Postgres存储过程在解析JSONB对象时出现错误。

Question

我试图在Postgres中运行以下存储过程。

...
FOR showing IN SELECT * FROM json_to_recordset(to_json(event_times)) AS show(id INTEGER, 
    times JSONB, startDate DATE, endDate DATE) LOOP
  IF showing.id > 0 THEN
    UPDATE
      event_shows
    SET
      start_date = showing.startDate, end_date = showing.endDate, times = showing.times
    WHERE
      event_id = eid AND
      id = showing.id;
  ELSE
    INSERT INTO
      event_shows (event_id, start_date, end_date, times)
    VALUES
      (eid, showing.startDate, showing.endDate, showing.times);
  END IF;
END LOOP;

以下的值 event_times 是 [{"times":[{"end":"13:00","start":"12:00"}],"endDate":"2020-05-19T19:45:47.121Z","startDate":"2020-05-19T19:45:47.121Z"},{"startDate":"2020-05-20T19:55:15.000Z","endDate":"2020-05-20T19:55:15.000Z","times":[{"start":"12:00","end":"13:00"}]}].

当我运行这段代码时，它的错误在。

"SQL statement \"INSERT INTO\n          event_shows (event_id, start_date, end_date, times)\n        VALUES\n          (eid, showing.startDate, showing.endDate, showing.times)\"

消息是： null value in column \"start_date\" violates not-null constraint. 好像我的JSONB对象没有被正确解析。

我到底做错了什么？

表 event_shows 被定义为。

CREATE TABLE event_shows (
  id SERIAL,
  event_id SERIAL NOT NULL REFERENCES event(id),
  start_date DATE NOT NULL,
  end_date DATE NOT NULL,
  times JSONB,
  PRIMARY KEY (id)
);

正在运行 PostgreSQL 10.4 on x86_64-pc-linux-musl, compiled by gcc (Alpine 6.4.0) 6.4.0, 64-bit

Answer 1

基本上，Postgres中的列名是敏感的，所以每当我们使用一个camelcase的名字时，就像 startDate，应该用引号。Postgres版本并不太重要。