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Fix the FacetStringLevelZeroRange range when unbounded

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Kerollmops 2021-06-23 17:05:57 +02:00
parent 757b2b502a
commit a7ae552ba7
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1 changed files with 36 additions and 12 deletions
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48
milli/src/search/facet/facet_string.rs
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@ -210,6 +210,7 @@ impl<'t> Iterator for FacetStringGroupRange<'t> {
/// It yields the facet string and the roaring bitmap associated with it.
pub struct FacetStringLevelZeroRange<'t> {
iter: RoRange<'t, FacetStringLevelZeroCodec, CboRoaringBitmapCodec>,
field_id: FieldId,
}
impl<'t> FacetStringLevelZeroRange<'t> {
@ -220,20 +221,43 @@ impl<'t> FacetStringLevelZeroRange<'t> {
left: Bound<&str>,
right: Bound<&str>,
) -> heed::Result<FacetStringLevelZeroRange<'t>> {
let db = db.remap_types::<FacetStringLevelZeroCodec, CboRoaringBitmapCodec>();
let left_bound = match left {
Included(left) => Included((field_id, left)),
Excluded(left) => Excluded((field_id, left)),
Unbounded => Included((field_id, "")),
};
fn encode_bound<'a>(
buffer: &'a mut Vec<u8>,
field_id: FieldId,
bound: Bound<&str>,
) -> Bound<&'a [u8]> {
match bound {
Included(value) => {
buffer.push(field_id);
buffer.push(0);
buffer.extend_from_slice(value.as_bytes());
Included(&buffer[..])
}
Excluded(value) => {
buffer.push(field_id);
buffer.push(0);
buffer.extend_from_slice(value.as_bytes());
Excluded(&buffer[..])
}
Unbounded => {
buffer.push(field_id);
buffer.push(1); // we must only get the level 0
Excluded(&buffer[..])
}
}
}
let right_bound = match right {
Included(right) => Included((field_id, right)),
Excluded(right) => Excluded((field_id, right)),
Unbounded => Excluded((field_id + 1, "")),
};
let mut left_buffer = Vec::new();
let mut right_buffer = Vec::new();
let left_bound = encode_bound(&mut left_buffer, field_id, left);
let right_bound = encode_bound(&mut right_buffer, field_id, right);
db.range(rtxn, &(left_bound, right_bound)).map(|iter| FacetStringLevelZeroRange { iter })
let iter = db
.remap_key_type::<ByteSlice>()
.range(rtxn, &(left_bound, right_bound))?
.remap_types::<FacetStringLevelZeroCodec, CboRoaringBitmapCodec>();
Ok(FacetStringLevelZeroRange { iter, field_id })
}
}