Question

我称之为标量函数

import UIKit
import PlaygroundSupport

class MyViewController : UIViewController {

    override func loadView() {
        let view = UIView()
        view.backgroundColor = .white
        self.view = view

        // vertical stack view (full screen)
        let stackView = UIStackView()
        stackView.translatesAutoresizingMaskIntoConstraints = false
        stackView.axis = .vertical
        stackView.alignment = .center

        view.addSubview(stackView)

        NSLayoutConstraint.activate([
            stackView.centerXAnchor.constraint(equalTo: view.centerXAnchor),
            stackView.topAnchor.constraint(equalTo: view.topAnchor),
            ])

        // view (100x100)
        let fixedSizeBlueView = UIView()
        fixedSizeBlueView.translatesAutoresizingMaskIntoConstraints = false
        fixedSizeBlueView.backgroundColor = .blue

        stackView.addArrangedSubview(fixedSizeBlueView)

        NSLayoutConstraint.activate([
            fixedSizeBlueView.widthAnchor.constraint(equalToConstant: 100),
            fixedSizeBlueView.heightAnchor.constraint(equalToConstant: 100),
            ])

        // view (100x100)
        let fixedSizeRedView = UIView()
        fixedSizeRedView.translatesAutoresizingMaskIntoConstraints = false
        fixedSizeRedView.backgroundColor = .red

        stackView.addArrangedSubview(fixedSizeRedView)

        NSLayoutConstraint.activate([
            fixedSizeRedView.widthAnchor.constraint(equalToConstant: 100),
            fixedSizeRedView.heightAnchor.constraint(equalToConstant: 100),
            ])

    }
}
// Present the view controller in the Live View window
PlaygroundPage.current.liveView = MyViewController()

在此存储过程中

CREATE FUNCTION dbo.TryConvertInt(@Value varchar(200))
RETURNS INT
AS
BEGIN
    SET @Value = REPLACE(@Value, ',', '')

    IF ISNUMERIC(@Value + 'e0') = 0 
       RETURN NULL

    IF (CHARINDEX('.', @Value) > 0 AND CONVERT(bigint, PARSENAME(@Value, 1)) <> 0) 
       RETURN NULL

    DECLARE @I bigint = CASE
                           WHEN CHARINDEX('.', @Value) > 0 
                              THEN CONVERT(bigint, PARSENAME(@Value, 2))
                              ELSE CONVERT(bigint, @Value)
                        END

    IF ABS(@I) > 2147483647 
        RETURN NULL

    RETURN @I
END
GO

我得到了错误

找不到“ dbo”列或用户定义的函数或聚合“ TryConvertInt”，或者名称不明确

我发现了类似的问题，但他们的答案没有帮助，或者我不知道有什么问题

Answer 1

问题是tb_Items_Master.item_auto_code = select dbo.TryConvertInt(@identifier)。不确定这是标量函数还是表值函数。我假设是前者，但我将发布您如何引用两者：

标量函数

tb_Items_Master.item_auto_code = dbo.TryConvertInt(@identifier)

表值函数

tb_Items_Master.item_auto_code = (SELECT dbo.TryConvertInt(@identifier))

或

--In your `FROM` clause
CROSS APPLY dbo.TryConvertInt(@identifier) TCI
WHERE ...
   OR tb_Items_Master.item_auto_code = TCI.[column name] --I don't know what the name of the column returned it
                                                         --So you'll need to amend that

但是，该函数隐含，其名称是试图将varchar转换为int并且不会失败的函数？在SQL Server中已经有一个名为TRY_CONVERT的函数，因此您可以这样做：

tb_Items_Master.item_auto_code = TRY_CONVERT(int,@identifier)

找不到列“ dbo”或用户定义的函数或聚合“ TryConvertInt”，或者名称不明确

1 个答案: