconnect,
doquery_array,
doquery_object
],
function (err, conn) {
if (err) { console.error("In waterfall error cb: ==>", err, "<=="); }
if (conn)
dorelease(conn);
});

更多见官方提供的例子:

https://github.com/oracle/node-oracledb/tree/master/examples
原文  http://giscafer.com/2016/04/13/node-oracledb-demo/
正文到此结束
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