php - 将 SELECT 语句结果传递给 StoredProc 以进行临时表连接

Question

我正在尝试从 DB-Server-1 中的一个表中获取数据，并将其传递给正在 DB-SERVER-2 上执行的 StoredProcedure（从 DB-Server-1 连接到此数据）。

所以，我在不同的服务器上有 2 个表：

1. DB-Server-1：tblItem

   -------------------
   item_id | item_qty 
   -------------------
    1231   | 2
    1232   | 4
   -------------------
   

2. DB-Server-2：tblItemDetails

   ----------------------------------------
   item_detail_id | item_id | item_data
   ----------------------------------------
    1             | 1231    |  TEST_DATA_1
    2             | 1232    |  TEST_DATA_2
   ----------------------------------------
   

现在我想从 DB-Server-1 获取数据（基本选择查询）

SELECT item_id, item_qty
FROM tblItem
WHERE item_id IN (1231, 1232);

并将其传递给存储过程：spSetItemQuantityInItemDetails

CREATE PROCEDURE [dbo].[spUpdatePOCartons]
(
 @valueList VARCHAR(MAX)
)
.
.
-- Now trying to split string and create a temp table
-- This temp table will later be used in the SP to join with tblItemDetails to set item_qty

DECLARE @temp TABLE (
item_id int,
item_qty int
);

DECLARE @pos1 INT
DECLARE @len1 INT
DECLARE @value1 varchar(8000)

DECLARE @pos2 INT
DECLARE @len2 INT
DECLARE @value2 varchar(8000)

SET @valueList = '1,4;2,5;3,14;';

set @pos1 = 0
set @len1 = 0

WHILE CHARINDEX(';', @valueList, @pos1+1)>0
    BEGIN
        set @len1 = CHARINDEX(';', @valueList, @pos1+1) - @pos1
        set @value1 = SUBSTRING(@valueList, @pos1, @len1)
        --SELECT @pos, @len, @value /*this is here for debugging*/

        PRINT @value1;
        -----------

            set @pos2 = 0
            set @len2 = 0

            WHILE CHARINDEX(',', @value1, @pos2+1)>0
                BEGIN
                    set @len2 = CHARINDEX(',', @value1, @pos2+1) - @pos2
                    set @value2 = SUBSTRING(@value1, @pos2, @len2)
                    --SELECT @pos, @len, @value /*this is here for debugging*/

                    PRINT @value2;
                    set @pos2 = CHARINDEX(',', @value1, @pos2+@len2) +1
                END

        ------------
        set @pos1 = CHARINDEX(';', @valueList, @pos1+@len1) +1
    END

问题

我试图了解上述解决方案是否最接近可行的方法（目前它不会拆分不以 ; 或 , 结尾的字符串的最后一个值）或者是否有更好的方法

标签： phpsqlsql-serverstored-procedures

Answer 1

我认为更好的方法可能是将表变量直接传递给存储过程。为此，您必须创建一个为输入表创建结构的类型。我在下面重新创建了这个场景。让我知道您是否可以使用它来实现您的目标。

--Create test tables
CREATE TABLE dbo.tblItem (item_id int, item_qty int);
CREATE TABLE dbo.tblItem2 (item_detail_id int, item_id int, item_details varchar(50));
GO

--Create the type that can be used as input
CREATE TYPE TableForInput as TABLE
(
    Item_Id int,
    Item_Qty int
);

GO 

--Create/alter the stored procedure
CREATE PROCEDURE dbo.usp_GetCardData
@Input TableForInput READONLY
AS
BEGIN 
    SELECT * FROM dbo.tblItem2 as t2 INNER JOIN @Input as i ON t2.Item_id = i.Item_id
END

GO

--Insert dummy data into the test tables
INSERT INTO dbo.tblItem values (1231, 2), (1232, 4);
INSERT INTO dbo.tblItem2 VALUES (1, 1231, 'TEST_1'), (2, 1232, 'TEST2')

-- The below would mimic the client side.
-- Declare a local temporary table, select data into it
--      And then pass this as a parameter to the stored proc
DECLARE @Data TableForInput;

INSERT INTO @Data
SELECT * FROM dbo.tblItem;


exec dbo.usp_GetCardData @Data