SCORE (Lakehouse v1)

Zwraca trafność ciągu zapytania. Im wyższy wynik, tym bardziej trafne dane. Uwaga: funkcji SCORE można używać wyłącznie razem z funkcją QUERY lub MATCH.

Funkcja SCORE w PlaidCloud Lakehouse jest wzorowana na funkcji SCORE z Elasticsearch.

Składnia SQL

SCORE()

Przykłady SQL

CREATE TABLE test(title STRING, body STRING);

CREATE INVERTED INDEX idx ON test(title, body);

INSERT INTO test VALUES
('The Importance of Reading', 'Reading is a crucial skill that opens up a world of knowledge and imagination.'),
('The Benefits of Exercise', 'Exercise is essential for maintaining a healthy lifestyle.'),
('The Power of Perseverance', 'Perseverance is the key to overcoming obstacles and achieving success.'),
('The Art of Communication', 'Effective communication is crucial in everyday life.'),
('The Impact of Technology on Society', 'Technology has revolutionized our society in countless ways.');

-- Retrieve documents where the 'title' column contains the keyword 'art' with a boost of 5 and the 'body' column contains the keyword 'reading' with a boost of 1.2, along with their relevance scores
SELECT *, score() FROM test WHERE QUERY('title:art^5 body:reading^1.2');

┌────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│           title           │                                      body                                      │  score()  │
├───────────────────────────┼────────────────────────────────────────────────────────────────────────────────┼───────────┤
│ The Importance of Reading │ Reading is a crucial skill that opens up a world of knowledge and imagination. │ 1.3860708 │
│ The Art of Communication  │ Effective communication is crucial in everyday life.                           │ 7.1992116 │
└────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘

-- Retrieve documents where the 'title' column contains the keyword 'reading' with a boost of 5 and the 'body' column contains the keyword 'everyday' with a boost of 1.2, along with their relevance scores
SELECT *, score() FROM test WHERE MATCH('title^5, body^1.2', 'reading everyday');

┌────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐
│           title           │                                      body                                      │  score()  │
├───────────────────────────┼────────────────────────────────────────────────────────────────────────────────┼───────────┤
│ The Importance of Reading │ Reading is a crucial skill that opens up a world of knowledge and imagination. │  8.585282 │
│ The Art of Communication  │ Effective communication is crucial in everyday life.                           │ 1.8575745 │
└────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘