Prepwork for 'returning' method of Query builder

README.md

@@ -2,22 +2,20 @@
 
 A query builder/database abstraction layer, using prepared statements for security.
 
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 ## Requirements
-* PDO extensions for the databases you wish to use (unless it's Firebird, in which case, the interbase extension is required)
-* PHP 7.1 or later
+* PDO extensions for the databases you wish to use
+* PHP 7.2 or later
 
 ## Databases Supported
 
-* MySQL
-* PostgreSQL
+* MySQL 5+ / MariaDB
+* PostgreSQL 8.4+
 * SQLite
 
 ## Including Query in your application
@@ -102,7 +100,7 @@ An example of a moderately complex query:
 $query = $db->select('id, key as k, val')
 	->from('table t')
 	->where('k >', 3)
-	->orWhere('id !=' 5)
+	->orWhere('id !=', 5)
 	->orderBy('val', 'DESC')
 	->limit(3, 1)
 	->get();
@@ -120,7 +118,7 @@ LIMIT 3 OFFSET 1
 ```
 
 The query execution methods `get`, `getWhere`, `insert`,
- `insertBatch`,`update`, and `delete` return a native [PDOStatemnt](http://php.net/manual/en/class.pdostatement.php) object.
+ `insertBatch`,`update`, and `delete` return a native [PDOStatement](http://php.net/manual/en/class.pdostatement.php) object.
 To retrieve the results of a query, use the PDOStatement method [fetch](http://php.net/manual/en/pdostatement.fetch.php) and/or
 [fetchAll](http://php.net/manual/en/pdostatement.fetchall.php).
 

src/Drivers/AbstractDriver.php

@@ -474,6 +474,16 @@ abstract class AbstractDriver
 		return $this->driverQuery('typeList', FALSE);
 	}
 
+	/**
+	 * Get the version of the database engine
+	 *
+	 * @return string
+	 */
+	public function getVersion(): string
+	{
+		return $this->getAttribute(PDO::ATTR_SERVER_VERSION);
+	}
+
 	/**
 	 * Method to simplify retrieving db results for meta-data queries
 	 *
@@ -653,6 +663,18 @@ abstract class AbstractDriver
 		return $this->statement;
 	}
 
+	/**
+	 * Generate the returning clause for the current database
+	 *
+	 * @param string $query
+	 * @param string $select
+	 * @return string
+	 */
+	public function returning(string $query, string $select): string
+	{
+		return "{$query} RETURNING {$select}";
+	}
+
 	/**
 	 * Helper method for quote_ident
 	 *

src/Drivers/DriverInterface.php

@@ -253,6 +253,13 @@ interface DriverInterface /* extends the interface of PDO */ {
 	 */
 	public function getUtil(): AbstractUtil;
 
+	/**
+	 * Get the version of the database engine
+	 *
+	 * @return string
+	 */
+	public function getVersion(): string;
+
 	/**
 	 * Get the last sql query executed
 	 *

src/Drivers/Mysql/Driver.php

@@ -63,4 +63,34 @@ class Driver extends AbstractDriver {
 
 		parent::__construct($dsn, $username, $password, $options);
 	}
+
+	/**
+	 * Generate the returning clause for the current database
+	 *
+	 * @param string $query
+	 * @param string $select
+	 * @return string
+	 */
+	public function returning(string $query, string $select): string
+	{
+		// @TODO add checks for MariaDB for future-proofing
+		// MariaDB 10.5.0+ supports the returning clause for insert
+		if (
+			stripos($query, 'insert') !== FALSE
+			&& version_compare($this->getVersion(), '10.5.0', '>=')
+		){
+			return parent::returning($query, $select);
+		}
+
+		// MariaDB 10.0.5+ supports the returning clause for delete
+		if (
+			stripos($query, 'delete') !== FALSE
+			&& version_compare($this->getVersion(), '10.0.5', '>=')
+		){
+			return parent::returning($query, $select);
+		}
+
+		// Just return the same SQL if the returning clause is not supported
+		return $query;
+	}
 }

src/Drivers/Pgsql/Driver.php

@@ -78,7 +78,9 @@ SQL;
 			{
 				if ( ! isset($valueMap[$key[$type]]))
 				{
+					// @codeCoverageIgnoreStart
 					continue;
+					// @codeCoverageIgnoreEnd
 				}
 
 				$key[$type] = $valueMap[$key[$type]];

src/Drivers/Sqlite/Driver.php

@@ -109,7 +109,7 @@ class Driver extends AbstractDriver {
 	{
 		// If greater than version 3.7.11, supports the same syntax as
 		// MySQL and Postgres
-		if (version_compare($this->getAttribute(PDO::ATTR_SERVER_VERSION), '3.7.11', '>='))
+		if (version_compare($this->getVersion(), '3.7.11', '>='))
 		{
 			return parent::insertBatch($table, $data);
 		}
@@ -145,4 +145,17 @@ class Driver extends AbstractDriver {
 
 		return [$sql, NULL];
 	}
+
+	/**
+	 * Generate the returning clause for the current database
+	 *
+	 * @param string $query
+	 * @param string $select
+	 * @return string
+	 */
+	public function returning(string $query, string $select): string
+	{
+		// Return the same query, as the returning clause is not supported
+		return $query;
+	}
 }

src/QueryType.php

@@ -0,0 +1,26 @@
+<?php declare(strict_types=1);
+/**
+ * Query
+ *
+ * SQL Query Builder / Database Abstraction Layer
+ *
+ * PHP version 7.2
+ *
+ * @package     Query
+ * @author      Timothy J. Warren <tim@timshomepage.net>
+ * @copyright   2012 - 2019 Timothy J. Warren
+ * @license     http://www.opensource.org/licenses/mit-license.html  MIT License
+ * @link        https://git.timshomepage.net/aviat/Query
+ * @version     3.0.0
+ */
+namespace Query;
+
+/**
+ * 'Enum' of query types
+ */
+class QueryType {
+	public const SELECT = 'select';
+	public const INSERT = 'insert';
+	public const UPDATE = 'update';
+	public const DELETE = 'delete';
+}

tests/BaseDriverTest.php

@@ -131,5 +131,12 @@ abstract class BaseDriverTest extends TestCase {
 		$funcs = self::$db->getFunctions();
 		$this->assertTrue(\is_array($funcs));
 	}
+
+	public function testGetVersion(): void
+	{
+		$version = self::$db->getVersion();
+		$this->assertTrue(is_string($version));
+		$this->assertTrue(strlen($version) > 0);
+	}
 }
 // End of db_test.php

tests/ConnectionManagerTest.php

@@ -24,6 +24,7 @@ class ConnectionManagerTest extends TestCase {
 
 	public static function setUpBeforeClass(): void
 	{
+		ConnectionManager::getInstance();
 		self::$instance = ConnectionManager::getInstance();
 	}
 

tests/Drivers/MySQL/MySQLDriverTest.php

@@ -23,7 +23,6 @@ use TypeError;
 /**
  * MySQLTest class.
  *
- * @covers \Query\Drivers\Mysql\Driver
  * @requires extension pdo_mysql
  */
 class MySQLDriverTest extends BaseDriverTest {

tests/Drivers/PgSQL/PgSQLDriverTest.php

@@ -25,7 +25,6 @@ use TypeError;
  *
  * @extends DBTest
  * @requires extension pdo_pgsql
- * @covers \Query\Drivers\Pgsql\Driver
  */
 class PgSQLDriverTest extends BaseDriverTest {
 

tests/Drivers/SQLite/SQLiteDriverTest.php

@@ -25,7 +25,6 @@ use Query\Tests\BaseDriverTest;
  *
  * @extends DBTest
  * @requires extension pdo_sqlite
- * @covers \Query\Drivers\Sqlite\Driver
  */
 class SQLiteDriverTest extends BaseDriverTest {
 
@@ -253,6 +252,9 @@ SQL;
 
 	public function testGetDBs(): void
 	{
+		$driverSQL = self::$db->getSql()->dbList();
+		$this->assertEqual('', $driverSQL);
+
 		$this->assertNull(self::$db->getDbs());
 	}
 

tests/index.php

@@ -35,7 +35,11 @@ namespace Query\Tests {
 		{
 			$class = \get_class($this);
 
-			echo 'Ran test suite: ' . $class . '<br />';
+			if (PHP_SAPI !== 'cli')
+			{
+				echo 'Running test suite: ' . $class . '<br />';
+				flush();
+			}
 
 			if (method_exists($class, 'setupBeforeClass')) {
 				$class::setupBeforeClass();