The `=like`/`like` domain operators are accent-insensitive, but still
case-sensitive. This is not really coherent, since `unaccent` is a best
effort to find records from the client, and it is the same idea behind
being case-insensitive. Also, `=like`/`like` cannot be used from the web
client, and we use them in domain to search from the Python side.
Moreover, adding `unaccent` to `=like` can be very inefficient when
searching for a prefix ('prefix%'). In fact, PostgreSQL can use btree
index to find prefix matches, but because we create dy default btree
index without unaccent (when we put
`index=True/'btree'/'btree_not_null'` on the field), PostgreSQL cannot
use this index.
Part-of: odoo/odoo#136007
Rémy Voet (ryv)
51a795d363