14 lines
643 B
MySQL
14 lines
643 B
MySQL
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DROP FUNCTION IF EXISTS discard_scores();
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CREATE FUNCTION discard_scores () RETURNS VOID AS $$
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BEGIN
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WITH scores_to_delete AS (
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SELECT alocidispid, blocidispid, scorer, created_at FROM (SELECT *, row_number() OVER (PARTITION BY alocidispid, blocidispid, scorer ORDER BY scores.created_at DESC) AS rownum FROM scores) tmp WHERE rownum > 6
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)
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DELETE FROM scores USING scores_to_delete WHERE
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scores.alocidispid = scores_to_delete.alocidispid AND
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scores.blocidispid = scores_to_delete.blocidispid AND
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scores.scorer = scores_to_delete.scorer AND
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scores.created_at = scores_to_delete.created_at;
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RETURN;
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END;
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$$ LANGUAGE plpgsql;
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