Issue #3120892 by Kumar Kundan, ravi.shankar, julienjoye, daffie: Replicate SQL LEAST() in SQLite (b5343b93) · Commits · project / drupal

core/lib/Drupal/Core/Database/Driver/sqlite/Connection.php

+11 −0

Original line number	Diff line number	Diff line
		@@ -133,6 +133,7 @@ public static function open(array &$connection_options = []) {
		// Create functions needed by SQLite.
		$pdo->sqliteCreateFunction('if', [__CLASS__, 'sqlFunctionIf']);
		$pdo->sqliteCreateFunction('greatest', [__CLASS__, 'sqlFunctionGreatest']);
		$pdo->sqliteCreateFunction('least', [__CLASS__, 'sqlFunctionLeast']);
		$pdo->sqliteCreateFunction('pow', 'pow', 2);
		$pdo->sqliteCreateFunction('exp', 'exp', 1);
		$pdo->sqliteCreateFunction('length', 'strlen', 1);
		@@ -239,6 +240,16 @@ public static function sqlFunctionGreatest() {
		}
		}

		/**
		* SQLite compatibility implementation for the LEAST() SQL function.
		*/
		public static function sqlFunctionLeast() {
		// Remove all NULL, FALSE and empty strings values but leaves 0 (zero) values.
		$values = array_filter(func_get_args(), 'strlen');

		return count($values) < 1 ? NULL : min($values);
		}

		/**
		* SQLite compatibility implementation for the CONCAT() SQL function.
		*/

0 → 100644

+32 −0

Original line number	Diff line number	Diff line
		<?php

		namespace Drupal\KernelTests\Core\Database;

		/**
		* Tests the SQL LEAST operator.
		*
		* @group Database
		*/
		class SelectLeastTest extends DatabaseTestBase {

		/**
		* Tests the SQL LEAST operator.
		*
		* @dataProvider selectLeastProvider
		*/
		public function testSelectLeast($values, $expected) {
		$least = $this->connection->query("SELECT LEAST(:values[])", [':values[]' => $values])->fetchField();
		$this->assertEquals($expected, $least);
		}

		public function selectLeastProvider() {
		return [
		[[1, 2, 3, 4, 5, 6], 1],
		[['A', 'B', 'C', 'NULL', 'F'], 'A'],
		[['NULL', 'NULL'], 'NULL'],
		[['TRUE', 'FALSE'], 'FALSE'],
		[['A', 'B', 'C', 'NULL'], 'A'],
		];
		}

		}