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Maybe this is the case in general, but a while back we did something that required flipping an array and when we did it with python inside Postgres it was sever

• scrollaway 6y ago
  This would make for a super interesting blog post / case study IMO, you should write about it even if it's just to showcase the two algorithms / comparisons.
  • aidos 6y ago
    Sorry, but late back but I’ve just found the code. It’s a bit of a weird case where I needed to reverse arrays inside a big json blob (millions of big json blobs). Trying to explode the structures out and rebuild them was a bit of a no-go. Instead I did a nasty little regex replace on the json string: re.sub('"key": \[([^\\]]+)\]', lambda match: '"key": [' + ', '.join(reversed(match.group(1).split(', '))) + "]", els) There might be a way of doing this in postgres these days (this was 3 or 4 years ago), but I'm not sure. At the time this was the best I could come up with and I was pretty surprised it worked as well as it did. Since then I've always installed the python extension whenever I set up a new postgres, just in case.
    • pyramation 6y ago
      for sure there are all sorts of postgres regex tools... You can likely do everything. The main limitations I found in plpgsql were in base encodings (that were missing), which is why I had to implement base32 from scratch. Besides that, it's pretty much a super powerful language