pg-batch-query 

Batches queries by using the Extended query protocol.
Essentially we do the following
- send a single PARSE command to create a named statement.
- send a pair of BIND and EXECUTE commands
- Finally send a SYNC to close the current transaction.

As per benchmark tests, number of queries per seconds gets tripled using batched queries.

installation

``bash
$ yarn add pg
$ yarn add pg-batch-query
`

Usage

$3

`javascript
const pg = require('pg')
const BatchQuery = require('pg-batch-query')

const pool = new pg.Pool()

async function query() {
const client = await pool.connect()
try {
const batch = new BatchQuery({
name: 'optional',
text: 'SELECT * from foo where bar = $1',
values: [
['first'],
['second']
]
})

const result = await client.query(batch).execute()
for (const res of result) {
for (const row of res.rows) {
console.log(row)
}
}
} finally {
client.release()
}
}

query().catch(console.error)
`


$3

`typescript
import pg from 'pg'
import BatchQuery from 'pg-batch-query'

const pool = new pg.Pool()

// Define row type
interface User {
id: number
name: string
created_at: Date
}

async function query() {
const client = await pool.connect()
try {
const batch = new BatchQuery({
name: 'fetch_users',
text: 'SELECT * from users where name = $1 and created_at = $2',
values: [
['first', new Date()],
['second', new Date()]
]
})

const results = await client.query(batch).execute()

for ( const result of results ) {
for ( const row of result.rows ) {
console.log(User: ${row.name}, row)
}
}
} finally {
client.release()
}
}

query().catch(console.error)
`

$3

Batch Query accepts any javascript type that PostgreSQL supports, just like a regular pg query

Important: BatchQuery instances are stateful and designed for single use. You must create a new instance for every execution. Calling .execute() more than once on the same instance will throw an error.

Testing

To run the tests, you will need to create a .env file in the root of the project and add the following environment variables:

`
PGUSER=your_postgres_user
PGHOST=your_postgres_host
PGDATABASE=your_postgres_database
PGPASSWORD=your_postgres_password
PGPORT=your_postgres_port
`

Then, you can run the tests using the following command:

`bash
yarn test
``

contribution

I'm very open to contribution! Open a pull request with your code or idea and we'll talk about it. If it's not way insane we'll merge it in too: isn't open source awesome?

license

MIT

Copyright (c) 2023 Ankush Chadda

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

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