如何使用 node-postgres 设置架构

Question

我正在尝试DOCUMENT使用node-postgres查询在我的 postgres 数据库中调用的模式。

我似乎无法针对指定的架构运行查询。

此查询使用 psql 直接针对 postgres 运行良好

SELECT * FROM "DOCUMENT".document_metadata m 
LEFT OUTER JOIN "DOCUMENT".document_attributes a 
ON a.document_id = m.id

此代码产生以下错误

SELECT * FROM "DOCUMENT".document_metadata m 
LEFT OUTER JOIN "DOCUMENT".document_attributes a 
ON a.document_id = m.id

错误

error: relation "DOCUMENT.document_metadata" does not exist
    at Connection.parseE (/usr/src/app/node_modules/pg/lib/connection.js:602:11)
    at Connection.parseMessage (/usr/src/app/node_modules/pg/lib/connection.js:399:19)
    at Socket.<anonymous> (/usr/src/app/node_modules/pg/lib/connection.js:121:22)
    at Socket.emit (events.js:189:13)
    at addChunk (_stream_readable.js:284:12)
    at readableAddChunk (_stream_readable.js:265:11)
    at Socket.Readable.push (_stream_readable.js:220:10)
    at TCP.onStreamRead [as onread] (internal/stream_base_commons.js:94:17)

我也试过这个

const query = `SELECT * FROM "DOCUMENT".document_metadata m 
               LEFT OUTER JOIN "DOCUMENT".document_attributes a 
               ON a.document_id = m.id`
const metadata = await db.query(query)

产生错误

error: relation "document_metadata" does not exist
    at Connection.parseE (/usr/src/app/node_modules/pg/lib/connection.js:602:11)
    at Connection.parseMessage (/usr/src/app/node_modules/pg/lib/connection.js:399:19)
    at Socket.<anonymous> (/usr/src/app/node_modules/pg/lib/connection.js:121:22)
    at Socket.emit (events.js:189:13)
    at addChunk (_stream_readable.js:284:12)
    at readableAddChunk (_stream_readable.js:265:11)
    at Socket.Readable.push (_stream_readable.js:220:10)
    at TCP.onStreamRead [as onread] (internal/stream_base_commons.js:94:17)

更新 当我直接在 psql 中运行这些相同的查询时，我看到 10 行带有表名。当我通过我的节点代码运行它时，我看不到任何行：

error: relation "DOCUMENT.document_metadata" does not exist
    at Connection.parseE (/usr/src/app/node_modules/pg/lib/connection.js:602:11)
    at Connection.parseMessage (/usr/src/app/node_modules/pg/lib/connection.js:399:19)
    at Socket.<anonymous> (/usr/src/app/node_modules/pg/lib/connection.js:121:22)
    at Socket.emit (events.js:189:13)
    at addChunk (_stream_readable.js:284:12)
    at readableAddChunk (_stream_readable.js:265:11)
    at Socket.Readable.push (_stream_readable.js:220:10)
    at TCP.onStreamRead [as onread] (internal/stream_base_commons.js:94:17)

Answer 1

只需在单独的行中执行：

db.query("SET search_path TO 'DOCUMENT';")

DOCUMENT 是您的架构的名称，然后执行正常查询：

const query = `SELECT * FROM document_metadata m 
               LEFT OUTER JOIN document_attributes a 
               ON a.document_id = m.id;`

db.query(query)