Portal | Manuals | References | Downloads | Info | Programs | JCLs | Mainframe wiki | Quick Ref
IBM Mainframe Computers Forums Index
 
Register
 
IBM Mainframe Computers Forums Index Mainframe: Search IBM Mainframe Forum: FAQ Memberlist Profile Log in to check your private messages Log in
 
Extracting the View scripts of a table

 
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> DB2
View previous topic :: :: View next topic  
Author Message
Bhuvanesh Subburajan

New User


Joined: 06 Jan 2012
Posts: 2
Location: India

PostPosted: Thu Mar 14, 2013 3:26 pm    Post subject: Extracting the View scripts of a table
Reply with quote

Hi

I am developing a tool to retrieve the DDL statements used for creating the views of the given table. Initially, I was extracting the view scripts of the given Table by retrieving the TEXT column of the SYSIBM.SYSVIEWS table by joining with the SYSIBM.SYSVIEWDEP table using the given table name and schema.

Now I have a requirement in which I have to retrieve the texts all the dependent views on this table i.e., the views which are dependent on the views created using the original tables. I have even coded a SQL statement for that too. PFB the code for that statement

Code:


 SQL_STMT_VDF2 = "SELECT A.TEXT FROM SYSIBM.SYSVIEWS A", 
                 "INNER JOIN SYSIBM.SYSVIEWDEP B",       
                 "ON A.NAME = B.DNAME AND B.BTYPE = 'V'",
                 "INNER JOIN SYSIBM.SYSVIEWDEP C",       
                 "ON B.BNAME = C.DNAME",                 
                 "WHERE C.BNAME = ?",                     
                 "AND C.BCREATOR = ?"                     


My query is what if I want to extract the views that are dependent on the view's view or view's view's view and so on.

Let me rephrase it

I want to extract the create text of the all the views that are associated with the given table irrespective of whether it is dependent of the table directly or to the views of the table. What can I do?
Back to top
View user's profile Send private message

GuyC

Senior Member


Joined: 11 Aug 2009
Posts: 1281
Location: Belgium

PostPosted: Thu Mar 14, 2013 7:18 pm    Post subject:
Reply with quote

write a recursive SQL :
Code:
with CTE(cnt, creator, name, depcreator, depname) as
  (select 1 , DCREATOR ,DNAME, bcreator, bname
     from sysibm.sysviewdep
    where bname = ? and BCREATOR = ?
   union all
   select cte.cnt + 1 , dcreator, dname, bcreator, bname
     from sysibm.sysviewdep, cte
    where BCREATOR= cte.creator and  BNAME = cte.name
      and cte.cnt < 5)

select cte.cnt, v.creator, v.name
     , cast(v.text as varchar(10000))
  from cte
     , sysibm.sysviews V
where v.name = cte.name and v.creator = cte.creator
Back to top
View user's profile Send private message
Bhuvanesh Subburajan

New User


Joined: 06 Jan 2012
Posts: 2
Location: India

PostPosted: Fri Mar 15, 2013 3:31 pm    Post subject: Reply to: Extracting the View scripts of a table
Reply with quote

Its working icon_smile.gif

Thank you so much icon_smile.gif
Back to top
View user's profile Send private message
View previous topic :: :: View next topic  
Post new topic   Reply to topic    IBMMAINFRAMES.com Support Forums -> DB2 All times are GMT + 6 Hours
Page 1 of 1

 

Search our Forum:

Similar Topics
Topic Author Forum Replies Posted
No new posts Facing Issue in Table Reorg satish.ms10 DB2 1 Tue Aug 07, 2018 2:44 am
No new posts Create view statement from SYSIBM.SYS... andrea DB2 5 Thu Aug 02, 2018 9:30 pm
No new posts Convert JCL to Unix Shell scripts mistah kurtz All Other Mainframe Topics 2 Sun Jul 01, 2018 7:21 pm
No new posts SQL IN predicate using COBOL table jerryte DB2 16 Fri Jun 29, 2018 10:30 pm
No new posts Extracting DDL for all list of intere... Ashishpanpaliya DB2 5 Mon May 21, 2018 4:08 pm

Facebook
Back to Top
 
Job Vacancies | Forum Rules | Bookmarks | Subscriptions | FAQ | Polls | Contact Us