RE: Clear a file in RPG ?

Not true....

DB2 doesn't have a separate command, but the DELETE statement will perform in a equivalent manner to
Oracles TRUNCATE TABLE if possible.

DELETE Performance: An SQL DELETE statement that does not contain a WHERE clause will delete all rows
of a table. In this case, the rows may be deleted using either a clear operation (if not running under
commitment control) or a change file operation (if running under commitment control). If running under
commitment control, the deletes can still be committed or rolled back. This implementation will be
much faster than individually deleting each row, but individual journal entries for each row will not
be recorded in the journal. This technique will only be used if all the following are true:
v The target table is not a view.
v A significant number of rows are being deleted.
v The job issuing the DELETE statement does not have an open cursor on the file (not including
pseudo-closed SQL cursors).
v No other job has a lock on the table. v The table does not have an active delete trigger.
v The table is not the parent in a referential constraint with a CASCADE, SET NULL, or SET DEFAULT
delete rule.
v The user issuing the DELETE statement has *OBJMGT or *OBJALTER system authority on the table in
addition to the DELETE privilege.




Charles Wilt
Software Engineer
CINTAS Corporation - IT 92B
513.701.1307

wiltc@xxxxxxxxxx

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Haas, Matt (CL Tech Sv)
Sent: Thursday, April 03, 2008 2:58 PM
To: RPG programming on the AS400 / iSeries
Subject: RE: Clear a file in RPG ?

Except that deletes all the records and clearing a file is different.
Oracle has a TRUNCATE TABLE statement but I don't think OS/400 SQL has it.

Matt

-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of MKirkpatrick@xxxxxxxxxxxxxxxxx
Sent: Thursday, April 03, 2008 2:57 PM
To: RPG programming on the AS400 / iSeries
Subject: Re: Clear a file in RPG ?

you could use embedded SQL


rpg400-l-bounces@xxxxxxxxxxxx wrote on 04/03/2008 11:50:40 AM:

Hi, is it possible to do a CLRPFM but in the RPG, and how?

Thank you,

Phil


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