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Merge #4939

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4939: Introduce the `STARTS WITH` filter operator r=irevoire a=Kerollmops

This PR fixes #4872 by introducing the `STARTS WITH` filter operator and gating it under the _contains filter_ experimental feature along with the `CONTAINS` one. I also updated [the experimental feature discussion page](https://github.com/orgs/meilisearch/discussions/763).

Co-authored-by: Clément Renault <clement@meilisearch.com>
This commit is contained in:
meili-bors[bot] 2024-09-18 10:19:48 +00:00 • committed by GitHub
commit ff523a2357
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9 changed files with 89 additions and 29 deletions
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20
milli/src/search/facet/filter.rs
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@ -12,7 +12,7 @@ use serde_json::Value;
use super::facet_range_search;
use crate::error::{Error, UserError};
use crate::heed_codec::facet::{
FacetGroupKey, FacetGroupKeyCodec, FacetGroupValueCodec, OrderedF64Codec,
FacetGroupKey, FacetGroupKeyCodec, FacetGroupValue, FacetGroupValueCodec, OrderedF64Codec,
};
use crate::index::db_name::FACET_ID_STRING_DOCIDS;
use crate::{
@ -336,6 +336,24 @@ impl<'a> Filter<'a> {
return Ok(docids);
}
Condition::StartsWith { keyword: _, word } => {
let value = crate::normalize_facet(word.value());
let base = FacetGroupKey { field_id, level: 0, left_bound: value.as_str() };
let docids = strings_db
.prefix_iter(rtxn, &base)?
.map(|result| -> Result<RoaringBitmap> {
match result {
Ok((_facet_group_key, FacetGroupValue { bitmap, .. })) => Ok(bitmap),
Err(_e) => Err(InternalError::from(SerializationError::Decoding {
db_name: Some(FACET_ID_STRING_DOCIDS),
})
.into()),
}
})
.union()?;
return Ok(docids);
}
};
let mut output = RoaringBitmap::new();