变量未在 WITH 子句中定义

Question

在下面的查询中

MATCH (i:UT)-[c:Cedes]->(r:UT) 
WHERE i.RiIndex=0
WITH r, c, i, (CASE WHEN i.gross > c.xs THEN i.gross-c.xs ELSE 0 END) AS mn
RETURN r, sum(c.pp*(mn)) AS  ceded

执行得很好但是

MATCH (i:UT)-[c:Cedes]->(r:UT) 
WHERE i.RiIndex=0
WITH r, c, i, (CASE WHEN i.gross > c.xs THEN i.gross-c.xs ELSE 0 END) AS mn, (CASE WHEN c.lim < mn THEN c.lim ELSE mn END) AS mx
RETURN r, sum(c.pp*(mx)) AS  ceded

报如下错误

Variable `mn` not defined (line 3, column 97 (offset: 146))
"WITH r, c, i, (CASE WHEN i.gross > c.xs THEN i.gross-c.xs ELSE 0 END) AS mn, (CASE WHEN c.lim < mn THEN c.lim ELSE mn END) AS mx"
                                                                                                 ^

有人可以建议是否有办法将 'mn' 变量传递给创建 'mx' 变量的函数吗？

Answer 1

在您的 WITH 子句中，mn 在 WITH 子句完成之前不在范围内。之后你需要另一个 WITH 将它包含在范围内：

MATCH (i:UT)-[c:Cedes]->(r:UT) 
WHERE i.RiIndex=0
WITH r, c, i, (CASE WHEN i.gross > c.xs THEN i.gross-c.xs ELSE 0 END) AS mn
WITH r, c, i, (CASE WHEN c.lim < mn THEN c.lim ELSE mn END) AS mx
RETURN r, sum(c.pp*(mx)) AS  ceded

变量未在 WITH 子句中定义

Variable not defined in WITH clause

variables

undefined

with-statement

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