From b144321c76c2e52127b4640d685dea8eebfc0fdf Mon Sep 17 00:00:00 2001
From: Marcin Kurczewski <mkurczew@gmail.com>
Date: Mon, 24 Feb 2014 00:15:38 +0100
Subject: [PATCH] New Sql operators, because they may come in handy

---
 .../MiscOperators/SqlIfNullOperator.php         | 17 +++++++++++++++++
 .../Operators/UnaryOperators/SqlMaxOperator.php |  8 ++++++++
 2 files changed, 25 insertions(+)
 create mode 100644 src/Sql/Operators/MiscOperators/SqlIfNullOperator.php
 create mode 100644 src/Sql/Operators/UnaryOperators/SqlMaxOperator.php

diff --git a/src/Sql/Operators/MiscOperators/SqlIfNullOperator.php b/src/Sql/Operators/MiscOperators/SqlIfNullOperator.php
new file mode 100644
index 00000000..b2fbe9ef
--- /dev/null
+++ b/src/Sql/Operators/MiscOperators/SqlIfNullOperator.php
@@ -0,0 +1,17 @@
+<?php
+class SqlIfNullOperator extends SqlOperator
+{
+	protected $subject;
+	protected $target;
+
+	public function __construct($subject, $target)
+	{
+		$this->subject = $this->attachExpression($subject);
+		$this->target = $this->attachExpression($target);
+	}
+
+	public function getAsString()
+	{
+		return 'IFNULL (' . $this->subject->getAsString() . ', ' . $this->target->getAsString() . ')';
+	}
+}
diff --git a/src/Sql/Operators/UnaryOperators/SqlMaxOperator.php b/src/Sql/Operators/UnaryOperators/SqlMaxOperator.php
new file mode 100644
index 00000000..0b9a12b3
--- /dev/null
+++ b/src/Sql/Operators/UnaryOperators/SqlMaxOperator.php
@@ -0,0 +1,8 @@
+<?php
+class SqlMaxOperator extends SqlUnaryOperator
+{
+	public function getAsStringNonEmpty()
+	{
+		return 'MAX (' . $this->subject->getAsString() . ')';
+	}
+}