powerdesigner逆向工程生成PDM時的列註釋解決方案

在用powerdesigner逆向工程生成PDM時，列註釋(ColumnComment)始終無法生成，歷經數小時的探索，找到一個折衷的方法，現分享如下。並希望有高手指點更好的方法。

邀月使用的是Powerdesigner 15.2，數據庫爲SQL Server 2008 r2

方法如下：

1、在PowerDesigner界面－File-Reverse Engineer－Database,然後選擇一個DBMS,我這裏選取一個由系統默認的SQL Server 2008 DBMS修改而來的SQL_2008_MyDefine。

選好odbc，輸入正確的連接串，選擇數據庫及表。

生成效果：Name爲英文，且Comment列爲空。

而我們希望的是Name列爲中文，Comment爲中文。

查看了下在線幫助，發現在SQL_2008_MyDefine::Script\Objects\Column\SqlListQuery下的Value值如下：

 

{OWNER, TABLE, S, COLUMN, DTTPCODE, LENGTH, SIZE, PREC, COMPUTE, NOTNULL, IDENTITY, DOMAIN, DEFAULT, ExtIdentitySeedInc, COMMENT, ExtCollation, ExtIdtNotForReplication, ExtDeftConstName, Sparse, FileStream, ExtRowGuidCol}

select
u.name,
o.name,
c.column_id,
c.name,
case when c.system_type_id in (165, 167, 231) and c.max_length = -1 then t.name + '(Max)' else t.name end,
c.precision,
case (c.max_length) when -1 then 0 else case when c.system_type_id in (99, 231, 239) then (c.max_length/2) else (c.max_length) end end as colnA,
c.scale,
case(c.is_computed) when 1 then convert(varchar(8000), (select z.definition from [%CATALOG%.]sys.computed_columns z where z.object_id = c.object_id and z.column_id = c.column_id)) else '' end as colnB,
case(c.is_nullable) when 1 then 'NULL' else 'NOTNULL' end,
case(c.is_identity) when 1 then 'identity' else '' end,
case when(c.user_type_id <> c.system_type_id) then (select d.name from [%CATALOG%.]sys.types d where d.user_type_id = c.user_type_id) else '' end as colnC,
convert(varchar(8000), d.definition),
case (c.is_identity) when 1 then convert(varchar, i.seed_value) + ', ' + convert(varchar, i.increment_value) else '' end as colnD,
(select convert(varchar(8000), value) from ::fn_listextendedproperty(NULL, 'user', u.name, 'table', o.name, 'column', c.name) where name = 'MS_Description') as colnE,
c.collation_name,
case (i.is_not_for_replication) when 1 then 'true' else 'false' end,
d.name,
case(c.is_sparse) when 1 then 'true' else 'false' end,
case(c.is_filestream) when 1 then 'true' else 'false' end,
case(c.is_rowguidcol) when 1 then 'true' else 'false' end
from
[%CATALOG%.]sys.columns c
join [%CATALOG%.]sys.objects o on (o.object_id = c.object_id)
join [%CATALOG%.]sys.schemas u on (u.schema_id = o.schema_id)
join [%CATALOG%.]sys.types t on (t.user_type_id = c.system_type_id)
left outer join [%CATALOG%.]sys.identity_columns i on (i.object_id = c.object_id and i.column_id = c.column_id)
left outer join [%CATALOG%.]sys.default_constraints d on (d.object_id = c.default_object_id)
where
o.type in ('U', 'S', 'V')
[ and u.name = %.q:OWNER%]
[ and o.name=%.q:TABLE%]
order by 1, 2, 3

注意該值中上面是PDM對應的列名，下面是從SQL數據庫中取到的相關屬性值。其中“

(select convert(varchar(8000), value) from 
::fn_listextendedproperty(NULL, 'user', u.name, 'table', o.name, 'column', c.name) 
where name = 'MS_Description') as colnE, 

”是可以取到Comment值的，可是生成的PDM爲什麼Comment列爲空呢？嘗試修改該SQL語句，將語句提取出來，也可以獲取結果：

select
u.name,
o.name,
c.column_id,
c.name,
case when c.system_type_id in (165, 167, 231) and c.max_length = -1 then t.name + '(Max)' else t.name end,
c.precision,
case (c.max_length) when -1 then 0 else case when c.system_type_id in (99, 231, 239) then (c.max_length/2) else (c.max_length) end end as colnA,
c.scale,
case(c.is_computed) when 1 then convert(varchar(8000), (select z.definition from sys.computed_columns z where z.object_id = c.object_id and z.column_id = c.column_id)) else '' end as colnB,
case(c.is_nullable) when 1 then 'NULL' else 'NOTNULL' end,
case(c.is_identity) when 1 then 'identity' else '' end,
case when(c.user_type_id <> c.system_type_id) then (select d.name from sys.types d where d.user_type_id = c.user_type_id) else '' end as colnC,
convert(varchar(8000), d.definition),
case (c.is_identity) when 1 then convert(varchar, i.seed_value) + ', ' + convert(varchar, i.increment_value) else '' end as colnD,
(select convert(varchar(8000), value) from ::fn_listextendedproperty(NULL, 'user', u.name, 'table', o.name, 'column', c.name) where name = 'MS_Description') as colnE,
c.collation_name,
case (i.is_not_for_replication) when 1 then 'true' else 'false' end,
d.name,
case(c.is_sparse) when 1 then 'true' else 'false' end,
case(c.is_filestream) when 1 then 'true' else 'false' end,
case(c.is_rowguidcol) when 1 then 'true' else 'false' end
from
sys.columns c
join sys.objects o on (o.object_id = c.object_id)
join sys.schemas u on (u.schema_id = o.schema_id)
join sys.types t on (t.user_type_id = c.system_type_id)
left outer join sys.identity_columns i on (i.object_id = c.object_id and i.column_id = c.column_id)
left outer join sys.default_constraints d on (d.object_id = c.default_object_id)
where
o.type in ('U', 'S', 'V')
and u.name =N'dbo'
and o.name=N'Age'
order by 1, 2, 3

後來發現，直接用生成表的SQL，而不是用數據庫就可以生成註釋。如下圖：

但字段類型全亂了。

難道Powerdesigner真的這麼弱嗎？google了一下，看到官方文檔：

http://manuals.sybase.com/onlinebooks/group-pd/pdd1100e/advanced/@Generic__BookTextView/1302;hf=0

裏面有關於SqlListQuery的解釋。

再看看上面的SQL語句，突然想到，既然可以在SQL查詢出結果，那麼出錯一定在生成PDM的時候，

在SQL_2008_MyDefine::Script\Objects\Column中看到這麼一段:

The following system variables are available:
(parent table items are also available for columns)
   "COLNNAME"     // name of the column
   "COLNCODE"     // code of the column

將上面的Value值中上面的一行中“Comment”修改爲“COLNNAME”會如何？即

{OWNER, TABLE, S, COLUMN, DTTPCODE, LENGTH, SIZE, PREC, COMPUTE, NOTNULL, IDENTITY, DOMAIN, DEFAULT, ExtIdentitySeedInc, COMMENT, ExtCollation, ExtIdtNotForReplication, ExtDeftConstName, Sparse, FileStream, ExtRowGuidCol}改爲

{OWNER, TABLE, S, COLUMN, DTTPCODE, LENGTH, SIZE, PREC, COMPUTE, NOTNULL, IDENTITY, DOMAIN, DEFAULT, ExtIdentitySeedInc, COLNNAME, ExtCollation, ExtIdtNotForReplication, ExtDeftConstName, Sparse, FileStream, ExtRowGuidCol}

結果生成如下：

同理將SQL_2008_MyDefine::Script\Objects\Table\SqlListQuery下的Value的第一行中

{OWNER, TABLE, TABLE_TYPE, Comment}的Comment改爲{OWNER, TABLE, TABLE_TYPE, TNAME}

生成結果，如下：

 

至此，我的基本目的，已經達到了，雖然沒有直接生成Comment列，但可以通過以下vbs腳本，從Name列生成Comment列：

'代碼一:將name生成comment的腳本

Option Explicit                          
ValidationMode = True           
InteractiveMode = im_Batch  
Dim mdl 'the current model   
'get the current active model 
Set mdl = ActiveModel           
If (mdl Is Nothing) Then          
MsgBox "There is no current Model"                                                                                           
ElseIf Not mdl.IsKindOf(PdPDM.cls_Model) Then                                                                      
MsgBox "The current model is not an Physical Data model."                                                   
Else                                                                                                                                                  
ProcessFolder mdl                                                                                                                         
End If                                                                                                                                               
'This routine copy name into code for each table, each column and each view                     
'of the current folder                                                                                                                     
Private sub ProcessFolder(folder)                                                                                                
Dim Tab 'running table                                                                                                                 
for each Tab in folder.tables                                                                                                         
if not tab.isShortcut then                                                                                                               
tab.comment = tab.name                                                                                                              
Dim col 'running column                                                                                                              
for each col in tab.columns                                                                                                           
col.comment= col.name                                                                                                                
next                                                                                                                                                  
end if                                                                                                                                               
next                                                                                                                                                  
Dim view 'running view                                                                                                                
for each view in folder.Views                                                                                                        
if not view.isShortcut then                                                                                                            
view.comment = view.name                                                                                                         
end if                                                                                                                                               
next                                                                                                                                                  
'go into the sub-packages                                                                                                             
Dim f 'running folder                                                                                                                     
For Each f In folder.Packages                                                                                                        
if not f.IsShortcut then                                                                                                                   
ProcessFolder f                                                                                                                               
end if                                                                                                                                               
Next                                                                                                                                                 
end sub         

仔細思索：爲什麼從SQL生成的腳本有Comment,可是到生成PDM時爲什麼沒有轉化成功呢？是否Comment名稱不對應？

於是將原來的COMMENT加上COLNNAME，同時在下面的SQL語句中增加一列與COMMENT相同的值：

(select convert(varchar(8000), value) from ::fn_listextendedproperty(NULL, 'user', u.name, 'table', o.name, 'column', c.name) where name = 'MS_Description') as colnF,

如下圖：

這樣，Name列和Comment同時生成，終於OK！