I'm not the author but I'd guess almost nothing. Basically you just need to calc... | Hacker News

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		_uhtu on Nov 26, 2016 \| parent \| context \| favorite \| on: Let Postgres Do the Work (2013) I'm not the author but I'd guess almost nothing. Basically you just need to calculate the result of the function and index it by the result, should be almost completely unnoticeable.

zerd on Nov 28, 2016 [–]

Unless it's a table with high write load. You're basically shifting the expensive part from read time to write time.

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