diff -r 925b15fb5c63 -r cbc7817a3346 src/Configuration.h
--- a/src/Configuration.h	Tue Jul 30 15:51:35 2019 +0200
+++ b/src/Configuration.h	Tue Jul 30 17:06:41 2019 +0200
@@ -53,6 +53,19 @@
 class Configuration {
 public:
 
+
+	/**
+	 * By default, this transformation runs in-memory.
+	 * If 'file' is not empty, this transformation will operate on an .sqlite file.
+	 * The file will be created if it does not exist.
+	 */
+	relpipe::writer::string_t file;
+
+	/**
+	 * If true, the file (if any was created) will not be deleted when this transformation finishes.
+	 */
+	relpipe::writer::boolean_t keepFile = false;
+
 	std::vector<Statement> statements;
 
 	virtual ~Configuration() {