Index: PostgreSqlPlatform.php
===================================================================
--- PostgreSqlPlatform.php	(revision 674)
+++ PostgreSqlPlatform.php	(revision 696)
@@ -340,7 +340,7 @@
     public function getAlterTableSQL(TableDiff $diff)
     {
         $sql = array();
-
+	//var_dump($diff);
         foreach ($diff->addedColumns as $column) {
             $query = 'ADD ' . $this->getColumnDeclarationSQL($column->getName(), $column->toArray());
             $sql[] = 'ALTER TABLE ' . $diff->name . ' ' . $query;
@@ -370,10 +370,30 @@
                 $query = 'ALTER ' . $oldColumnName . ' ' . ($column->getNotNull() ? 'SET' : 'DROP') . ' NOT NULL';
                 $sql[] = 'ALTER TABLE ' . $diff->name . ' ' . $query;
             }
+	    if ($columnDiff->hasChanged('autoincrement')) {
+		//var_dump($columnDiff);
+		$createSeq = '';
+		$seqName = $diff->name . '_' . $oldColumnName . '_seq';
+		if ($column->getAutoincrement()) {
+			// create new seq
+			$createSeq = 'CREATE SEQUENCE ' . $seqName . '; ';
+			$sql[] = $createSeq;
+			$query = 'ALTER ' . $oldColumnName . ' ' . 'SET DEFAULT NEXTVAL (' . "'{$seqName}')"; 
+			$sql[] = 'ALTER TABLE ' . $diff->name . ' ' . $query;
+			$sql[] = 'SELECT SETVAL(' . "'{$seqName}'" . ', (SELECT MAX(' . $oldColumnName . ') FROM ' . $diff->name . '))';
+		} else {
+			// should be dropped? 
+			//$dropSeq = 'DROP SEQUENCE ' . $seqName . '; ';	
+			//$sql[] = $dropSeq;
+			$query = 'ALTER ' . $oldColumnName . ' ' . 'DROP DEFAULT'; 
+			$sql[] = 'ALTER TABLE ' . $diff->name . ' ' . $query;
+			$dropSeq = 'DROP SEQUENCE ' . $seqName . '; ';	
+			$sql[] = $dropSeq;
+		}
+		
+	    }
         }
-
-        foreach ($diff->renamedColumns as $oldColumnName => $column) {
-            $sql[] = 'ALTER TABLE ' . $diff->name . ' RENAME COLUMN ' . $oldColumnName . ' TO ' . $column->getName();
+foreach ($diff->renamedColumns as $oldColumnName => $column) { $sql[] = 'ALTER TABLE ' . $diff->name . ' RENAME COLUMN ' . $oldColumnName . ' TO ' . $column->getName();
         }
 
         if ($diff->newName !== false) {
@@ -381,7 +401,7 @@
         }
 
         $sql = array_merge($sql, $this->_getAlterTableIndexForeignKeySQL($diff));
-
+var_dump($sql);	
         return $sql;
     }