Node. JS accessing PostgreSQL database through ODBC

Node.js adopt ODBC visit PostgreSQL database

Node.js In addition to pg Module access PostgreSQL database , You can also use odbc Module access PostgreSQL database . Here are Windows Implementation under the operating system .

install PostgreSQL Of ODBC Support

First install PostgreSQL Of ODBC Support , Can be in ODBC Configure the database import in the configuration tool .

PostgreSQL Of ODBC Support can be downloaded from the official , Download at ：https://odbc.postgresql.org

Enter on the download page msi The catalog of

Find the latest to download

here X86 The suffix is to 32 The version used by the bit system ,X64 The suffix is to 64 The version used by the bit system , What is not marked is the integration of two versions .
After downloading the compressed package , Just install it directly ：

Set up ODBC introduce PostgreSQL database

We need to take what we have PostgreSQL The database is ODBC Configure in the tool , First, find it in the management tool of the control panel ODBC Data source management tools ：

Specific options 32 A still 64 Bit data source , Based on PostgreSQL The installed version is 32 A still 64 position ,PostgreSQL Of Windows The version is as follows ：

Choose here 64 Bit ODBC The data source tool opens , And carry on PostgreSQL Add database source ：

Then configure parameters in the pop-up configuration window ：

among ：
DataSource yes ODBC The reference name after the database ;
Description Free filling ;
Database It's the database name , That is to say PostgreSQL Management tools pgAdmin A database name in the following location

SSL Mode Is the safe mode selection , here disable that will do ;
Server It is to fill in the host where the database is located IP Address , It can be used locally 127.0.0.1;
Port It is to fill in the host where the database is located PostgreSQL Service access port ,PostgreSQL The default port during installation is 5432;
User Name Is the user name of database access ;
Password Is the password corresponding to the user name of database access ;
After configuration , You can click on the Test Carry out connection test , Click after success Save Button , To complete the setup . As shown below ：

close ODBC Data source configuration tool , In the back Node.js odbc Module installation .

Node.js odbc Module installation

Install well node.js after , In the newly created or selected directory, use the command line odbc Module installation ：

npm install odbc

or

npm install -g cnpm --registry=https://registry.npm.taobao.org
cnpm install odbc

Access database

Create... In the project directory js file , Like here. demo.js, Used to read a data table dbtest As well as in a data table DBDEMO Insert a record ：

demo.js:

const odbc = require('odbc');
 
async function myQuery() {
    const connectionConfig = {
        connectionString: 'DSN=PostgreSQL35W',
        connectionTimeout: 10,
        loginTimeout: 10,
    }
    const connection = await odbc.connect(connectionConfig);
    
    const result = await connection.query('SELECT * FROM dbtest');
    console.log(JSON.stringify(result));
    console.log(JSON.stringify(result));

    const result = await connection.query(`INSERT INTO "DBDEMO" ("INDEX", "CODE", "AUTH") VALUES('20220005', 'Insert', 'Test')`);
    console.log(JSON.stringify(result));

    console.log(JSON.stringify(result));
}
 
myQuery();

Execute code on the command line ：

node demo

give the result as follows ：

The red circle is dbtest The contents queried in the data table

and DBDEMO A record is also inserted into the data table

That's it node.js adopt odbc Module and connection access PostgreSQL database .

matters needing attention

In the use of Node.js visit PostgreSQL Database time , You need to pay attention to the case of database names and field names and the order of double quotation marks and single quotation marks . For specific analysis and solutions, see ： Node.js visit PostgreSQL Precautions and solutions , about Node.js use odbc Module or pg Module access PostgreSQL The problem and solution of database are the same .

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