TemporaryQueryTestBase.php

<?php

declare (strict_types=1);
namespace Drupal\KernelTests\Core\Database;

use Drupal\Core\Database\Database;

/**
 * Tests the temporary query functionality.
 *
 * @group Database
 */
abstract class TemporaryQueryTestBase extends DriverSpecificDatabaseTestBase {
    
    /**
     * Returns the connection.
     */
    public function getConnection() {
        return Database::getConnection();
    }
    
    /**
     * Returns the number of rows of a table.
     */
    public function countTableRows($table_name) {
        return Database::getConnection()->select($table_name)
            ->countQuery()
            ->execute()
            ->fetchField();
    }
    
    /**
     * Confirms that temporary tables work.
     */
    public function testTemporaryQuery() : void {
        $connection = $this->getConnection();
        // Now try to run two temporary queries in the same request.
        $table_name_test = $connection->queryTemporary('SELECT [name] FROM {test}', []);
        $table_name_task = $connection->queryTemporary('SELECT [pid] FROM {test_task}', []);
        $this->assertEquals($this->countTableRows('test'), $this->countTableRows($table_name_test), 'A temporary table was created successfully in this request.');
        $this->assertEquals($this->countTableRows('test_task'), $this->countTableRows($table_name_task), 'A second temporary table was created successfully in this request.');
        // Check that leading whitespace and comments do not cause problems
        // in the modified query.
        $sql = "\n      -- Let's select some rows into a temporary table\n      SELECT [name] FROM {test}\n    ";
        $table_name_test = $connection->queryTemporary($sql, []);
        $this->assertEquals($this->countTableRows('test'), $this->countTableRows($table_name_test), 'Leading white space and comments do not interfere with temporary table creation.');
    }

}