PostgreSQL全文搜索联合列搜索

问题描述

我有两个桌子。

CREATE TABLE document (
doc_id varchar PRIMARY KEY,title varchar,content varchar
);

CREATE TABLE doc_spec_sets (
tc_set_id varchar PRIMARY KEY,doc_id varchar,spec varchar
);

数据：

insert into document values('doc1','quickly for the visualiser that','with the structure I mentioned');
insert into document values('doc2','The main arguments','if your data was static');
insert into document values('doc3','We’ve had issues','columns so we need');
insert into document values('doc4','assessed our options','Replace both occurences');
insert into document values('doc5','So even though','full text of documents');
insert into document values('doc6','records and we found','documents,it added');
insert into document values('doc7','the speed deteriorates','rather than a slower query');
insert into document values('doc8','but we found','network overhead rather');
insert into document values('doc9','Then you need to fill options','then it only added');

insert into doc_spec_sets values('tc1','doc1','documents');
insert into doc_spec_sets values('tc2','doc2','occurences');
insert into doc_spec_sets values('tc3','doc3','rather');
insert into doc_spec_sets values('tc4','doc4','options');
insert into doc_spec_sets values('tc5','doc5','documents');
insert into doc_spec_sets values('tc6','doc6','mentioned');
insert into doc_spec_sets values('tc7','options');
insert into doc_spec_sets values('tc8','structure');
insert into doc_spec_sets values('tc9','network');

对于全文搜索，我使用以下功能，索引并选择请求：

-- create function
CREATE OR REPLACE FUNCTION make_tsvector(title varchar,content varchar)
   RETURNS tsvector AS $$
BEGIN
  RETURN (setweight(to_tsvector('english',title),'A') ||
    setweight(to_tsvector('english',content),'B'));
END
$$ LANGUAGE 'plpgsql' IMMUTABLE;

-- create index
CREATE INDEX IF NOT EXISTS idx_fts_articles ON document
  USING gin(make_tsvector(title,content));


-- select requests #1
SELECT 
  doc_id,title,content
FROM document 
WHERE
  make_tsvector(title,content) @@ to_tsquery('documents & added');

对于列搜索，我使用选择查询＃2：

select
    document.doc_id,document.title,document.content,doc_spec_sets.spec
from doc_spec_sets
  LEFT OUTER join document on doc_spec_sets.doc_id = document.doc_id
where 
  doc_spec_sets.spec = 'documents'
  or 
  doc_spec_sets.spec = 'added'
group by document.doc_id,doc_spec_sets.spec;

问题： 如何发出包含第一个和第二个选择请求的请求？ 我想优先处理第二个请求。 工作示例：https://rextester.com/LJDKH88583

解决方法

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