Question

表Items

表Sale

最后：表SaleItems

程序PLAYER_CREATE_SALE：

IN参数：

in_player_id int
in_total int
in_items_ids nvarchar（500）
in_items_quantity nvarchar（500）

基本上，＆＃34;用户＆＃34;看到上面的项目列表，选择任何项目，更改金额和购买。这应该像＆＃34; cart＆＃34;。

所以，例如：用户选择炸弹（id：1，数量：10）和齿轮（id：3，数量：2）

我的程序参数如下：

in_player_id: 750

in_total: 390

in_items_ids: "1,3"

in_items_quantity: "10,2"

这实际上是程序的实现方式：

    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，结果final将是：

但数量是错误的。我也不知道如何插入数量。这是应该如何：

Answer 1

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)

Answer 2

我刚刚添加了

SET @squery = CONCAT("INSERT INTO SaleItems(`sale_id`, `item_id`, `quantity`) 
SELECT ", @sale_id, ", id, 9999 FROM Items WHERE id IN (", in_items_ids, ")");

正在插入ID，但数量不足。

MYSQL - 插入连接字符串

2 个答案: