如何知道upsert查询中运行的内容

我会尝试给 cfquery 标记结果参数,并检查该结果是否具有插入ID:

编辑:使用的函数不会使 <cfif> .

<cfquery name="qryTemp" datasource="someDSN" result="local.results">
if not exists (select someID from tempTable where someID = 20)
insert into tempTable (someID, colA, colB) values (1,2,3)
else
update tempTable set
colA = 2, colB =3
where someID = 1
</query>

<cfif structKeyExists(local.results, 'GENERATEDKEY')>
Do your stuff here...
</cfif>

(检查 Documentation 看哪一个 GENERATEDKEY 最适合你的目的)

为了提供另一个选项,sql 2008+还支持 MERGE 对于“upserts”。添加output子句将提供对 $action 变量。顾名思义,它将指示实际执行的操作(“插入”或“更新”)。

<cfquery name="qryTemp" datasource="#someDSN#">
    MERGE INTO tempTable tmp
    USING ( VALUES ( 1, 2, 3 )) 
        AS data (someID, colA, colB) 
        ON data.someID = tmp.someID
    WHEN MATCHED THEN
        UPDATE SET tmp.ColA = data.ColA
            , tmp.ColB = data.ColB
    WHEN NOT MATCHED THEN
        INSERT (someID, colA, colB)
        VALUES (data.someID, data.colA, data.colB)
    OUTPUT inserted.someID AS ModifiedID
            , $action AS Action;
</cfquery>

<!--- Demo: Was an insert or update peformed? --->
<cfif qryTemp.Action eq "INSERT">
    ID inserted = <cfoutput>#qryTemp.ModifiedID#</cfoutput>
<cfelse>
    ID updated = <cfoutput>#qryTemp.ModifiedID#</cfoutput>
</cfif>

NB:尽管是开箱即用, concurrency is still an issue 无论哪种方法。