change column type in mssql

當我們要更改sql server中某個table的column類型時， 爲了評估關聯的table/view/sp/function(object type分別是U/V/P/FN/IF)中受影響的部分， 可以用如下sql檢視需要review的對象。

declare @columnName sysname='WONum'
declare @columnLength int=20
select o.type as object_type,'['+SCHEMA_NAME(o.schema_id)+'].['+o.name+']' AS Schema_ObjectName, o.object_id
    ,sc.name as Column_name, sc.length as Column_Length
    from syscolumns sc
    join sys.objects o on sc.id=o.object_id
    where sc.name in ('@'+@columnName,@columnName) and sc.length<=@columnLength
    order by o.type,Schema_ObjectName