Deprecated regex-based asset filters

UPGRADE.md

 # Upgrade to 2.9
 
+## Deprecated `Configuration::getFilterSchemaAssetsExpression()`, `::setFilterSchemaAssetsExpression()` and `AbstractSchemaManager::getFilterSchemaAssetsExpression()`.
+
+Regular expression-based filters are hard to extend by combining together. Instead, you may use callback-based filers via `::getSchemaAssetsFilter()` and `::getSchemaAssetsFilter()`. Callbacks can use regular expressions internally.
+
 ## Deprecated `Doctrine\DBAL\Types\Type::getDefaultLength()`
 
 This method was never used by DBAL internally. It is now deprecated and will be removed in DBAL 3.0.

lib/Doctrine/DBAL/Configuration.php

@@ -70,6 +70,8 @@ class Configuration
      * schema instances generated for the active connection when calling
      * {AbstractSchemaManager#createSchema()}.
      *
+     * @deprecated Use Configuration::setSchemaAssetsFilter() instead
+     *
      * @param string $filterExpression
      *
      * @return void
@@ -87,6 +89,8 @@ class Configuration
     /**
      * Returns filter schema assets expression.
      *
+     * @deprecated Use Configuration::getSchemaAssetsFilter() instead
+     *
      * @return string|null
      */
     public function getFilterSchemaAssetsExpression()

lib/Doctrine/DBAL/Schema/AbstractSchemaManager.php

@@ -228,6 +228,8 @@ abstract class AbstractSchemaManager
     }
 
     /**
+     * @deprecated Use Configuration::getSchemaAssetsFilter() instead
+     *
      * @return string|null
      */
     protected function getFilterSchemaAssetsExpression()