Re: Difference between C and en_US.UTF-8 Collate & CType inPostgres 10.x

Debraj Manna wrote:
> Can someone let me know what is the difference we are expected to observe if we set
> Collate & Ctype to C as against  en_US.UTF-8 with encoding set to UTF8 in both the cases ?

For one, the ordering will be substantially different.

Compare the result of these two queries:

SELECT chr(i) FROM generate_series(1, 50000) i ORDER BY chr(i) COLLATE "C";
SELECT chr(i) FROM generate_series(1, 50000) i ORDER BY chr(i) COLLATE "en_US.utf8";

Yours,
Laurenz Albe