Increase database schema version

The removal of the `NOT NULL` constraint on `customvar_flat`.`flat_value` makes
the schema upgrade a hard requirement for 1.1.1.

pkg/icingadb/db.go

@@ -85,8 +85,8 @@ func NewDb(db *sqlx.DB, logger *logging.Logger, options *Options) *DB {
 }
 
 const (
-	expectedMysqlSchemaVersion    = 3
-	expectedPostgresSchemaVersion = 1
+	expectedMysqlSchemaVersion    = 4
+	expectedPostgresSchemaVersion = 2
 )
 
 // CheckSchema asserts the database schema of the expected version being present.

schema/mysql/schema.sql

@@ -1343,4 +1343,4 @@ CREATE TABLE icingadb_schema (
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin ROW_FORMAT=DYNAMIC;
 
 INSERT INTO icingadb_schema (version, timestamp)
-  VALUES (3, CURRENT_TIMESTAMP() * 1000);
+  VALUES (4, CURRENT_TIMESTAMP() * 1000);

schema/mysql/upgrades/1.1.1.sql

@@ -32,3 +32,6 @@ ALTER TABLE history
     DROP COLUMN event_type,
     CHANGE COLUMN event_type_new event_type enum('state_change', 'ack_clear', 'downtime_end', 'flapping_end', 'comment_remove', 'comment_add', 'flapping_start', 'downtime_start', 'ack_set', 'notification') NOT NULL;
 UNLOCK TABLES;
+
+INSERT INTO icingadb_schema (version, timestamp)
+  VALUES (4, CURRENT_TIMESTAMP() * 1000);

schema/pgsql/schema.sql

@@ -2181,4 +2181,4 @@ CREATE TABLE icingadb_schema (
 ALTER SEQUENCE icingadb_schema_id_seq OWNED BY icingadb_schema.id;
 
 INSERT INTO icingadb_schema (version, timestamp)
-  VALUES (1, extract(epoch from now()) * 1000);
+  VALUES (2, extract(epoch from now()) * 1000);

schema/pgsql/upgrades/1.1.1.sql

@@ -25,3 +25,6 @@ ALTER TABLE history
   ALTER COLUMN event_type TYPE history_type USING event_type::text::history_type,
   ALTER COLUMN event_type SET DEFAULT 'state_change'::history_type;
 DROP TYPE history_type_old;
+
+INSERT INTO icingadb_schema (version, timestamp)
+  VALUES (2, extract(epoch from now()) * 1000);