Add Version snippet

README.md

@@ -252,3 +252,4 @@ $currentDatabaseName = CurrentDatabase::run($client);
 - ShowCreateTable
 - ShowDatabases
 - TableSizes
+- Version

src/Snippet/Version.php

@@ -0,0 +1,29 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimPod\ClickHouseClient\Snippet;
+
+use SimPod\ClickHouseClient\Client\ClickHouseClient;
+use SimPod\ClickHouseClient\Format\JsonEachRow;
+use function assert;
+use function is_string;
+
+final class Version
+{
+    public static function run(ClickHouseClient $clickHouseClient) : string
+    {
+        $version = $clickHouseClient->select(
+            <<<CLICKHOUSE
+SELECT version() AS version
+CLICKHOUSE,
+            new JsonEachRow()
+        );
+
+        /** @psalm-suppress MixedAssignment */
+        $version = $version->data[0]['version'];
+        assert(is_string($version));
+
+        return $version;
+    }
+}

tests/Snippet/VersionTest.php

@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SimPod\ClickHouseClient\Tests\Snippet;
+
+use SimPod\ClickHouseClient\Snippet\Version;
+use SimPod\ClickHouseClient\Tests\TestCaseBase;
+use SimPod\ClickHouseClient\Tests\WithClient;
+
+/** @covers \SimPod\ClickHouseClient\Snippet\Version */
+final class VersionTest extends TestCaseBase
+{
+    use WithClient;
+
+    public function testRun() : void
+    {
+        self::assertRegExp('~(\d+\.)+\d+~', Version::run($this->client));
+    }
+}