表格项目
表销售
最后:表SaleItems
程序PLAYER_CREATE_SALE
:
输入参数:
- in_player_id int
- in_total 整数
- in_items_ids nvarchar(500)
- in_items_quantity nvarchar(500)
基本上,“用户”会看到上面的商品列表,选择任何商品,更改金额并购买。这应该像“购物车”一样工作。
例如:用户选择炸弹(id:1,数量:10)和装备(id:3,数量:2)
我的程序的参数如下所示:
in_player_id:750
总数量:390
in_items_ids:“1,3”
in_items_quantity:“10,2”
该过程实际上是这样进行的:
INSERT INTO Sale(`player_id`, `total_coins_price`)
VALUES(in_player_id, in_total);
SET @sale_id = LAST_INSERT_ID();
SET @squery = CONCAT("INSERT INTO SaleItems(`sale_id`, `item_id`, `quantity`)
SELECT ", @sale_id, ", id, 9999 FROM Items WHERE id IN (", in_items_ids, ")");
PREPARE stmt FROM @squery;
EXECUTE stmt;
使用上面的代码,最终结果将是:
但是数量不对。我也不知道如何插入数量。应该是这样:
最佳答案
也许是这样的
DROP PROCEDURE IF EXISTS P;
DELIMITER //
CREATE DEFINER=`root`@`localhost` PROCEDURE `P`(
IN `instring` varchar(255)
)
LANGUAGE SQL
NOT DETERMINISTIC
CONTAINS SQL
SQL SECURITY DEFINER
COMMENT ''
begin
declare tempstring varchar(100);
declare outstring varchar(100);
DECLARE VAR_1 VARCHAR(100);
DECLARE VAR_2 VARCHAR(100);
declare checkit int;
DECLARE LIMITOFFSET INT;
set checkit = 0;
SET VAR_2 = instring;
set tempstring = ltrim(rtrim(VAR_2));
SET LIMITOFFSET = 0;
looper: while tempstring is not null and instr(tempstring,',') > 0 do
set outstring = substr(tempstring,1,instr(tempstring, ','));
set tempstring = ltrim(rtrim(replace(tempstring,outstring,'')));
set outstring = replace(outstring,',','');
set checkit = checkit + 1;
insert into oitems
select CHECKIT,10,ID, outstring
from OItemsbase
order by id
LIMIT LIMITOFFSET,1
;
SET LIMITOFFSET = LIMITOFFSET + 1;
end while;
set outstring = tempstring;
set tempstring = ltrim(rtrim(replace(tempstring,outstring,'')));
set outstring = replace(outstring,',','');
set checkit = checkit + 1;
insert into oitems
select CHECKIT,10,ID, outstring
from OItemsbase
order by id
LIMIT LIMITOFFSET,1
;
end //
DELIMITER ;
MariaDB [sandbox]> DROP TABLE IF EXISTS OItemsbase;
Query OK, 0 rows affected (0.11 sec)
MariaDB [sandbox]> CREATE TABLE OItemsbase ( id INT, alpha_id INT, created_at VARCHAR(5));
Query OK, 0 rows affected (0.24 sec)
MariaDB [sandbox]> INSERT INTO OItemsbase VALUES
-> (2, 100, 'today'),
-> (6, 101, 'today'),
-> (10, 101,'today');
Query OK, 3 rows affected (0.02 sec)
Records: 3 Duplicates: 0 Warnings: 0
MariaDB [sandbox]>
MariaDB [sandbox]> drop table if exists oitemss;
Query OK, 0 rows affected, 1 warning (0.00 sec)
MariaDB [sandbox]> create table oitems(id int, example_id int, item_base_id int, quantity int);
ERROR 1050 (42S01): Table 'oitems' already exists
MariaDB [sandbox]>
MariaDB [sandbox]> truncate table oitems;
Query OK, 0 rows affected (0.23 sec)
MariaDB [sandbox]>
MariaDB [sandbox]> CALL P('20,30');
Query OK, 1 row affected (0.04 sec)
MariaDB [sandbox]>
MariaDB [sandbox]> SELECT * FROM Oitems;
+------+------------+--------------+----------+
| id | example_id | item_base_id | quantity |
+------+------------+--------------+----------+
| 1 | 10 | 2 | 20 |
| 2 | 10 | 6 | 30 |
+------+------------+--------------+----------+
2 rows in set (0.00 sec)
关于MYSQL - 插入连接字符串,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/41777065/