mysql - mysql クエリの実行パフォーマンスを向上させる方法

Question

以下のように prog という名前のメインテーブルがあります。

CREATE TABLE `prog` (
 `prog_id` int(11) NOT NULL AUTO_INCREMENT,
 `prog_insert_date` varchar(16) COLLATE utf8_persian_ci NOT NULL,
 `prog_edit_date` varchar(16) COLLATE utf8_persian_ci DEFAULT NULL,
 `prog_name` text COLLATE utf8_persian_ci NOT NULL,
 `prog_desc` text COLLATE utf8_persian_ci NOT NULL,
 PRIMARY KEY (`prog_id`),
 KEY `prog_insert_date` (`prog_sabt_date`),
 KEY `prog_edit_date` (`prog_edit_date`)
) ENGINE=InnoDB AUTO_INCREMENT=1;

INSERT INTO prog VALUES
(1,'1395-01-01 11:00','1395-01-01 12:00','prog A', 'prog A description'),
(2,'1395-01-02 11:00','1395-01-02 12:00','prog B', 'prog B description'),
(3,'1395-01-03 11:00','1395-01-03 12:00','prog C', 'prog C description');

アプリで Jalali カレンダーを使用する必要があるため、日付列に varchar(16) を使用し、次の形式で保存することにしました'1395-07-20 12:43'。

また、それぞれに対応するいくつかの行を含む 3 つの同様のテーブルがありますprog_id。それらは、以下のようにクレジット、ファンド、ペイです。

CREATE TABLE `credit` (
 `credit_id` int(11) NOT NULL AUTO_INCREMENT,
 `credit_insert_date` varchar(16) COLLATE utf8_persian_ci NOT NULL,
 `credit_edit_date` varchar(16) COLLATE utf8_persian_ci NOT NULL,
 `credit_prog` int(11) NOT NULL,
 `credit_amount` bigint(20) NOT NULL,
 `credit_desc` text COLLATE utf8_persian_ci NOT NULL,
 PRIMARY KEY (`credit_id`),
 KEY `credit_prog` (`credit_prog`),
 KEY `credit_insert_date` (`credit_insert_date`),
 KEY `credit_edit_date` (`credit_edit_date`)
) ENGINE=InnoDB AUTO_INCREMENT=1;

INSERT INTO credit VALUES
(1,'1395-02-01 11:00','1395-02-01 12:00',1, 100000, 'sample description'),
(2,'1395-02-02 11:00','1395-02-02 12:00',1, 200000, 'sample description'),
(3,'1395-02-03 11:00','1395-02-03 12:00',2, 300000, 'sample description'),
(4,'1395-02-04 11:00','1395-02-04 12:00',2, 400000, 'sample description'),
(5,'1395-02-05 11:00','1395-02-05 12:00',3, 500000, 'sample description'),
(6,'1395-02-06 11:00','1395-02-06 12:00',3, 600000, 'sample description');

CREATE TABLE `fund` (
 `fund_id` int(11) NOT NULL AUTO_INCREMENT,
 `fund_insert_date` varchar(16) COLLATE utf8_persian_ci NOT NULL,
 `fund_edit_date` varchar(16) COLLATE utf8_persian_ci NOT NULL,
 `fund_prog` int(11) NOT NULL,
 `fund_amount` bigint(20) NOT NULL,
 `fund_desc` text COLLATE utf8_persian_ci NOT NULL,
 PRIMARY KEY (`fund_id`),
 KEY `fund_prog` (`fund_prog`),
 KEY `fund_insert_date` (`fund_insert_date`),
 KEY `fund_edit_date` (`fund_edit_date`)
) ENGINE=InnoDB AUTO_INCREMENT=1;

INSERT INTO fund VALUES
(1,'1395-03-01 11:00','1395-03-01 12:00',1, 10000, 'sample description'),
(2,'1395-03-02 11:00','1395-03-02 12:00',1, 20000, 'sample description'),
(3,'1395-03-03 11:00','1395-03-03 12:00',2, 30000, 'sample description'),
(4,'1395-03-04 11:00','1395-03-04 12:00',2, 40000, 'sample description'),
(5,'1395-03-05 11:00','1395-03-05 12:00',3, 50000, 'sample description'),
(6,'1395-03-06 11:00','1395-03-06 12:00',3, 60000, 'sample description');

CREATE TABLE `pay` (
 `pay_id` int(11) NOT NULL AUTO_INCREMENT,
 `pay_insert_date` varchar(16) COLLATE utf8_persian_ci NOT NULL,
 `pay_edit_date` varchar(16) COLLATE utf8_persian_ci NOT NULL,
 `pay_prog` int(11) NOT NULL,
 `pay_amount` bigint(20) NOT NULL,
 `pay_desc` text COLLATE utf8_persian_ci NOT NULL,
 PRIMARY KEY (`pay_id`),
 KEY `pay_prog` (`pay_prog`),
 KEY `pay_insert_date` (`pay_insert_date`),
 KEY `pay_edit_date` (`pay_edit_date`)
) ENGINE=InnoDB AUTO_INCREMENT=1;

INSERT INTO pay VALUES
(1,'1395-04-01 11:00','1395-04-01 12:00',1, 1000, 'sample description'),
(2,'1395-04-02 11:00','1395-04-02 12:00',1, 2000, 'sample description'),
(3,'1395-04-03 11:00','1395-04-03 12:00',2, 3000, 'sample description'),
(4,'1395-04-04 11:00','1395-04-04 12:00',2, 4000, 'sample description'),
(5,'1395-04-05 11:00','1395-04-05 12:00',3, 5000, 'sample description'),
(6,'1395-04-06 11:00','1395-04-06 12:00',3, 6000, 'sample description');

ここで、すべてのテーブルから構築する必要があるクレジット、資金、支払いの合計と最終編集日を含む各プログ行を作成したいと考えています。私のクエリは次のとおりです。

SELECT
  prog_id,
  GREATEST(IFNULL(credit_edit_date,''),IFNULL(fund_edit_date,''),IFNULL(pay_edit_date,'')) last_edit_date,
  prog_name,
  credit_amount,
  fund_amount,
  pay_amount,
  prog_desc
FROM prog
LEFT JOIN (
   SELECT
        credit_prog,
        sum(credit_amount) as credit_amount,
        max(credit_edit_date) as credit_edit_date
    FROM credit GROUP BY credit_prog
) as credit ON credit_prog=prog_id
LEFT JOIN (
   SELECT 
        fund_prog,
        sum(fund_amount) as fund_amount,
        max(fund_edit_date) as fund_edit_date
    FROM fund GROUP BY fund_prog
) as fund ON fund_prog=prog_id
LEFT JOIN (
   SELECT 
        pay_prog,
        sum(pay_amount) as pay_amount,
        max(pay_edit_date) as pay_edit_date
    FROM pay GROUP BY pay_prog
) as pay ON pay_prog=prog_id
ORDER BY (SELECT last_edit_date) DESC

本当の結果が得られますが、テーブルに複数の行がある実際のケースでは、応答に時間がかかりすぎます。last_edit_date主な問題は列であり、その MYSQL オプティマイザーはサブクエリのこれらの日付フィールドのインデックスを考慮できないためだと思います。

sqlfiddle

実行時間を改善するためのアイデアはありますか?

mysql - mysql クエリの実行パフォーマンスを向上させる方法

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