我需要优化此代码的性能。表中大约有300万个寄存器需要更新。
我将它们以1000个为单位进行批处理，这样我就不会用完内存。
我正在使用postgres。
$queryCount = $conn->prepare('
SELECT COUNT(*) AS totalAdoptions
FROM adoptions_test
INNER JOIN pet_type ON adoptions_test.petTypeID = pet_type.petTypeID
INNER JOIN breeds ON adoptions_test.breedID = breeds.breedID
INNER JOIN users ON adoptions_test.userID = users.userID
INNER JOIN cities ON adoptions_test.cityID = cities.cityID
WHERE adoptionStatus = \'Open\'
AND adoptions_test.cityID = ?');
$queryCount->bindParam(1, $cityID);
if ($queryCount->execute()) {
$adoptionCount = $queryCount->fetch();
$response = array();
if ($adoptionCount != null) {
$response["error"] = false;
$response["totalAdoptions"] = $adoptionCount["totalAdoptions"];
$query = $conn->prepare("SELECT * FROM adoptions_test
INNER JOIN pet_type ON adoptions_test.petTypeID = pet_type.petTypeID
INNER JOIN breeds ON adoptions_test.breedID = breeds.breedID
INNER JOIN users ON adoptions_test.userID = users.userID
INNER JOIN cities ON adoptions_test.cityID = cities.cityID
WHERE adoptionStatus = \"Open\"
AND adoptions_test.cityID = ?
LIMIT " . $offsetNumber . ", " . $itemsPerPage);
$query->bindParam(1, $cityID);
if ($query->execute()) {
$response = array();
$response["error"] = false;
$response["totalPages"] = ceil($adoptionCount["totalAdoptions"] / $itemsPerPage);
$response["pageNumber"] = ceil($pageNumber);
$adoptions = $query->fetchAll();
if ($adoptions != null) {
$response["adoptions"] = array();
$refs = Array();
foreach ($adoptions as $adoption) {
$tmp = array();
$tmp["adoptionID"] = $adoption["adoptionID"];
$tmp["petTypeID"] = $adoption["petTypeID"];
$tmp["petTypeName"] = $adoption["petTypeName"];
$tmp["breedID"] = $adoption["breedID"];
$tmp["breedName"] = $adoption["breedName"];
$tmp["userID"] = $adoption["userID"];
$tmp["userName"] = $adoption["userName"];
$tmp["cityID"] = $adoption["cityID"];
$tmp["cityName"] = $adoption["cityName"];
$tmp["adoptionName"] = $adoption["adoptionName"];
$tmp["adoptionCoverPhoto"] = $adoption["adoptionCoverPhoto"];
$tmp["adoptionDescription"] = $adoption["adoptionDescription"];
$tmp["adoptionGender"] = $adoption["adoptionGender"];
$tmp["adoptionTimeStamp"] = $adoption["adoptionTimeStamp"];
$tmp["adoptionStatus"] = $adoption["adoptionStatus"];
$refs[$adoption["adoptionID"]] = &$tmp;
array_push($response["adoptions"], $tmp);
}
$queryPromotedCount = $conn->prepare('SELECT adoption_promoted.adoptionID,COUNT(*) AS totalPromoted
FROM adoption_promoted
INNER JOIN adoptions_test ON adoption_promoted.adoptionID = adoptions_test.adoptionID
WHERE adoptions_test.cityID = ?
AND CURDATE() BETWEEN promotedFrom AND promotedTo
GROUP BY adoption_promoted.adoptionID');
$queryPromotedCount->bindParam(1, $cityID);
if ($queryPromotedCount->execute()) {
$promotedCount = $queryPromotedCount->fetchAll();
if ($promotedCount != NULL) {
foreach($promotedCount as $promoted)
{
$adoptionID = $promoted["adoptionID"];
$refs[$adoptionID]["totalPromoted"] = $promoted["totalPromoted"];
$queryPromoted = $conn->prepare("SELECT * FROM adoption_promoted
INNER JOIN adoptions_test ON adoption_promoted.adoptionID = adoptions_test.adoptionID
INNER JOIN pet_type ON adoptions_test.petTypeID = pet_type.petTypeID
INNER JOIN breeds ON adoptions_test.breedID = breeds.breedID
INNER JOIN users ON adoptions_test.userID = users.userID
INNER JOIN cities ON adoptions_test.cityID = cities.cityID
WHERE adoptions_test.adoptionStatus = \"Open\"
AND adoptions_test.cityID = ?
AND adoption_promoted.adoptionID = ?
AND CURDATE() BETWEEN promotedFrom AND promotedTo
LIMIT " . $promotedOffsetNumber . ", " . $promotedItemsPerPage);
$queryPromoted->bindParam(1, $cityID);
$queryPromoted->bindParam(2, $adoptionID);
if ($queryPromoted->execute()) {
$response["error"] = false;
$refs[$adoptionID]["totalPromotionPages"] = ceil($promoted["totalPromoted"] / $promotedItemsPerPage);
$refs[$adoptionID]["promotionPageNumber"] = ceil($pageNumber);
$promotionsList = $queryPromoted->fetchAll();
if ($promotionsList != NULL) {
$refs[$adoptionID]["promotions"] = array();
foreach ($promotionsList as $promotion) {
$tmp = array();
$tmp["promotedID"] = $promotion["promotedID"];
$tmp["adoptionID"] = $promotion["adoptionID"];
$tmp["optionID"] = $promotion["optionID"];
$tmp["paymentID"] = $promotion["paymentID"];
$tmp["promotedFrom"] = $promotion["promotedFrom"];
$tmp["promotedTo"] = $promotion["promotedTo"];
$tmp["promotedTimestamp"] = $promotion["promotedTimestamp"];
$tmp["petTypeID"] = $promotion["petTypeID"];
$tmp["petTypeName"] = $promotion["petTypeName"];
$tmp["breedID"] = $promotion["breedID"];
$tmp["breedName"] = $promotion["breedName"];
$tmp["userID"] = $promotion["userID"];
$tmp["userName"] = $promotion["userName"];
$tmp["cityID"] = $promotion["cityID"];
$tmp["cityName"] = $promotion["cityName"];
$tmp["adoptionName"] = $promotion["adoptionName"];
$tmp["adoptionCoverPhoto"] = $promotion["adoptionCoverPhoto"];
$tmp["adoptionDescription"] = $promotion["adoptionDescription"];
$tmp["adoptionGender"] = $promotion["adoptionGender"];
$tmp["adoptionTimeStamp"] = $promotion["adoptionTimeStamp"];
$tmp["adoptionStatus"] = $promotion["adoptionStatus"];
array_push($refs[$adoptionID]["promotions"], $tmp);
}
}
}
}
}
}
} else {
$response["error"] = true;
$response["message"] = "There are no open Adoptions available. Please try again";
}
/** SHOW THE RESULT **/
$content_type = 'application/json';
return $result->withStatus(200)
->withHeader('Content-type', $content_type)
->write(json_encode($response));
}
}
}
谢谢！