RE: Fastest way to delete records.

[Zylka Marc <Zylka.Marc@xxxxxxxxx>]

I would use dynamic embedded SQL statements.  Pass in as parms 
the library name, table(file) name, the number of days you want 
to keep the data and the field name that contains the timestamp 
value.  Then build the SQL statement like this:

Eval      SQLStmt = 'Delete from ' + %TRIM(LibrIn) + 
                    '/' + %TRIM(Table) +      
                    ' where ' + %TRIM(Fieldname) +
                          ' < (current timestamp - ' +  
                          %TRIM(Numdays) + ' days)' 
          
This could produce:
        Delete from Datalib/File where field < (current timestamp - 30 days)

Now you have a program that you can use with any file that contains
timestamp.
Do not forget to include all of the rest of the sql return code checking
statements.
Also, you'll need to compile this using CRTSQLRPGI.

I don't know if this is the fastest method but it's the most flexible.

>I have a file with about 10 million records.  It is keyed on  Company #, 
>Employee #, and Time stamp.
>
>I need to delete all records that have a time stamp before a certain time 
>period.
>
>Any suggestions on the fastest approach?
>Speed is a very important factor. 

Marc Zylka

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