Update more import statements

Author: Brian Carlson

docs/pages/apis/cursor.mdx

@@ -28,11 +28,9 @@ const values = [10]
 
 const cursor = client.query(new Cursor(text, values))
 
-cursor.read(100, (err, rows) => {
-  cursor.close(() => {
-    client.release()
-  })
-})
+const { rows } = await cursor.read(100)
+console.log(rows.length) // 100 (unless the table has fewer than 100 rows)
+client.release()
 ```
 
 ```ts

docs/pages/features/_meta.json

@@ -6,5 +6,6 @@
   "types": "Data Types",
   "ssl": "SSL",
   "native": "Native",
-  "esm": "ESM"
+  "esm": "ESM",
+  "callbacks": "Callbacks"
 }

docs/pages/features/callbacks.mdx

@@ -0,0 +1,39 @@
+---
+title: Callbacks
+---
+
+## Callback Support
+
+`async` / `await` is the preferred way to write async code these days with node, but callbacks are supported in the `pg` module and the `pg-pool` module. To use them, pass a callback function as the last argument to the following methods & it will be called and a promise will not be returned:
+
+
+```js
+const { Pool, Client } = require('pg')
+
+// pool
+const pool = new Pool()
+// run a query on an available client
+pool.query('SELECT NOW()', (err, res) => {
+  console.log(err, res)
+})
+
+// check out a client to do something more complex like a transaction
+pool.connect((err, client, release) => {
+  client.query('SELECT NOW()', (err, res) => {
+    release()
+    console.log(err, res)
+    pool.end()
+  })
+
+})
+
+// single client
+const client = new Client()
+client.connect((err) => {
+  if (err) throw err
+  client.query('SELECT NOW()', (err, res) => {
+    console.log(err, res)
+    client.end()
+  })
+})
+```

docs/pages/features/ssl.mdx

@@ -22,8 +22,7 @@ const config = {
   },
 }
 
-import pg from 'pg'
-const { Client, Pool } = pg
+import { Client, Pool } from 'pg'
 
 const client = new Client(config)
 await client.connect()

docs/pages/features/transactions.mdx

@@ -16,8 +16,7 @@ To execute a transaction with node-postgres you simply execute `BEGIN / COMMIT /
 ## Examples
 
 ```js
-import pg from 'pg'
-const { Pool } = pg
+import { Pool } from 'pg'
 const pool = new Pool()
 
 const client = await pool.connect()

docs/pages/guides/async-express.md

@@ -22,8 +22,7 @@ That's the same structure I used in the [project structure](/guides/project-stru
 My `db/index.js` file usually starts out like this:
 
 ```js
-import pg from 'pg'
-const { Pool } = pg
+import { Pool } from 'pg'
 
 const pool = new Pool()
 

docs/pages/guides/project-structure.md

@@ -27,13 +27,12 @@ The location doesn't really matter - I've found it usually ends up being somewha
 Typically I'll start out my `db/index.js` file like so:
 
 ```js
-import pg from 'pg'
-const { Pool } = pg
+import { Pool } from 'pg'
 
 const pool = new Pool()
 
-export const query = (text, params, callback) => {
-  return pool.query(text, params, callback)
+export const query = (text, params) => {
+  return pool.query(text, params)
 }
 ```
 
@@ -55,8 +54,7 @@ app.get('/:id', async (req, res, next) => {
 Imagine we have lots of routes scattered throughout many files under our `routes/` directory. We now want to go back and log every single query that's executed, how long it took, and the number of rows it returned. If we had required node-postgres directly in every route file we'd have to go edit every single route - that would take forever & be really error prone! But thankfully we put our data access into `db/index.js`. Let's go add some logging:
 
 ```js
-import pg from 'pg'
-const { Pool } = pg
+import { Pool } from 'pg'
 
 const pool = new Pool()
 
@@ -76,8 +74,7 @@ _note: I didn't log the query parameters. Depending on your application you migh
 Now what if we need to check out a client from the pool to run several queries in a row in a transaction? We can add another method to our `db/index.js` file when we need to do this:
 
 ```js
-import pg from 'pg'
-const { Pool } = pg
+import { Pool } from 'pg'
 
 const pool = new Pool()