查找列依赖项

Question

如何查找依赖于表的特定列的对象.

例如:

表:SomeTable

Cols:col1 pk,col2,col3

我想找到所有依赖于col1的对象(Pk)

Answer 1

@ NoFuchsGavin的脚本通常效果很好,但由于存在问题而有一些限制sysdepends(请参阅Pinal Dave的这篇博客文章,其中给出的结果不正确).

Microsoft还建议您避免sysdepends在新的开发工作中使用.

因此sys.dm_sql_referencing_entities,我们可以使用和这里sys.dm_sql_referenced_entities建议.

但是我注意到这有时会因为referenced_minor_nameNULL 而排除列引用.因此,我添加了另一个可能引入误报的条件,但确保结果集中不会省略列引用.

DECLARE @SchemaName sysname = '{0}';
DECLARE @TableName sysname  = '{1}';
DECLARE @ColumnName sysname = '{2}';

SELECT
    @SchemaName + '.' + @TableName                                      AS [USED_OBJECT],
    @ColumnName                                                         AS [COLUMN],
    referencing.referencing_schema_name + '.' + referencing_entity_name AS USAGE_OBJECT,
    CASE so.type
        WHEN 'C' THEN 'CHECK constraint'
        WHEN 'D' THEN 'Default'
        WHEN 'F' THEN 'FOREIGN KEY'
        WHEN 'FN' THEN 'Scalar function' 
        WHEN 'IF' THEN 'In-lined table-function'
        WHEN 'K' THEN 'PRIMARY KEY'
        WHEN 'L' THEN 'Log'
        WHEN 'P' THEN 'Stored procedure'
        WHEN 'R' THEN 'Rule'
        WHEN 'RF' THEN 'Replication filter stored procedure'
        WHEN 'S' THEN 'System table'
        WHEN 'TF' THEN 'Table function'
        WHEN 'TR' THEN 'Trigger'
        WHEN 'U' THEN 'User table' 
        WHEN 'V' THEN 'View' 
        WHEN 'X' THEN 'Extended stored procedure'
    END                                             AS USAGE_OBJECTTYPE,
    so.[type]                                       AS USAGE_OBJECTTYPEID
FROM sys.dm_sql_referencing_entities
    (
        @SchemaName + '.' + @TableName,
        'object'
    ) referencing
    INNER JOIN sys.objects so 
        ON referencing.referencing_id = so.object_id
WHERE
    EXISTS
    (
        SELECT
            *
        FROM
            sys.dm_sql_referenced_entities
            (
                referencing_schema_name + '.' + referencing_entity_name,
                'object'
            ) referenced
        WHERE
            referenced_entity_name = @TableName
            AND 
            (
                referenced.referenced_minor_name LIKE @ColumnName   
                -- referenced_minor_name is sometimes NULL
                -- therefore add below condition (can introduce False Positives)
                OR
                (
                    referenced.referenced_minor_name IS NULL 
                    AND 
                    OBJECT_DEFINITION
                    (
                         OBJECT_ID(referencing_schema_name + '.' + referencing_entity_name)
                    ) LIKE '%' + @ColumnName + '%'
                )
            )
    )
ORDER BY
    USAGE_OBJECTTYPE,
    USAGE_OBJECT

以上脚本基于@ NoFuchsGavin的回答和此博客文章.

我很想知道是否有人设法找到一种更好的方式,不会引入假阴性或阳性.

Answer 2

尝试这个查询,它会得到一些我认为你正在寻找的结果.
要进行筛选,请在c1.name或c2.name列中搜索该值.
要查找对某列的所有引用,请使用c2.name作为列名,使用OBJECT_NAME(k.referenced_object_id)作为保存c2列的表:)

祝好运!

    select  OBJECT_NAME(k.parent_object_id) as parentTable
          , c1.name as parentColumn
          , OBJECT_NAME(k.referenced_object_id) as referencedTable
          , c2.name as referencedColumn
    from    sys.foreign_keys k
            inner join sys.foreign_key_columns f
              on  f.parent_object_id = k.parent_object_id
              and f.constraint_object_id = k.object_id
            inner join sys.columns c1
              on  c1.column_id = f.parent_column_id
              and c1.object_id = k.parent_object_id
            inner join sys.columns c2
              on  c2.column_id = f.referenced_column_id
              and c2.object_id = k.referenced_object_id
    where   c2.name = 'Column'
    and     OBJECT_NAME(k.referenced_object_id) = 'Table'

Answer 3

这应该工作!

        -- Search in All Objects
SELECT OBJECT_NAME(OBJECT_ID),definition
FROM sys.sql_modules
WHERE definition LIKE '%' + 'ColumnToBeSearched' + '%'
Order by OBJECT_NAME(OBJECT_ID)
GO

-- Search in Stored Procedure Only
SELECT DISTINCT OBJECT_NAME(OBJECT_ID),
object_definition(OBJECT_ID)
FROM sys.Procedures
WHERE object_definition(OBJECT_ID) LIKE '%' + 'ColumnToBeSearched' + '%'
GO

Answer 4

只需替换{0}和{1}!

declare @tbl_nme as varchar(50)
declare @col_nme as varchar(50)
declare @level int
set @level = 1
set @tbl_nme= '{0}' --TableName 
set @col_nme= '{1}' --ColumnName 



select 
  obj.name as obj_nm
, col.name as col_nm
, depobj.name as dep_obj_nm
, CASE depobj.type
     WHEN 'C' THEN 'CHECK constraint'
     WHEN 'D' THEN 'Default'
     WHEN 'F' THEN 'FOREIGN KEY'
     WHEN 'FN' THEN 'Scalar function' 
     WHEN 'IF' THEN 'In-lined table-function'
     WHEN 'K' THEN 'PRIMARY KEY'
     WHEN 'L' THEN 'Log'
     WHEN 'P' THEN 'Stored procedure'
     WHEN 'R' THEN 'Rule'
     WHEN 'RF' THEN 'Replication filter stored procedure'
     WHEN 'S' THEN 'System table'
     WHEN 'TF' THEN 'Table function'
     WHEN 'TR' THEN 'Trigger'
     WHEN 'U' THEN 'User table' 
     WHEN 'V' THEN 'View' 
     WHEN 'X' THEN 'Extended stored procedure'
  END as dep_obj_type 
, null as dep_col_nm
, depobj.type as dep_obj_typeID
, @level as level
into #temp
from   sysobjects obj 
   join   syscolumns col on obj.id = col.id 
   left   join (sysdepends dep join sysobjects depobj on depobj.id = dep.id) 
         on obj.id = dep.depid 
        and col.colid = dep.depnumber 
where  obj.name = @tbl_nme
   and col.name = @col_nme


while (@@rowcount > 0)
begin
set @level = @level + 1
insert into #temp
select 
  obj.name as obj_nm
, col.name as col_nm
, depobj.name as dep_obj_nm
, CASE depobj.type
     WHEN 'C' THEN 'CHECK constraint'
     WHEN 'D' THEN 'Default'
     WHEN 'F' THEN 'FOREIGN KEY'
     WHEN 'FN' THEN 'Scalar function' 
     WHEN 'IF' THEN 'In-lined table-function'
     WHEN 'K' THEN 'PRIMARY KEY'
     WHEN 'L' THEN 'Log'
     WHEN 'P' THEN 'Stored procedure'
     WHEN 'R' THEN 'Rule'
     WHEN 'RF' THEN 'Replication filter stored procedure'
     WHEN 'S' THEN 'System table'
     WHEN 'TF' THEN 'Table function'
     WHEN 'TR' THEN 'Trigger'
     WHEN 'U' THEN 'User table' 
     WHEN 'V' THEN 'View' 
     WHEN 'X' THEN 'Extended stored procedure'
  END as dep_obj_type 
, null as dep_col_nm
, depobj.type as dep_obj_typeID
, @level as level
from   sysobjects obj 
   join   syscolumns col on obj.id = col.id 
   left   join (sysdepends dep join sysobjects depobj on depobj.id = dep.id) 
         on obj.id = dep.depid 
        and col.colid = dep.depnumber 
where  exists(select 1 from #temp a where obj.name = a.dep_obj_nm and 
col.name = a.dep_col_nm and level = @level - 1 and dep_col_nm is not null)
end

select 
   obj_nm AS 'TABLE',
   col_nm AS 'COLUMN',
   dep_obj_nm AS 'USAGE_OBJECT',
   dep_obj_type AS 'USAGE_OBJECTTYPE',
   dep_obj_typeID AS 'USAGE_OBJECTTYPEID'
from #temp
drop table #temp

Answer 5

上面接受的答案中提供的sql 应该包括sys.foreign_keys和sys.foreign_key_columns之间的附加连接条件.见下面以"和"开头的行:

from    sys.foreign_keys k
        inner join sys.foreign_key_columns f
          on  f.parent_object_id = k.parent_object_id
               and f.constraint_object_id = k.object_id

作为参考,这是带有修改连接的整个脚本:

select  OBJECT_NAME(k.parent_object_id) as parentTable
        , c1.name as parentColumn
        , OBJECT_NAME(k.referenced_object_id) as referencedTable
        , c2.name as referencedColumn
from    sys.foreign_keys k
        inner join sys.foreign_key_columns f
            on  f.parent_object_id = k.parent_object_id
            and f.constraint_object_id = k.object_id
        inner join sys.columns c1
            on  c1.column_id = f.parent_column_id
            and c1.object_id = k.parent_object_id
        inner join sys.columns c2
            on  c2.column_id = f.referenced_column_id
            and c2.object_id = k.referenced_object_id
where   c2.name = 'GUID'
and     OBJECT_NAME(k.referenced_object_id) = 'AuthDomain'