Added options to ignore order by in deletes and updates (#89)

* Added an option to ignore order by in deletes

* Enable test only when integration tests are executed

* Fix code styling

* Apply suggestions from code review

Co-authored-by: adityamish <89900889+adityamish@users.noreply.github.com>

* Added clarification according to the review

---------

Co-authored-by: AdalbertMemSQL <AdalbertMemSQL@users.noreply.github.com>
Co-authored-by: adityamish <89900889+adityamish@users.noreply.github.com>

Author: AdalbertMemSQL

README.md

@@ -15,6 +15,7 @@ This repository contains the official SingleStoreDB Driver for Laravel. This dri
 - [Usage](#usage)
 - [Issues connecting to SingleStore Managed Service](#issues-connecting-to-singlestore-managed-service)
 - [Persistent Connections (performance optimization)](#persistent-connections-performance-optimization)
+- [Order by in delete and update](#order-by-in-delete-and-update)
 - [PHP Versions before 8.1](#php-versions-before-81)
 - [Migrations](#migrations)
   - [Universal Storage Tables (Columnstore)](#universal-storage-tables-columnstore)
@@ -123,6 +124,42 @@ To enable this feature, simply update your options to include `PDO::ATTR_PERSIST
 ]) : [],
 ```
 
+## `ORDER BY` Clause in `DELETE` and `UPDATE` Queries
+
+SingleStore does not support the `ORDER BY` clause in the `DELETE` and `UPDATE` queries.
+Issuing queries similar to the following will return an error. 
+
+```php
+DB::table('test')->orderBy('id', 'asc')->update(['id' => 1, 'a' => 'b']);
+DB::table('test')->orderBy('id', 'asc')->delete();
+```
+
+You can configure the driver to ignore `orderBy` in `delete()` and `update()` requests by enabling `ignore_order_by_in_deletes` and
+`ignore_order_by_in_updates` in the connection configuration, respectively. For example:
+
+```php
+[
+    'default' => env('DB_CONNECTION', 'singlestore'),
+
+    'connections' => [
+        'singlestore' => [
+            'driver' => 'singlestore',
+            'ignore_order_by_in_deletes' => true,
+            'ignore_order_by_in_updates' => true,
+            ...
+        ],
+    ]
+]
+```
+
+Note that when `orderBy` is ignored, it may result in deletion/update of different rows if query contains LIMIT or OFFSET. 
+
+Example:
+```php
+DB::table('user')->orderBy('score', 'asc')->limit(5)->delete();
+```
+In the following query when ORDER BY is ignored - 5 random users will be deleted instead of 5 users with the lowest score.
+
 ## PHP Versions before 8.1
 
 In PHP versions before 8.1, the flag `PDO::ATTR_EMULATE_PREPARES` results in a bug by which all attributes returned by MySQL (and

src/Connect/Connection.php

@@ -32,7 +32,7 @@ public function getSchemaBuilder()
      */
     protected function getDefaultQueryGrammar()
     {
-        $grammar = new Query\Grammar;
+        $grammar = new Query\Grammar($this->getConfig('ignore_order_by_in_deletes'), $this->getConfig('ignore_order_by_in_updates'));
         if (method_exists($grammar, 'setConnection')) {
             $grammar->setConnection($this);
         }

src/Query/Grammar.php

@@ -2,11 +2,23 @@
 
 namespace SingleStore\Laravel\Query;
 
+use Exception;
 use Illuminate\Database\Query\Builder;
 use Illuminate\Database\Query\Grammars\MySqlGrammar;
+use Illuminate\Support\Facades\Log;
 
 class Grammar extends MySqlGrammar
 {
+    private $ignoreOrderByInDeletes;
+
+    private $ignoreOrderByInUpdates;
+
+    public function __construct($ignoreOrderByInDeletes, $ignoreOrderByInUpdates)
+    {
+        $this->ignoreOrderByInDeletes = $ignoreOrderByInDeletes;
+        $this->ignoreOrderByInUpdates = $ignoreOrderByInUpdates;
+    }
+
     public function compileOptions(array $options): string
     {
         $optionString = '';
@@ -20,6 +32,40 @@ public function compileOptions(array $options): string
         return "OPTION ({$optionString})";
     }
 
+    public function compileDelete(Builder $query)
+    {
+        // TODO: allow order by in the case when table has unique column
+        if (isset($query->orders)) {
+            if ($this->ignoreOrderByInDeletes) {
+                if (env('APP_ENV') !== 'production') {
+                    Log::warning('SingleStore does not support the "ORDER BY" clause in a "DELETE" statement. The "ORDER BY" clause will be ignored.');
+                }
+                $query->orders = [];
+            } else {
+                throw new Exception('SingleStore does not support the "ORDER BY" clause in a "DELETE" statement. Enable the "ignore_order_by_in_deletes" configuration to ignore "orderBy" in "delete" operations.');
+            }
+        }
+
+        return parent::compileDelete($query);
+    }
+
+    public function compileUpdate(Builder $query, array $values)
+    {
+        // TODO: allow order by in the case when table has unique column
+        if (isset($query->orders)) {
+            if ($this->ignoreOrderByInUpdates) {
+                if (env('APP_ENV') !== 'production') {
+                    Log::warning('SingleStore does not support the "ORDER BY" clause in an "UPDATE" statement. The "ORDER BY" clause will be ignored.');
+                }
+                $query->orders = [];
+            } else {
+                throw new Exception('SingleStore does not support the "ORDER BY" clause in an update statement. Enable the "ignore_order_by_in_updates" configuration to ignore "orderBy" in "update" operations.');
+            }
+        }
+
+        return parent::compileUpdate($query, $values);
+    }
+
     /**
      * Compile a "where fulltext" clause.
      *

tests/BaseTest.php

@@ -35,6 +35,8 @@ public function getEnvironmentSetUp($app)
         $app['config']->set('database.default', 'mysql');
         $app['config']->set('database.connections.mysql.driver', 'singlestore');
         $app['config']->set('database.connections.mysql.options.'.PDO::ATTR_EMULATE_PREPARES, true);
+        $app['config']->set('database.connections.mysql.ignore_order_by_in_deletes', true);
+        $app['config']->set('database.connections.mysql.ignore_order_by_in_updates', true);
     }
 
     public function singlestoreVersion()

tests/Hybrid/OrderByTest.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace SingleStore\Laravel\Tests\Hybrid;
+
+use Illuminate\Support\Facades\DB;
+use SingleStore\Laravel\Schema\Blueprint;
+use SingleStore\Laravel\Tests\BaseTest;
+
+class orderByTest extends BaseTest
+{
+    use HybridTestHelpers;
+
+    /** @test */
+    public function ignoresOrderByInDelete()
+    {
+        if (! $this->runHybridIntegrations()) {
+            return;
+        }
+
+        $this->createTable(function (Blueprint $table) {
+            $table->id();
+        });
+
+        DB::table('test')->insert([
+            ['id' => 1],
+        ]);
+
+        DB::table('test')->orderBy('id', 'asc')->delete();
+    }
+
+    /** @test */
+    public function ignoresOrderByInUpdate()
+    {
+        if (! $this->runHybridIntegrations()) {
+            return;
+        }
+
+        $this->createTable(function (Blueprint $table) {
+            $table->id();
+            $table->string('a');
+        });
+
+        DB::table('test')->insert([
+            ['id' => 1, 'a' => 'a'],
+        ]);
+
+        DB::table('test')->orderBy('id', 'asc')->update(['id' => 1, 'a' => 'b']);
+    }
+}