如何在存储过程的IN过滤器内将nvarchar转换为int

Question

我有一个存储过程来生成一个文本文件,其中有一个有很多过滤器,就在这里

-- =============================================
-- Author:      Ricardo Ríos
-- Create date: 17/01/2014
-- Description: Genera el TXT para Importar a Saint
-- =============================================
ALTER PROCEDURE [dbo].[SP_SAINT_TXT]
    -- Add the parameters for the stored procedure here
        (   
        @nomina VARCHAR(MAX),
        @gerencia VARCHAR(MAX),
        @sucursal VARCHAR(MAX),
        @empresa VARCHAR(MAX),
        @departamento VARCHAR(MAX),
        @cargo VARCHAR(MAX),
        @horario VARCHAR(MAX),
        @locacion VARCHAR(MAX),
        @empleados VARCHAR(MAX),
        @desde DATETIME,
        @hasta DATETIME
        )
AS
BEGIN

SET NOCOUNT ON;

DECLARE @cedula varchar(max), @exnocturnas DECIMAL(5,2),
@diast DECIMAL(5,2), @diasf DECIMAL(5,0), @diasd DECIMAL(5,2),
@matut DECIMAL(5,2), @vespe DECIMAL(5,2), @noctu DECIMAL(5,2),
@linea varchar(max), @txt varchar(max),  
@l1 varchar(max),
@l2 varchar(max),
@l3 varchar(max),
@l4 varchar(max),
@l5 varchar(max),
@l6 varchar(max),
@l7 varchar(max)
SET @txt = ''

SET @nomina = (SELECT REPLACE(@nomina, '(', ''))
SET @nomina = (SELECT REPLACE(@nomina, ')', ''))
SET @gerencia = (SELECT REPLACE(@gerencia, '(', ''))
SET @gerencia = (SELECT REPLACE(@gerencia, ')', ''))
SET @sucursal = (SELECT REPLACE(@sucursal, '(', ''))
SET @sucursal = (SELECT REPLACE(@sucursal, ')', ''))
SET @empresa = (SELECT REPLACE(@empresa, '(', ''))
SET @empresa = (SELECT REPLACE(@empresa, ')', ''))
SET @departamento = (SELECT REPLACE(@departamento, '(', ''))
SET @departamento = (SELECT REPLACE(@departamento, ')', ''))
SET @cargo = (SELECT REPLACE(@cargo, '(', ''))
SET @cargo = (SELECT REPLACE(@cargo, ')', ''))
SET @locacion = (SELECT REPLACE(@locacion,'(',''))
SET @locacion = (SELECT REPLACE(@locacion,')',''))
SET @empleados = (SELECT REPLACE(@empleados,'(',''))
SET @empleados = (SELECT REPLACE(@empleados,')',''))

    declare cursor_txt cursor for
    SELECT B.ID AS cedula, 
    SUM(A.extrasnocturnas) AS extrasnocturnas, 
    SUM(A.diastrabajados) AS diastrabajados, 
    SUM(A.diasfaltantes) AS diasfaltantes, 
    SUM(A.diasdescanso) AS diasdescanso, 
    SUM(A.maturinas) AS maturinas, 
    SUM(A.vespertinas) AS vespertinas, 
    SUM(A.nocturnas) AS nocturnas
    FROM exsaint A
    RIGHT JOIN tabela B ON A.cedula = B.ID
    WHERE A.desde >= @desde AND A.hasta <= @hasta
    AND B.tipo_nomina IN (CASE WHEN @nomina = '-1' THEN B.tipo_nomina ELSE @nomina END)
    AND B.gerencia IN (CASE WHEN @gerencia = '-1' THEN B.gerencia ELSE @gerencia END)
    AND B.sucursal IN (CASE WHEN @sucursal = '-1' THEN B.sucursal ELSE @sucursal END)
    AND B.empresa IN (CASE WHEN @empresa = '-1' THEN B.empresa ELSE @empresa END)
    AND B.departamento IN (CASE WHEN @departamento = '-1' THEN B.departamento ELSE @departamento END)
    AND B.cargo IN (CASE WHEN @cargo = '-1' THEN B.cargo ELSE @cargo END)
    AND B.locacion IN (CASE WHEN @locacion = '-1' THEN B.locacion ELSE @locacion END)
    AND B.ID IN (CASE WHEN @empleados = '-1'THEN B.ID ELSE @empleados END)
    GROUP BY ID
    ORDER BY ID
    open cursor_txt
        fetch next from cursor_txt into @cedula, @exnocturnas, @diast, @diasf, @diasd, @matut, @vespe, @noctu

        while @@fetch_status = 0
        begin
            SET @linea = ''
            SET @l1 = CAST(@exnocturnas AS CHAR(8))
            SET @l2 = CAST(@diast AS CHAR(8))
            SET @l3 = CAST(@diasf AS CHAR(3))
            SET @l4 = CAST(@diasd AS CHAR(8))
            SET @l5 = CAST(@matut AS CHAR(8))
            SET @l6 = CAST(@vespe AS CHAR(8))
            SET @l7 = CAST(@noctu AS CHAR(8))
            SET @linea = 
                LTRIM(CONVERT(CHAR(16),@cedula)) +  
                LTRIM(RTRIM((SELECT CONVERT(VARCHAR(10), @hasta, 103) AS [DD/MM/YYYY]))) + 
                LTRIM(RTRIM('000')) + 
                LTRIM(RTRIM(REPLICATE('0', 8-LEN(@l1)) + @l1 )) +
                LTRIM(RTRIM(REPLICATE('0', 8-LEN(@l2)) + @l2 )) +
                LTRIM(RTRIM(REPLICATE('0', 3-LEN(@l3)) + @l3 )) + 
                LTRIM(RTRIM(REPLICATE('0', 8-LEN(@l4)) + @l4 )) +
                LTRIM(RTRIM(REPLICATE('0', 8-LEN(@l5)) + @l5 )) +
                LTRIM(RTRIM(REPLICATE('0', 8-LEN(@l6)) + @l6 )) +
                LTRIM(RTRIM(REPLICATE('0', 8-LEN(@l7)) + @l7 )) +
                LTRIM(RTRIM('00000000')) +
                + CHAR(13) + CHAR(10);
            PRINT @txt
            PRINT @linea
            SET @txt = @txt + @linea
            fetch next from cursor_txt into @cedula, @exnocturnas, @diast, @diasf, @diasd, @matut, @vespe, @noctu
        end
    close cursor_txt
    deallocate cursor_txt

    SELECT @txt

END

问题是当我将一些值传递给IN过滤器时,我得到了这个错误.

[Microsoft] [ODBC SQL Server驱动程序] [SQL Server]将varchar值"5,4"转换为数据类型int时转换失败.

当我执行如下所示的存储过程时.

EXECUTE SP_SAINT_TXT '-1', '-1', '-1', '( 5 , 4 )', '-1', '-1', '-1', '-1', '-1', '20140801', '20150802'   

有没有办法可以添加一些转换或其他东西的过滤器,它有效吗？

Answer 1

CASE根据这篇文章IN,这个任务的内部语句似乎不可能,因为CASE只能返回标量值.此外,SQL Server无法自然地处理逗号分隔值.如果您能够将参数更改为更合适的数据类型(如表参数),那么这将是最终的解决方案.

否则,您可以尝试在此处为此任务实施一些可能的解决方法.这个基于@CeejeeB的回答.更改SQL的这一部分..:

AND B.empresa IN (CASE WHEN @empresa = '-1' THEN B.empresa ELSE @empresa END)

..到这个:

AND (
     @empresa = '-1' 
        or 
     B.empresa IN (SELECT t.id.value('.', 'int') id FROM @empresaXml.nodes('//s') as t(id))
    )

以上语句始终评估为何True时@empresa = '-1'.否则,int将从@empresaXml变量中提取值,并将其用于过滤列empresa.

@empresaXml它自我声明和填充的变量如下:

DECLARE @empresaXml XML
SET @empresaXml = CAST('<s>' + REPLACE(@empresa, ',', '</s><s>') + '</s>' AS XML)

SQL小提琴演示:

CREATE TABLE MyTable(empresa int, data varchar(10))
;

INSERT INTO MyTable
VALUES
  (1,'a'),
  (2,'b'),
  (3,'c'),
  (4,'d'),
  (5,'e')
;

Declare @empresa varchar(50) = '( 5 , 4 )'
DECLARE @empresaXml XML

SET @empresa = REPLACE(REPLACE(@empresa,'(',''), ')', '')
SET @empresaXml = CAST('<s>' + REPLACE(@empresa, ',', '</s><s>') + '</s>' AS XML)

SELECT *
FROM MyTable B
WHERE (@empresa = '-1' or B.empresa IN (SELECT t.id.value('.', 'int') id
                          FROM @empresaXml.nodes('//s') as t(id)))

输出:

| empresa | data |
|---------|------|
|       4 |    d |
|       5 |    e |