过滤存储过程结果 (Informix)

Question

IBM Informix 动态服务器版本 11.50.UC5XA。

我有一个 Informix 数据库。该数据库包含一个名为“sp_agent_details”的存储过程，它获取两个日期时间参数。该存储过程产生大约 27 列，我只需要其中的几列用于报告。我尝试这个语法：

select AGENT_NAME, AGENT_LOGIN_ID from 
       TABLE(sp_agent_detail('2014-02-04 04:00:00', '2014-02-04 23:00:00'))

结果出现这样的错误：

java.sql.SQLException: Illegal SQL statement in SPL routine.

接下来我尝试这个语法：

select AGENT_NAME, AGENT_LOGIN_ID from 
       TABLE(MULTISET{sp_agent_call_summary 
    ('2014-02-04 04:00:00', '2014-02-04 23:00:00')})

结果：

 java.sql.SQLException: Function (informix.sp_agent_call_summary) 
returns too many values.

然后我尝试了这个：

select AGENT_NAME, AGENT_LOGIN_ID from 
   TABLE(sp_agent_detail('2014-02-04 04:00:00', '2014-02-04 23:00:00'))
   (AGENT_NAME, AGENT_LOGIN_ID, other columns that are returned by SP)

结果：

java.sql.SQLException: Illegal SQL statement in SPL routine.

Answer 1

这是如何工作的说明。
这是在 Informix 11.50 FC9 上使用 dbaccess 执行的。您可以命名返回参数，但它们仅在自己将过程作为过程执行时才有效...而不是在 select 语句中执行。您需要手动命名每一列...请检查下面。

IBM Informix 11.50 手册中的参考资料：

• 从语法中选择...
• 过程命名返回参数

create procedure dummy ( param integer )
returning int as id , char(10) as name, date as created
define vid int;;
define vname char(10);;
define vcreate date;;

foreach c1 for 
  select first 10 tabid, tabname, created 
     into vid, vname, vcreate 
     from systables where tabid >= param

  return vid , vname, vcreate with resume ;;
end foreach ;;

end procedure
;
Routine created.

;

execute procedure dummy(10);

         id name       created

         10 syssyntabl 20/02/2014
         11 sysconstra 20/02/2014
         12 sysreferen 20/02/2014
         13 syschecks  20/02/2014
         14 sysdefault 20/02/2014
         15 syscoldepe 20/02/2014
         16 sysprocedu 20/02/2014
         17 sysprocbod 20/02/2014
         18 sysprocpla 20/02/2014
         19 sysprocaut 20/02/2014

10 row(s) retrieved.


select  * from table(dummy(10));

unnamed_col_1 unnamed_col_2 unnamed_col_3

           10 syssyntabl    20/02/2014
           11 sysconstra    20/02/2014
           12 sysreferen    20/02/2014
           13 syschecks     20/02/2014
           14 sysdefault    20/02/2014
           15 syscoldepe    20/02/2014
           16 sysprocedu    20/02/2014
           17 sysprocbod    20/02/2014
           18 sysprocpla    20/02/2014
           19 sysprocaut    20/02/2014

10 row(s) retrieved.


select  * from table(dummy(10)) as x(id,name,created);

         id name       created

         10 syssyntabl 20/02/2014
         11 sysconstra 20/02/2014
         12 sysreferen 20/02/2014
         13 syschecks  20/02/2014
         14 sysdefault 20/02/2014
         15 syscoldepe 20/02/2014
         16 sysprocedu 20/02/2014
         17 sysprocbod 20/02/2014
         18 sysprocpla 20/02/2014
         19 sysprocaut 20/02/2014

10 row(s) retrieved.


select  x.id,name from table(dummy(10)) x(id,name,created);

         id name

         10 syssyntabl
         11 sysconstra
         12 sysreferen
         13 syschecks
         14 sysdefault
         15 syscoldepe
         16 sysprocedu
         17 sysprocbod
         18 sysprocpla
         19 sysprocaut

10 row(s) retrieved.



Database closed.