diff --git a/lib/Doctrine/DataDict/Firebird.php b/lib/Doctrine/DataDict/Firebird.php
index c79ba34b0..7200904b9 100644
--- a/lib/Doctrine/DataDict/Firebird.php
+++ b/lib/Doctrine/DataDict/Firebird.php
@@ -100,16 +100,16 @@ class Doctrine_DataDict_Firebird extends Doctrine_DataDict
      */
     public function getPortableDeclaration($field)
     {
-        $length = $field['length'];
-
-        if ((int) $length <= 0)
-            $length = null;
+        $length  = (isset($field['length']) && $field['length'] > 0) ? $field['length'] : null;
 
         $type = array();
         $unsigned = $fixed = null;
         $dbType = strtolower($field['type']);
         $field['field_sub_type'] = !empty($field['field_sub_type'])
             ? strtolower($field['field_sub_type']) : null;
+        
+        if( ! isset($field['name']))
+            $field['name'] = '';
 
         switch ($dbType) {
             case 'smallint':
@@ -134,7 +134,7 @@ class Doctrine_DataDict_Firebird extends Doctrine_DataDict
                 $fixed = false;
             case 'char':
             case 'cstring':
-                $type[] = 'text';
+                $type[] = 'string';
                 if ($length == '1') {
                     $type[] = 'boolean';
                     if (preg_match('/^(is|has)/', $field['name'])) {
diff --git a/lib/Doctrine/DataDict/Mssql.php b/lib/Doctrine/DataDict/Mssql.php
index 528c9dde7..e4720baef 100644
--- a/lib/Doctrine/DataDict/Mssql.php
+++ b/lib/Doctrine/DataDict/Mssql.php
@@ -116,19 +116,24 @@ class Doctrine_DataDict_Mssql extends Doctrine_DataDict
     public function getPortableDeclaration($field)
     {
         $db_type = preg_replace('/\d/','', strtolower($field['type']) );
-        $length = $field['length'];
-        if ((int)$length <= 0) {
-            $length = null;
-        }
+        $length  = (isset($field['length']) && $field['length'] > 0) ? $field['length'] : null;
+
         $type = array();
         // todo: unsigned handling seems to be missing
         $unsigned = $fixed = null;
+        
+        if( ! isset($field['name']))
+            $field['name'] = '';
+
         switch ($db_type) {
             case 'bit':
                 $type[0] = 'boolean';
             break;
             case 'int':
                 $type[0] = 'integer';
+                if($length == 1) {
+                    $type[] = 'boolean';
+                }
             break;
             case 'datetime':
                 $type[0] = 'timestamp';
@@ -146,7 +151,7 @@ class Doctrine_DataDict_Mssql extends Doctrine_DataDict
             case 'varchar':
                 $fixed = false;
             case 'char':
-                $type[0] = 'text';
+                $type[0] = 'string';
                 if ($length == '1') {
                     $type[] = 'boolean';
                     if (preg_match('/^[is|has]/', $field['name'])) {
@@ -168,6 +173,8 @@ class Doctrine_DataDict_Mssql extends Doctrine_DataDict
                 throw new Doctrine_DataDict_Mssql_Exception('unknown database attribute type: '.$db_type);
         }
 
+
+
         return array($type, $length, $unsigned, $fixed);
     }
 }
diff --git a/lib/Doctrine/DataDict/Mysql.php b/lib/Doctrine/DataDict/Mysql.php
index 89c88796a..4f067a70a 100644
--- a/lib/Doctrine/DataDict/Mysql.php
+++ b/lib/Doctrine/DataDict/Mysql.php
@@ -226,7 +226,7 @@ class Doctrine_DataDict_Mysql extends Doctrine_DataDict
         if ($dbType == 'national') {
             $dbType = strtok('(), ');
         }
-        if (!empty($field['length'])) {
+        if (isset($field['length'])) {
             $length = $field['length'];
             $decimal = '';
         } else {
@@ -235,6 +235,10 @@ class Doctrine_DataDict_Mysql extends Doctrine_DataDict
         }
         $type = array();
         $unsigned = $fixed = null;
+        
+        if( ! isset($field['name']))
+            $field['name'] = '';
+
         switch ($dbType) {
             case 'tinyint':
                 $type[] = 'integer';
@@ -275,7 +279,7 @@ class Doctrine_DataDict_Mysql extends Doctrine_DataDict
                 $fixed = false;
             case 'string':
             case 'char':
-                $type[] = 'text';
+                $type[] = 'string';
                 if ($length == '1') {
                     $type[] = 'boolean';
                     if (preg_match('/^(is|has)/', $field['name'])) {
@@ -354,6 +358,9 @@ class Doctrine_DataDict_Mysql extends Doctrine_DataDict
                 throw new Doctrine_DataDict_Mysql_Exception('unknown database attribute type: '.$dbType);
         }
 
+        $length = ((int) $length == 0) ? null : (int) $length;
+
+
         return array($type, $length, $unsigned, $fixed);
     }
     /**
diff --git a/lib/Doctrine/DataDict/Oracle.php b/lib/Doctrine/DataDict/Oracle.php
index 979089ce7..fa18ba297 100644
--- a/lib/Doctrine/DataDict/Oracle.php
+++ b/lib/Doctrine/DataDict/Oracle.php
@@ -103,6 +103,10 @@ class Doctrine_DataDict_Oracle extends Doctrine_DataDict
         if (!empty($field['length'])) {
             $length = $field['length'];
         }
+
+        if( ! isset($field['name']))
+            $field['name'] = '';
+
         switch ($db_type) {
             case 'integer':
             case 'pls_integer':
@@ -121,7 +125,7 @@ class Doctrine_DataDict_Oracle extends Doctrine_DataDict
                 $fixed = false;
             case 'char':
             case 'nchar':
-                $type[] = 'text';
+                $type[] = 'string';
                 if ($length == '1') {
                     $type[] = 'boolean';
                     if (preg_match('/^(is|has)/', $field['name'])) {
@@ -154,7 +158,7 @@ class Doctrine_DataDict_Oracle extends Doctrine_DataDict
                 }
                 break;
             case 'long':
-                $type[] = 'text';
+                $type[] = 'string';
             case 'clob':
             case 'nclob':
                 $type[] = 'clob';
diff --git a/lib/Doctrine/DataDict/Pgsql.php b/lib/Doctrine/DataDict/Pgsql.php
index 0a0172ef2..67ec1d801 100644
--- a/lib/Doctrine/DataDict/Pgsql.php
+++ b/lib/Doctrine/DataDict/Pgsql.php
@@ -425,7 +425,7 @@ class Doctrine_DataDict_Pgsql extends Doctrine_DataDict
     public function getPortableDeclaration(array $field)
     {
 
-        $length = $field['length'];
+        $length = (isset($field['length'])) ? $field['length'] : null;
         if ($length == '-1' && isset($field['atttypmod'])) {
             $length = $field['atttypmod'] - 4;
         }
@@ -434,7 +434,13 @@ class Doctrine_DataDict_Pgsql extends Doctrine_DataDict
         }
         $type = array();
         $unsigned = $fixed = null;
-        switch (strtolower($field['type'])) {
+
+        if( ! isset($field['name']))
+            $field['name'] = '';
+
+        $db_type = strtolower($field['type']);
+
+        switch ($db_type) {
             case 'smallint':
             case 'int2':
                 $type[] = 'integer';
@@ -475,7 +481,7 @@ class Doctrine_DataDict_Pgsql extends Doctrine_DataDict
             case 'unknown':
             case 'char':
             case 'bpchar':
-                $type[] = 'text';
+                $type[] = 'string';
                 if ($length == '1') {
                     $type[] = 'boolean';
                     if (preg_match('/^(is|has)/', $field['name'])) {
diff --git a/lib/Doctrine/DataDict/Sqlite.php b/lib/Doctrine/DataDict/Sqlite.php
index 072f5e9ff..d58898a44 100644
--- a/lib/Doctrine/DataDict/Sqlite.php
+++ b/lib/Doctrine/DataDict/Sqlite.php
@@ -123,10 +123,14 @@ class Doctrine_DataDict_Sqlite extends Doctrine_DataDict
     public function getPortableDeclaration(array $field)
     {
         $dbType = strtolower($field['type']);
-        $length = ( ! empty($field['length'])) ? $field['length'] : null;
-        $unsigned = ( ! empty($field['unsigned'])) ? $field['unsigned'] : null;
+        $length = (isset($field['length'])) ? $field['length'] : null;
+        $unsigned = (isset($field['unsigned'])) ? $field['unsigned'] : null;
         $fixed = null;
         $type = array();
+        
+        if( ! isset($field['name']))
+            $field['name'] = '';
+
         switch ($dbType) {
             case 'boolean':
                 $type[] = 'boolean';