存储过程过滤

Question

需要编写一个过程来检索数据，如果用户没有输入值，某些选择标准未被采纳到过程中。我过滤：

WHERE @ts = [ts] or @username = [username] 
or @ip = [ip] or @my_category = [my_category] 
or @my_name = [my_name] or @nm1_name = [nm1_name] 
or @param = [param] or @short_descr = [short_descr] 

当我调用存储过程，并通过其中的一个参数时过滤的作品，当我写了一些，只有一个过滤工作（因为我有我的逻辑“或”）。取而代之的是'和'不必要的不​​必要的必须通过所有的参数，我只需要传输我想过滤掉的那些参数。请帮我解决这个问题

Answer 1

当你不使用相关的过滤器时，你将参数设置为NULL，对吗？在这种情况下

WHERE isnull(@ts, [ts]) = [ts] 
and isnull(@username, [username]) = [username] 
and isnull(@ip, [ip]) = [ip] 
and isnull(@my_category, [my_category]) = [my_category] 
and isnull(@my_name, [my_name]) = [my_name] 
and isnull(@nm1_name, [nm1_name]) = [nm1_name] 
and isnull(@param, [param]) = [param] 
and isnull(@short_descr, [short_descr]) = [short_descr] 
option (recompile) 

我提倡用选项（重新编译）

编辑：

所以，你可以使用这样的查询

与 ''，而不是NULL

WHERE @ts in ('', [ts]) 
and @username in ('', [username]) 
and @ip in ('', [ip]) 
and @my_category in ('', [my_category]) 
and @my_name in ('', [my_name]) 
and @nm1_name in ('', [nm1_name]) 
and @param in ('', [param]) 
and @short_descr in ('', [short_descr]) 

（不是使用或每一次更具可读性和它不需要重新编译*）

（*）作为参数不会反正嗅

Answer 2

WHERE (@ts IS NULL OR [ts] = @ts) 
and (@username IS NULL OR [username] = @username) 
and (@ip IS NULL OR [ip] = @ip) 
and (@my_category IS NULL OR [my_category] = @my_category) 
and (@my_name IS NULL OR [my_name] = @my_name) 
and (@nm1_name IS NULL OR [nm1_name] = @nm1_name) 
and (@param IS NULL OR [param] = @param) 
and (@short_descr IS NULL OR [short_descr] = @short_descr) 

编辑：

我在其他答案的评论中，您看到的是传递空白字符串而不是NULL。在这种情况下，你需要处理它们（或除此之外）为空

WHERE (@ts IS NULL OR @ts = '' OR [ts] = @ts) 
and (@username IS NULL OR @username = '' OR [username] = @username) 
and (@ip IS NULL OR @ip = '' OR [ip] = @ip) 
and (@my_category IS NULL OR @my_category = '' OR [my_category] = @my_category) 
and (@my_name IS NULL OR @my_name = '' OR [my_name] = @my_name) 
and (@nm1_name IS NULL OR @nm1_name = '' OR [nm1_name] = @nm1_name) 
and (@param IS NULL OR @param = '' OR [param] = @param) 
and (@short_descr IS NULL OR @short_descr = '' OR [short_descr] = @short_descr)