Log specific postgresql query using pg-promise

问题

I am using pg-promise package with Nodejs to execute PostgreSQL queries. I want to see the queries executed. Only specific queries, say, just one query that I want to debug.

I can see that one recommended way is to use the pg-monitor to catch the events and log them as mentioned here in the examples documentation.

Without using pg-monitor, is there a simple way to just print the prepared query that is executed. I can't see it in the docs.

Example:

db.query("SELECT * FROM table WHERE id = $/id/", {id: 2})

How to print this query to yield?

SELECT * FROM table WHERE id = 2

回答1:

is there a simple way to just print the prepared query that is executed...

A query in general - yes, see below. A Prepared Query - no, those are by definition formatted on the server-side.

const query = pgp.as.format('SELECT * FROM table WHERE id = $/id/', {id: 2});
console.log(query);
db.any(query).then(...).catch(...)

And if you want to print all queries executed by your module, without using pg-monitor, simply add event query handler when initializing the library:

const initOptions = {
  query(e) {
    console.log(e.query);
  }
};
const pgp = require('pg-promise')(initOptions);

来源：https://stackoverflow.com/questions/43780737/log-specific-postgresql-query-using-pg-promise