diff -r 000000000000 -r 7f95f8617b0b vendor/doctrine-dbal/lib/Doctrine/DBAL/Query/Expression/ExpressionBuilder.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/doctrine-dbal/lib/Doctrine/DBAL/Query/Expression/ExpressionBuilder.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,264 @@
+<?php
+/*
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * This software consists of voluntary contributions made by many individuals
+ * and is licensed under the LGPL. For more information, see
+ * <http://www.doctrine-project.org>.
+ */
+
+namespace Doctrine\DBAL\Query\Expression;
+
+use Doctrine\DBAL\Connection;
+
+/**
+ * ExpressionBuilder class is responsible to dynamically create SQL query parts.
+ *
+ * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL
+ * @link        www.doctrine-project.com
+ * @since       2.1
+ * @author      Guilherme Blanco <guilhermeblanco@hotmail.com>
+ * @author      Benjamin Eberlei <kontakt@beberlei.de>
+ */
+class ExpressionBuilder
+{
+    const EQ  = '=';
+    const NEQ = '<>';
+    const LT  = '<';
+    const LTE = '<=';
+    const GT  = '>';
+    const GTE = '>=';
+    
+    /**
+     * @var Doctrine\DBAL\Connection DBAL Connection
+     */
+    private $connection = null;
+
+    /**
+     * Initializes a new <tt>ExpressionBuilder</tt>.
+     *
+     * @param Doctrine\DBAL\Connection $connection DBAL Connection
+     */
+    public function __construct(Connection $connection)
+    {
+        $this->connection = $connection;
+    }
+    
+    /**
+     * Creates a conjunction of the given boolean expressions.
+     *
+     * Example:
+     *
+     *     [php]
+     *     // (u.type = ?) AND (u.role = ?)
+     *     $expr->andX('u.type = ?', 'u.role = ?'));
+     *
+     * @param mixed $x Optional clause. Defaults = null, but requires
+     *                 at least one defined when converting to string.
+     * @return CompositeExpression
+     */
+    public function andX($x = null)
+    {
+        return new CompositeExpression(CompositeExpression::TYPE_AND, func_get_args());
+    }
+
+    /**
+     * Creates a disjunction of the given boolean expressions.
+     *
+     * Example:
+     *
+     *     [php]
+     *     // (u.type = ?) OR (u.role = ?)
+     *     $qb->where($qb->expr()->orX('u.type = ?', 'u.role = ?'));
+     *
+     * @param mixed $x Optional clause. Defaults = null, but requires
+     *                 at least one defined when converting to string.
+     * @return CompositeExpression
+     */
+    public function orX($x = null)
+    {
+        return new CompositeExpression(CompositeExpression::TYPE_OR, func_get_args());
+    }
+
+    /**
+     * Creates a comparison expression.
+     * 
+     * @param mixed $x Left expression
+     * @param string $operator One of the ExpressionBuikder::* constants.
+     * @param mixed $y Right expression
+     * @return string
+     */
+    public function comparison($x, $operator, $y)
+    {
+        return $x . ' ' . $operator . ' ' . $y;
+    }
+    
+    /**
+     * Creates an equality comparison expression with the given arguments.
+     *
+     * First argument is considered the left expression and the second is the right expression.
+     * When converted to string, it will generated a <left expr> = <right expr>. Example:
+     *
+     *     [php]
+     *     // u.id = ?
+     *     $expr->eq('u.id', '?');
+     *
+     * @param mixed $x Left expression
+     * @param mixed $y Right expression
+     * @return string
+     */
+    public function eq($x, $y)
+    {
+        return $this->comparison($x, self::EQ, $y);
+    }
+
+    /**
+     * Creates a non equality comparison expression with the given arguments.
+     * First argument is considered the left expression and the second is the right expression.
+     * When converted to string, it will generated a <left expr> <> <right expr>. Example:
+     *
+     *     [php]
+     *     // u.id <> 1
+     *     $q->where($q->expr()->neq('u.id', '1'));
+     *
+     * @param mixed $x Left expression
+     * @param mixed $y Right expression
+     * @return string
+     */
+    public function neq($x, $y)
+    {
+        return $this->comparison($x, self::NEQ, $y);
+    }
+
+    /**
+     * Creates a lower-than comparison expression with the given arguments.
+     * First argument is considered the left expression and the second is the right expression.
+     * When converted to string, it will generated a <left expr> < <right expr>. Example:
+     *
+     *     [php]
+     *     // u.id < ?
+     *     $q->where($q->expr()->lt('u.id', '?'));
+     *
+     * @param mixed $x Left expression
+     * @param mixed $y Right expression
+     * @return string
+     */
+    public function lt($x, $y)
+    {
+        return $this->comparison($x, self::LT, $y);
+    }
+
+    /**
+     * Creates a lower-than-equal comparison expression with the given arguments.
+     * First argument is considered the left expression and the second is the right expression.
+     * When converted to string, it will generated a <left expr> <= <right expr>. Example:
+     *
+     *     [php]
+     *     // u.id <= ?
+     *     $q->where($q->expr()->lte('u.id', '?'));
+     *
+     * @param mixed $x Left expression
+     * @param mixed $y Right expression
+     * @return string
+     */
+    public function lte($x, $y)
+    {
+        return $this->comparison($x, self::LTE, $y);
+    }
+
+    /**
+     * Creates a greater-than comparison expression with the given arguments.
+     * First argument is considered the left expression and the second is the right expression.
+     * When converted to string, it will generated a <left expr> > <right expr>. Example:
+     *
+     *     [php]
+     *     // u.id > ?
+     *     $q->where($q->expr()->gt('u.id', '?'));
+     *
+     * @param mixed $x Left expression
+     * @param mixed $y Right expression
+     * @return string
+     */
+    public function gt($x, $y)
+    {
+        return $this->comparison($x, self::GT, $y);
+    }
+
+    /**
+     * Creates a greater-than-equal comparison expression with the given arguments.
+     * First argument is considered the left expression and the second is the right expression.
+     * When converted to string, it will generated a <left expr> >= <right expr>. Example:
+     *
+     *     [php]
+     *     // u.id >= ?
+     *     $q->where($q->expr()->gte('u.id', '?'));
+     *
+     * @param mixed $x Left expression
+     * @param mixed $y Right expression
+     * @return string
+     */
+    public function gte($x, $y)
+    {
+        return $this->comparison($x, self::GTE, $y);
+    }
+
+    /**
+     * Creates an IS NULL expression with the given arguments.
+     *
+     * @param string $x Field in string format to be restricted by IS NULL
+     * 
+     * @return string
+     */
+    public function isNull($x)
+    {
+        return $x . ' IS NULL';
+    }
+
+    /**
+     * Creates an IS NOT NULL expression with the given arguments.
+     *
+     * @param string $x Field in string format to be restricted by IS NOT NULL
+     * 
+     * @return string
+     */
+    public function isNotNull($x)
+    {
+        return $x . ' IS NOT NULL';
+    }
+
+    /**
+     * Creates a LIKE() comparison expression with the given arguments.
+     *
+     * @param string $x Field in string format to be inspected by LIKE() comparison.
+     * @param mixed $y Argument to be used in LIKE() comparison.
+     * 
+     * @return string
+     */
+    public function like($x, $y)
+    {
+        return $this->comparison($x, 'LIKE', $y);
+    }
+    
+    /**
+     * Quotes a given input parameter.
+     * 
+     * @param mixed $input Parameter to be quoted.
+     * @param string $type Type of the parameter.
+     * 
+     * @return string
+     */
+    public function literal($input, $type = null)
+    {
+        return $this->connection->quote($input, $type);
+    }
+}
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