Question

我已经创建了一个SQL脚本来循环抛出数据库并创建一个函数（该函数的目的是将RTF转换为纯文本）。我将函数创建的脚本放在变量上，然后尝试使用exec命令执行它。

我使用了While循环，并将请求放置在varchar变量上，然后exec @command

但我收到此错误：

declare @Total as int

select @Total = count(*) from Temp1
declare @counter as int
set @counter = 1

declare @CurrentVal as varchar(max)
declare @command varchar(max)

while (@counter <= @Total)
begin 

select @CurrentVal = name from Temp1 where RowId = @counter
set @command=' use '+@CurrentVal+'
GO
CREATE FUNCTION dbo.fnParseTEXTRTF
(
@rtf VARCHAR(max)
)
RETURNS VARCHAR(max)
AS
BEGIN


DECLARE @Stage TABLE
(
Chr CHAR(1),
Pos INT
)

INSERT @Stage
(
Chr,
Pos
)
SELECT SUBSTRING(@rtf, Number, 1),
Number
FROM master..spt_values
WHERE Type = ''p''
AND SUBSTRING(@rtf, Number, 1) IN (''{'', ''}'')

DECLARE @Pos1 INT,
@Pos2 INT

SELECT @Pos1 = MIN(Pos),
@Pos2 = MAX(Pos)
FROM @Stage

DELETE
FROM @Stage
WHERE Pos IN (@Pos1, @Pos2)

WHILE 1 = 1
BEGIN
SELECT TOP 1 @Pos1 = s1.Pos, @Pos2 = s2.Pos
FROM @Stage AS s1
INNER JOIN @Stage AS s2 ON s2.Pos > s1.Pos
WHERE s1.Chr = ''{''
AND s2.Chr = ''}''
ORDER BY s2.Pos - s1.Pos

IF @@ROWCOUNT = 0
BREAK

DELETE
FROM @Stage
WHERE Pos IN (@Pos1, @Pos2)

UPDATE @Stage
SET Pos = Pos - @Pos2 + @Pos1 - 1
WHERE Pos > @Pos2

SET @rtf = STUFF(@rtf, @Pos1, @Pos2 - @Pos1 + 1, '''')
END

SET @Pos1 = PATINDEX(''%\cf[0123456789][0123456789 ]%'', @rtf)

WHILE @Pos1 > 0
SELECT @Pos2 = CHARINDEX('' '', @rtf, @Pos1 + 1), @rtf = STUFF(@rtf, @Pos1, @Pos2 - @Pos1 + 1, ''''), @Pos1 = PATINDEX(''%\cf[0123456789][0123456789 ]%'', @rtf)

SELECT @rtf = REPLACE(@rtf, ''\pard'', ''''), @rtf = REPLACE(@rtf, ''\par'', ''''), @rtf = case when LEN(@rtf)>0 then LEFT(@rtf, LEN(@rtf) - 1) else @rtf end

SELECT @rtf = REPLACE(@rtf, ''\b0 '', ''''), @rtf = REPLACE(@rtf, ''\b '', '''')

SELECT @rtf = STUFF(@rtf, 1, CHARINDEX('' '', @rtf), '''')


RETURN @rtf
end'
set @counter = @counter + 1  
exec  @command
end

Answer 1

据我了解，函数正确，这是跨多个数据库执行函数创建语句的主要问题。 GO不能在这里使用，它不是sql，它是客户端执行范围内所有语句的指令不幸的是，不能使用[DatabaseName]。[schema]。[FuncName]在当前数据库中创建函数。我可以提出这样的技术来解决问题，仅以代码为例

declare @funccode nvarchar(4000);
set @funccode='CREATE FUNCTION [dbo].[fntest]
(
)
RETURNS int
AS
BEGIN
    RETURN 1
END;'

declare @dbname nvarchar(100)='TestDatabase'

declare @statement nvarchar(max) ='use '+@dbname+';
exec (@func);'

exec sp_executesql  @stmt = @statement,@params=N'@func nvarchar(4000)',@func=@funccode;

想法-在已经设置了当前数据库的情况下，在exec语句内切换当前数据库并调用新的exec语句

尝试在数据库中循环并创建函数时出现SQL错误

1 个答案: