diff --git a/system/database/drivers/oci8/oci8_driver.php b/system/database/drivers/oci8/oci8_driver.php
index 2a5149f..f4b899c 100644
--- a/system/database/drivers/oci8/oci8_driver.php
+++ b/system/database/drivers/oci8/oci8_driver.php
@@ -46,7 +46,6 @@
  * permit access to oracle databases
  *
  * @author	  Kelly McArdle
- *
  */
 
 class CI_DB_oci8_driver extends CI_DB {
@@ -249,7 +248,7 @@
 		}
 
 		// build the query string
-		$sql = "BEGIN {$package}.{$procedure}(";
+		$sql = 'BEGIN '.$package.'.'.$procedure.'(';
 
 		$have_cursor = FALSE;
 		foreach ($params as $param)
@@ -359,13 +358,8 @@
 	 */
 	public function trans_rollback()
 	{
-		if ( ! $this->trans_enabled)
-		{
-			return TRUE;
-		}
-
 		// When transactions are nested we only begin/commit/rollback the outermost ones
-		if ($this->_trans_depth > 0)
+		if ( ! $this->trans_enabled OR $this->_trans_depth > 0)
 		{
 			return TRUE;
 		}
@@ -614,12 +608,7 @@
 	 */
 	protected function _from_tables($tables)
 	{
-		if ( ! is_array($tables))
-		{
-			$tables = array($tables);
-		}
-
-		return implode(', ', $tables);
+		return is_array($tables) ? implode(', ', $tables) : $tables;
 	}
 
 	// --------------------------------------------------------------------
diff --git a/system/database/drivers/oci8/oci8_result.php b/system/database/drivers/oci8/oci8_result.php
index e6e9321..0e0fe05 100644
--- a/system/database/drivers/oci8/oci8_result.php
+++ b/system/database/drivers/oci8/oci8_result.php
@@ -194,7 +194,7 @@
 	// --------------------------------------------------------------------
 
 	/**
-	 * Query result. "array" version.
+	 * Query result. Array version.
 	 *
 	 * @return	array
 	 */
@@ -516,7 +516,6 @@
 	 * @param	string	custom class name
 	 * @return	mixed	custom object if row found; empty array otherwise
 	 */
-
 	public function custom_row_object($n = 0, $class_name)
 	{
 		// Make sure $n is not a string