feature #2: save executed migration in DB

src/main/resources/sql/migration/deleteHistory.sql

@@ -1,3 +1,3 @@
 DELETE
 FROM migration.history
-WHERE filename = :filename;
+WHERE filename = ?;

src/main/resources/sql/migration/findAllFunction.sql

@@ -1,2 +1,2 @@
-SELECT json_object_agg(filename, f)
+SELECT json_agg(f order by f.version)
 FROM migration.functions f;

src/main/resources/sql/migration/findAllHistory.sql

@@ -1,2 +1,2 @@
-SELECT json_object_agg(filename, f)
-FROM migration.functions f;
+SELECT json_agg(h order by h.version)
+FROM migration.history h;

src/main/resources/sql/migration/insertFunction.sql

@@ -1,2 +1,3 @@
-INSERT INTO migration.functions (filename, definition, up, down, version)
-VALUES (:filename, :definition, :up, :down, :version);
+INSERT INTO migration.functions as f (filename, definition, executed_at, up, down, version)
+VALUES (?, ?, now(), ?, ?, ?)
+RETURNING to_json(f);

src/main/resources/sql/migration/insertHistory.sql

@@ -1,2 +1,3 @@
-INSERT INTO migration.history (filename, up, down, version)
-VALUES (:filename, :up, :down, :version);
+INSERT INTO migration.history as h (filename, executed_at, up, down, version)
+VALUES (?, now(), ?, ?, nextval('migration.version_seq'))
+RETURNING to_json(h);