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Rewrite the STARTS WITH filter with the MultiOps trait

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Kerollmops 2023-05-16 10:58:57 +02:00
parent 72f4b8f9e9
commit d0ce1453a6
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1 changed files with 7 additions and 10 deletions
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17
milli/src/search/facet/filter.rs
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@ -7,7 +7,7 @@ pub use filter_parser::{Condition, Error as FPError, FilterCondition, Span, Toke
use heed::types::DecodeIgnore;
use heed::LazyDecode;
use memchr::memmem::{Finder, FinderRev};
use roaring::RoaringBitmap;
use roaring::{MultiOps, RoaringBitmap};
use serde_json::Value;
use super::facet_range_search;
@ -320,16 +320,13 @@ impl<'a> Filter<'a> {
return Ok(docids);
}
Condition::StartsWith(val) => {
// This can be implemented with the string level layers for a faster execution
let prefix = FacetGroupKey { field_id, level: 0, left_bound: val.value() };
// TODO use the roaring::MultiOps trait
let mut docids = RoaringBitmap::new();
for result in
strings_db.prefix_iter(rtxn, &prefix)?.remap_key_type::<DecodeIgnore>()
{
let ((), group_value) = result?;
docids |= group_value.bitmap;
}
let docids = strings_db
.prefix_iter(rtxn, &prefix)?
.remap_key_type::<DecodeIgnore>()
.map(|result| result.map(|(_, gv)| gv.bitmap))
.union()?;
return Ok(docids);
}
Condition::EndsWith(val) => {