create column test

packages/tools/src/alterPlan.ts

@@ -158,6 +158,12 @@ export class AlterPlan {
       newName,
     });
   }
+
+  run(processor: AlterProcessor) {
+    for (const op of this.operations) {
+      runAlterOperation(op, processor);
+    }
+  }
 }
 
 export function runAlterOperation(op: AlterOperation, processor: AlterProcessor) {

packages/tools/src/diffTools.ts

@@ -281,4 +281,7 @@ export function getAlterTableScript(
   driver: EngineDriver
 ): string {
   const plan = createAlterTablePlan(oldTable, newTable, opts, db);
+  const dmp = driver.createDumper();
+  plan.run(dmp);
+  return dmp.s;
 }