A recent thread gave me the idea that it would be convenient to have another flag for `regexp_matches` to make it return a singular two-dimensional array of matches when performing a global match.
Why? Well, basically you avoid having to aggregate the rows afterwards using by wrapping it in a subquery. Is there some interest in this? The idea is to add a new flag `a` that would imply `g` internally when performing the match, but then return an array, instead of a set. Or more accurately it will return a set that will always have exactly one array. The array would be empty if no matches are found, or would contain arrays of match results otherwise. I have not looked into implementing this yet, but I may have time in 8-9 days or so. For now, I'm just looking if there's support or opposition to the idea.
