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Merge #743

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743: Fix finite pagination with placeholder search r=Kerollmops a=ManyTheFish

this bug is reproducible on real datasets and is hard to isolate in a simple test.

related to: https://github.com/meilisearch/meilisearch/issues/3200

poke `@curquiza` 

Co-authored-by: ManyTheFish <many@meilisearch.com>
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bors[bot] 2022-12-15 09:31:47 +00:00 committed by GitHub
commit 5114686394
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1 changed files with 16 additions and 11 deletions
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27
milli/src/search/criteria/initial.rs
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@ -39,19 +39,24 @@ impl<D: Distinct> Criterion for Initial<'_, D> {
self.answer
.take()
.map(|mut answer| {
if self.exhaustive_number_hits && answer.query_tree.is_some() {
if self.exhaustive_number_hits {
// resolve the whole query tree to retrieve an exhaustive list of documents matching the query.
// then remove the potential soft deleted documents.
let mut candidates = resolve_query_tree(
self.ctx,
answer.query_tree.as_ref().unwrap(),
params.wdcache,
)? - params.excluded_candidates;
let candidates = answer
.query_tree
.as_ref()
.map(|query_tree| resolve_query_tree(self.ctx, query_tree, params.wdcache))
.transpose()?;
// Apply the filters on the documents retrieved with the query tree.
if let Some(ref filtered_candidates) = answer.filtered_candidates {
candidates &= filtered_candidates;
}
// then intersect the candidates with the potential filtered candidates.
let mut candidates = match (candidates, answer.filtered_candidates.take()) {
(Some(candidates), Some(filtered)) => candidates & filtered,
(Some(candidates), None) => candidates,
(None, Some(filtered)) => filtered,
(None, None) => self.ctx.documents_ids()?,
};
// then remove the potential soft deleted documents.
candidates -= params.excluded_candidates;
// because the initial_candidates should be an exhaustive count of the matching documents,
// we precompute the distinct attributes.