Better migration handling

scnserver/db/schema/primary_migration_4_5.sql

@@ -0,0 +1,40 @@
+
+ALTER TABLE clients ADD COLUMN "name" TEXT NULL;
+
+DROP INDEX "idx_clients_userid";
+DROP INDEX "idx_clients_fcmtoken";
+
+CREATE TABLE clients_new
+(
+    client_id          TEXT                                                                    NOT NULL,
+
+    user_id            TEXT                                                                    NOT NULL,
+    type               TEXT       CHECK(type IN ('ANDROID','IOS','LINUX','MACOS','WINDOWS'))   NOT NULL,
+    fcm_token          TEXT                                                                    NOT NULL,
+    name               TEXT                                                                        NULL,
+
+    timestamp_created  INTEGER                                                                 NOT NULL,
+
+    agent_model        TEXT                                                                    NOT NULL,
+    agent_version      TEXT                                                                    NOT NULL,
+
+    PRIMARY KEY (client_id)
+) STRICT;
+
+UPDATE clients SET agent_model   = 'UNKNOWN' WHERE agent_model IS NULL;
+UPDATE clients SET agent_version = 'UNKNOWN' WHERE agent_version IS NULL;
+
+INSERT INTO clients_new
+SELECT
+    client_id, user_id, type, fcm_token, name, timestamp_created, agent_model, agent_version
+FROM clients;
+
+
+DROP TABLE clients;
+ALTER TABLE clients_new RENAME TO clients;
+
+
+CREATE        INDEX "idx_clients_userid"   ON clients (user_id);
+CREATE UNIQUE INDEX "idx_clients_fcmtoken" ON clients (fcm_token);
+
+