Function applyDiff

applyDiff(knex: Knex, diff: MigrationDiff, tableName: string): Promise<void>
Execute a MigrationDiff directly against a live database without writing a migration file. Intended for db push (dev-only schema sync).

Foreign-key constraint drops are executed as raw ALTER TABLE … DROP CONSTRAINT statements before the main alterTable call.
Parameters
- knex: Knex
  A configured Knex instance or transaction.
- diff: MigrationDiff
  The diff from diffSchema.
- tableName: string
  The table to alter.
Returns Promise<void>
Example
```
const dbState = await introspectDatabase(knex, 'users');
const diff = diffSchema(UserSchema, dbState);
if (!isDiffEmpty(diff)) await applyDiff(knex, diff, 'users');
```
- Defined in knex-schema/src/migration.ts:630