Re^6: DBM::Deep Problem

Be careful not to mix apples and oranges here. MLDBM uses one strategy. DBM::Deep uses a different strategy that does indeed work to track changes to deep structures. However, there is a bug with autoviv: it doesn't call the STORE routine of the tied hash when a value is autovivied for a deeper reference.

If you carefully extend your DBM::Deep hash, it works as advertised, and in a way that MLDBM cannot touch, and in a way that requires no binary DBM module. This is a remarkable achievement. The horsing around required by MLDBM referenced in Re^3: DBM::Deep Problem is not required in DBM::Deep.... you just have to not autovivify.

The tie bug is sad. I wish it would get fixed.

-- Randal L. Schwartz, Perl hacker
Be sure to read my standard disclaimer if this is a reply.

Comment on Re^6: DBM::Deep Problem

Replies are listed 'Best First'.
Re^7: DBM::Deep Problem by holli (Abbot) on May 18, 2005 at 12:34 UTC
The tie bug is sad. I wish it would get fixed. So write a patch :-) holli, /regexed monk/	[reply]
Re^8: DBM::Deep Problem by merlyn (Sage) on May 18, 2005 at 12:58 UTC
Well, I'll at least submit a Test::More that should eventually pass: Read more... (2 kB) -- Randal L. Schwartz, Perl hacker Be sure to read my standard disclaimer if this is a reply.	[reply] [d/l]
Re^7: DBM::Deep Problem by demerphq (Chancellor) on May 18, 2005 at 12:39 UTC
Well, i guess i read the comments in MLDBM as including the problem of autovivification on ties. It says `This limitation exists because the perl TIEHASH interface currently ha +s no support for multidimensional ties.` [download] which i guess isnt exactly the same thing, but its pretty close. --- $world=~s/war/peace/g	[reply] [d/l]
Re^8: DBM::Deep Problem by merlyn (Sage) on May 18, 2005 at 13:05 UTC
Well, it doesn't need support for multidimensional ties. ties just need to get a bit smarter. See my test code, which I've submitted as a way for the P5P to understand what the breakage is. -- Randal L. Schwartz, Perl hacker Be sure to read my standard disclaimer if this is a reply.	[reply]
Re^9: DBM::Deep Problem by demerphq (Chancellor) on May 18, 2005 at 13:39 UTC
Good plan. Test cases are always helpful. --- $world=~s/war/peace/g	[reply]