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Unexpected result from mariaDB connector for node in select count

Hi,

what is the reason that mariadb connector for node.js returns [ { num: 2n } ] instead of [ { num: 2 } ] to a query like this:

SELECT count(*) as num FROM tasks

This doesn't happen when using mysql2. This "n" is causing further errors in other libraries that I'm using.

I checked the list of options but I didn't find anyone that might change this behaviour.

Thank you

Answer Answered by Diego Dupin in this comment.

see https://github.com/mariadb-corporation/mariadb-connector-nodejs/blob/master/documentation/promise-api.md#migrating-from-2x-or-mysqlmysql2-to-3x

javascript integer are safe until some limit (2^53). Resultset that return integer since 3.0 return a javascript BigInt (https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt). Resultset are now safe.

To permit compatibility, options `insertIdAsNumber`, `decimalAsNumber` and `bigIntAsNumber` can be set to return unsafe value.

It can be done at connection level or query level. Example: const conn = await mariadb.createConnection({ host: 'mydb.com', user: 'myUser', password: 'myPwd', bigIntAsNumber: true, decimalAsNumber: true, bigIntAsNumber: true });

or for a specific query: const res = await conn.query({ sql:'SELECT count(*) as num FROM tasks', bigIntAsNumber: true, decimalAsNumber: true, bigIntAsNumber: true});

for this particular example "SELECT count(*) as num FROM tasks" count would never reach 9007199254740991

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