On Tue, Mar 17, 2020 at 10:45:50AM -0400, Tom Lane wrote: > Don Seiler <don@xxxxxxxxx> writes: >> What are the ramifications of changing collation like that? Should we >> consider rebuilding indexes ASAP after that? > > Text indexes would definitely be at risk here. I'm not really certain > how bad the problem would be. Do you have a feeling for how much of > the data is 100% ASCII? If you could be sure of that for any given > column, you wouldn't have to reindex indexes on that column. There is no way to know how much indexes would get broken without having a look at it. Anything ASCII-based should be of no problem. If you have a doubt, reindexing evey index which includes text column data is the best course of action in my opinion if you have any doubts, because that's safe even if it has a higher cost. -- Michael
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