jian he writes:
> CREATE COLLATION case_insensitive (provider = icu, locale =
> '@colStrength=secondary', deterministic = false);
> SELECT 'a' = 'A' COLLATE case_insensitive;
> CREATE DOMAIN d1 as text collate case_insensitive check (value <> 'a');
> SELECT 'A'::d1;
> ``SELECT 'A'::d1`` should er
hi.
CREATE COLLATION case_insensitive (provider = icu, locale =
'@colStrength=secondary', deterministic = false);
SELECT 'a' = 'A' COLLATE case_insensitive;
CREATE DOMAIN d1 as text collate case_insensitive check (value <> 'a');
SELECT 'A'::d1;
``SELECT 'A'::d1`` should error out as domain check
