fixing delimiter issuer with simple function case and add a unit test for this case too.

Author: David Maechler

src/SQLParser/Node/SimpleFunction.php

@@ -172,7 +172,7 @@ public function toSql(array $parameters = array(), Connection $dbConnection = nu
         if (!empty($this->baseExpression)) {
             $sql .= $this->baseExpression.'(';
         }
-        $sql .= NodeFactory::toSql($this->subTree, $dbConnection, $parameters, ' ', false, $indent, $conditionsMode);
+        $sql .= NodeFactory::toSql($this->subTree, $dbConnection, $parameters, ',', false, $indent, $conditionsMode);
         if (!empty($this->baseExpression)) {
             $sql .= ')';
         }

tests/Mouf/Database/MagicQueryTest.php

@@ -12,6 +12,9 @@ public function testStandardSelect()
     {
         $magicQuery = new MagicQuery();
 
+        $sql = "SELECT DATE_FORMAT(CURDATE(), '%d/%m/%Y') AS current_date FROM users WHERE name LIKE :name";
+        $this->assertEquals("SELECT DATE_FORMAT(CURDATE(), '%d/%m/%Y') AS current_date FROM users WHERE name LIKE 'foo'", self::simplifySql($magicQuery->build($sql, ['name' => 'foo'])));
+
         $sql = 'SELECT YEAR(CURDATE()) AS current_year FROM users WHERE name LIKE :name';
         $this->assertEquals("SELECT YEAR(CURDATE()) AS current_year FROM users WHERE name LIKE 'foo'", self::simplifySql($magicQuery->build($sql, ['name' => 'foo'])));