Re: any support for deleting an entry from cdb file?
[email protected] (Paul Jarc) Mon, 11 Apr 2005 16:10:30 -0400
| Newsgroups | gmane.comp.djb.cdb |
|---|---|
| Organization | What did you have in mind? A short, blunt, human pyramid? |
| Message-ID | <[email protected]> |
Dev Man <[email protected]> wrote: > Is there any way to delete records from the CDB database? The library doesn't currently provide that. > If not, is it feasible to add? It depends on what you mean, exactly. Remember the "c" is for "constant" - the database is never modified after it's created. Instead, you create a new version of the database as a temporary file, and atomically rename that file overe the original. So there are two kinds of deletion that might make sense: removing one of the just-added records during creation of a new database, or creating a new version of a database that contains most of the old records, with a few missing. The first doesn't seem too useful. The second could be useful in the case where there is no higher-level source that the cdb is built from, although that's uncommon. It requires a library function to iterate through the records in the old database, which is not in cdb-0.75, but is around somewhere - check the archives. paul