Put the responsibility to give the default schema name from...

Put the responsibility to give the default schema name from CreateSchemaSqlCollector to the Platforms (abstract, sqlserver, postgresql)

lib/Doctrine/DBAL/Platforms/AbstractPlatform.php

@@ -2751,6 +2751,18 @@ abstract class AbstractPlatform
         return false;
     }
 
+    /**
+     * Returns the default schema name.
+     *
+     * @return string
+     *
+     * @throws \Doctrine\DBAL\DBALException If not supported on this platform.
+     */
+    protected function getDefaultSchemaName()
+    {
+        throw DBALException::notSupported(__METHOD__);
+    }
+
     /**
      * Whether this platform supports create database.
      *

lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php

@@ -164,6 +164,14 @@ class PostgreSqlPlatform extends AbstractPlatform
         return true;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getDefaultSchemaName()
+    {
+        return 'public';
+    }
+
     /**
      * {@inheritDoc}
      */

lib/Doctrine/DBAL/Platforms/SQLServerPlatform.php

@@ -131,6 +131,14 @@ class SQLServerPlatform extends AbstractPlatform
         return true;
     }
 
+    /**
+     * {@inheritdoc}
+     */
+    public function getDefaultSchemaName()
+    {
+        return 'dbo';
+    }
+
     /**
      * {@inheritDoc}
      */

lib/Doctrine/DBAL/Schema/Visitor/CreateSchemaSqlCollector.php

@@ -23,7 +23,6 @@ use Doctrine\DBAL\Platforms\AbstractPlatform;
 use Doctrine\DBAL\Schema\Table;
 use Doctrine\DBAL\Schema\ForeignKeyConstraint;
 use Doctrine\DBAL\Schema\Sequence;
-use Doctrine\DBAL\Platforms\SQLServerPlatform;
 
 class CreateSchemaSqlCollector extends AbstractVisitor
 {
@@ -108,12 +107,8 @@ class CreateSchemaSqlCollector extends AbstractVisitor
     {
         $namespace = $asset->getNamespaceName();
 
-        if ($namespace === null) {
-            if ($this->platform instanceof SQLServerPlatform) {
-                $namespace = 'dbo';
-            } else {
-                $namespace = 'default';
-            }
+        if ( !isset($namespace)) {
+            $namespace = $this->platform->getDefaultSchemaName();
         }
 
         if ( !isset($this->createTableQueries[$namespace])) {