diff --git a/src/Schema/AbstractSchema.php b/src/Schema/AbstractSchema.php
index cd1c89cb0..9f9ebf8a4 100644
--- a/src/Schema/AbstractSchema.php
+++ b/src/Schema/AbstractSchema.php
@@ -126,6 +126,11 @@ abstract protected function loadTableUniques(string $tableName): array;
      */
     abstract protected function loadTableSchema(string $name): TableSchemaInterface|null;
 
+    public function defaultSchema(string $defaultSchema): void
+    {
+        $this->defaultSchema = $defaultSchema;
+    }
+
     public function getDefaultSchema(): string|null
     {
         return $this->defaultSchema;
diff --git a/src/Schema/SchemaInterface.php b/src/Schema/SchemaInterface.php
index 684a11f6e..c93085270 100644
--- a/src/Schema/SchemaInterface.php
+++ b/src/Schema/SchemaInterface.php
@@ -404,4 +404,11 @@ public function enableCache(bool $value): void;
      * @return array All view names in the database.
      */
     public function getViewNames(string $schema = '', bool $refresh = false): array;
+
+    /**
+     * Set the default schema of the database.
+     *
+     * @param string $defaultSchema The default schema name.
+     */
+    public function defaultSchema(string $defaultSchema): void;
 }
diff --git a/tests/Db/Schema/SchemaTest.php b/tests/Db/Schema/SchemaTest.php
index 7db253b30..4253ad6d5 100644
--- a/tests/Db/Schema/SchemaTest.php
+++ b/tests/Db/Schema/SchemaTest.php
@@ -434,6 +434,16 @@ public function testSetTableMetadata(): void
         $this->assertSame($checkConstraint, $schema->getTableChecks('T_constraints_1'));
     }
 
+    public function testDefaultSchema(): void
+    {
+        $db = $this->getConnection();
+
+        $schema = $db->getSchema();
+        $schema->defaultSchema('yii');
+
+        $this->assertSame('yii', $schema->getDefaultSchema());
+    }
+
     private function createTableSchemaStub(): TableSchemaInterface
     {
         // defined column C_id