{
  "name": "23_drop_check_constraint",
  "operations": [
    {
      "drop_constraint": {
        "table": "posts",
        "column": "title",
        "name": "title_length",
        "up": "title",
        "down": "(SELECT CASE WHEN length(title) <= 3 THEN LPAD(title, 4, '-') ELSE title END)"
      }
    }
  ]
}