refactor: convert dates to timestamps

README.md

@@ -21,7 +21,6 @@ Naming used here is the same as in ClickHouse docs.
 
 - [Setup](#setup)
   - [Logging](#logging)
-  - [Time Zones](#time-zones)
   - [PSR Factories who?](#psr-factories-who)
 - [Sync API](#sync-api)
   - [Select](#select)
@@ -64,7 +63,6 @@ $clickHouseClient = new PsrClickHouseClient(
     ),
     new LoggerChain(),
     [],
-    new DateTimeZone('UTC')
 );
 ```
 
@@ -87,25 +85,6 @@ framework:
                     database: '%clickhouse.database%'
 ```
 
-### Time Zones
-
-ClickHouse does not have date times with timezones. 
-Therefore you need to normalize DateTimes' timezones passed as parameters to ensure proper input format.
-
-Following would be inserted as `2020-01-31 01:00:00` into ClickHouse. 
-
-```php
-new DateTimeImmutable('2020-01-31 01:00:00', new DateTimeZone('Europe/Prague'));
-```
-
-If your server uses `UTC`, the value is incorrect for you actually need to insert `2020-01-31 00:00:00`.
-
-Time zone normalization is enabled by passing `DateTimeZone` into `PsrClickHouseClient` constructor.
-
-```php
-new PsrClickHouseClient(..., new DateTimeZone('UTC'));
-```
-
 ### PSR Factories who?
 
 _The library does not implement it's own HTTP. 
@@ -218,7 +197,7 @@ This produces `SELECT 'value'` and it can be passed to `ClickHouseClient::select
 
 Supported types are:
 - scalars
-- DateTimeImmutable (`\DateTime` is not supported because `ValueFormatter` might modify its timezone so it's not considered safe)
+- DateTimeInterface
 - [Expression](#expression)
 - objects implementing `__toString()`
 

src/Client/PsrClickHouseAsyncClient.php

@@ -4,7 +4,6 @@
 
 namespace SimPod\ClickHouseClient\Client;
 
-use DateTimeZone;
 use Exception;
 use GuzzleHttp\Promise\Create;
 use GuzzleHttp\Promise\PromiseInterface;
@@ -32,9 +31,8 @@ public function __construct(
         private RequestFactory $requestFactory,
         private SqlLogger|null $sqlLogger = null,
         private array $defaultSettings = [],
-        DateTimeZone|null $clickHouseTimeZone = null,
     ) {
-        $this->sqlFactory = new SqlFactory(new ValueFormatter($clickHouseTimeZone));
+        $this->sqlFactory = new SqlFactory(new ValueFormatter());
     }
 
     /**

src/Client/PsrClickHouseClient.php

@@ -4,7 +4,6 @@
 
 namespace SimPod\ClickHouseClient\Client;
 
-use DateTimeZone;
 use InvalidArgumentException;
 use Psr\Http\Client\ClientExceptionInterface;
 use Psr\Http\Client\ClientInterface;
@@ -49,9 +48,8 @@ public function __construct(
         private RequestFactory $requestFactory,
         private SqlLogger|null $sqlLogger = null,
         private array $defaultSettings = [],
-        DateTimeZone|null $clickHouseTimeZone = null,
     ) {
-        $this->valueFormatter = new ValueFormatter($clickHouseTimeZone);
+        $this->valueFormatter = new ValueFormatter();
         $this->sqlFactory     = new SqlFactory($this->valueFormatter);
     }
 

src/Param/ParamValueConverterRegistry.php

@@ -267,14 +267,15 @@ private static function decimalConverter(): Closure
     private static function dateConverter(): Closure
     {
         return static fn (DateTimeInterface|string|int|float $value) => $value instanceof DateTimeInterface
+            // We cannot convert to timestamp yet https://github.com/ClickHouse/ClickHouse/issues/75217
             ? $value->format('Y-m-d')
             : $value;
     }
 
     private static function dateTimeConverter(): Closure
     {
         return static fn (DateTimeInterface|string|int|float $value) => $value instanceof DateTimeInterface
-            ? $value->format('Y-m-d H:i:s')
+            ? $value->getTimestamp()
             : $value;
     }
 

src/Sql/ValueFormatter.php

@@ -5,8 +5,7 @@
 namespace SimPod\ClickHouseClient\Sql;
 
 use BackedEnum;
-use DateTimeImmutable;
-use DateTimeZone;
+use DateTimeInterface;
 use SimPod\ClickHouseClient\Exception\UnsupportedParamValue;
 
 use function array_key_first;
@@ -26,10 +25,6 @@
 /** @internal */
 final readonly class ValueFormatter
 {
-    public function __construct(private DateTimeZone|null $dateTimeZone = null)
-    {
-    }
-
     /** @throws UnsupportedParamValue */
     public function format(mixed $value, string|null $paramName = null, string|null $sql = null): string
     {
@@ -66,12 +61,8 @@ public function format(mixed $value, string|null $paramName = null, string|null
                 : (string) $value->value;
         }
 
-        if ($value instanceof DateTimeImmutable) {
-            if ($this->dateTimeZone !== null) {
-                $value = $value->setTimezone($this->dateTimeZone);
-            }
-
-            return "'" . $value->format('Y-m-d H:i:s') . "'";
+        if ($value instanceof DateTimeInterface) {
+            return (string) $value->getTimestamp();
         }
 
         if ($value instanceof Expression) {

tests/Client/Http/RequestFactoryTest.php

@@ -78,11 +78,10 @@ public function testParamParsed(): void
             new Psr17Factory(),
         );
 
-        $now     = new DateTimeImmutable();
-        $nowDate = $now->format('Y-m-d');
+        $now = new DateTimeImmutable();
 
         $request = $requestFactory->prepareSqlRequest(
-            'SELECT {p1:String}, {p_2:Date}',
+            'SELECT {p1:String}, {p_2:DateTime}',
             new RequestSettings(
                 [],
                 [],
@@ -104,7 +103,7 @@ public function testParamParsed(): void
                     'Content-Disposition: form-data; name="param_p_2"',
                     'Content-Length: 10',
                     '',
-                    $nowDate,
+                    $now->getTimestamp(),
                 ],
             ),
             $body,

tests/Sql/ExpressionFactoryTest.php

@@ -4,7 +4,6 @@
 
 namespace SimPod\ClickHouseClient\Tests\Sql;
 
-use DateTimeZone;
 use PHPUnit\Framework\Attributes\CoversClass;
 use PHPUnit\Framework\Attributes\DataProvider;
 use SimPod\ClickHouseClient\Sql\ExpressionFactory;
@@ -18,7 +17,7 @@ final class ExpressionFactoryTest extends TestCaseBase
     #[DataProvider('providerTemplateAndValues')]
     public function testTemplateAndValues(string $expectedExpressionString, string $template, array $values): void
     {
-        $expressionFactory = new ExpressionFactory(new ValueFormatter(new DateTimeZone('UTC')));
+        $expressionFactory = new ExpressionFactory(new ValueFormatter());
 
         self::assertSame(
             $expectedExpressionString,

tests/Sql/ValueFormatterTest.php

@@ -28,7 +28,7 @@ public function testFormat(
     ): void {
         self::assertSame(
             $expectedValue,
-            (new ValueFormatter(new DateTimeZone('UTC')))->format($value, $paramName, $sql),
+            (new ValueFormatter())->format($value, $paramName, $sql),
         );
     }
 
@@ -68,9 +68,9 @@ public static function providerFormat(): iterable
             'SELECT * FROM table WHERE (a,b) IN (:tuples)',
         ];
 
-        yield 'DateTimeImmutable' => ["'2020-01-31 01:23:45'", new DateTimeImmutable('2020-01-31 01:23:45')];
+        yield 'DateTimeImmutable' => ['1580433825', new DateTimeImmutable('2020-01-31 01:23:45')];
         yield 'DateTimeImmutable different PHP and ClickHouse timezones' => [
-            "'2020-01-31 01:23:45'",
+            '1580433825',
             new DateTimeImmutable('2020-01-31 02:23:45', new DateTimeZone('Europe/Prague')),
         ];