Question

I am new to ColdFusion, I have written a block of Postgres code in CFQuery :

<cffunction name="insertToReport" access="private" returntype="struct" output="false" >

  <cfset var xyz = structNew() >
  <cfset xyz.code = "">
      <cfquery name="querysampleresult" datasource="abc">
            DO            
            $BODY$
                DECLARE resultValue int;
            BEGIN
               resultValue = 1;
               SELECT resultValue INTO resultValue ;    
            END;
            $BODY$
      </cfquery>

            <cfset xyz.code = querysampleresult.resultValue  >

           <cfreturn xyz >
</cffunction>

My problem is that I am unable to access the variable resultValue outside of the CFQuery tag, i.e it is throwing the exception:

Element RESULTVALUE is undefined in querysampleresult

This is occurring at the CFSet statement at the end of function here:

<cfset xyz.code = querysampleresult.resultValue  >

I don’t know how I can set the variable resultValue in the structure and I am bound to return a structure from here to the calling environment.
Please help me in this, Thanks In Advance.

Answer 1

An anonymous code block (DO) always returns void. You need to use a function to return anything else:

create function f()
returns integer as $body$
declare 
    resultValue integer;
begin
    resultValue := 1;
    return resultValue;
end;
$body$
language plpgsql

After the function is created you can use it in your query:

select f() as resultValue;