Fix truncating tables

Author: peterfox

src/Query/CockroachGrammar.php

@@ -74,4 +74,15 @@ public function whereFullText(Builder $query, $where)
     {
         throw new FeatureNotSupportedException('Fulltext indexes are not supported by CockroachDB as of version 2.5');
     }
+
+    /**
+     * Compile a truncate table statement into SQL.
+     *
+     * @param  \Illuminate\Database\Query\Builder  $query
+     * @return array
+     */
+    public function compileTruncate(Builder $query)
+    {
+        return ['truncate ' . $this->wrapTable($query->from) . ' cascade' => []];
+    }
 }

tests/Integration/Database/TruncateTableTest.php

@@ -0,0 +1,27 @@
+<?php
+
+namespace YlsIdeas\CockroachDb\Tests\Integration\Database;
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+class TruncateTableTest extends DatabaseTestCase
+{
+    protected function defineDatabaseMigrationsAfterDatabaseRefreshed()
+    {
+        Schema::create('test_truncating_table', function (Blueprint $table) {
+            $table->increments('id');
+            $table->string('name');
+        });
+    }
+
+    public function testTruncatingTables()
+    {
+        DB::table('test_truncating_table')->insert([['name' => 'test']]);
+
+        DB::table('test_truncating_table')->truncate();
+
+        $this->assertDatabaseMissing('test_truncating_table', ['name' => 'test']);
+    }
+}