The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/16/sql-insert.html
Description:
The grammar
[ RETURNING * | output_expression [ [ AS ] output_name ] [, ...] ]
seems wrong to me. I appears to say it could be either
RETURNING *
or
output_expression [ [ AS ] output_name ] [, ...]
but I believe the RETURNING is always required.