小编hin*_*awa的帖子

问题实际上是关于 sql 查询的优化。假设我们有这样定义的表。

CREATE TYPE record_type AS ENUM (
  'TRANSFER',
  'TRADE',
  'VOUCHER'
);

CREATE TYPE record_status AS ENUM (
  'NEW',
  'VALIDATED',
  'EXPIRED'
);

CREATE TABLE good_records (
  id uuid PRIMARY KEY,
  user_id uuid NOT NULL,
  type record_type NOT NULL,
  status record_status NOT NULL,
  amount numeric(36,18) NOT NULL DEFAULT 0,
  expired_at timestamp WITH TIME ZONE NOT NULL,
  notification_sent boolean DEFAULT false,
);

我想每 10 分钟运行一次过期检查，即我会运行SELECT * FROM good_records where record_status = 'NEW' and notification_sent = false（和SELECT * FROM …

我已经搜索了该网站，但没有找到我关于子字符串替换的特定问题的合适答案。我知道如何通过替换子字符串/正则表达式clojure.string/replace但不确定在这种情况下使用它。

让我们说。我首先有一些字符串：

(def test-str "I am a test string. :name to replace, :age to replace. And there are strange symbols in this string. And here are the keyword shall not modify, such as :not-interested.")
(def another-test-str ":nothing :to :replace")

我有一个翻译表：

(def translation-table {:name "Alice"
                :age  19})

我想，以取代:name在test-str与“爱丽丝”，:age与19，但不希望更换:not-interested。表很长，不同的字符串（要替换）包含不同的关键字。

鉴于翻译表，那么进行子串替换的可能系统方法是什么？即，我想要一个函数replace-with-translation：

(replace-with-translation test-str translation-table)
=> "I am a test string. Alice to replace, 19 to replace. And there are strange symbols …