Node.js Related Issues

The Node.js Related Issues page describes how to resolve the following common issues:

Preventing Heap Out of Memory Errors

Some workloads may cause Node.JS to fail with the error:

FATAL ERROR: CALL_AND_RETRY_LAST Allocation failed - JavaScript heap out of memory

To prevent this error, modify the heap size configuration by setting the --max-old-space-size run flag.

For example, set the space size to 2GB:

$ node --max-old-space-size=2048 my-application.js

Providing Support for BIGINT Data Type

The Node.JS connector supports fetching BIGINT values from SQream DB. However, some applications may encounter an error when trying to serialize those values.

The error that appears is: .. code-block:: none

TypeError: Do not know how to serialize a BigInt

This is because JSON specification do not support BIGINT values, even when supported by Javascript engines.

To resolve this issue, objects with BIGINT values should be converted to string before serializing, and converted back after deserializing.

For example:

const rows = [{test: 1n}]
const json = JSON.stringify(rows, , (key, value) =>
  typeof value === 'bigint'
      ? value.toString()
      : value // return everything else unchanged
));
console.log(json); // [{"test": "1"}]