通过每条记录的更新/选择进行优化

Question

此脚本可以正常工作，但在更新时运行速度非常慢。问题是，对于我从源（DB2）数据库中选择的每条记录，我必须检查该记录（在我的逻辑条件下）是否已经存在，如果是，那么新记录是否与现有记录的到期窗口一致。如果是这样，它会更新。如果不是它插入。插入是非常快速的，正如预期的那样，但是因为我在while循环中执行更新查询，所以更新速度很慢。

同样，我必须检查每条记录，因为它们经常发生，因此我不能只进行批量选择然后使用逻辑进行更新，因为select可能包含记录1 - 100而我的while循环可能包含记录111，而记录110是需要更新的相同记录。那有意义吗？因此，如果没有在记录111处进行选择，它将插入而不是更新，因为它不会记录记录110，因为初始选择最多只包含100个。

这里的逻辑有点奇怪，这是有原因的，但它又有效。我只是希望能够快速优化更新。

$detailStatCheck = "
    SELECT 
         ordrnum as order,
         stat as STATUS,
         cust AS customer,
         build AS build,
         matrl AS matrl,
         pattern AS pattern ,
         date AS SHIPDATE,
         qty AS QUANTITY,
         case when p.stores is null then 1 else p.stores end as STORES
    FROM table1 g
    left join table2 p on g.cust = p.cust;
";

try {
    $detailCheck = $DB2conn->prepare($detailStatCheck);
    $detailRslt = $detailCheck->execute();
    $count2 = $detailCheck->fetch();
    print_r($count2);
}catch(PDOException $ex) {
    echo "QUERY ONE FAILED!: " .$ex->getMessage();
}

$validCheck = "
        SELECT 
            sku_id,
            customer_id,
            expire_date
        FROM customerplacetest p
            INNER JOIN skus s
                ON p.sku_id = s.id
        WHERE p.customer_id = :customer
            AND   s.build = :build
            AND   s.matrl1 = :matrl
            AND   s.pattern1 = :pattern
            AND   p.expire_date > date_add(convert(:SHIPDATE,date), interval 7 day)
    ";

$updatePlacement = "
        UPDATE customerplacetest d
        inner join skus s
        ON d.sku_id = s.id
        SET expire_date = DATE_ADD(DATE_FORMAT(CONVERT(:SHIPDATE, CHAR(20)), '%Y-%m-%d'),INTERVAL 127 DAY),
            quantity = :QUANTITY
        WHERE d.customer_id = :customer
        AND s.build = :build
        AND s.matrl1 = :matrl
        AND s.pattern1 = :pattern

    ";

$checkExistingValid = $MysqlConn->prepare($validCheck);
$insert = $MysqlConn->prepare($insertPlacement);
$update = $MysqlConn->prepare($updatePlacement);


while ($row2 = $detailCheck->fetch(PDO::FETCH_ASSOC)) {

        $values = [
            ":customer" => $row2["customer"],
            ":SHIPDATE" => $row2["SHIPDATE"],
            ":STORES" => $row2["STORES"],
            ":QUANTITY" => $row2["QUANTITY"],
            ":order" => $row2["order"],
            ":build" => $row2["build"],
            ":matrl" => $row2["matrl"],
            ":pattern" => $row2["pattern"],
        ];

        $values2 = [
            ":customer" => $row2["customer"],
            ":build" => $row2["build"],
            ":matrl" => $row2["matrl"],
            ":pattern" => $row2["pattern"],
            ":SHIPDATE" => $row2["SHIPDATE"],
        ];

        $values3 = [
            ":SHIPDATE" => $row2["SHIPDATE"],
            ":QUANTITY" => $row2["QUANTITY"],
            ":customer" => $row2["customer"],
            ":build" => $row2["build"],
            ":matrl" => $row2["matrl"],
            ":pattern" => $row2["pattern"],
        ];


        try{

            //Array will contain records that are valid
            $existingVldRslt = $checkExistingValid->execute($values2);
            $count4 = $checkExistingValid->fetch(PDO::FETCH_ASSOC);

            print_r($count4);

            }catch(PDOException $ex){
                    echo "QUERY TWO FAILED!!!: " . $ex->getMessage();
            }

                if(!empty($count4)){
                    print_r("updating");

                        for($i=0; $i<$row2['QUANTITY']; $i++){
                            try{
                                $updateRslt = $update->execute($values3);
                            }catch(PDOException $ex){
                                echo "UPDATE_FAILED!!!: " . $ex->getMessage();
                            }
                        }
                }else{
                    print_r("inserting");
                    if($row2["QUANTITY"] >= $row2["STORES"]){
                        for($i=0; $i<$row2["STORES"]; $i++){     
                            try{
                                $insertRslt = $insert->execute($values);
                            }catch(PDOException $ex){
                                echo "INSERT_FAILED!!!: " . $ex->getMessage();
                            }
                        }
                    }elseif($row2["QUANTITY"] < $row2["STORES"]){
                        for($i=0; $i<$row2["QUANTITY"]; $i++){   
                            try{
                                $insertRslt = $insert->execute($values);
                            }catch(PDOException $ex){
                                echo "INSERT_FAILED!!!: " . $ex->getMessage();
                            }
                        }
                    }
                }
         }