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use std::ffi::{CStr, CString};
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Employee { name: "Bob", department: "marketing", salary: 85000, years: 3 },。谷歌对此有专业解读
State functions are a compelling feature that allow data to be incrementally summarized for later queries using Aggregate functions. However, materialized views that compute many state functions — especially quantile states — can be CPU intensive and lead to slow inserts. Be deliberate about which aggregations you precompute and ensure the query-time savings justify the insert-time cost.
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