postgres/README.md

<p align="center">
<a href="https://amphp.org/postgres"><img src="https://raw.githubusercontent.com/amphp/logo/master/repos/postgres.png?v=12-07-2017" alt="postgres"/></a>
</p>

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<p align="center"><strong>Async PostgreSQL client built with <a href="https://amphp.org/">Amp</a>.</strong></p>

## Installation

This package can be installed as a [Composer](https://getcomposer.org/) dependency.

```bash
composer require amphp/postgres
```

## Requirements

- PHP 7.0+
- [ext-pgsql](https://secure.php.net/pgsql) or [pecl-pq](https://pecl.php.net/package/pq)

Note: [pecl-ev](https://pecl.php.net/package/ev) is not compatible with ext-pgsql. If you wish to use pecl-ev for the event loop backend, you must use pecl-pq.

## Documentation & Examples

Prepared statements and parameterized queries support named placeholders, as well as `?` and standard numeric (i.e. `$1`) placeholders.

More examples can be found in the [`examples`](examples) directory.

```php
Amp\Loop::run(function () {
    /** @var \Amp\Postgres\Pool $pool */
    $pool = Amp\Postgres\pool("host=localhost user=postgres dbname=test");

    /** @var \Amp\Postgres\Statement $statement */
    $statement = yield $pool->prepare("SELECT * FROM test WHERE id = :id");

    /** @var \Amp\Postgres\ResultSet $result */
    $result = yield $statement->execute(['id' => 1337]);
    while (yield $result->advance()) {
        $row = $result->getCurrent();
        // $row is an array (map) of column values. e.g.: $row['column_name']
    }
});
```

## Versioning

`amphp/postgres` follows the [semver](http://semver.org/) semantic versioning specification like all other `amphp` packages.

## Security

If you discover any security related issues, please email [`contact@amphp.org`](mailto:contact@amphp.org) instead of using the issue tracker.

## License

The MIT License (MIT). Please see [`LICENSE`](./LICENSE) for more information.