diff --git lib/Doctrine/DBAL/Platforms/AbstractPlatform.php lib/Doctrine/DBAL/Platforms/AbstractPlatform.php
index 742832f..15ad868 100644
--- lib/Doctrine/DBAL/Platforms/AbstractPlatform.php
+++ lib/Doctrine/DBAL/Platforms/AbstractPlatform.php
@@ -583,6 +583,7 @@ abstract class AbstractPlatform
             $columnData['precision'] = $column->getPrecision();
             $columnData['scale'] = $column->getScale();
             $columnData['default'] = $column->getDefault();
+            $columnData['columnDefinition'] = $column->getColumnDefinition();
             // TODO: Fixed? Unsigned?
 
             if(in_array($column->getName(), $options['primary'])) {
@@ -924,7 +925,11 @@ abstract class AbstractPlatform
         $check = (isset($field['check']) && $field['check']) ?
                 ' ' . $field['check'] : '';
 
-        $typeDecl = $field['type']->getSqlDeclaration($field, $this);
+        if (isset($field['columnDefinition'])) {
+            $typeDecl = $this->getCustomTypeDeclarationSql($field);
+        } else {
+            $typeDecl = $field['type']->getSqlDeclaration($field, $this);
+        }
 
         return $name . ' ' . $typeDecl . $charset . $default . $notnull . $unique . $check . $collation;
     }
@@ -1064,6 +1069,19 @@ abstract class AbstractPlatform
     }
 
     /**
+     * getCustomTypeDeclarationSql
+     * Obtail SQL code portion needed to create a custom column,
+     * e.g. when a field has the "columnDefinition" keyword.
+     * Only "AUTOINCREMENT" and "PRIMARY KEY" are added if appropriate.
+     *
+     * @return string
+     */
+    public function getCustomTypeDeclarationSql(array $columnDef)
+    {
+        return $columnDef['columnDefinition'];
+    }
+
+    /**
      * getIndexFieldDeclarationList
      * Obtain DBMS specific SQL code portion needed to set an index
      * declaration to be used in statements like CREATE TABLE.
diff --git lib/Doctrine/DBAL/Platforms/MySqlPlatform.php lib/Doctrine/DBAL/Platforms/MySqlPlatform.php
index d95ecac..71032f9 100644
--- lib/Doctrine/DBAL/Platforms/MySqlPlatform.php
+++ lib/Doctrine/DBAL/Platforms/MySqlPlatform.php
@@ -683,6 +683,17 @@ class MySqlPlatform extends AbstractPlatform
         return $unsigned . $autoinc;
     }
     
+    /** @override */
+    public function getCustomTypeDeclarationSql(array $columnDef)
+    {
+        $autoinc = '';
+        if ( ! empty($columnDef['autoincrement'])) {
+            $autoinc = ' AUTO_INCREMENT';
+        }
+
+        return $columnDef['columnDefinition'] . $autoinc;
+    }
+    
     /**
      * Obtain DBMS specific SQL code portion needed to set an index
      * declaration to be used in statements like CREATE TABLE.
diff --git lib/Doctrine/DBAL/Platforms/SqlitePlatform.php lib/Doctrine/DBAL/Platforms/SqlitePlatform.php
index a5c35fb..e5cb89f 100644
--- lib/Doctrine/DBAL/Platforms/SqlitePlatform.php
+++ lib/Doctrine/DBAL/Platforms/SqlitePlatform.php
@@ -284,6 +284,17 @@ class SqlitePlatform extends AbstractPlatform
         return 'INTEGER' . $pk . $autoinc;
     }
 
+    /** 
+     * @override 
+     */
+    public function getCustomTypeDeclarationSql(array $columnDef)
+    {
+        $autoinc = ! empty($columnDef['autoincrement']) ? ' AUTOINCREMENT' : '';
+        $pk = ! empty($columnDef['primary']) && ! empty($autoinc) ? ' PRIMARY KEY' : '';
+
+        return $columnDef['columnDefinition'] . $pk . $autoinc;
+    }
+
     /**
      * create a new table
      *
diff --git lib/Doctrine/DBAL/Schema/Column.php lib/Doctrine/DBAL/Schema/Column.php
index 23d44e9..3b44688 100644
--- lib/Doctrine/DBAL/Schema/Column.php
+++ lib/Doctrine/DBAL/Schema/Column.php
@@ -81,6 +81,11 @@ class Column extends AbstractAsset
     protected $_platformOptions = array();
 
     /**
+     * @var string
+     */
+    protected $_columnDefinition = null;
+
+    /**
      * Create a new Column
      * 
      * @param string $columnName
@@ -226,6 +231,17 @@ class Column extends AbstractAsset
         return $this;
     }
 
+    /**
+     *
+     * @param  string
+     * @return Column
+     */
+    public function setColumnDefinition($value)
+    {
+        $this->_columnDefinition = $value;
+        return $this;
+    }
+
     public function getType()
     {
         return $this->_type;
@@ -281,6 +297,11 @@ class Column extends AbstractAsset
         return $this->_platformOptions[$name];
     }
 
+    public function getColumnDefinition()
+    {
+        return $this->_columnDefinition;
+    }
+
     /**
      * @param Visitor $visitor
      */
@@ -304,6 +325,7 @@ class Column extends AbstractAsset
             'scale'         => $this->_scale,
             'fixed'         => $this->_fixed,
             'unsigned'      => $this->_unsigned,
+            'columnDefinition' => $this->_columnDefinition,
         ), $this->_platformOptions);
     }
 }
\ No newline at end of file
diff --git lib/Doctrine/ORM/Mapping/Driver/AnnotationDriver.php lib/Doctrine/ORM/Mapping/Driver/AnnotationDriver.php
index 74bf53b..163bc08 100644
--- lib/Doctrine/ORM/Mapping/Driver/AnnotationDriver.php
+++ lib/Doctrine/ORM/Mapping/Driver/AnnotationDriver.php
@@ -196,6 +196,10 @@ class AnnotationDriver implements Driver
                     $mapping['columnName'] = $columnAnnot->name;
                 }
                 
+                if (isset($columnAnnot->columnDefinition)) {
+                    $mapping['columnDefinition'] = $columnAnnot->columnDefinition;
+                }
+                
                 if ($idAnnot = $this->_reader->getPropertyAnnotation($property, 'Doctrine\ORM\Mapping\Id')) {
                     $mapping['id'] = true;
                 }
diff --git lib/Doctrine/ORM/Mapping/Driver/DoctrineAnnotations.php lib/Doctrine/ORM/Mapping/Driver/DoctrineAnnotations.php
index e6a2f32..3d0ae89 100644
--- lib/Doctrine/ORM/Mapping/Driver/DoctrineAnnotations.php
+++ lib/Doctrine/ORM/Mapping/Driver/DoctrineAnnotations.php
@@ -63,6 +63,7 @@ final class Column extends Annotation {
     public $default; //TODO: remove?
     public $name;
     public $options = array();
+    public $columnDefinition;
 }
 final class OneToOne extends Annotation {
     public $targetEntity;
diff --git lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
index ba64abf..3c2e9f9 100644
--- lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
+++ lib/Doctrine/ORM/Mapping/Driver/XmlDriver.php
@@ -154,6 +154,10 @@ class XmlDriver extends AbstractFileDriver
                     $metadata->setVersionMapping($mapping);
                 }
                 
+                if (isset($fieldMapping['columnDefinition'])) {
+                    $mapping['columnDefinition'] = (string)$fieldMapping['columnDefinition'];
+                }
+                
                 $metadata->mapField($mapping);
             }
         }
diff --git lib/Doctrine/ORM/Mapping/Driver/YamlDriver.php lib/Doctrine/ORM/Mapping/Driver/YamlDriver.php
index 822bf7b..2e8f949 100644
--- lib/Doctrine/ORM/Mapping/Driver/YamlDriver.php
+++ lib/Doctrine/ORM/Mapping/Driver/YamlDriver.php
@@ -195,6 +195,9 @@ class YamlDriver extends AbstractFileDriver
                 if (isset($fieldMapping['version']) && $fieldMapping['version']) {
                     $metadata->setVersionMapping($mapping);
                 }
+                if (isset($fieldMapping['columnDefinition'])) {
+                    $mapping['columnDefinition'] = $fieldMapping['columnDefinition'];
+                }
                 
                 $metadata->mapField($mapping);
             }
diff --git lib/Doctrine/ORM/Tools/SchemaTool.php lib/Doctrine/ORM/Tools/SchemaTool.php
index 6889659..d8e1087 100644
--- lib/Doctrine/ORM/Tools/SchemaTool.php
+++ lib/Doctrine/ORM/Tools/SchemaTool.php
@@ -305,6 +305,10 @@ class SchemaTool
         if (isset($mapping['default'])) {
             $options['default'] = $mapping['default'];
         }
+        
+        if (isset($mapping['columnDefinition'])) {
+            $options['columnDefinition'] = $mapping['columnDefinition'];
+        }
 
         if ($table->hasColumn($columnName)) {
             // required in some inheritence scenarios
diff --git tests/Doctrine/Tests/DBAL/Platforms/AbstractPlatformTestCase.php tests/Doctrine/Tests/DBAL/Platforms/AbstractPlatformTestCase.php
index 3d2fe59..75de9d9 100644
--- tests/Doctrine/Tests/DBAL/Platforms/AbstractPlatformTestCase.php
+++ tests/Doctrine/Tests/DBAL/Platforms/AbstractPlatformTestCase.php
@@ -112,4 +112,22 @@ abstract class AbstractPlatformTestCase extends \Doctrine\Tests\DbalTestCase
 
         $this->assertEquals($expectedSql, $sql);
     }
+    
+    public function testGeneratesCustomTypeDeclaration()
+    {
+        $this->assertEquals(
+            'Foo',
+            $this->_platform->getCustomTypeDeclarationSql(array('columnDefinition' => 'Foo')
+        ));
+        $this->assertEquals(
+            'Foo',
+            $this->_platform->getCustomTypeDeclarationSql(
+                array('columnDefinition' => 'Foo', 'autoincrement' => true)
+        ));
+        $this->assertEquals(
+            'Foo',
+            $this->_platform->getCustomTypeDeclarationSql(
+                array('columnDefinition' => 'Foo', 'autoincrement' => true, 'primary' => true)
+        ));
+    }
 }
diff --git tests/Doctrine/Tests/DBAL/Platforms/MySqlPlatformTest.php tests/Doctrine/Tests/DBAL/Platforms/MySqlPlatformTest.php
index a36a479..e436fb5 100644
--- tests/Doctrine/Tests/DBAL/Platforms/MySqlPlatformTest.php
+++ tests/Doctrine/Tests/DBAL/Platforms/MySqlPlatformTest.php
@@ -109,6 +109,24 @@ class MySqlPlatformTest extends AbstractPlatformTestCase
             'Long string declaration is not correct'
         );
     }
+    
+    public function testGeneratesCustomTypeDeclaration()
+    {
+        $this->assertEquals(
+            'Foo',
+            $this->_platform->getCustomTypeDeclarationSql(array('columnDefinition' => 'Foo')
+        ));
+        $this->assertEquals(
+            'Foo AUTO_INCREMENT',
+            $this->_platform->getCustomTypeDeclarationSql(
+                array('columnDefinition' => 'Foo', 'autoincrement' => true)
+        ));
+        $this->assertEquals(
+            'Foo AUTO_INCREMENT',
+            $this->_platform->getCustomTypeDeclarationSql(
+                array('columnDefinition' => 'Foo', 'autoincrement' => true, 'primary' => true)
+        ));
+    }
 
     public function testPrefersIdentityColumns()
     {
diff --git tests/Doctrine/Tests/DBAL/Platforms/OraclePlatformTest.php tests/Doctrine/Tests/DBAL/Platforms/OraclePlatformTest.php
index f059750..61a0f71 100644
--- tests/Doctrine/Tests/DBAL/Platforms/OraclePlatformTest.php
+++ tests/Doctrine/Tests/DBAL/Platforms/OraclePlatformTest.php
@@ -134,6 +134,24 @@ class OraclePlatformTest extends AbstractPlatformTestCase
         );
     }
 
+    public function testGeneratesCustomTypeDeclaration()
+    {
+        $this->assertEquals(
+            'Foo',
+            $this->_platform->getCustomTypeDeclarationSql(array('columnDefinition' => 'Foo')
+        ));
+        $this->assertEquals(
+            'Foo',
+            $this->_platform->getCustomTypeDeclarationSql(
+                array('columnDefinition' => 'Foo', 'autoincrement' => true)
+        ));
+        $this->assertEquals(
+            'Foo',
+            $this->_platform->getCustomTypeDeclarationSql(
+                array('columnDefinition' => 'Foo', 'autoincrement' => true, 'primary' => true)
+        ));
+    }
+
     public function testPrefersIdentityColumns()
     {
         $this->assertFalse($this->_platform->prefersIdentityColumns());
diff --git tests/Doctrine/Tests/DBAL/Platforms/SqlitePlatformTest.php tests/Doctrine/Tests/DBAL/Platforms/SqlitePlatformTest.php
index 04f52ea..dc423d9 100644
--- tests/Doctrine/Tests/DBAL/Platforms/SqlitePlatformTest.php
+++ tests/Doctrine/Tests/DBAL/Platforms/SqlitePlatformTest.php
@@ -74,6 +74,24 @@ class SqlitePlatformTest extends AbstractPlatformTestCase
             'Long string declaration is not correct'
         );
     }
+    
+    public function testGeneratesCustomTypeDeclaration()
+    {
+        $this->assertEquals(
+            'Foo',
+            $this->_platform->getCustomTypeDeclarationSql(array('columnDefinition' => 'Foo')
+        ));
+        $this->assertEquals(
+            'Foo AUTOINCREMENT',
+            $this->_platform->getCustomTypeDeclarationSql(
+                array('columnDefinition' => 'Foo', 'autoincrement' => true)
+        ));
+        $this->assertEquals(
+            'Foo PRIMARY KEY AUTOINCREMENT',
+            $this->_platform->getCustomTypeDeclarationSql(
+                array('columnDefinition' => 'Foo', 'autoincrement' => true, 'primary' => true)
+        ));
+    }
 
     public function getGenerateIndexSql()
     {
diff --git tests/Doctrine/Tests/DBAL/Schema/ColumnTest.php tests/Doctrine/Tests/DBAL/Schema/ColumnTest.php
index 931dace..354e034 100644
--- tests/Doctrine/Tests/DBAL/Schema/ColumnTest.php
+++ tests/Doctrine/Tests/DBAL/Schema/ColumnTest.php
@@ -44,6 +44,7 @@ class ColumnTest extends \PHPUnit_Framework_TestCase
             'scale' => 2,
             'fixed' => true,
             'unsigned' => true,
+            'columnDefinition' => 'Foo',
             'foo' => 'bar',
         );
 
@@ -63,6 +64,7 @@ class ColumnTest extends \PHPUnit_Framework_TestCase
             'notnull' => false,
             'fixed' => true,
             'default' => 'baz',
+            'columnDefinition' => 'Foo',
             'platformOptions' => array('foo' => 'bar'),
         );