Mysql 存储过程查询总价，函数查询总价

1. 函数过程查询总价

DELIMITER $$

DROP FUNCTION IF EXISTS selectProjectTotalPrice$$
CREATE FUNCTION selectProjectTotalPrice(projectId varchar(50)) returns decimal(10,2)
BEGIN
    -- 需要定义接收游标数据的变量
#    定义项目的总价
    DECLARE projectTotalPrice decimal(10, 2) default 0.00;
#    定义每个配置的总价
    DECLARE configTotalPrice decimal(10, 2) default 0.00;
#     定义配置id
    DECLARE configId varchar(50);

    -- 遍历数据结束标志
    DECLARE NO_MORE_RECORD BOOLEAN DEFAULT FALSE;

    -- 游标
    DECLARE cur CURSOR FOR select t.id from config t where t.project_id = projectId and t.is_deleted = 0;

    -- 将结束标志绑定到游标
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET NO_MORE_RECORD = TRUE;
    -- 打开游标
    OPEN cur;

    -- 开始循环
    read_loop:
    LOOP
        -- 提取游标里的数据，这里只有一个，多个的话也一样；
        FETCH cur INTO configId;
        -- 声明结束的时候
        IF NO_MORE_RECORD THEN
            LEAVE read_loop;
        END IF;
        -- 这里做你想做的循环的事件

        select selectConfigSummary(configId) into configTotalPrice;

        SET projectTotalPrice = projectTotalPrice + configTotalPrice;

    END LOOP;
    -- 关闭游标
    CLOSE cur;

    RETURN projectTotalPrice;
END $$
DELIMITER ;

2. 存储过程查询总价

DELIMITER $$

DROP PROCEDURE IF EXISTS selectProjectPrice$$
CREATE PROCEDURE selectProjectPrice(IN projectId varchar(50))
BEGIN
    -- 需要定义接收游标数据的变量
#    定义项目的总价
    DECLARE projectTotalPrice decimal(10, 2) default 0.00;
#    定义每个配置的总价
    DECLARE configTotalPrice decimal(10, 2) default 0.00;
#     定义配置id
    DECLARE configId varchar(50);

    -- 遍历数据结束标志
    DECLARE NO_MORE_RECORD BOOLEAN DEFAULT FALSE;

    -- 游标
    DECLARE cur CURSOR FOR select t.id from config t where t.project_id = projectId and t.is_deleted = 0;

    -- 将结束标志绑定到游标
    DECLARE CONTINUE HANDLER FOR NOT FOUND SET NO_MORE_RECORD = TRUE;
    -- 打开游标
    OPEN cur;

    -- 开始循环
    read_loop:
    LOOP
        -- 提取游标里的数据，这里只有一个，多个的话也一样；
        FETCH cur INTO configId;
        -- 声明结束的时候
        IF NO_MORE_RECORD THEN
            LEAVE read_loop;
        END IF;
        -- 这里做你想做的循环的事件

        select selectConfigSummary(configId) into configTotalPrice;

        SET projectTotalPrice = projectTotalPrice + configTotalPrice;

    END LOOP;
    -- 关闭游标
    CLOSE cur;

    select projectTotalPrice;
END $$
DELIMITER ;

函数

# 查询配置的 ats 价格 = 总价 + 铜价
drop function if exists selectConfigAtsSummary;
create function selectConfigAtsSummary(configId varchar(50)) returns decimal(10, 2)
begin
    declare summary decimal(10, 2);

    SELECT sum(ifnull(total_price, 0) + ifnull(copper_price, 0)) into summary FROM config_ats t
    where t.config_id = configId and t.is_deleted = 0;

    if summary is null then
        set summary = 0.00;
    end if;

    return summary;
end;


# 查询配置的 断路器价格 = 总价 + 铜价
drop function if exists selectConfigBreakerSummary;
create function selectConfigBreakerSummary(configId varchar(50)) returns decimal(10, 2)
begin
    declare summary decimal(10, 2);

    SELECT sum(ifnull(total_price, 0) + ifnull(copper_price, 0)) into summary FROM config_device_parts t
    where t.config_id = configId and t.is_deleted = 0;

    if summary is null then
        set summary = 0.00;
    end if;

    return summary;
end;


# 查询配置的 配件价格 = 各种配件总价
drop function if exists selectConfigFittingSummary;
create function selectConfigFittingSummary(configId varchar(50)) returns decimal(10, 2)
begin
    declare summary decimal(10, 2);

    SELECT sum(ifnull(total_price, 0)) into summary FROM config_fitting t
    where t.config_id = configId and t.is_deleted = 0;

    if summary is null then
        set summary = 0.00;
    end if;

    return summary;
end;

# 查询配置的 断路器配件价格 = 配置的所有断路器的所有配件之和
drop function if exists selectConfigDpfSummary;
create function selectConfigDpfSummary(configId varchar(50)) returns decimal(10, 2)
begin
    declare summary decimal(10, 2);

    select sum(ifnull(total_price, 0)) into summary from config_dpf t
    where t.cdp_id in (
        select cdp.id from config_device_parts cdp where cdp.config_id = configId and cdp.is_deleted = 0
    ) and t.is_deleted = 0;


    if summary is null then
        set summary = 0.00;
    end if;

    return summary;
end;


# 查询柜子本身价格
drop function if exists selectConfigSummary;
create function selectConfigSummary(configId varchar(50)) returns decimal(10, 2)
begin
    declare summary decimal(10, 2);

    select ifnull(t.sale_price, 0) into summary from device t
    where t.id = (select c.cabinet_id from config c where c.id = configId);

    if summary is null then
        set summary = 0.00;
    end if;

    return summary;
end;

# FIXME 查询配电柜价格(未计算辅材？？百分比？？)
drop function if exists selectCabinetPrice;
create function selectCabinetPrice(configId varchar(50)) returns decimal(10, 2)
begin

    declare summary decimal(10, 2);

    select selectConfigSummary(configId) +
           selectConfigAtsSummary(configId) +
           selectConfigBreakerSummary(configId) +
           selectConfigDpfSummary(configId) +
           selectConfigFittingSummary(configId) into  summary;

    if summary is null then
        set summary = 0.00;
    end if;

    return summary;
end;