"The maximum total size of all input parameters is 5242880 bytes." Error message when using BigQuery remote function

Question

When calling a remote function on BigQuery, I get the following error The maximum total size of all input parameters is 5242880 bytes.. This error is undocumented (or my Googling ability is lacking). It is even more unexpected as the query that pop this error is as simple as it gets:

SELECT
  `remote_function`( payload ) AS results
FROM
  `source_table`

The error is definitely on BQ's side, as no error is observed on the cloud-function called.

How to proceed on such issue, I'm guessing that I'm hitting some kind of limit related to remote functions, but which one?

Answer 1

This limit is documented here.

Maximum input size 5 MB (The maximum total size of all input arguments from a single row is 5 MB.)