Rough draft of a db upgrade

scripts/unpickle.py

@@ -0,0 +1,41 @@
+import os
+os.environ["GRAMPS_RESOURCES"] = "/home/dsblank/gramps/gramps"
+
+from gramps.gen.db.utils import open_database
+import pickle
+import json
+
+db = open_database("Example")
+
+###########################################################################
+try:
+    db.dbapi.execute("ALTER TABLE family ADD COLUMN unblob TEXT;")
+    db.dbapi.commit()
+except Exception:
+    pass
+
+db.dbapi.execute("SELECT handle from family;")
+handles = [x[0] for x in db.dbapi.fetchall()]
+
+for handle in handles:
+    db.dbapi.execute("SELECT blob_data FROM family WHERE handle = ? limit 1;", [handle])
+    row = db.dbapi.fetchone()
+    unblob = json.dumps(pickle.loads(row[0]))
+    db.dbapi.execute("UPDATE family SET unblob = ? where handle = ?;", [unblob, handle])
+db.dbapi.commit()
+###########################################################################
+try:
+    db.dbapi.execute("ALTER TABLE person ADD COLUMN unblob TEXT;")
+except Exception:
+    pass
+
+db.dbapi.execute("SELECT handle from person;")
+handles = [x[0] for x in db.dbapi.fetchall()]
+
+for handle in handles:
+    db.dbapi.execute("SELECT blob_data FROM person WHERE handle = ? limit 1;", [handle])
+    row = db.dbapi.fetchone()
+    unblob = json.dumps(pickle.loads(row[0]))
+    db.dbapi.execute("UPDATE person SET unblob = ? where handle = ?;", [unblob, handle])
+db.dbapi.commit()
+db.close()