EmmyMiao87 commented on issue #5270: URL: https://github.com/apache/incubator-doris/issues/5270#issuecomment-764448529
> Great features。 > > There is another scenario. For example, when using bitmap to calculate UV, it is only cumulative at present. For example, if 100 people have paid the order, UV should be equal to 100. But if 10 people cancel the order, UV should be equal to 90. In this case, bitmap needs to support the reset operation of a bit. This kind of scenario can be considered later to design. The need for bitmap update does exist, but what you said may not be a simple syntax like update set bitmap=xxx where xxx. Is that true? bitmap 的更新需求确实是一个很重要的场景。不过你说的这类场景并不是 update 语句可以支持的。因为update支持的是列整体的更新，而不是列的数据的局部更新。 或者你知道有哪些其他的系统是支持这个功能的吗？我可以调研一下 ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
