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Our team is preparing a Contao update that will trigger the Install Tool's database update, and we need a rollback plan if the schema change fails midway. The Install Tool applies the SQL required to reach the code's expected version and records that version, but ships no reverse migration, so recovery is operational rather than a built-in undo. The two appr
Schema Update Rollback Safety for Drupal hook_update_N The goal is to guarantee that a schema change made inside a hook_update_N implementation can be automatically reverted if a subsequent update fails, leaving the database in its pre‑update state. Currently Drupal core runs updates sequentially but does not wrap DDL statements in a transaction that can be
Goal Upgrade a small Delphi application while keeping the database online and avoiding any service interruption. Constraints and Uncertainty FireDAC’s SchemaUpdate property can align the database schema with the in‑memory data model at runtime, but the operation is not fully transactional and may silently alter or drop objects if the model diverges from the
contao
delphi