内联 WITH 查询 (公用表表达式)
已记录的来源状态与原始语言说明；缺少版本证据时明确标为未知。
来源快照记录 PostgreSQL 8.1–18 的变化节点；历史矩阵独立记录 7.4–18 的状态。两者均未记录 PostgreSQL 19 或 20 的支持状态，较新版本明确保留为未知。这些来源声明与运行测量相互独立。
性能
说明
既非递归也没有任何副作用（例如 INSERT/UPDATE/DELETE）的 WITH 查询可以内联执行，从而带来性能改进。可以通过使用 "NOT MATERIALIZED" 子句强制对查询执行此行为，例如：
WITH cte AS NOT MATERIALIZED (
SELECT * FROM a
)
SELECT * FROM cte
JOIN b ON b.id = cte.id;
更多信息请访问 https://www.postgresql.org/docs/12/queries-with.html
所选版本: PostgreSQL 18
支持
比较版本
原始文档链接
已记录旧标识: 321
完整来源事实与出处
yaml · center · 1dd22bf9a7f3ec325b894e2836fda535a25529f246a94dd41d6abbfe9997f7fd
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