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set max typos on ngram to 1

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mpostma
2022-01-20 18:34:54 +01:00
committed by ad hoc
parent 38d23546a5
commit 642c01d0dc
1 changed files with 10 additions and 7 deletions
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17
milli/src/search/query_tree.rs
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@@ -260,12 +260,12 @@ fn split_best_frequency(ctx: &impl Context, word: &str) -> heed::Result<Option<O
/// Return the `QueryKind` of a word depending on `authorize_typos`
/// and the provided word length.
fn typos(word: String, authorize_typos: bool) -> QueryKind {
fn typos(word: String, authorize_typos: bool, max_typos: u8) -> QueryKind {
if authorize_typos {
match word.chars().count() {
0..=4 => QueryKind::exact(word),
5..=8 => QueryKind::tolerant(1, word),
_ => QueryKind::tolerant(2, word),
5..=8 => QueryKind::tolerant(1.min(max_typos), word),
_ => QueryKind::tolerant(2.min(max_typos), word),
}
} else {
QueryKind::exact(word)
@@ -316,8 +316,10 @@ fn create_query_tree(
if let Some(child) = split_best_frequency(ctx, &word)? {
children.push(child);
}
children
.push(Operation::Query(Query { prefix, kind: typos(word, authorize_typos) }));
children.push(Operation::Query(Query {
prefix,
kind: typos(word, authorize_typos, 2),
}));
Ok(Operation::or(false, children))
}
// create a CONSECUTIVE operation wrapping all word in the phrase
@@ -363,8 +365,9 @@ fn create_query_tree(
.collect();
let mut operations = synonyms(ctx, &words)?.unwrap_or_default();
let concat = words.concat();
let query =
Query { prefix: is_prefix, kind: typos(concat, authorize_typos) };
let query = Query { prefix: is_prefix, kind: typos(concat, true, 1) };
// let query =
// Query { prefix: is_prefix, kind: typos(concat, authorize_typos) };
operations.push(Operation::Query(query));
and_op_children.push(Operation::or(false, operations));
}