Custom report query error, used SqlQueryMarco with Multiproejcts - ComprehensiveSolution

[anonymous]

I used the trac 0.11 and postgresql to create multiproject environment. see ComprehensiveSolution I want to custom a query to run function under db. But when I Edit report as below

{{{
#!SQL
set search_path to public,public; 
SELECT declare_multitrac_query(); 

SELECT p.value AS __color__,
   project, id AS ticket, summary, component, version, milestone, t.type AS type, 
   owner, status,
   time AS created,
   changetime AS _changetime, description AS _description,
   reporter AS _reporter
  FROM multitrac_query('status <> ''closed''') t 
  LEFT JOIN enum p ON p.name = t.priority AND p.type = 'priority'
  ORDER BY CAST(p.value AS int), milestone, t.type, time;
}}}

Then it show the error message :

Report execution failed: syntax error at or near "{" LINE 1: SELECT COUNT(*) FROM ({{{ ^

when I run query without SqlQueryMarco, it show the error message :

Report execution failed: syntax error at or near "to" LINE 2: set search_path to public,public; ^

Could you please help me to check this problem ? Thank you very much.