如何将这个复杂的查询转换为活动记录CODEIGNITER PHP？

Question

我的ORACLE SQL中有以下查询：

SELECT dep.airport   AS DEPAIRPORT, 
   dep.scheduled AS SCHEDULED, 
   dep.ontime    AS ONTIME, 
   arr.arrontime AS ARRONTIME FROM   (SELECT AIRPORT,sum(FIRSTFLIGHT) AS FIRSTFLIGHT, SUM(OTPFIRSTFLIGHT) as OTPFIRSTFLIGHT, SUM(ZMDFIRSTFLIGHT) as ZMDFIRSTFLIGHT,
        COUNT(SCHEDULED) AS SCHEDULED,COUNT(ONTIME) AS ONTIME, COUNT(SCHEDARR) AS SCHEDARR FROM (SELECT DEPAIRPORT as AIRPORT,
    MAX(case when A.STATUS = 'Scheduled' and 
    A.ACTUAL_BLOCKOFF is not null then 1 else NULL END) as SCHEDULED,
    MAX(case when ((A.ACTUAL_BLOCKOFF+ interval '7' hour) - (A.SCHEDULED_DEPDT+ interval '7' hour))*24*60 <= '+000000015 00:00:00.000000000' and 
    A.ACTUAL_BLOCKOFF is not null then 1 else NULL END) as ONTIME,
    MAX(case when  A.STATUS = 'Scheduled' and A.ACTUAL_BLOCKON is not null then 1 else NULL END) as SCHEDARR
FROM TABLEA A left join TABLEB B ON A.FLIGHTLEGREF = B.FLIGHTLEGREF
where A.SERVICETYPE IN ('J','G') and to_char(SCHEDULED_DEPDT + interval '7' hour, 'yyyy-mm-dd') between '2018-07-15' and '2018-07-21' 
and A.LATEST_ARRIVALAIRPORT != A.SCHED_DEPARTUREAIRPORT and (SUFFIX != 'R' or SUFFIX IS NULL)
group by DEPAIRPORT, AIRCRAFTREG,SCHEDULED_DEPDT,ACTUAL_BLOCKOFF,ACTUAL_BLOCKON,AIRCRAFTTYPE,SCHEDULED_ARRDT)GROUP BY AIRPORT) dep
   left join (SELECT sched_arrivalairport AS airport, 
            count(CASE 
                    WHEN( ( a.actual_blockon + interval '7' hour ) - ( 
                                a.scheduled_arrdt + interval '7' hour ) ) * 
                        24 * 
                        60 
                        <= 
                              '+000000015 00:00:00.000000000' 
                        AND a.actual_blockon IS NOT NULL THEN 1 
                  END)     AS arrontime 
     FROM   TABLEA A 
     where A.SERVICETYPE IN ('J','G') and to_char(SCHEDULED_DEPDT + interval '7' hour, 'yyyy-mm-dd') between '2018-07-15' and '2018-07-21' 
     and A.LATEST_ARRIVALAIRPORT != A.SCHED_DEPARTUREAIRPORT and (SUFFIX != 'R' or SUFFIX IS NULL)
     GROUP  BY sched_arrivalairport)arr  
          ON ( dep.airport = arr.airport )order by dep.airport `

当我在oracle sql developer中编译这些代码时，它们完美地工作。 但是当我在代码点火器中转换为活动记录时，代码无法正常工作。 这是我在php中转换的代码：

$CI->db->select("DEP.AIRPORT   AS DEPAIRPORT, 
   DEP.scheduled AS SCHEDULED, 
   DEP.ontime    AS ONTIME, 
   ARR.arrontime AS ARRONTIME");
$CI->db->from("(");
$subq3 = $CI->db->get_compiled_select();
//$CI->db->reset_query();
$CI->db->select("DEPAIRPORT,sum(FIRSTFLIGHT) AS FIRSTFLIGHT, SUM(OTPFIRSTFLIGHT) as OTPFIRSTFLIGHT, SUM(ZMDFIRSTFLIGHT) as ZMDFIRSTFLIGHT,"
        . "SUM(SCHEDULED) AS SCHEDULED,SUM(ONTIME) AS ONTIME");
 $CI->db->from("(SELECT DEPAIRPORT as DEPAIRPORT,
    MAX(case when A.STATUS = 'Scheduled' and 
    A.ACTUAL_BLOCKOFF is not null then 1 else NULL END) as SCHEDULED,
    MAX(case when ((A.ACTUAL_BLOCKOFF+ interval '7' hour) - (A.SCHEDULED_DEPDT+ interval '7' hour))*24*60 <= '+000000015 00:00:00.000000000' and 
    A.ACTUAL_BLOCKOFF is not null then 1 else NULL END) as ONTIME FROM TABLEA A");$CI->db->join('TABLEB B', 'A.FLIGHTLEGREF = B.FLIGHTLEGREF','left');
$CI->db->where("A.LATEST_ARRIVALAIRPORT != A.SCHED_DEPARTUREAIRPORT");    $CI->db->where(divertStatus());
if ($stnService == "dom"){
$CI->db->where("A.SCHED_DEPARTUREAIRPORT IN (".$domstn.")");
}
if ($stnService == "int"){
$CI->db->where("A.SCHED_DEPARTUREAIRPORT IN (".$intstn.")");
}
if ($aptMgmt == "ap1"){
$CI->db->where_in("A.SCHED_DEPARTUREAIRPORT",$AP1);
}
if ($aptMgmt == "ap2"){
$CI->db->where_in("A.SCHED_DEPARTUREAIRPORT",$AP2);
}
if(!is_null($date1) && !is_null($date2))
$CI->db->where("to_char(SCHEDULED_DEPDT + interval '7' hour, 'yyyy-mm-dd') between '".$date1."' and '".$date2."'");
else $CI->db->where($timeLimit);
$CI->db->where("A.SERVICETYPE IN ('J','G')");
$CI->db->group_by("DEPAIRPORT, AIRCRAFTREG,SCHEDULED_DEPDT,ACTUAL_BLOCKOFF,ACTUAL_BLOCKON,AIRCRAFTTYPE,SCHEDULED_ARRDT) GROUP BY DEPAIRPORT) DEP ");
$subq1 = $CI->db->get_compiled_select();
//$CI->db->reset_query();
$CI->db->select("SCHED_ARRIVALAIRPORT AS AIRPORT, 
            count(CASE 
                    WHEN( ( A.ACTUAL_BLOCKON + interval '7' hour ) - ( 
                                A.SCHEDULED_ARRDT + interval '7' hour ) ) * 
                        24 * 
                        60 
                        <= 
                              '+000000015 00:00:00.000000000' 
                        AND A.ACTUAL_BLOCKON IS NOT NULL THEN 1 
                  END)     AS arrontime ");
$CI->db->from("TABLEA A ");
if(!is_null($date1) && !is_null($date2))
$CI->db->where("to_char(SCHEDULED_DEPDT + interval '7' hour, 'yyyy-mm-dd') between '".$date1."' and '".$date2."'");
else $CI->db->where($timeLimit);
$CI->db->where("A.SERVICETYPE IN ('J','G')");
$CI->db->where("A.LATEST_ARRIVALAIRPORT != A.SCHED_DEPARTUREAIRPORT");    $CI->db->where(divertStatus());
$CI->db->group_by("SCHED_ARRIVALAIRPORT)arr ON DEP.AIRPORT = ARR.AIRPORT");
$CI->db->order_by("DEP.DEPAIRPORT ASC");
$subq2 = $CI->db->get_compiled_select();
//$CI->db->reset_query();
$CI->db->query("$subq3 $subq1 LEFT JOIN ($subq2");

当我尝试编译转换后的代码时，总是会产生这样的结果

错误编号：904

ORA-00904：“ DEP”。“ AIRPORT”：无效的标识符

我在转换后的代码中错过了什么吗？ 任何建议，将不胜感激。 谢谢

Answer 1

您可以尝试使用Codeigniter query（）函数。 尝试这个：

$your_query = "paste here your ORACLE SQL";
$result = $CI->db->query($your_query)->result_array();

此函数返回结果数组。 此处的文档https：//www.codeigniter.com/userguide3 ...