Um, no. Columnar compression can be huge if your data can be sorted favorably. You basically get to filter (both compare and skip) and aggregate without fully d

Um, no. Columnar compression can be huge if your data can be sorted favorably. You basically get to filter (both compare and skip) and aggregate without fully decompressing. If you have to scan a column (or a few), this can be huge. It's great if you can skip blocks within the column or entire shards, but that's unlikely to happen unless you're doing a highly selective query. OLAP queries aggregate a ton of data. Judiciously chosen column compression scheme coupled with a good sort order can be a huge, huge advantage.