Add hour to DATE_ADD and DATE_SUB

lib/Doctrine/DBAL/Platforms/AbstractPlatform.php

@@ -939,6 +939,36 @@ abstract class AbstractPlatform
         throw DBALException::notSupported(__METHOD__);
     }
 
+    /**
+     * Returns the SQL to add the number of given hours to a date.
+     *
+     * @param string  $date
+     * @param integer $hours
+     *
+     * @return string
+     *
+     * @throws \Doctrine\DBAL\DBALException If not supported on this platform.
+     */
+    public function getDateAddHourExpression($date, $hours)
+    {
+        throw DBALException::notSupported(__METHOD__);
+    }
+
+    /**
+     * Returns the SQL to subtract the number of given hours to a date.
+     *
+     * @param string  $date
+     * @param integer $hours
+     *
+     * @return string
+     *
+     * @throws \Doctrine\DBAL\DBALException If not supported on this platform.
+     */
+    public function getDateSubHourExpression($date, $hours)
+    {
+        throw DBALException::notSupported(__METHOD__);
+    }
+
     /**
      * Returns the SQL to add the number of given days to a date.
      *

lib/Doctrine/DBAL/Platforms/DrizzlePlatform.php

@@ -65,6 +65,22 @@ class DrizzlePlatform extends AbstractPlatform
         return 'DATEDIFF(' . $date1 . ', ' . $date2 . ')';
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    public function getDateAddHourExpression($date, $hours)
+    {
+        return 'DATE_ADD(' . $date . ', INTERVAL ' . $hours . ' HOUR)';
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getDateSubHourExpression($date, $hours)
+    {
+        return 'DATE_SUB(' . $date . ', INTERVAL ' . $hours . ' HOUR)';    
+    }
+
     /**
      * {@inheritDoc}
      */

lib/Doctrine/DBAL/Platforms/MySqlPlatform.php

@@ -115,6 +115,22 @@ class MySqlPlatform extends AbstractPlatform
         return 'DATEDIFF(' . $date1 . ', ' . $date2 . ')';
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    public function getDateAddHourExpression($date, $hours)
+    {
+        return 'DATE_ADD(' . $date . ', INTERVAL ' . $hours . ' HOUR)';
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getDateSubHourExpression($date, $hours)
+    {
+        return 'DATE_SUB(' . $date . ', INTERVAL ' . $hours . ' HOUR)';    
+    }
+
     /**
      * {@inheritDoc}
      */

lib/Doctrine/DBAL/Platforms/OraclePlatform.php

@@ -110,6 +110,22 @@ class OraclePlatform extends AbstractPlatform
         return "TRUNC(TO_NUMBER(SUBSTR((" . $date1 . "-" . $date2 . "), 1, INSTR(" . $date1 . "-" . $date2 .", ' '))))";
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    public function getDateAddHourExpression($date, $hours)
+    {
+        return '(' . $date . '+' . $hours . '/24)';
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getDateSubHourExpression($date, $hours)
+    {
+        return '(' . $date . '-' . $hours . '/24)';
+    }
+
     /**
      * {@inheritDoc}
      */

lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php

@@ -100,6 +100,22 @@ class PostgreSqlPlatform extends AbstractPlatform
         return '(DATE(' . $date1 . ')-DATE(' . $date2 . '))';
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    public function getDateAddHourExpression($date, $hours)
+    {
+        return "(" . $date ." + (" . $hours . " || ' hour')::interval)";
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getDateSubHourExpression($date, $hours)
+    {
+        return "(" . $date ." - (" . $hours . " || ' hour')::interval)";    
+    }
+
     /**
      * {@inheritDoc}
      */

lib/Doctrine/DBAL/Platforms/SQLServerPlatform.php

@@ -46,6 +46,22 @@ class SQLServerPlatform extends AbstractPlatform
         return 'DATEDIFF(day, ' . $date2 . ',' . $date1 . ')';
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    public function getDateAddHourExpression($date, $hours)
+    {
+        return 'DATEADD(hour, ' . $hours . ', ' . $date . ')';
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getDateSubHourExpression($date, $hours)
+    {
+        return 'DATEADD(hour, -1 * ' . $hours . ', ' . $date . ')';
+    }
+
     /**
      * {@inheritDoc}
      */

lib/Doctrine/DBAL/Platforms/SqlitePlatform.php

@@ -130,6 +130,22 @@ class SqlitePlatform extends AbstractPlatform
         return 'ROUND(JULIANDAY('.$date1 . ')-JULIANDAY('.$date2.'))';
     }
 
+    /**
+     * {@inheritDoc}
+     */
+    public function getDateAddHourExpression($date, $hours)
+    {
+        return "DATE(" . $date . ",'+". $hours . " hour')";
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getDateSubHourExpression($date, $hours)
+    {
+        return "DATE(" . $date . ",'-". $hours . " hour')";
+    }
+
     /**
      * {@inheritDoc}
      */