具有 CTE 和 return 多个表的 Postgres

Question

我想使用 CTE 来格式化复杂查询和 return 多个表。

以下代码：

CREATE OR REPLACE FUNCTION "public"."postgres_return_mutiple_table"(refcursor,refcursor)
RETURNS SETOF "pg_catalog"."refcursor" AS $BODY$
declare return_agents alias for ;
return_agentpayrate alias for ;
BEGIN
        with t_agents as (
                    select * from agents join .... where .. /*maybe complex query*/
        ),
        t_agentpayrate as (
                select * from t_agents join .... where .. /*maybe complex query*/
        )
        OPEN return_agents FOR select * from t_agents
        RETURN NEXT return_agents;
        OPEN return_agentpayrate FOR
                     select * from t_agentpayrate RETURN 
                NEXT t_agentpayrate;
END;
$BODY$
  LANGUAGE plpgsql VOLATILE
  COST 100

当我运行这个函数时，它报错：

ERROR:  syntax error at or near "OPEN"
LINE 12:   OPEN return_agents FOR select * from t_agents; 
           ^
, Time: 0.001000s

Answer 1

CREATE OR REPLACE FUNCTION public.fn_get_available_enterprise(
"shortname" varchar,
"filter" varchar, 
"recordpage" int4, 
"pageindex" int4,
refcursor,
refcursor
) returns setof refcursor
as
$$
declare avail_entp  alias for ;
        avail_entp_count alias for ;
begin
   open avail_entp for 
         WITH available_enterprise AS (
                 SELECT distinct entinfo,ent.entname,ent.entabbr FROM get_agent_nocontian_entpaymenttype(shortname,filter,recordpage,pageindex) 
                 JOIN wxbsenterprise ent  on ent.entname = output_entname
                 where (("filter"!='' and (ent.entname like "filter" or entinfo like "filter" or entabbr like "filter"))
                 or ("filter"='' and 1=1))
                 limit recordpage offset (pageindex-1)*recordpage    
          ),
          enterpriserate_link_agent as(
                 select * from agententerprises 
                 where entname=@entname and level=1 
                 and (validate = true or (validate = false and enddate is not null and enddate >= current_date))
          )
          select * from available_enterprise;
   return next avail_entp;
   open avail_entp_count for 
                         WITH available_enterprise_count as (
                                         SELECT distinct entinfo,ent.entname,entabbr FROM get_agent_nocontian_entpaymenttype(shortname,filter,recordpage,pageindex) as epna 
                                                                JOIN wxbsenterprise ent  on ent.entname = output_entname
                         )
                        select count(*) from available_enterprise_count; 
   return next avail_entp_count;
end;
$$ language plpgsql;

具有 CTE 和 return 多个表的 Postgres

Postgres with CTE and return multiple tables

postgresql

plpgsql