CSV to postgresql using stored procedure -

I want to copy the CSV to the database using the stored function. My work is as follows:

  Build function gis_portal.copycsv (in the path text) as' Zero 'with copy GIS_port al.temp_excel along the way DELIMITER' LANGUAGE Sql volatile LEAKPROOF;   
 query  
  from the path with CPI gis_portal.temp_excel DELIMITER ',' CSV header   
 with .  
 While creating this function, giving error as a syntax error near the path.  
 Please help me.   
 
 
  'copy GIS_portallet. Way via temp_excelDELIMITER' ^^^^^^^^ ^^   
 What delimiter? If you use that keyword, then you have to specify one.  
 Try:  
  create gis_portal.copycsv (in path path) $$ as zero return from $ cgi gis_portal.temp_excel with path DELIMITER ' , '$$ LANGUAGE sql;   
 Or whatever you want.  
 In addition, you can not use the identifier in SQL Functions, you should use static parameters like $ 1. But because  copy  is not a static statement, you can not use the parameter in it. You must use PL / PGSQL and  EXECUTE  to run it as dynamic SQL:  
  create gis_portal.copycsv (IN path text) Empty return EXECUTE format as $$ BEGIN ('copy GIS_portal. Temp_excel FROM% LDELIMITER'',' '', path); End; $$ LANGUAGE plpgsql;   
 Note the double quotes around the delimiter as it is now a SQL string.