这是我的初始PL/SQL代码:
TYPE VarcharArray IS TABLE OF VARCHAR2(100) INDEX BY BINARY_INTEGER;
我在以下代码中使用它:
PROCEDURE Create(inFatherId IN VARCHAR2, inBarcode IN VarcharArray, inItemId IN VarcharArray)
IS
myCount NUMBER(38);
sampleId_FromDb NUMBER(38);
itemId_FromDb NUMBER(38);
BEGIN
myCount := inBarcode.COUNT;
FOR i IN 1..myCount
LOOP
SELECT ITEM.Id INTO itemId_FromDb FROM ITEM WHERE FatherId = inFatherId AND CampaignItemId = inItemId(i);
SELECT SAMPLE_SEQUENCE.NEXTVAL INTO sampleId_FromDb FROM DUAL;
INSERT INTO CAMPAIGN_SAMPLES(Id, Barcode, ItemId) VALUES(sampleId_FromDb, inBarcode(i), itemId_FromDb);
END LOOP;
END;
我已经看到,可以将数组类型转换为具有表值参数的MS SQL,但是我如何以类似的方式迭代以使我在迭代中包含thee操作?
在当前PL/SQL实现中,我在数组中最多发送50.000个元素,并且性能不错。我也希望在MS SQL中类似的东西。
无需一次循环和插入一行。这只是使您的代码较慢的一种方法。由于表中没有任何订单,因此您需要添加一列来定义订单。您的类型就是这样:
CREATE TYPE VarcharArray AS TABLE(ID int, Item VARCHAR(100));
然后,您可以将过程重写为单个插入语句。
CREATE PROCEDURE SomeProcedure(
@FatherId AS VARCHAR, --This might need a length or will be defaulted to length 1
@Barcode AS VarcharArray READONLY,
@ItemId AS VarcharArray READONLY
)
AS
INSERT INTO CAMPAIGN_SAMPLES(Id, Barcode, ItemId)
SELECT NEXT VALUE FOR SAMPLE_SEQUENCE,
bc.Item,
i.Id
FROM ITEM i
JOIN @ItemId ii ON i.CampaignItemId = ii.Item
JOIN @Barcode bc ON ii.ID = bc.ID
WHERE i.FatherId = @FatherId;
您还可以创建一个具有值的表并防止可能发生的任何订购问题。
CREATE TYPE BarcodeItems AS TABLE(Item VARCHAR(100), Barcode VARCHAR(100));
GO
CREATE PROCEDURE SomeProcedure(
@FatherId AS VARCHAR, --This might need a length or will be defaulted to length 1
@BarcodeItems AS BarcodeItems READONLY
)
AS
INSERT INTO CAMPAIGN_SAMPLES(Id, Barcode, ItemId)
SELECT NEXT VALUE FOR SAMPLE_SEQUENCE,
bi.Item,
i.Id
FROM ITEM i
JOIN @BarcodeItems bi ON i.CampaignItemId = bi.Item
WHERE i.FatherId = @FatherId;