재귀 쿼리에 CTE 적용

재귀 쿼리에 CTE 적용

CTE와 재귀 쿼리를 적용하려고 합니다.데이터베이스는 MariaDB 10.2 이후입니다.

업무 규칙은 다음과 같습니다.

1. 계정은 보유 또는 포트폴리오 중 하나입니다.
2. 보유는 주어진 금액으로 구성됩니다.
3. 홀딩은 활성화되거나 비활성화될 수 있습니다.
4. 포트폴리오에는 0개 이상의 계정이 포함되어 있으며 이러한 계정은 여러 포트폴리오에 속할 수 있습니다.
5. 포트폴리오의 가치를 결정할 때 각 계정의 총가치에 "가중치" 계수를 곱합니다.

제 스키마는 다음과 같습니다(주의).char아이디 타입은 일러스트레이션 목적으로만 사용되고 있습니다만, 정말 사용할 것입니다.int):

CREATE TABLE IF NOT EXISTS accounts (
  id CHAR(4) NOT NULL,
  name VARCHAR(45) NOT NULL,
  type ENUM('holding', 'portfolio') NULL,
  PRIMARY KEY (id))
ENGINE = InnoDB;

CREATE TABLE IF NOT EXISTS holdings (
  accounts_id CHAR(4) NOT NULL,
  value DECIMAL(6,2) NOT NULL,
  active TINYINT NOT NULL,
  PRIMARY KEY (accounts_id),
  CONSTRAINT fk_holdings_accounts
    FOREIGN KEY (accounts_id)
    REFERENCES accounts (id)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;

CREATE TABLE IF NOT EXISTS portfolios (
  accounts_id CHAR(4) NOT NULL,
  PRIMARY KEY (accounts_id),
  CONSTRAINT fk_portfolios_accounts1
    FOREIGN KEY (accounts_id)
    REFERENCES accounts (id)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;

CREATE TABLE IF NOT EXISTS portfolios_has_accounts (
  portfolios_id CHAR(4) NOT NULL,
  accounts_id CHAR(4) NOT NULL,
  weight DECIMAL(4,2) NOT NULL,
  PRIMARY KEY (portfolios_id, accounts_id),
  INDEX fk_portfolios_has_accounts_accounts1_idx (accounts_id ASC),
  INDEX fk_portfolios_has_accounts_portfolios1_idx (portfolios_id ASC),
  CONSTRAINT fk_portfolios_has_accounts_portfolios1
    FOREIGN KEY (portfolios_id)
    REFERENCES portfolios (accounts_id)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT fk_portfolios_has_accounts_accounts1
    FOREIGN KEY (accounts_id)
    REFERENCES accounts (id)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;

샘플 데이터는 다음과 같습니다.

INSERT INTO accounts(id,name,type) VALUES ('p1','portfolio1','portfolio'),('p2','portfolio2','portfolio'),('p3','portfolio3','portfolio'),('h1','holding1','holding'),('h2','holding2','holding'),('h3','holding3','holding'),('h4','holding4','holding');
INSERT INTO holdings(accounts_id,value,active) VALUES ('h1','50','1'),('h2','40','0'),('h3','70','1'),('h4','40','1');
INSERT INTO portfolios(accounts_id) VALUES ('p1'),('p2'),('p3');
INSERT INTO portfolios_has_accounts(portfolios_id,accounts_id,weight) VALUES ('p1','h1','1'),('p1','p2','0.5'),('p2','h2','2'),('p2','p3','1'),('p3','h3','2'),('p3','h4','0.5');

어카운트

id  name        type
p1  portfolio1  portfolio
p2  portfolio2  portfolio
p3  portfolio3  portfolio
h1  holding1    holding
h2  holding2    holding
h3  holding3    holding
h4  holding4    holding

포트폴리오

portfolios_id
p1
p2
p3

보유.

id value active
h1  50   1
h2  40   0
h3  70   1
h4  40   1

포트폴리오_has_displays

portfolios_id   accounts_id weight
p1               h1         1
p1               p2         0.5
p2               h2         2
p2               p3         1
p3               h3         2
p3               h4         0.5

제 목표는 다음을 찾는 것입니다.

1. 활성 보유만 포함된 모든 계정을 찾습니다.샘플 데이터가 p3, h1, h3 및 h4일 경우 p2는 활성화되지 않은h2를 포함하므로 포함되지 않으며 p1은 p2를 포함하므로 포함되지 않습니다.

2. 포트폴리오의 총 가치 p1.샘플 데이터를 지정하면 170:1*50 + 0.5*(2*40 + 1*(2*70 + 0.5*40 )입니다.

3. 포트폴리오 p1의 총가치를 산출하기 위해 보유지분에 곱한 상수.샘플 데이터를 지정하면 다음과 같습니다(1*h1 + 1*h2 + 1*h3 + 0.25*h4 = 170).

.

id  weight
h1  1
h2  1
h3  1
h4  .25

어떻게 하면 좋을까요?

이러한 작업을 다르게 해야 하는지, 아니면 성능 관점에서 해야 하는지, 주요 문제가 있는지 코멘트해 주십시오.

목표 #1

MariaDB [recursion]> WITH RECURSIVE t AS (
    ->     SELECT accounts_id FROM holdings WHERE active=0
    ->     UNION ALL
    ->     SELECT pha.portfolios_id
    ->     FROM portfolios_has_accounts pha
    ->     INNER JOIN t ON t.accounts_id=pha.accounts_id
    -> )
    -> SELECT a.* FROM accounts a
    -> LEFT OUTER JOIN t ON t.accounts_id=a.id
    -> WHERE t.accounts_id IS NULL;
+----+------------+-----------+
| id | name       | type      |
+----+------------+-----------+
| h1 | holding1   | holding   |
| h3 | holding3   | holding   |
| h4 | holding4   | holding   |
| p3 | portfolio3 | portfolio |
+----+------------+-----------+
4 rows in set (0.00 sec)

목표 #2

MariaDB [recursion]> WITH RECURSIVE t AS (
    -> SELECT pha.*, h.value
    -> FROM portfolios_has_accounts pha
    -> LEFT OUTER JOIN holdings h ON h.accounts_id=pha.accounts_id
    -> WHERE pha.portfolios_id="p1"
    -> UNION ALL
    -> SELECT pha.portfolios_id, pha.accounts_id, pha.weight*t.weight, h.value
    -> FROM t
    -> INNER JOIN portfolios_has_accounts pha ON pha.portfolios_id=t.accounts_id
    -> LEFT OUTER JOIN holdings h ON h.accounts_id=pha.accounts_id
    -> )
    -> SELECT SUM(weight*value) FROM t WHERE value IS NOT NULL;
+-------------------+
| SUM(weight*value) |
+-------------------+
| 170.0000          |
+-------------------+
1 row in set (0.00 sec)

목표 #3

MariaDB [recursion]> WITH RECURSIVE t AS (
    -> SELECT pha.*, h.value
    -> FROM portfolios_has_accounts pha
    -> LEFT OUTER JOIN holdings h ON h.accounts_id=pha.accounts_id
    -> WHERE pha.portfolios_id="p1"
    -> UNION ALL
    -> SELECT pha.portfolios_id, pha.accounts_id, pha.weight*t.weight, h.value
    -> FROM t
    -> INNER JOIN portfolios_has_accounts pha ON pha.portfolios_id=t.accounts_id
    -> LEFT OUTER JOIN holdings h ON h.accounts_id=pha.accounts_id
    -> )
    -> SELECT accounts_id, weight FROM t WHERE value IS NOT NULL;
+-------------+--------+
| accounts_id | weight |
+-------------+--------+
| h1          | 1.00   |
| h2          | 1.00   |
| h3          | 1.00   |
| h4          | 0.25   |
+-------------+--------+
4 rows in set (0.01 sec)

MariaDB [recursion]>

언급URL : https://stackoverflow.com/questions/45245347/applying-cte-for-recursive-queries