Question

Inside a cffunction I have a query that I want to long cache by setting the cachedwitin to a big value. However, I also want to clear that cache under a few circumstances.

I’ve done this in a number of places, but in one of them the cache is never updated and I always get the original value if I ask it to give me the cached value.

The cfquery documentation states:

To use cached data, the current query must use the same SQL statement, data source, query name, user name, and password.

This is the case with the query, since it’s a single sql statement with no non-sql except the cfqueryparam; datasource and query name don’t change and username and password are not specified.

The relevant code is:

<!--- Long cache the query since the values rarely change, but allow the cache to be cleared. --->
<cfif Arguments.ClearCache EQ false>
    <cfset local.CachedWithin = CreateTimeSpan(7,0,0,0)>
<cfelse>
    <cfset local.CachedWithin = CreateTimeSpan(0,0,0,-1)>
</cfif>

<cfquery name="local.qryName" datasource="#Variables.DSN#" cachedwithin="#local.CachedWithin#">
    SELECT
        [User].[Name]
    FROM
        [User]
    WHERE
        [User].[UserID] = <cfqueryparam value="#Arguments.UserID#" cfsqltype="cf_sql_integer">
</cfquery>

Why does this work in other places, but not here?

Answer 1

There is an additional “sameness” requirement for cached queries that isn’t mentioned in the documentation. That note should end with:

… password, and underlying data types of any cfqueryparam values.

Change your code so that the Arguments.UserID is forced to a data type. In your case this can be accomplished by putting the following code before the cfquery:

<!--- Make sure data types used in query are consistent --->
<cfset local.UserID = Int(Arguments.UserID)>

and change the cfqueryparam value to value="#local.UserID#".

I’ve phrased the above as an omission in the documentation, but I suspect it’s a bug in CF9 instead.