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Speed-up facet aggregation on low number of candidates

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Clément Renault 2021-01-03 14:11:00 +01:00 committed by Kerollmops
parent a17bb54d8f
commit 3916c54501
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1 changed files with 91 additions and 38 deletions
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129
src/search/facet/facet_distribution.rs
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@ -2,11 +2,13 @@ use std::collections::{HashSet, HashMap};
use std::{cmp, fmt};
use std::ops::Bound::Unbounded;
use ordered_float::OrderedFloat;
use roaring::RoaringBitmap;
use serde_json::Value;
use crate::facet::FacetType;
use crate::heed_codec::facet::{FacetValueStringCodec, FacetLevelValueF64Codec, FacetLevelValueI64Codec};
use crate::heed_codec::facet::{FieldDocIdFacetStringCodec, FieldDocIdFacetF64Codec, FieldDocIdFacetI64Codec};
use crate::search::facet::FacetRange;
use crate::{Index, FieldId};
@ -38,47 +40,98 @@ impl<'a> FacetDistribution<'a> {
self
}
fn facet_values(&self, field_id: FieldId, field_type: FacetType) -> heed::Result<Vec<Value>> {
let db = self.index.facet_field_id_value_docids;
let iter = match field_type {
FacetType::String => {
let iter = db
.prefix_iter(&self.rtxn, &[field_id])?
.remap_key_type::<FacetValueStringCodec>()
.map(|r| r.map(|((_, v), docids)| (Value::from(v), docids)));
Box::new(iter) as Box::<dyn Iterator<Item=_>>
},
FacetType::Integer => {
let db = db.remap_key_type::<FacetLevelValueI64Codec>();
let range = FacetRange::<i64, _>::new(
self.rtxn, db, field_id, 0, Unbounded, Unbounded,
)?;
Box::new(range.map(|r| r.map(|((_, _, v, _), docids)| (Value::from(v), docids))))
},
FacetType::Float => {
let db = db.remap_key_type::<FacetLevelValueF64Codec>();
let range = FacetRange::<f64, _>::new(
self.rtxn, db, field_id, 0, Unbounded, Unbounded,
)?;
Box::new(range.map(|r| r.map(|((_, _, v, _), docids)| (Value::from(v), docids))))
},
};
let mut facet_values = Vec::new();
for result in iter {
let (value, docids) = result?;
match &self.candidates {
Some(candidates) => if !docids.is_disjoint(candidates) {
facet_values.push(value);
fn facet_values(&self, field_id: FieldId, facet_type: FacetType) -> heed::Result<Vec<Value>> {
if let Some(candidates) = self.candidates.as_ref().filter(|c| c.len() <= 1000) {
let mut key_buffer = vec![field_id];
match facet_type {
FacetType::Float => {
let mut facet_values = HashSet::new();
for docid in candidates {
key_buffer.truncate(1);
key_buffer.extend_from_slice(&docid.to_be_bytes());
let iter = self.index.field_id_docid_facet_values
.prefix_iter(self.rtxn, &key_buffer)?
.remap_key_type::<FieldDocIdFacetF64Codec>();
for result in iter {
let ((_, _, value), ()) = result?;
facet_values.insert(OrderedFloat(value));
}
}
Ok(facet_values.into_iter().map(|f| Value::from(*f)).collect())
},
FacetType::Integer => {
let mut facet_values = HashSet::new();
for docid in candidates {
key_buffer.truncate(1);
key_buffer.extend_from_slice(&docid.to_be_bytes());
let iter = self.index.field_id_docid_facet_values
.prefix_iter(self.rtxn, &key_buffer)?
.remap_key_type::<FieldDocIdFacetI64Codec>();
for result in iter {
let ((_, _, value), ()) = result?;
facet_values.insert(value);
}
}
Ok(facet_values.into_iter().map(Value::from).collect())
},
FacetType::String => {
let mut facet_values = HashSet::new();
for docid in candidates {
key_buffer.truncate(1);
key_buffer.extend_from_slice(&docid.to_be_bytes());
let iter = self.index.field_id_docid_facet_values
.prefix_iter(self.rtxn, &key_buffer)?
.remap_key_type::<FieldDocIdFacetStringCodec>();
for result in iter {
let ((_, _, value), ()) = result?;
facet_values.insert(value);
}
}
Ok(facet_values.into_iter().map(Value::from).collect())
},
None => facet_values.push(value),
}
if facet_values.len() == self.max_values_by_facet {
break;
}
}
} else {
let db = self.index.facet_field_id_value_docids;
let iter = match facet_type {
FacetType::String => {
let iter = db
.prefix_iter(&self.rtxn, &[field_id])?
.remap_key_type::<FacetValueStringCodec>()
.map(|r| r.map(|((_, v), docids)| (Value::from(v), docids)));
Box::new(iter) as Box::<dyn Iterator<Item=_>>
},
FacetType::Integer => {
let db = db.remap_key_type::<FacetLevelValueI64Codec>();
let range = FacetRange::<i64, _>::new(
self.rtxn, db, field_id, 0, Unbounded, Unbounded,
)?;
Box::new(range.map(|r| r.map(|((_, _, v, _), docids)| (Value::from(v), docids))))
},
FacetType::Float => {
let db = db.remap_key_type::<FacetLevelValueF64Codec>();
let range = FacetRange::<f64, _>::new(
self.rtxn, db, field_id, 0, Unbounded, Unbounded,
)?;
Box::new(range.map(|r| r.map(|((_, _, v, _), docids)| (Value::from(v), docids))))
},
};
Ok(facet_values)
let mut facet_values = Vec::new();
for result in iter {
let (value, docids) = result?;
match &self.candidates {
Some(candidates) => if !docids.is_disjoint(candidates) {
facet_values.push(value);
},
None => facet_values.push(value),
}
if facet_values.len() == self.max_values_by_facet {
break;
}
}
Ok(facet_values)
}
}
pub fn execute(&self) -> heed::Result<HashMap<String, Vec<Value>>> {