added typeaheead and introspetion

2026-10-18 17:24:28 +01:00
parent 8e5515afc0
commit d1cd3c2004
3 changed files with 106 additions and 2 deletions
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+# Phase 67 — Safe missing-row synchronisation preview
+
+From **Compare Table Data…**, choose source, target, and a shared base table, then select **Preview Missing-Row Sync…**.
+
+The generated `INSERT INTO ... SELECT ... WHERE NOT EXISTS` statement only proposes insertion of rows whose primary key is absent in the target. It does not update differing records or delete target records. DBSyn does not execute the preview: the user must explicitly copy and review it.
+
+## Safeguards and limitations
+
+- Requires matching introspected column names, order, types, nullability, and primary key columns on both sides.
+- SQL identifiers are backtick-escaped. Works only on the same MySQL server/connection.
+- SQL may still fail due to foreign keys, triggers, generated columns, permissions, incompatible constraints, or concurrent writes. Inspect and adapt SQL before execution.
+- The existing Phase 66 comparison remains limited to unordered 500-row samples and **must not** be treated as a complete diff.
+- No automated conflict resolution, deletion, or update is implemented.
+- Refresh introspection immediately before generating a preview; take a backup before applying any SQL.