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I am trying to delete rows from a table and am having a hard time finding a good way to do this. With this in mind, I do not want to delete all rows, only those rows that meet a certain criteria.
The table to be deleted from does not have any keys, so I cannot use the 'delete the existing record' option on the target properties.
I also tried using a DBMS SQL type flow and had parsing errors occur after I entered the sql code to delete the rows.
Should I be using a stored procedure type flow to do this? And if so, does anyone have any samples for this?
You will probably need to create a stored procedure and use MODIFY/NEXT logic to delete the records. But you will want to run the stored procedure as part of a flow in order to get a log of the results. Your delete logic might look something like this:
MODIFY FILE <filename>
NEXT <column name>
ON NEXT IF <negative of your selection criteria for deleting> GOTO TOP ;
ON NEXT DELETE
ON NONEXT GOTO EXIT
DATA
END
WebFOCUS 7.7.05
Posts: 1213 | Location: Seattle, Washington - USA | Registered: October 22, 2007
I would worry about performance with the check each record/looping approach. I think the phrase "when doing database things, use a database tool" is a good phrase to live by. I would go the DBMS SQL route. Your "parsing error" might have been just some bad SQL. Send your delete statement. Set based deleting from tables (and adding/modifying) is what DBs are made for.
------ Livin' down on the cube farm. Left, right, right.
iWay 5.6 Windows Excel, Tab-delimited, XML
Posts: 23 | Location: Minnesota | Registered: July 27, 2009