[DBAL-204] Add API to filter tables/sequenecs based on a regexp

lib/Doctrine/DBAL/Configuration.php

@@ -83,4 +83,31 @@ class Configuration
     {
         $this->_attributes['resultCacheImpl'] = $cacheImpl;
     }
+
+    /**
+     * Filter schema assets expression.
+     *
+     * Only include tables/sequences matching the filter expression regexp in
+     * schema instances generated for the active connection when calling
+     * {AbstractSchemaManager#createSchema()}.
+     *
+     * @param string $filterExpression
+     */
+    public function setFilterSchemaAssetsExpression($filterExpression)
+    {
+        $this->_attributes['filterSchemaAssetsExpression'] = $filterExpression;
+    }
+
+    /**
+     * Return filter schema assets expression.
+     *
+     * @return string|null
+     */
+    public function getFilterSchemaAssetsExpression()
+    {
+        if (isset($this->_attributes['filterSchemaAssetsExpression'])) {
+            return $this->_attributes['filterSchemaAssetsExpression'];
+        }
+        return null;
+    }
 }

lib/Doctrine/DBAL/Platforms/AbstractPlatform.php

@@ -2348,6 +2348,20 @@ abstract class AbstractPlatform
         return false;
     }
 
+    /**
+     * Can this platform emulate schemas?
+     *
+     * Platforms that either support or emulate schemas don't automatically
+     * filter a schema for the namespaced elements in {@link
+     * AbstractManager#createSchema}.
+     *
+     * @return bool
+     */
+    public function canEmulateSchemas()
+    {
+        return false;
+    }
+
     /**
      * Some databases don't allow to create and drop databases at all or only with certain tools.
      *

lib/Doctrine/DBAL/Platforms/SqlitePlatform.php

@@ -501,4 +501,18 @@ class SqlitePlatform extends AbstractPlatform
         $tableName = str_replace(".", "__", $tableName);
         return $tableName;
     }
+
+    /**
+     * Sqlite Platform emulates schema by underscoring each dot and generating tables
+     * into the default database.
+     *
+     * This hack is implemented to be able to use SQLite as testdriver when
+     * using schema supporting databases.
+     *
+     * @return bool
+     */
+    public function canEmulateSchemas()
+    {
+        return true;
+    }
 }

lib/Doctrine/DBAL/Schema/AbstractSchemaManager.php

@@ -129,7 +129,7 @@ abstract class AbstractSchemaManager
 
         $sequences = $this->_conn->fetchAll($sql);
 
-        return $this->_getPortableSequencesList($sequences);
+        return $this->filterAssetNames($this->_getPortableSequencesList($sequences));
     }
 
     /**
@@ -188,7 +188,6 @@ abstract class AbstractSchemaManager
         return count($tableNames) == count(\array_intersect($tableNames, array_map('strtolower', $this->listTableNames())));
     }
 
-
     /**
      * Return a list of all tables in the current database
      *
@@ -199,8 +198,34 @@ abstract class AbstractSchemaManager
         $sql = $this->_platform->getListTablesSQL();
 
         $tables = $this->_conn->fetchAll($sql);
+        $tableNames = $this->_getPortableTablesList($tables);
+        return $this->filterAssetNames($tableNames);
+    }
+
+    /**
+     * Filter asset names if they are configured to return only a subset of all
+     * the found elements.
+     *
+     * @param array $assetNames
+     * @return array
+     */
+    protected function filterAssetNames($assetNames)
+    {
+        $filterExpr = $this->getFilterSchemaAssetsExpression();
+        if (!$filterExpr) {
+            return $assetNames;
+        }
+        return array_values (
+            array_filter($assetNames, function ($assetName) use ($filterExpr) {
+                $assetName = ($assetName instanceof AbstractAsset) ? $assetName->getName() : $assetName;
+                return preg_match('(' . $filterExpr . ')', $assetName);
+            })
+        );
+    }
 
-        return $this->_getPortableTablesList($tables);
+    protected function getFilterSchemaAssetsExpression()
+    {
+        return $this->_conn->getConfiguration()->getFilterSchemaAssetsExpression();
     }
 
     /**
@@ -804,8 +829,7 @@ abstract class AbstractSchemaManager
         }
         $tables = $this->listTables();
 
-        $schema = new Schema($tables, $sequences, $this->createSchemaConfig());
-        return $schema;
+        return new Schema($tables, $sequences, $this->createSchemaConfig());
     }
 
     /**
@@ -826,6 +850,18 @@ abstract class AbstractSchemaManager
         return $schemaConfig;
     }
 
+    /**
+     * The search path for namespaces in the currently connected database.
+     *
+     * The first entry is usually the default namespace in the Schema. All
+     * further namespaces contain tables/sequences which can also be addressed
+     * with a short, not full-qualified name.
+     *
+     * For databases that don't support subschema/namespaces this method
+     * returns the name of the currently connected database.
+     *
+     * @return array
+     */
     public function getSchemaSearchPaths()
     {
         return array($this->_conn->getDatabase());

tests/Doctrine/Tests/DBAL/Functional/Schema/PostgreSqlSchemaManagerTest.php

@@ -10,6 +10,11 @@ require_once __DIR__ . '/../../../TestInit.php';
 
 class PostgreSqlSchemaManagerTest extends SchemaManagerFunctionalTestCase
 {
+    public function tearDown()
+    {
+        parent::tearDown();
+        $this->_conn->getConfiguration()->setFilterSchemaAssetsExpression(null);
+    }
     /**
      * @group DBAL-177
      */
@@ -166,6 +171,27 @@ class PostgreSqlSchemaManagerTest extends SchemaManagerFunctionalTestCase
             $this->_conn->getDatabasePlatform()->getCreateTableSQL($table)
         );
     }
+
+    /**
+     * @group DBAL-204
+     */
+    public function testFilterSchemaExpression()
+    {
+        $testTable = new \Doctrine\DBAL\Schema\Table('dbal204_test_prefix');
+        $column = $testTable->addColumn('id', 'integer');
+        $this->_sm->createTable($testTable);
+        $testTable = new \Doctrine\DBAL\Schema\Table('dbal204_without_prefix');
+        $column = $testTable->addColumn('id', 'integer');
+        $this->_sm->createTable($testTable);
+
+        $this->_conn->getConfiguration()->setFilterSchemaAssetsExpression('^dbal204_');
+        $names = $this->_sm->listTableNames();
+        $this->assertEquals(2, count($names));
+
+        $this->_conn->getConfiguration()->setFilterSchemaAssetsExpression('^dbal204_test');
+        $names = $this->_sm->listTableNames();
+        $this->assertEquals(1, count($names));
+    }
 }
 
 class MoneyType extends Type