sql-server - TRY_PARSE 使函数非确定性

Question

我想让计算列持久化，但 TRY_PARSE 使我的函数变得非确定性。我可以用它做点什么吗？有替代品吗？

CREATE FUNCTION [dbo].[F] 
(
    @input nvarchar(100)
)
RETURNS int
WITH SCHEMABINDING
AS
BEGIN
    return TRY_PARSE(@input as INT)
END


SELECT OBJECTPROPERTY(OBJECT_ID('[dbo].[F]'), 'IsDeterministic')

Answer 1

改用TRY_CONVERT:

CREATE FUNCTION [dbo].[F] 
(
    @input nvarchar(100)
)
RETURNS int
WITH SCHEMABINDING
AS
BEGIN
    return TRY_CONVERT(INT,@input)
END


SELECT OBJECTPROPERTY(OBJECT_ID('[dbo].[F]'), 'IsDeterministic')