- Add support for libpq functions to close prepared statements and portals
introduced in libpq v17 (:ticket:`#603`).
- The `!context` parameter of `sql` objects `~sql.Composable.as_string()` and
- `~sql.Composable.as_bytes()` methods is not optional (:ticket:`#716`).
+ `~sql.Composable.as_bytes()` methods is now optional (:ticket:`#716`).
- Disable receiving more than one result on the same cursor in pipeline mode,
to iterate through `~Cursor.nextset()`. The behaviour was different than
in non-pipeline mode and not totally reliable (:ticket:`#604`).