1.3.2.4.10. Goldendb-mysql

1.3.2.4.10.1. 插入

1.3.2.4.10.1.1. 支持return/returning子句(一般用于PLSQL中静态SQL)

-- 转换前Oracle SQL:
INSERT INTO students VALUES ('John Doe', 20)  RETURNING employee_id, salary INTO @v_employee_ids, @v_salaries;
INSERT INTO students (name, age)  VALUES ('John Doe', 20)  RETURNING employee_id, salary INTO v_employee_ids, v_salaries;
INSERT INTO students (name, age)  VALUES ('John Doe', 20)  RETURN employee_id, salary INTO @v_employee_ids, @v_salaries;
INSERT INTO students (name, age)  VALUES ('John Doe', 20)  RETURN employee_id, salary INTO v_employee_ids, v_salaries;

-- 转换后Goldendb-Mysql SQL:
INSERT INTO `students` VALUES ('John Doe', 20) RETURNING `employee_id`, `salary` INTO @v_employee_ids, @v_salaries;
INSERT INTO `students` (`name`, `age`) VALUES ('John Doe', 20) RETURNING `employee_id`, `salary` INTO `v_employee_ids`, `v_salaries`;
INSERT INTO `students` (`name`, `age`) VALUES ('John Doe', 20) RETURNING `employee_id`, `salary` INTO @v_employee_ids, @v_salaries;
INSERT INTO `students` (`name`, `age`) VALUES ('John Doe', 20) RETURNING `employee_id`, `salary` INTO `v_employee_ids`, `v_salaries`;

1.3.2.4.10.1.2. INSERT ALL

备注

因为原生 Goldendb-mysql 实现了 insert all 语句，因此统一SQL 采用透传方案。但，经过测试发现，Goldendb-mysql 只支持 insert all 的简单用法，如：

• 末尾的 select 语句不支持 where 子句；

• 不支持在 values 子句中使用 select 语句输出列的别名

• 多表插入还会存在一些异常

目前在 Oracle 中使用场景为批量插入，因为 Oracle 不支持多 values 子句。

-- 转换前Oracle SQL:
INSERT ALL
  INTO t1 values (1, 2, 3)
  INTO t1 values ('1', '2', '3')
SELECT 1 from dual;

-- 转换后Goldendb-Mysql SQL, 直接透传 insert all:
INSERT ALL
  INTO t1 VALUES (1,2,3)
  INTO t1 VALUES ('1','2','3')
SELECT 1 FROM dual;

1.3.2.4.10.2. 更新

1.3.2.4.10.2.1. 支持return/returning子句(一般用于PLSQL中静态SQL)

-- 转换前Oracle SQL:
UPDATE employees  SET salary = v_new_salary  WHERE employee_id = 101  RETURNING salary, eeee INTO @qw, :er;
UPDATE employees SET salary = v_new_salary WHERE employee_id = 101  RETURNING salary, eeee INTO qw, er;
UPDATE employees  SET salary = v_new_salary  WHERE employee_id = 101  RETURN salary, eeee INTO @qw, @er;
UPDATE employees SET salary = v_new_salary WHERE employee_id = 101  RETURN salary, eeee INTO qw, er;

-- 转换后Goldendb-Mysql SQL:
UPDATE `employees` SET `salary`=`v_new_salary` WHERE `employee_id`= 101 RETURNING `salary`, `eeee` INTO @qw, @er;
UPDATE `employees` SET `salary`=`v_new_salary` WHERE `employee_id`= 101 RETURNING `salary`, `eeee` INTO `qw`, `er`;
UPDATE `employees` SET `salary`=`v_new_salary` WHERE `employee_id`= 101 RETURNING `salary`, `eeee` INTO @qw, @er;
UPDATE `employees` SET `salary`=`v_new_salary` WHERE `employee_id`= 101 RETURNING `salary`, `eeee` INTO `qw`, `er`;

1.3.2.4.10.3. 删除

1.3.2.4.10.3.1. 支持return/returning子句(一般用于PLSQL中静态SQL)

-- 转换前Oracle SQL:
DELETE FROM employees WHERE salary < 3000  RETURNING employee_id, salary INTO @v_employee_ids, @v_salaries;
DELETE FROM employees WHERE salary < 3000  RETURNING employee_id, salary INTO v_employee_ids, v_salaries;
DELETE FROM employees WHERE salary < 3000  RETURN employee_id, salary INTO @v_employee_ids, @v_salaries;
DELETE FROM employees WHERE salary < 3000  RETURN employee_id, salary INTO v_employee_ids, v_salaries;

-- 转换后Goldendb-Mysql SQL:
DELETE FROM `employees` WHERE `salary`<3000 RETURNING `employee_id`, `salary` INTO @v_employee_ids, @v_salaries;
DELETE FROM `employees` WHERE `salary`<3000 RETURNING `employee_id`, `salary` INTO `v_employee_ids`, `v_salaries`;
DELETE FROM `employees` WHERE `salary`<3000 RETURNING `employee_id`, `salary` INTO @v_employee_ids, @v_salaries;
DELETE FROM `employees` WHERE `salary`<3000 RETURNING `employee_id`, `salary` INTO `v_employee_ids`, `v_salaries`;