RE: How to retrive deleted record in SQL?

Correct me if I'm wrong, but manipulating the flags in the save file would
not work since the restore would crash because the CRC code for the savf
record would not match the data for that record. (Unless you know the
algorithm for savf CRC codes.)

-Walden

-----Original Message-----
From: dhandy@isgroup.net [mailto:dhandy@isgroup.net]
Sent: Wednesday, December 23, 1998 1:35 PM
To: MIDRANGE-L@midrange.com
Subject: Re: How to retrive deleted record in SQL?


Bobby,

>When I delete a record using SQL delete statement, can I get it back?
>Is there any command to retrive back deleted record?

If the file has not been reorganized, and the deleted record has not
been reused because of REUSEDLT(*YES). then it is possible.  There are
a couple of ways of doing it.  One method used by QUSRTOOL is to copy
the physical file to a savf and manipulate the delete flags, then
restore the savf back to the physical file.

A better (and much faster) way is via a freeware tool written by Dave
McKenzie.  It uses MI to undelete records and works even at security
levels 40 and 50.  He has a separate version for CISC and RISC.

The programs are available in the News/400 shareware/freeware code
section.  You may want to look over the other stuff too by going to
www.news400.com, clicking the resources tab, then code, then
shareware/freeware.

Here are direct links to Dave's undelete utilities:

 CISC version: http://www.news400.com/sharewarefiles/undel.zip
 RISC version: http://www.news400.com/sharewarefiles/undelris.zip
 Source code: http://www.news400.com/sharewarefiles/undelsrc.zip

It appears from the web page these are still the versions from a
couple of years ago which do not support record formats with date,
time, or timestamp fields.  But Dave modified the tool to support
these also.  I don't have a link to the new versions.

Here is the description from the News400 website:

"UNDEL allows you to view, copy and un-delete deleted records in a
physical file. You can interactively display active and deleted
records, scan for deleted records and un-delete them. In addition, you
can copy records to print or to an outfile or un-delete them without
displaying them. UNDEL does not copy the file to a save file, but
operates directly on the records in the physical file. This makes it
very quick, even for huge physical files. Author: Dave McKenzie."

Don't thank me; thank Dave...

Doug
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