Question

我有一个使用H2作为内存数据库的测试。下表，数据和查询在MySQL中生成具有预期值的单行，但不在H2中生成：

CREATE TABLE redirects (
  site_id    INTEGER NOT NULL,
  company_id INTEGER NOT NULL,
  type       CHAR(1) NOT NULL,
  capture    TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
);

INSERT INTO redirects (site_id, company_id, type, capture) VALUES (1, 1, 'm', CURRENT_TIMESTAMP);
INSERT INTO redirects (site_id, company_id, type, capture) VALUES (1, 2, 'm', CURRENT_TIMESTAMP);
INSERT INTO redirects (site_id, company_id, type, capture) VALUES (1, 1, 'h', CURRENT_TIMESTAMP);
INSERT INTO redirects (site_id, company_id, type, capture) VALUES (1, 1, 'h', CURRENT_TIMESTAMP);
INSERT INTO redirects (site_id, company_id, type, capture) VALUES (1, 2, 'h', CURRENT_TIMESTAMP);
INSERT INTO redirects (site_id, company_id, type, capture) VALUES (1, 1, 'a', CURRENT_TIMESTAMP);
INSERT INTO redirects (site_id, company_id, type, capture) VALUES (1, 1, 'a', CURRENT_TIMESTAMP);
INSERT INTO redirects (site_id, company_id, type, capture) VALUES (1, 1, 'a', CURRENT_TIMESTAMP);
INSERT INTO redirects (site_id, company_id, type, capture) VALUES (1, 2, 'a', CURRENT_TIMESTAMP);

SELECT
    COALESCE(site_id, 1) site_id,
    COALESCE(company_id, -1) company_id,
    COUNT(CASE WHEN type = 'm' THEN 1 END) views,
    COUNT(CASE WHEN type IN ('h', 'a') THEN 1 END) clicks
FROM 
    redirects
WHERE 
    (site_id = 1 AND company_id = 3 AND capture > TIMESTAMP '2017-04-24 00:00:00.0');

MySQL中的结果如下：

+---------+------------+-------+--------+
| site_id | company_id | views | clicks |
+---------+------------+-------+--------+
|       1 |         -1 |     0 |      0 |
+---------+------------+-------+--------+

但是，在H2（版本1.4.194）中，结果是：

SITE_ID     COMPANY_ID      VIEWS   CLICKS  
1           2               0       0

有计数和案例选择的错误

0 个答案: