蟑螂数据库与Node js-pg驱动程序

Question

我正在尝试使用pg驱动程序连接蟑螂数据库和节点JS。我能够成功地建立连接，但每次查询表时：只有当我在表名称前面加上数据库名称时，它才起作用，否则它会抛出关系不存在错误。尽管我在建立数据库连接时指定了数据库名称。

我用来建立数据库连接的代码：

var pg = require('pg');
var config = {
user: 'root',
host: 'localhost',
database: 'testDB',
port: 26257
};
var pool = new pg.Pool(config);   
const client = await pool.connect();

执行这一行很好，因为我在表名前面加了DBname:

const response = await client.query('select * from testDB.test');

执行此行会引发以下错误：

const response = await client.query('select * from test');

(node:12797) UnhandledPromiseRejectionWarning: error: relation "test" does not exist
at Parser.parseErrorMessage (/Users/naveenkumar/Ucars/node-cockroachDB/node_modules/pg-protocol/dist/parser.js:278:15)
at Parser.handlePacket (/Users/naveenkumar/Ucars/node-cockroachDB/node_modules/pg-protocol/dist/parser.js:126:29)
at Parser.parse (/Users/naveenkumar/Ucars/node-cockroachDB/node_modules/pg-protocol/dist/parser.js:39:38)
at Socket.<anonymous> (/Users/naveenkumar/Ucars/node-cockroachDB/node_modules/pg-protocol/dist/index.js:10:42)
at Socket.emit (events.js:314:20)
at addChunk (_stream_readable.js:304:12)
at readableAddChunk (_stream_readable.js:280:9)
at Socket.Readable.push (_stream_readable.js:219:10)
at TCP.onStreamRead (internal/stream_base_commons.js:188:23)
at TCP.callbackTrampoline (internal/async_hooks.js:123:14)
(Use `node --trace-warnings ...` to show where the warning was created)
<node_internals>/internal/process/warning.js:33
(node:12797) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
<node_internals>/internal/process/warning.js:33
(node:12797) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

感谢任何形式的帮助，提前感谢：(

Answer 1

EDIT：数据库名称应全部小写。看见https://www.cockroachlabs.com/docs/stable/keywords-and-identifiers.html#rules-对于标识符

defaultdb> CREATE DATABASE TeSt;
CREATE DATABASE
Time: 166.382ms
defaultdb> SHOW DATABASES;
database_name        |       owner
-----------------------------+---------------------
defaultdb                  | root
test                       | lauren
testdb                     | lauren

---

对于CockroachDB v20.2.2和pg v8.5.1，我无法重现该问题。以下工作符合预期：

const { Pool } = require("pg");
const config = {
...
database: "testdb",
...
};
const pool = new Pool(config);
;(async function() {
const client = await pool.connect();
await client.query("select * from test_table", (err, res) => {
console.log(err, res);
client.end();
});
})()