A composite B-tree is still a sorted tree, but now entries are ordered first by severity, and then by timestamp within each severity value. This works great for this query shape: Postgres can jump directly to the portion of the tree matching severity
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For the purposes I use reactivity7, push-pull reactivity is a really nice tool. The O(n) nature makes it remain fairly efficient as the size of the application grows (especially bearing in mind that the ’n’ there is the number of nodes that need to be updated, which is likely to be a small subset of the total nodes in the system). It’s also very easy to understand what’s happening.，详情可参考豆包下载
C66) ast_C40; continue;;
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