$ npm install pg
Generally you will access the PostgreSQL server through a pool of clients. A client takes a non-trivial amount of time to establish a new connection. A client also consumes a non-trivial amount of resources on the PostgreSQL server - not something you want to do on every http request. Good news: node-postgres ships with built in client pooling.
var pg = require'pg';var conString = "postgres://username:password@localhost/database";//this initializes a connection pool//it will keep idle connections open for a (configurable) 30 seconds//and set a limit of 20 (also configurable)pgconnectconStringiferrreturn console.error'error fetching client from pool' err;clientquery'SELECT $1::int AS number' '1'//call `done()` to release the client back to the pooldone;iferrreturn console.error'error running query' err;console.logresultrows0number;//output: 1;;
Sometimes you may not want to use a pool of connections. You can easily connect a single client to a postgres instance, run some queries, and disconnect.
var pg = require'pg';var conString = "postgres://username:password@localhost/database";var client = conString;clientconnectiferrreturn console.error'could not connect to postgres' err;clientquery'SELECT NOW() AS "theTime"'iferrreturn console.error'error running query' err;console.logresultrows0theTime;//output: Tue Jan 15 2013 19:12:47 GMT-600 (CST)clientend;;;
To install the native bindings:
$ npm install pg pg-native
To use the native bindings, first install pg-native. Once pg-native is installed, simply replace
require('pg').native please report an issue.
COPY TO/COPY FROM
We love contributions!
If you need help getting the tests running locally or have any questions about the code when working on a patch please feel free to email me or gchat me.
I will happily accept your pull request if it:
Information about the testing processes is in the wiki.
Open source belongs to all of us, and we're all invited to participate!
If at all possible when you open an issue please provide
Usually I'll pop the code into the repo as a test. Hopefully the test fails. Then I make the test pass. Then everyone's happy!
If you need help or run into any issues getting node-postgres to work on your system please report a bug or contact me directly. I am usually available via google-talk at my github account public email address.
I usually tweet about any important status updates or changes to node-postgres on twitter.
Follow me @briancarlson to keep up to date.
node-postgres is by design pretty light on abstractions. These are some handy modules we've been using over the years to complete the picture:
pgfor promise api.
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