当文本变长时，MySQL REPLACE 功能不起作用答案

【问题标题】：MySQL REPLACE function not work when the text gets long当文本变长时，MySQL REPLACE 功能不起作用
【发布时间】：2020-04-05 11:16:57
【问题描述】：

我有一个表（实际上是由 WordPress 生成的）。我想使用REPLACE 函数替换一些文本，但它不起作用。

字段中的文本：

这个文本完全是从字段中复制的，我尝试这样做：

UPDATE wp_posts
  SET post_content =
  REPLACE(
    post_content,
    'the above text',
    'some new text'
  )
  WHERE ID = 1;

并且没有影响行，但是当我减少文本时，假设我只为<!-- wp:blocks/amazon-product {"url":"https://www.amazon.com/OutdoorMaster-OTG-Ski-Goggles-Protection/dp/B01HLV5HR6" 做，然后文本被替换。

【问题讨论】：

标签： mysql sql database wordpress

【解决方案1】：

如你所见

Set @a = 'a<!-- wp:blocks/amazon-product {"url":"https://www.amazon.com/OutdoorMaster-OTG-Ski-Goggles-Protection/dp/B01HLV5HR6","category":"1","headline":"OutdoorMaster OTG Ski Goggles - Over Glasses Ski/Snowboard Goggles for Men, Women \u0026 Youth - 100% UV Protection (Black Frame + VLT 10% Grey Lens with REVO Silver)","price":"$17.99","review":"",","checkPrice":"Buy Now on Amazon","isUrlPresent":true,"cacheDate":"2020-04-05T07:27:27.875Z"} /-->"a'

✓

SELECT REPLACE (@a,'<!-- wp:blocks/amazon-product {"url":"https://www.amazon.com/OutdoorMaster-OTG-Ski-Goggles-Protection/dp/B01HLV5HR6","category":"1","headline":"OutdoorMaster OTG Ski Goggles - Over Glasses Ski/Snowboard Goggles for Men, Women \u0026 Youth - 100% UV Protection (Black Frame + VLT 10% Grey Lens with REVO Silver)","price":"$17.99","review":"",","checkPrice":"Buy Now on Amazon","isUrlPresent":true,"cacheDate":"2020-04-05T07:27:27.875Z"} /-->','test')

|替换 (@a,'