fix Postgres 18 exception classification

src/Drivers/PdoPgsql/PdoPgsqlDriver.php

@@ -141,7 +141,7 @@ protected function createException(string $error, int $errorNo, string $sqlState
 		} elseif ($sqlState === '23502') {
 			return new NotNullConstraintViolationException($error, $errorNo, $sqlState, null, $query);
 
-		} elseif ($sqlState === '23503') {
+		} elseif ($sqlState === '23001' || $sqlState === '23503') {
 			return new ForeignKeyConstraintViolationException($error, $errorNo, $sqlState, null, $query);
 
 		} elseif ($sqlState === '23505') {

src/Drivers/Pgsql/PgsqlDriver.php

@@ -341,7 +341,7 @@ protected function createException(string $error, int $errorNo, ?string $sqlStat
 		} elseif ($sqlState === '23502') {
 			return new NotNullConstraintViolationException($error, $errorNo, $sqlState, null, $query);
 
-		} elseif ($sqlState === '23503') {
+		} elseif ($sqlState === '23001' || $sqlState === '23503') {
 			return new ForeignKeyConstraintViolationException($error, $errorNo, $sqlState, null, $query);
 
 		} elseif ($sqlState === '23505') {

tests/cases/integration/exceptions.postgres.phpt

@@ -0,0 +1,47 @@
+<?php declare(strict_types = 1);
+
+/**
+ * @testCase
+ * @dataProvider? ../../databases.ini pgsql
+ */
+
+namespace NextrasTests\Dbal;
+
+use Nextras\Dbal\Drivers\Exception\ForeignKeyConstraintViolationException;
+use Tester\Assert;
+
+require_once __DIR__ . '/../../bootstrap.php';
+
+
+class ExceptionsPostgresTest extends IntegrationTestCase
+{
+
+	public function testForeignKeyRestrictException()
+	{
+		$this->lockConnection($this->connection);
+
+		$this->connection->query('DROP TABLE IF EXISTS dbal_restrict_children');
+		$this->connection->query('DROP TABLE IF EXISTS dbal_restrict_parents');
+		$this->connection->query('CREATE TABLE dbal_restrict_parents (id INT PRIMARY KEY)');
+		$this->connection->query('
+			CREATE TABLE dbal_restrict_children (
+				parent_id INT NOT NULL REFERENCES dbal_restrict_parents (id) ON DELETE RESTRICT
+			)
+		');
+		$this->connection->query('INSERT INTO dbal_restrict_parents (id) VALUES (1)');
+		$this->connection->query('INSERT INTO dbal_restrict_children (parent_id) VALUES (1)');
+
+		try {
+			Assert::exception(function () {
+				$this->connection->query('DELETE FROM dbal_restrict_parents WHERE id = 1');
+			}, ForeignKeyConstraintViolationException::class);
+		} finally {
+			$this->connection->query('DROP TABLE IF EXISTS dbal_restrict_children');
+			$this->connection->query('DROP TABLE IF EXISTS dbal_restrict_parents');
+		}
+	}
+}
+
+
+$test = new ExceptionsPostgresTest();
+$test->run();

tests/cases/integration/platform.postgres.phpt

@@ -287,6 +287,8 @@ class PlatformPostgresTest extends IntegrationTestCase
 
 	public function testPrimarySequence(): void
 	{
+		$this->lockConnection($this->connection);
+
 		Assert::same('public.books_id_seq', $this->connection->getPlatform()->getPrimarySequenceName('books'));
 
 		$this->connection->query("DROP SEQUENCE IF EXISTS second_schema.temp_sequence_for_test");