How to run schema creation sql script in mssql with nodejs? - sql-server

Question

I have my code deployed in Azure Function App and using NodeJS I am trying to execute a sql script on SQL Server database. To work this out I have used NPM package sqlcmd-runner.
Here is the code I am using:
module.exports.dumpScriptinDatabase = (dbConfig, context) => {
return new Promise((resolve, reject) => {
sqlcmd({
server: dbConfig.server,
database: dbConfig.options.database,
username: dbConfig.userName,
password: dbConfig.password,
encryptedConnection: true,
inputFiles: [`${__dirname}\\db.sql`]
})
.catch((error) => {
reject('Error dumping script!!')
})
.done(() => {
resolve('Dumping script completed.')
});
});
I am getting all the database details in dbConfig variable. Also db.sql creates the tables, views etc. in the schema.
The issue I am facing is this module never returns me error in case of failure and it also does not executes successfully. The server returns 502 error code on execution.
One thing I am able to debug is that the npm package code uses sqlcmd to execute the script.
Can someone help me on this?

Answer 1

So I've tested this using several source files, it's working ok, scripts are run successfully.
index.js
const dbConfig = require('./dbconfig.json');
const dumpScript = require('./dumpScript.js');
console.log('Running script');
dumpScript.dumpScriptinDatabase(dbConfig, 'context').then(() => {
console.log('Script complete');
}).catch ( (err) => {
console.error('Script error: ', err);
});
dumpScript.js
const sqlcmd = require('sqlcmd-runner');
module.exports.dumpScriptinDatabase = (dbConfig, context) => {
return sqlcmd({
server: dbConfig.server,
database: dbConfig.options.database,
username: dbConfig.userName,
password: dbConfig.password,
encryptedConnection: true,
inputFiles: [`${__dirname}\\db.sql`]
});
}
dbConfig.json
{
"server": "sql_server",
"options": {
"database": "test_db"
},
"userName": "user",
"password": "password"
}
I've simplified the dumpScript.js file, we can simply return the promise from the sqlcmd function rather than using .then and .catch.
We then handle this in index.js.
A couple of things I'd mention, you need the sqlcmd utility of a fairly recent version on PATH for this to work.
Also, you might need to modify the index.js script, I'm loading dbConfig from a .json file, you're probably doing something different.