knex/test/integration/migrate/drop-and-recreate/02_drop_and_recreate.js

exports.up = (knex) => {
  return knex.schema
    .table('old_users', function (table) {
      table.dropColumn('officeId');
    })
    .then(() => {
      return knex.schema.table('old_users', function (table) {
        table.string('officeId', 255);
      });
    });
};

exports.down = (knex) => {};