sql server 2008 - SQL parameter in where clause that allows for all, specific, or multiple values -

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in sql server 2008 need able pass in parameter allows values, specific values, or multiple values. below sql works fine when parameter "all". , works fine single value. multiple values "msg 4145, level 15, state 1, line 7 expression of non-boolean type specified in context condition expected, near ','." i've tried number of things not getting it.

--works fine  declare @sql varchar(8000)  ,@p_code varchar(100)  ,@v_code varchar(100)  set @p_code = ('''all''')  set @v_code = @p_code  select @sql = 'select distinct  	code  	from	table   	where	'+@v_code+' in ('+'''all'''+')  		or code in ('+@v_code+')'  execute (@sql)  --returns records	  	  	  --works fine		  declare @sql varchar(8000)  ,@p_code varchar(100)  ,@v_code varchar(100)  set @p_code = ('''abcd''')  set @v_code = @p_code  select @sql = 'select distinct  	code  	from	table   	where	'+@v_code+' in ('+'''all'''+')  		or code in ('+@v_code+')'  execute (@sql)		  --returns records abcd      --returns error noted  declare @sql varchar(8000)  ,@p_code varchar(100)  ,@v_code varchar(100)  set @p_code = ('''abcd'',''efgh''')  set @v_code = @p_code  select @sql = 'select distinct  	code  	from	table   	where	'+@v_code+' in ('+'''all'''+')  		or code in ('+@v_code+')'  execute (@sql)

the left side of in should expression, code made not, is:

select distinct     code        table        'abcd','efgh' in ('all')         or code in ('abcd','efgh')

which can see first in has problem not second.

you need change code logic like:

declare @sql varchar(8000) ,@v_code varchar(100) select @sql = 'select distinct     code        table      ' + case when @v_code null '' else ' code in ('+@v_code+')' end  execute (@sql)

and believe there better way perform this. if collection big in may cause performance issue.


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