Postgresql 如何使用TSVECTOR和TSQUERY搜索单个或多个列
我使用了一些样板代码(如下所示),它创建了一个规范化的tsvectorPostgresql 如何使用TSVECTOR和TSQUERY搜索单个或多个列,postgresql,sequelize.js,tsvector,Postgresql,Sequelize.js,Tsvector,我使用了一些样板代码(如下所示),它创建了一个规范化的tsvector\u search列,该列是我指定的(在searchObjects中)我希望全文搜索的所有列 在大多数情况下,这是好的。我将其与Sequelize结合使用,因此我的查询如下所示: const articles = await Article.findAndCountAll({ where: { [Sequelize.Op.and]: Sequelize.fn( 'article._search @@ p
\u search
列,该列是我指定的(在searchObjects
中)我希望全文搜索的所有列
在大多数情况下,这是好的。我将其与Sequelize结合使用,因此我的查询如下所示:
const articles = await Article.findAndCountAll({
where: {
[Sequelize.Op.and]: Sequelize.fn(
'article._search @@ plainto_tsquery',
'english',
Sequelize.literal(':query')
),
[Sequelize.Op.and]: { status: STATUS_TYPE_ACTIVE }
},
replacements: { query: q }
});
搜索索引设置:
const vectorName = '_search';
const searchObjects = {
articles: ['headline', 'cleaned_body', 'summary'],
brands: ['name', 'cleaned_about'],
products: ['name', 'cleaned_description']
};
module.exports = {
up: async queryInterface =>
await queryInterface.sequelize.transaction(t =>
Promise.all(
Object.keys(searchObjects).map(table =>
queryInterface.sequelize
.query(
`
ALTER TABLE ${table} ADD COLUMN ${vectorName} TSVECTOR;
`,
{ transaction: t }
)
.then(() =>
queryInterface.sequelize.query(
`
UPDATE ${table} SET ${vectorName} = to_tsvector('english', ${searchObjects[
table
].join(" || ' ' || ")});
`,
{ transaction: t }
)
)
.then(() =>
queryInterface.sequelize.query(
`
CREATE INDEX ${table}_search ON ${table} USING gin(${vectorName});
`,
{ transaction: t }
)
)
.then(() =>
queryInterface.sequelize.query(
`
CREATE TRIGGER ${table}_vector_update
BEFORE INSERT OR UPDATE ON ${table}
FOR EACH ROW EXECUTE PROCEDURE tsvector_update_trigger(${vectorName}, 'pg_catalog.english', ${searchObjects[
table
].join(', ')});
`,
{ transaction: t }
)
)
.error(console.log)
)
)
),
down: async queryInterface =>
await queryInterface.sequelize.transaction(t =>
Promise.all(
Object.keys(searchObjects).map(table =>
queryInterface.sequelize
.query(
`
DROP TRIGGER ${table}_vector_update ON ${table};
`,
{ transaction: t }
)
.then(() =>
queryInterface.sequelize.query(
`
DROP INDEX ${table}_search;
`,
{ transaction: t }
)
)
.then(() =>
queryInterface.sequelize.query(
`
ALTER TABLE ${table} DROP COLUMN ${vectorName};
`,
{ transaction: t }
)
)
)
)
)
};
问题在于,由于代码包含每个searchObjects
数组中的两列,因此存储的是每个数组中所有列的组合索引
例如,在文章
表中:'headline'、'cleaned\u body'、'summary'
都是单个生成的\u搜索
向量的一部分
因此,我无法仅通过标题
或仅通过正文
等进行搜索。我希望能够单独搜索每一列,也可以一起搜索
用例在我的搜索类型中,我只想在标题上搜索。但是在我的搜索结果页面上,我想搜索searchObjects
中指定的所有列
有人能给我一个提示我需要改变什么吗?我应该为每列创建一个新的tsvector吗?如果有人好奇,下面是如何为每列创建一个tsvector:
try {
for (const table in searchObjects) {
for (const col of searchObjects[table]) {
await queryInterface.sequelize.query(
`ALTER TABLE ${table} ADD COLUMN ${col + vectorName} TSVECTOR;`,
{ transaction }
);
await queryInterface.sequelize.query(
`UPDATE ${table} SET ${col + vectorName} = to_tsvector('english', ${col});`,
{ transaction }
);
await queryInterface.sequelize.query(
`CREATE INDEX ${table}_${col}_search ON ${table} USING gin(${col +
vectorName});`,
{ transaction }
);
await queryInterface.sequelize.query(
`CREATE TRIGGER ${table}_${col}_vector_update
BEFORE INSERT OR UPDATE ON ${table}
FOR EACH ROW EXECUTE PROCEDURE tsvector_update_trigger(${col +
vectorName}, 'pg_catalog.english', ${col});`,
{ transaction }
);
}
}
await transaction.commit();
} catch (err) {
await transaction.rollback();
throw err;
}
听起来您需要更改typeahead的查询,并设计两个索引,每个搜索一个。@LaurenzAlbe谢谢。Sequelize 6.5.0+支持TSVECTOR数据类型,请参见