Internal error on NEST when not flattening results

Question

I\'m trying to GROUP and return a repeated field into a new table

SELECT url, NEST(label) AS labels
FROM [mytable]
GROUP EACH BY url

It wor

Answer 1

NEST is unfortunately incompatible with unflattened results, as also mentioned here.

A workaround that might work for you is using SPLIT(GROUP_CONCAT(label)) instead of using NEST. That should work if your label field is of type string. You may need to choose an explicit separator for GROUP_CONCAT if your labels contain commas, but I think this solution should be workable.