[DBAL-585] Quote Old column Names when generating ALTER TABLE SQL.

lib/Doctrine/DBAL/Platforms/DB2Platform.php

@@ -391,7 +391,7 @@ class DB2Platform extends AbstractPlatform
 
             /* @var $columnDiff \Doctrine\DBAL\Schema\ColumnDiff */
             $column = $columnDiff->column;
-            $queryParts[] =  'ALTER ' . ($columnDiff->oldColumnName) . ' '
+            $queryParts[] =  'ALTER ' . ($columnDiff->getOldColumnName()->getQuotedName($this)) . ' '
                     . $this->getColumnDeclarationSQL($column->getQuotedName($this), $column->toArray());
         }
 

lib/Doctrine/DBAL/Platforms/DrizzlePlatform.php

@@ -410,7 +410,7 @@ class DrizzlePlatform extends AbstractPlatform
             $column = $columnDiff->column;
             $columnArray = $column->toArray();
             $columnArray['comment'] = $this->getColumnComment($column);
-            $queryParts[] =  'CHANGE ' . ($columnDiff->oldColumnName) . ' '
+            $queryParts[] =  'CHANGE ' . ($columnDiff->getOldColumnName()->getQuotedName($this)) . ' '
                     . $this->getColumnDeclarationSQL($column->getQuotedName($this), $columnArray);
         }
 

lib/Doctrine/DBAL/Platforms/MySqlPlatform.php

@@ -557,7 +557,7 @@ class MySqlPlatform extends AbstractPlatform
             $column = $columnDiff->column;
             $columnArray = $column->toArray();
             $columnArray['comment'] = $this->getColumnComment($column);
-            $queryParts[] =  'CHANGE ' . ($columnDiff->oldColumnName) . ' '
+            $queryParts[] =  'CHANGE ' . ($columnDiff->getOldColumnName()->getQuotedName($this)) . ' '
                     . $this->getColumnDeclarationSQL($column->getQuotedName($this), $columnArray);
         }
 

lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php

@@ -418,7 +418,7 @@ class PostgreSqlPlatform extends AbstractPlatform
                 continue;
             }
 
-            $oldColumnName = $columnDiff->oldColumnName;
+            $oldColumnName = $columnDiff->getOldColumnName()->getQuotedName($this);
             $column = $columnDiff->column;
 
             if ($columnDiff->hasChanged('type') || $columnDiff->hasChanged('precision') || $columnDiff->hasChanged('scale')) {

lib/Doctrine/DBAL/Schema/ColumnDiff.php

@@ -71,4 +71,12 @@ class ColumnDiff
     {
         return in_array($propertyName, $this->changedProperties);
     }
+
+    /**
+     * @return \Doctrine\DBAL\Schema\Identifier
+     */
+    public function getOldColumnName()
+    {
+        return new Identifier($this->oldColumnName);
+    }
 }

tests/Doctrine/Tests/DBAL/Platforms/AbstractPlatformTestCase.php

@@ -494,4 +494,24 @@ abstract class AbstractPlatformTestCase extends \Doctrine\Tests\DbalTestCase
         $sql = $this->_platform->getCreateTableSQL($table, AbstractPlatform::CREATE_FOREIGNKEYS);
         $this->assertEquals($this->getQuotedColumnInForeignKeySQL(), $sql);
     }
+
+    /**
+     * @group DBAL-585
+     */
+    public function testAlterTableChangeQuotedColumn()
+    {
+        $tableDiff = new \Doctrine\DBAL\Schema\TableDiff('mytable');
+        $tableDiff->fromTable = new \Doctrine\DBAL\Schema\Table('mytable');
+        $tableDiff->changedColumns['foo'] = new \Doctrine\DBAL\Schema\ColumnDiff(
+            'select', new \Doctrine\DBAL\Schema\Column(
+                'select', \Doctrine\DBAL\Types\Type::getType('string')
+            ),
+            array('type')
+        );
+
+        $this->assertContains(
+            $this->_platform->quoteIdentifier('select'),
+            implode(';', $this->_platform->getAlterTableSQL($tableDiff))
+        );
+    }
 }