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2015/09/25

a DRY KISS

I've been working on a tool. I discussed a lot of it yesterday.

I had a model to get the information based on PI, and I wanted to get to what I considered the interesting bit, so it was only after the performance went from suck to SUCK that I dove back, which is what I did yesterday. Starting with the project instead of the PI made the whole thing easier. But now I'm stuck.

The only differences between these queries are on lines 14, 19 and 20. Which gets to the problem. I know that I don't need half of what I get in lines 1-11, but when I pull stuff out, I now have two places to pull it.

I have a great 90-line majesty of a query that includes six left joins, and I append different endings depending on whether I want to get everything, or a segment defined by A or B or something. I could probably tighten it up so I have SELECT FROM, the different blocks, then AND AND ORDER BY. But there we're adding complexity, and we're butting Don't Repeat Yourself (DRY) against Keep It Simple, Stupid (KISS).

I'm happy to keep it as-is, as a pair of multi-line variables inside my program. I think I'd rather have the two like this than gin up a way to give me both, so KISS over DRY, in part because I cannot imagine a third way I'd want to access this data, so we hit You Ain't Gonna Need It (YAGNI).

But if there's strong reasons why I should make the change, rather than package it up and put it in cron, feel free to tell me.