README

phpClickHouse-laravel

Laravel and Lumen adapter for popular ClickHouse libraries:

• https://github.com/smi2/phpClickHouse - connections and query execution
• https://github.com/the-tinderbox/ClickhouseBuilder - query builder

Features

Requires only the PHP cURL extension. PHP 8.0 or higher is supported.

See phpClickHouse features for more details: https://github.com/smi2/phpClickHouse#features

Prerequisites

• PHP 8.0
• Laravel/Lumen 7+
• ClickHouse server

Installation

Install via Composer:

$ composer require glushkovds/phpclickhouse-laravel

Laravel will discover the package service provider automatically.

The package registers a clickhouse database connection with sensible defaults. Set only the environment values you need to override:

CLICKHOUSE_HOST=localhost
CLICKHOUSE_PORT=8123
CLICKHOUSE_DATABASE=default
CLICKHOUSE_USERNAME=default
CLICKHOUSE_PASSWORD=
CLICKHOUSE_TIMEOUT_CONNECT=2
CLICKHOUSE_TIMEOUT_QUERY=2
CLICKHOUSE_HTTPS=false
CLICKHOUSE_RETRIES=0
CLICKHOUSE_MAX_PARTITIONS_PER_INSERT_BLOCK=300
CLICKHOUSE_FIX_DEFAULT_QUERY_BUILDER=true

If your application uses cached configuration, rebuild the cache after changing ClickHouse environment values.

The package registers this connection as database.connections.clickhouse automatically when the application does not already define it in config/database.php.
If you need to override the defaults or add advanced options, define the connection in config/database.php:

'connections' => [
    'clickhouse' => [
        'driver' => 'clickhouse',
        'host' => env('CLICKHOUSE_HOST'),
        'port' => (int) env('CLICKHOUSE_PORT', 8123),
        'database' => env('CLICKHOUSE_DATABASE', 'default'),
        'username' => env('CLICKHOUSE_USERNAME', 'default'),
        'password' => env('CLICKHOUSE_PASSWORD', ''),
        'timeout_connect' => env('CLICKHOUSE_TIMEOUT_CONNECT', 2),
        'timeout_query' => env('CLICKHOUSE_TIMEOUT_QUERY', 2),
        'https' => (bool) env('CLICKHOUSE_HTTPS', false),
        'retries' => env('CLICKHOUSE_RETRIES', 0),
        'settings' => [
            'max_partitions_per_insert_block' => 300,
        ],
        'fix_default_query_builder' => true,
    ],
],

If you use Lumen or have disabled Laravel package discovery, register the service provider manually:

$app->register(\PhpClickHouseLaravel\ClickhouseServiceProvider::class);

Usage

You can use smi2/phpClickHouse functionality directly:

/** @var \ClickHouseDB\Client $db */
$db = DB::connection('clickhouse')->getClient();
$statement = $db->select('SELECT * FROM summing_url_views LIMIT 2');

See the phpClickHouse documentation for more details: https://github.com/smi2/phpClickHouse/blob/master/README.md

Lightweight Eloquent-like model layer

1. Add a model

<?php

namespace App\Models\Clickhouse;

use PhpClickHouseLaravel\BaseModel;

class MyTable extends BaseModel
{
    // Optional. By default, MyTable resolves to my_table.
    protected $table = 'my_table';

}

2. Add a migration

<?php

class CreateMyTable extends \PhpClickHouseLaravel\Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        static::write('
            CREATE TABLE my_table (
                id UInt32,
                created_at DateTime,
                field_one String,
                field_two Int32
            )
            ENGINE = MergeTree()
            ORDER BY (id)
        ');
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        static::write('DROP TABLE my_table');
    }
}

You can also use the Schema Builder:

<?php

class CreateMyTable extends \PhpClickHouseLaravel\Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        static::createMergeTree('my_table', fn(MergeTree $table) => $table
            ->columns([
                $table->uInt32('id'),
                $table->datetime('created_at', 3)->default(new Expression('now64()')),
                $table->string('field_one'),
                $table->int32('field_two'),
            ])
            ->orderBy('id')
        );
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        static::write('DROP TABLE my_table');
    }
}

3. Insert data

Single row

$model = MyTable::create(['model_name' => 'model 1', 'some_param' => 1]);
// or
$model = MyTable::make(['model_name' => 'model 1']);
$model->some_param = 1;
$model->save();
// or
$model = new MyTable();
$model->fill(['model_name' => 'model 1', 'some_param' => 1])->save();

Bulk insert

// Non-associative way
MyTable::insertBulk([['model 1', 1], ['model 2', 2]], ['model_name', 'some_param']);
// Associative way
MyTable::insertAssoc([['model_name' => 'model 1', 'some_param' => 1], ['some_param' => 2, 'model_name' => 'model 2']]);

4. Query data

$rows = MyTable::select(['field_one', new RawColumn('sum(field_two)', 'field_two_sum')])
    ->where('created_at', '>', '2020-09-14 12:47:29')
    ->groupBy('field_one')
    ->settings(['max_threads' => 3])
    ->getRows();

Known issues

Known issues are described in docs/known_issues.md.

Advanced usage

Column casting

Before insertion, columns are converted to the data types defined in $casts.
This feature does not apply to data selection.
Supported cast types: boolean.

namespace App\Models\Clickhouse;

use PhpClickHouseLaravel\BaseModel;

class MyTable extends BaseModel
{
    /**
     * The columns that should be cast.
     *
     * @var array
     */
    protected $casts = ['some_bool_column' => 'boolean'];
}
// Then you can insert the data like this:
MyTable::insertAssoc([
    ['some_param' => 1, 'some_bool_column' => false],
]);

Events

Events work like Eloquent model events.
Available events: creating, created, saved.

Retries

You may enable request retries for non-200 responses, for example when temporary network issues occur.

Add the value to your .env file:

CLICKHOUSE_RETRIES=2

CLICKHOUSE_RETRIES is optional. The default value is 0.
0 means one attempt.
1 means one attempt plus one retry on error, for a total of two attempts.

Working with huge rows

You can chunk results like in Laravel:

// Split the result into chunks of 30 rows.
$rows = MyTable::select(['field_one', 'field_two'])
    ->chunk(30, function ($rows) {
        foreach ($rows as $row) {
            echo $row['field_two'] . "\n";
        }
    });

Buffer engine for insert queries

See https://clickhouse.tech/docs/en/engines/table-engines/special/buffer/

<?php

namespace App\Models\Clickhouse;

use PhpClickHouseLaravel\BaseModel;

class MyTable extends BaseModel
{
    // Optional. By default, MyTable resolves to my_table.
    protected $table = 'my_table';

    // Inserts use $tableForInserts, selects use $table.
    protected $tableForInserts = 'my_table_buffer';
}

If you also want to read from the buffer table, set $table to the buffer table name:

<?php

namespace App\Models\Clickhouse;

use PhpClickHouseLaravel\BaseModel;

class MyTable extends BaseModel
{
    protected $table = 'my_table_buffer';
}

OPTIMIZE Statement

See https://clickhouse.com/docs/ru/sql-reference/statements/optimize/

MyTable::optimize($final = false, $partition = null);

TRUNCATE Statement

Removes all data from a table.

MyTable::truncate();

Deletions

See https://clickhouse.com/docs/en/sql-reference/statements/alter/delete/

MyTable::where('field_one', 123)->delete();

When using the Buffer engine, OPTIMIZE and ALTER TABLE DELETE can target the source table:

<?php

namespace App\Models\Clickhouse;

use PhpClickHouseLaravel\BaseModel;

class MyTable extends BaseModel
{
    // SELECT and INSERT queries use $table.
    protected $table = 'my_table_buffer';

    // OPTIMIZE and DELETE queries use $tableSources.
    protected $tableSources = 'my_table';
}

Updates

See https://clickhouse.com/docs/ru/sql-reference/statements/alter/update/

MyTable::where('field_one', 123)->update(['field_two' => 'new_val']);
// or expression
MyTable::where('field_one', 123)
    ->update(['field_two' => new RawColumn("concat(field_two,'new_val')")]);

Helpers for inserting different data types

// Array data type
MyTable::insertAssoc([[1, 'str', new InsertArray(['a','b'])]]);

Working with multiple ClickHouse instances in a project

1. Add a second connection to config/database.php:

'clickhouse2' => [
    'driver' => 'clickhouse',
    'host' => 'clickhouse2',
    'port' => 8123,
    'database' => 'default',
    'username' => 'default',
    'password' => '',
    'timeout_connect' => 2,
    'timeout_query' => 2,
    'https' => false,
    'retries' => 0,
    'fix_default_query_builder' => true,
],

2. Add a model

<?php

namespace App\Models\Clickhouse;

use PhpClickHouseLaravel\BaseModel;

class MyTable2 extends BaseModel
{
    protected $connection = 'clickhouse2';
    
    protected $table = 'my_table2';
}

3. Add a migration

<?php

return new class extends \PhpClickHouseLaravel\Migration
{
    protected $connection = 'clickhouse2';
    
    public function up()
    {
        static::write('CREATE TABLE my_table2 ...');
    }
    
    public function down()
    {
        static::write('DROP TABLE my_table2');
    }
};

Cluster mode

Important!

• Each ClickHouse node must use the same database name, username, and password.
• Reads and writes use the first available node.
• Migrations run on all nodes. If one node is unavailable, the migration will throw an exception.

Your config/database.php should look like this:

'clickhouse' => [
    'driver' => 'clickhouse',
    'cluster' => [
        [
            'host' => 'clickhouse01',
            'port' => 8123,
        ],
        [
            'host' => 'clickhouse02',
            'port' => 8123,
        ],
    ],
    'database' => env('CLICKHOUSE_DATABASE','default'),
    'username' => env('CLICKHOUSE_USERNAME','default'),
    'password' => env('CLICKHOUSE_PASSWORD',''),
    'timeout_connect' => env('CLICKHOUSE_TIMEOUT_CONNECT',2),
    'timeout_query' => env('CLICKHOUSE_TIMEOUT_QUERY',2),
    'https' => (bool)env('CLICKHOUSE_HTTPS', null),
    'retries' => env('CLICKHOUSE_RETRIES', 0),
    'settings' => [ // optional
        'max_partitions_per_insert_block' => 300,
    ],
    'fix_default_query_builder' => true,
],

Migration example:

<?php

return new class extends \PhpClickHouseLaravel\Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        static::write('
            CREATE TABLE my_table (
                id UInt32,
                created_at DateTime,
                field_one String,
                field_two Int32
            )
            ENGINE = ReplicatedMergeTree('/clickhouse/tables/default.my_table', '{replica}')
            ORDER BY (id)
        ');
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        static::write('DROP TABLE my_table');
    }
};

You can get the current node host and switch the active connection to the next node:

$row = new MyTable();
echo $row->getThisClient()->getConnectHost();
// will print 'clickhouse01'
$row->resolveConnection()->getCluster()->slideNode();
echo $row->getThisClient()->getConnectHost();
// will print 'clickhouse02'