我正在尝试开发排名全文的搜索。我们的想法是从两个不同的表中查询两个不同的列并返回＆＃34;匹配分数＆＃34;两者。
我希望将结果聚集在一起。我的意思是，score_question会显示结果ORDER BY DESC，与answer_question相同。我希望结果只显示answer_score或question_score是否> = 0.1的行。
我该怎么做？
CREATE OR REPLACE FUNCTION search_questions(psearch text)
RETURNS TABLE (answerid INTEGER, questionid INTEGER, score_question REAL, score_answer REAL) AS $func$
BEGIN
return QUERY
SELECT DISTINCT publications.publicationid as answers ,questions.publicationid as questions, ts_rank_cd(
to_tsvector('english', questions.title),
plainto_tsquery('english', psearch)
) AS score_question, ts_rank_cd(to_tsvector('english', publications.body),
plainto_tsquery('english', psearch)) AS score_answer
FROM questions, publications INNER JOIN answers ON publications.publicationid = answers.publicationid
WHERE to_tsvector('english', questions.title || '' || publications.body) @@ plainto_tsquery('english', psearch)
GROUP BY publications.publicationid, questions.publicationid;
END
$func$ LANGUAGE plpgsql;
以下是我的结果
answerid | questionid | score_question | score_answer
----------+------------+----------------+--------------
70 | 23 | 0.2 | 0
116 | 23 | 0.2 | 0
143 | 150 | 0.1 | 0
124 | 150 | 0.1 | 0
130 | 23 | 0.2 | 0
60 | 32 | 0 | 0.1
60 | 27 | 0 | 0.1
60 | 129 | 0 | 0.1
60 | 23 | 0.2 | 0.1
60 | 122 | 0 | 0.1
60 | 31 | 0 | 0.1
144 | 150 | 0.1 | 0
53 | 23 | 0.2 | 0
143 | 23 | 0.2 | 0
116 | 150 | 0.1 | 0
54 | 23 | 0.2 | 0
65 | 23 | 0.2 | 0
53 | 150 | 0.1 | 0
144 | 23 | 0.2 | 0
65 | 150 | 0.1 | 0
60 | 21 | 0 | 0.1
54 | 150 | 0.1 | 0
60 | 10 | 0 | 0.1
60 | 150 | 0.1 | 0.1
60 | 141 | 0 | 0.1
124 | 23 | 0.2 | 0
60 | 19 | 0 | 0.1
130 | 150 | 0.1 | 0
60 | 135 | 0 | 0.1
70 | 150 | 0.1 | 0
(30 rows)