MySQL: Dashboard.data column type changed to mediumtext (sql migration added), Fixes #1863

pkg/services/sqlstore/migrations/dashboard_mig.go

@@ -86,4 +86,10 @@ func addDashboardMigration(mg *Migrator) {
 	}))
 
 	mg.AddMigration("drop table dashboard_v1", NewDropTableMigration("dashboard_v1"))
+
+	// change column type of dashboard.data
+	mg.AddMigration("alter dashboard.data to mediumtext v1", new(RawSqlMigration).
+		Sqlite("SELECT 0 WHERE 0;").
+		Postgres("SELECT 0;").
+		Mysql("ALTER TABLE dashboard MODIFY data MEDIUMTEXT;"))
 }

pkg/services/sqlstore/migrations/dashboard_snapshot_mig.go

@@ -48,4 +48,10 @@ func addDashboardSnapshotMigrations(mg *Migrator) {
 
 	mg.AddMigration("create dashboard_snapshot table v5 #2", NewAddTableMigration(snapshotV5))
 	addTableIndicesMigrations(mg, "v5", snapshotV5)
+
+	// ncrease data type
+	mg.AddMigration("alter dashboard_snapshot.data to mediumtext v1", new(RawSqlMigration).
+		Sqlite("SELECT 0 WHERE 0;").
+		Postgres("SELECT 0;").
+		Mysql("ALTER TABLE dashboard_snapshot.data MODIFY data MEDIUMTEXT;"))
 }