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我有一个存储过程，我试图从我的 php.ini 调用。这是存储过程：

BEGIN
DECLARE done INT DEFAULT FALSE;
declare phone_temp VARCHAR(20) default '';
declare phone_cur cursor for SELECT DISTINCT sentNum FROM Queue;
declare continue handler for not found set done = true;

#create temp table
create temporary table if not exists temp_return AS SELECT * FROM Queue LIMIT 0;
#empty if exists
delete from temp_return;

open phone_cur;

phone_loop: LOOP
    fetch phone_cur into phone_temp;
    if done then
        leave phone_loop;
    end if;

   insert into temp_return SELECT * FROM Queue WHERE num2=phone_temp LIMIT 2;
   insert into temp_return SELECT * FROM Queue WHERE num1=phone_temp LIMIT 1;
end loop phone_loop;
close phone_cur;

select * from temp_return;

drop table if exists temp_return;
END

直接在mysql workbench中，调用就可以了。在 php 中，它不起作用。这是我的php：

function grabFromSmsQueue(){
    global $myStmt, $conn;
    if(isset($myStmt)){
        $myStmt -> execute();
    }
    else{
        $query = "CALL myStoredProc();";
        $myStmt = $conn->stmt_init();
        $myStmt -> prepare($query);
        $myStmt -> execute();

    }
    $result = $myStmt -> get_result();
    //print_r ($result);
    $info = [];
    if(isset($result)){
        while($data = $result->fetch_assoc()){
            $info[] = $data;
        }
    }
    return $info;
}

像这样连接，我收到以下错误

The localhost page isn’t working
localhost didn’t send any data.
ERR_EMPTY_RESPONSE

$data = $result->fetch_assoc()我将我print_r的问题追溯到mysqli_result Object ( [current_field] => 0 [field_count] => 9 [lengths] => [num_rows] => 0 [type] => 1 ). 我得出的结论是它不起作用，因为[num_rows] => 0.

现在，回到我的存储过程，我删除了所有提到的游标并将其替换为硬编码值，它在工作台和 php 中都有效。我已经验证了通过 php 连接的用户有权限，连接是打开的，并且相同的代码可以执行其他存储过程（那些不包括游标的）。这是否意味着我不能在 php 调用的存储过程中使用游标？有没有光标的替代品？我是否在我的 php 语法中遗漏了一些处理游标的内容？

4

1 回答 1

1

基于 3 个分组的聊天讨论，这为测试数据提供了SQLFiddle（那里的数据不多）。

由于测试数据具有与该数据相关的位置的滑动窗口，now()因此使用以下变量“冻结” now()。只是为了方便测试和验证输出。

因此，最终放弃它并更改使用它的代码中的 4 个引用（请注意，第 3 组使用它两次）。

now()变量：

select @theNow:=now();
-- REM OUT the following line. It is used only for testing (as now will chg, your data won't)
select @theNow:='2016-06-23 14:00:00';

查询：

select id,sentNum,message,sentTime,startAtTime,sentByTime,msgType,theGrp from
(   select id,sentNum,message,sentTime,startAtTime,sentByTime,msgType,theGrp,
    if(sentNum!=@lastSentNum,greatest(@sentNumChg:=1,0),least(@sentNumChg:=0,1)) as dummy1,
    if(theGrp!=@lastGrp,greatest(@grpChg:=1,0),least(@grpChg:=0,1)) as dummy2,
    if(@sentNumChg=1 or @grpChg=1,@seqNum:=1,@seqNum:=@seqNum+1) as seqNum,
    @lastSentNum:=sentNum as setLast01,
    @lastGrp:=theGrp as setLast02
    from
    (   -- GROUP 1: sentByTime<=now(), INVITE
        select `id`, `sentNum`, `message`, `sentTime`, `startAtTime`, `sentByTime`, `msgType`, 1 as theGrp
        from SmsQueue
        where sentByTime<=@theNow and msgType='invite'
        UNION ALL
        -- GROUP 2 startAtTime<=now(), BROADCAST
        select `id`, `sentNum`, `message`, `sentTime`, `startAtTime`, `sentByTime`, `msgType`, 2 as theGrp
        from SmsQueue
        where startAtTime<=@theNow and msgType='broadcast'
        UNION ALL
        -- GROUP 3: sentByTime>now() && startAtTime<=now(), INVITE
        select `id`, `sentNum`, `message`, `sentTime`, `startAtTime`, `sentByTime`, `msgType`, 3 as theGrp
        from SmsQueue
        where sentByTime>@theNow and startAtTime<=@theNow and msgType='invite'
    ) d1
    cross join (select @sentNumChg:=0,@grpChg:=0,@lastSentNum:='',@lastGrp:=0,@seqNum:=0) as xParams
    order by sentNum,theGrp,sentByTime,id -- id is the tie-break
) d2
where (theGrp=1 and seqNum<3) or (theGrp=2 and seqNum=1) or (theGrp=3 and seqNum=1)
order by sentNum,theGrp;

输出（我的客户端工具目前受到文本挑战）： 在此处输入图像描述

有关高级变量用法，请参阅我的此答案顶部的一般评论。

于 2016-06-23T19:48:55.413 回答