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Introduce the highest_iter private method on the FacetStringIter struct

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This commit is contained in:
Kerollmops 2021-08-17 10:41:11 +02:00
parent 64df159057
commit 1c604de158
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1 changed files with 39 additions and 31 deletions
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70
milli/src/search/facet/facet_string.rs
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@ -299,7 +299,15 @@ impl<'t> FacetStringIter<'t> {
field_id: FieldId,
documents_ids: RoaringBitmap,
) -> heed::Result<FacetStringIter<'t>> {
FacetStringIter::new(rtxn, index, field_id, documents_ids, true)
let db = index.facet_id_string_docids.remap_types::<ByteSlice, ByteSlice>();
let highest_iter = Self::highest_iter(rtxn, index, db, field_id)?;
Ok(FacetStringIter {
rtxn,
db,
field_id,
level_iters: vec![(documents_ids, highest_iter)],
must_reduce: true,
})
}
pub fn new_non_reducing(
@ -307,43 +315,15 @@ impl<'t> FacetStringIter<'t> {
index: &'t Index,
field_id: FieldId,
documents_ids: RoaringBitmap,
) -> heed::Result<FacetStringIter<'t>> {
FacetStringIter::new(rtxn, index, field_id, documents_ids, false)
}
fn new(
rtxn: &'t heed::RoTxn,
index: &'t Index,
field_id: FieldId,
documents_ids: RoaringBitmap,
must_reduce: bool,
) -> heed::Result<FacetStringIter<'t>> {
let db = index.facet_id_string_docids.remap_types::<ByteSlice, ByteSlice>();
let highest_level = Self::highest_level(rtxn, db, field_id)?.unwrap_or(0);
let highest_iter = match NonZeroU8::new(highest_level) {
Some(highest_level) => Left(FacetStringGroupRange::new(
rtxn,
index.facet_id_string_docids,
field_id,
highest_level,
Unbounded,
Unbounded,
)?),
None => Right(FacetStringLevelZeroRange::new(
rtxn,
index.facet_id_string_docids,
field_id,
Unbounded,
Unbounded,
)?),
};
let highest_iter = Self::highest_iter(rtxn, index, db, field_id)?;
Ok(FacetStringIter {
rtxn,
db,
field_id,
level_iters: vec![(documents_ids, highest_iter)],
must_reduce,
must_reduce: false,
})
}
@ -359,6 +339,34 @@ impl<'t> FacetStringIter<'t> {
.transpose()?
.map(|(key_bytes, _)| key_bytes[2])) // the level is the third bit
}
fn highest_iter<X, Y>(
rtxn: &'t heed::RoTxn,
index: &'t Index,
db: Database<X, Y>,
field_id: FieldId,
) -> heed::Result<Either<FacetStringGroupRange<'t>, FacetStringLevelZeroRange<'t>>> {
let highest_level = Self::highest_level(rtxn, db, field_id)?.unwrap_or(0);
match NonZeroU8::new(highest_level) {
Some(highest_level) => FacetStringGroupRange::new(
rtxn,
index.facet_id_string_docids,
field_id,
highest_level,
Unbounded,
Unbounded,
)
.map(Left),
None => FacetStringLevelZeroRange::new(
rtxn,
index.facet_id_string_docids,
field_id,
Unbounded,
Unbounded,
)
.map(Right),
}
}
}
impl<'t> Iterator for FacetStringIter<'t> {