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Nov 13, 2025
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Add n-gram kqp tests #28636

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616b9cd
Add n-gram kqp tests
stebloev Nov 11, 2025
dbc8196
Use lowercase filter
stebloev Nov 13, 2025
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93 changes: 93 additions & 0 deletions ydb/core/kqp/ut/indexes/kqp_indexes_fulltext_ut.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,25 @@ void AddIndex(NQuery::TQueryClient& db) {
UNIT_ASSERT_VALUES_EQUAL_C(result.GetStatus(), EStatus::SUCCESS, result.GetIssues().ToString());
}

void AddIndexNGram(NQuery::TQueryClient& db, const size_t nGramMinLength = 3, const size_t nGramMaxLength = 3, const bool edgeNGram = false) {
const TString query = Sprintf(R"sql(
ALTER TABLE `/Root/Texts` ADD INDEX fulltext_idx
GLOBAL USING fulltext
ON (Text)
WITH (
layout=flat,
tokenizer=standard,
use_filter_lowercase=true,
use_filter_ngram=%d,
use_filter_edge_ngram=%d,
filter_ngram_min_length=%d,
filter_ngram_max_length=%d
);
)sql", !edgeNGram, edgeNGram, nGramMinLength, nGramMaxLength);
auto result = db.ExecuteQuery(query, NYdb::NQuery::TTxControl::NoTx()).ExtractValueSync();
UNIT_ASSERT_VALUES_EQUAL_C(result.GetStatus(), EStatus::SUCCESS, result.GetIssues().ToString());
}

void AddIndexCovered(NQuery::TQueryClient& db) {
TString query = R"sql(
ALTER TABLE `/Root/Texts` ADD INDEX fulltext_idx
Expand Down Expand Up @@ -131,6 +150,80 @@ Y_UNIT_TEST(AddIndexCovered) {
])", NYdb::FormatResultSetYson(index));
}

Y_UNIT_TEST(AddIndexNGram) {
auto kikimr = Kikimr();
auto db = kikimr.GetQueryClient();

CreateTexts(db);
UpsertTexts(db);
AddIndexNGram(db);

const auto index = ReadIndex(db);

CompareYson(R"([
[[100u];"all"];
[[200u];"all"];
[[100u];"als"];
[[100u];"ani"];
[[100u];"ase"];
[[200u];"ase"];
[[100u];"ats"];
[[200u];"ats"];
[[300u];"ats"];
[[100u];"cat"];
[[200u];"cat"];
[[300u];"cat"];
[[100u];"cha"];
[[200u];"cha"];
[[200u];"dog"];
[[400u];"dog"];
[[400u];"fox"];
[[100u];"has"];
[[200u];"has"];
[[100u];"ima"];
[[300u];"lov"];
[[400u];"lov"];
[[100u];"mal"];
[[200u];"mal"];
[[100u];"nim"];
[[200u];"ogs"];
[[400u];"ogs"];
[[300u];"ove"];
[[400u];"ove"];
[[400u];"oxe"];
[[100u];"sma"];
[[200u];"sma"];
[[400u];"xes"]
])", NYdb::FormatResultSetYson(index));
}

Y_UNIT_TEST(AddIndexEdgeNGram) {
auto kikimr = Kikimr();
auto db = kikimr.GetQueryClient();

CreateTexts(db);
UpsertTexts(db);
AddIndexNGram(db, 3, 3, true);

const auto index = ReadIndex(db);
Cerr << NYdb::FormatResultSetYson(index) << Endl;
CompareYson(R"([
[[100u];"ani"];
[[100u];"cat"];
[[200u];"cat"];
[[300u];"cat"];
[[100u];"cha"];
[[200u];"cha"];
[[200u];"dog"];
[[400u];"dog"];
[[400u];"fox"];
[[300u];"lov"];
[[400u];"lov"];
[[100u];"sma"];
[[200u];"sma"]
])", NYdb::FormatResultSetYson(index));
}

Y_UNIT_TEST(InsertRow) {
auto kikimr = Kikimr();
auto db = kikimr.GetQueryClient();
Expand Down
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