I want to create custom component with attribute \"title\" that can have expression but I get this error:
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我们都知道在PostgreSQL中使用索引扫描时，是通过索引中存储的ctid去表中得到数据的。同时在PostgreSQL中如果要查询的列都在索引中，我们还可以使用index only scan。
加载中,请稍侯......