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做程序有时候，要判断某列是否属于操作表，对比有些烦就写了一个存储过程。
create proc Pr_getTableColumnLen
(
--传入的表名和列名
@inTableName varchar(20),
@inColumnName varchar(20),
--传入的标志变量和内容变量
@lenContent varchar(200),
@flag varchar(1)
)
as
--内部变量
declare
@rColumnName varchar(20),
@rColumnType varchar(10),
@rColumnByte int,
@rColumnNullStatus varchar(1),
@rTemp varchar(10),
@rTempStr varchar(100)
--start1
--如果存在判断存入数据是否合格
--查找当前列，是否存在
SELECT @rTemp=len(COLUMNPROPERTY( OBJECT_ID(@inTableName),@inColumnName,'PRECISION'))
if(@rTemp > 0)
begin
select @rColumnName=a.name from syscolumns a,systypes b where a.id =object_id(@inTableName) and a.xtype = b.xtype and a.name=@inColumnName
select @rColumnNullStatus=case a.isnullable when 1 then 'Y' else 'N' end from syscolumns a,systypes b where a.id =object_id('publicnotice') and a.xtype = b.xtype and a.name=@inColumnName
select @rColumnType=b.name from syscolumns a,systypes b where a.id =object_id(@inTableName) and a.xtype = b.xtype and a.name=@inColumnName
select @rColumnByte=a.length from syscolumns a,systypes b where a.id =object_id(@inTableName) and a.xtype = b.xtype and a.name=@inColumnName
--‘H’是中文判断
if(upper(@flag) ='H')
begin
if(len(@lenContent) > @rColumnByte/2)
begin
set @rTempStr = ('出错提示:列('+ @rColumnName + ') 类型是 ' + @rColumnType + ' 可存储(' + cast(@rColumnByte/2 as varchar(10)) + ')个汉字' + ' 可否为空 ' + @rColumnNullStatus)
end
else
begin
set @rTempStr = 'Y'
end
end
else
--其他默认为英文
begin
if(len(@lenContent) > @rColumnByte)
begin
set @rTempStr = ('出错提示:列('+ @rColumnName + ') 类型是(' + @rColumnType + ') 可存储(' + cast(@rColumnByte as varchar(10)) + ')个字符' + ' 可否为空(' + @rColumnNullStatus + ')')
end
else
begin
set @rTempStr = 'Y'
end
end
end
else
begin
set @rTempStr =( '(' + @inColumnName + ') 是无效列')
end
--start1End
--start2,用临时表得到数据
create table #temTable (result varchar(100))
insert into #temTable values(@rTempStr)
select * from #temTable
--start2End
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