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Simplify the merge functions

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Clément Renault 2020-11-13 14:33:53 +01:00
parent 8ae9888959
commit 4e5e55c21a
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GPG Key ID: 92ADA4E935E71FA4
1 changed files with 34 additions and 22 deletions
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56
src/update/index_documents/merge_function.rs
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@ -29,23 +29,13 @@ pub fn main_merge(key: &[u8], values: &[Cow<[u8]>]) -> anyhow::Result<Vec<u8>> {
ensure!(values.windows(2).all(|vs| vs[0] == vs[1]), "fields ids map doesn't match"); ensure!(values.windows(2).all(|vs| vs[0] == vs[1]), "fields ids map doesn't match");
Ok(values[0].to_vec()) Ok(values[0].to_vec())
}, },
DOCUMENTS_IDS_KEY => word_docids_merge(&[], values), DOCUMENTS_IDS_KEY => roaring_bitmap_merge(values),
otherwise => bail!("wut {:?}", otherwise), otherwise => bail!("wut {:?}", otherwise),
} }
} }
pub fn word_docids_merge(_key: &[u8], values: &[Cow<[u8]>]) -> anyhow::Result<Vec<u8>> { pub fn word_docids_merge(_key: &[u8], values: &[Cow<[u8]>]) -> anyhow::Result<Vec<u8>> {
let (head, tail) = values.split_first().unwrap(); roaring_bitmap_merge(values)
let mut head = RoaringBitmap::deserialize_from(&head[..])?;
for value in tail {
let bitmap = RoaringBitmap::deserialize_from(&value[..])?;
head.union_with(&bitmap);
}
let mut vec = Vec::with_capacity(head.serialized_size());
head.serialize_into(&mut vec)?;
Ok(vec)
} }
pub fn docid_word_positions_merge(key: &[u8], _values: &[Cow<[u8]>]) -> anyhow::Result<Vec<u8>> { pub fn docid_word_positions_merge(key: &[u8], _values: &[Cow<[u8]>]) -> anyhow::Result<Vec<u8>> {
@ -53,17 +43,11 @@ pub fn docid_word_positions_merge(key: &[u8], _values: &[Cow<[u8]>]) -> anyhow::
} }
pub fn words_pairs_proximities_docids_merge(_key: &[u8], values: &[Cow<[u8]>]) -> anyhow::Result<Vec<u8>> { pub fn words_pairs_proximities_docids_merge(_key: &[u8], values: &[Cow<[u8]>]) -> anyhow::Result<Vec<u8>> {
let (head, tail) = values.split_first().unwrap(); cbo_roaring_bitmap_merge(values)
let mut head = CboRoaringBitmapCodec::deserialize_from(&head[..])?; }
for value in tail { pub fn facet_field_value_docids_merge(_key: &[u8], values: &[Cow<[u8]>]) -> anyhow::Result<Vec<u8>> {
let bitmap = CboRoaringBitmapCodec::deserialize_from(&value[..])?; cbo_roaring_bitmap_merge(values)
head.union_with(&bitmap);
}
let mut vec = Vec::new();
CboRoaringBitmapCodec::serialize_into(&head, &mut vec)?;
Ok(vec)
} }
pub fn documents_merge(key: &[u8], _values: &[Cow<[u8]>]) -> anyhow::Result<Vec<u8>> { pub fn documents_merge(key: &[u8], _values: &[Cow<[u8]>]) -> anyhow::Result<Vec<u8>> {
@ -85,3 +69,31 @@ pub fn merge_two_obkvs(base: obkv::KvReader, update: obkv::KvReader, buffer: &mu
writer.finish().unwrap(); writer.finish().unwrap();
} }
fn roaring_bitmap_merge(values: &[Cow<[u8]>]) -> anyhow::Result<Vec<u8>> {
let (head, tail) = values.split_first().unwrap();
let mut head = RoaringBitmap::deserialize_from(&head[..])?;
for value in tail {
let bitmap = RoaringBitmap::deserialize_from(&value[..])?;
head.union_with(&bitmap);
}
let mut vec = Vec::with_capacity(head.serialized_size());
head.serialize_into(&mut vec)?;
Ok(vec)
}
fn cbo_roaring_bitmap_merge(values: &[Cow<[u8]>]) -> anyhow::Result<Vec<u8>> {
let (head, tail) = values.split_first().unwrap();
let mut head = CboRoaringBitmapCodec::deserialize_from(&head[..])?;
for value in tail {
let bitmap = CboRoaringBitmapCodec::deserialize_from(&value[..])?;
head.union_with(&bitmap);
}
let mut vec = Vec::new();
CboRoaringBitmapCodec::serialize_into(&head, &mut vec)?;
Ok(vec)
}