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| nyo | mcdonc: ayt? | 12:46 |
|---|---|---|
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| mcdonc | nyo: hey | 12:46 |
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| nyo | mcdonc: need to decide on IIndexSort interface. Should the sort method return an _iterable_ (like generator) or require them to return a finite sequence. I wonder if there can be any problems (performance or programming ones) with returning sequences from the ``sort`` method of some indexes. | 12:48 |
| mcdonc | nyo: the interface should probably make as few promises about this as possible.. just that it be iterable | 12:49 |
| nyo | mcdonc: currently, for example, the z.a.catalog needs a sequence, so it has to manually do the list(index.sort(...)) thing, but we could just require the sort method to return a sequence | 12:49 |
| mcdonc | why does z.a.catalog need a sequence? | 12:50 |
| nyo | mcdonc: because it needs to know length | 12:50 |
| mcdonc | ah | 12:51 |
| mcdonc | oh | 12:51 |
| mcdonc | one thing i thought of | 12:51 |
| nyo | mcdonc: the ResultSet object that catalog's searchResults returns has the __len__ object | 12:51 |
| mcdonc | and this would make it possible to not need the length | 12:51 |
| nyo | /object/method/ | 12:51 |
| mcdonc | instead of throwing away docids that dont have a value in the sort index... | 12:51 |
| mcdonc | maybe the IIndexSort interface can take a flag | 12:51 |
| mcdonc | sort_unknown_bottom=True (bad name) | 12:52 |
| nyo | ? | 12:52 |
| mcdonc | but essentially a flag that tells the sort method how to sort docids that dont have a value in the sort index | 12:52 |
| mcdonc | whether they should be at the bottom or the top | 12:53 |
| mcdonc | so the length of the iterable you get back from the sort method would be guaranteed to be the length of the set you passed in to sort | 12:53 |
| mcdonc | (and then you dont need to recompute length, you'd have it already) | 12:53 |
| nyo | mcdonc: I don't think it's possible anyway. it will break ResultSet. it relies on the sequence nature of uid list | 12:54 |
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| nyo | mcdonc: if there will be a generator, it will work only once for example | 12:54 |
| nyo | (iteration, i mean) | 12:55 |
| mcdonc | that's mostly resultset's problem i think | 12:55 |
| mcdonc | random access into the result set is a higher-level thing | 12:55 |
| mcdonc | and unwinding the generator if its necessary is probably the right thing | 12:56 |
| mcdonc | random access into a result set is sort of nonsensical for most apps i think | 12:56 |
| nyo | mcdonc: so you think we need to declare it just as iterable as it's now? | 12:57 |
| mcdonc | nyo: i think so... at least avoid promising that it will be a fully materialized random-acessible thing... does that make sense? | 12:57 |
| nyo | mcdonc: yep | 12:58 |
| mcdonc | great | 12:58 |
| mcdonc | what do you think of the dont-throw-away-values thing | 12:58 |
| nyo | mcdonc: appending docids that is not in the index to the top/bottom can be quite hard to implement | 12:58 |
| nyo | in some cases ) | 12:58 |
| mcdonc | maybe yeah | 12:58 |
| mcdonc | i havent done it yet | 12:59 |
| mcdonc | it sounds good ;-) | 12:59 |
| nyo | also, I don't think there will be much cases where it's needed | 12:59 |
| mcdonc | i think it'll always be bottom anyway | 12:59 |
| mcdonc | if it were to be implemented | 12:59 |
| mcdonc | i dont want random stuff at the top of my result set | 12:59 |
| mcdonc | so i think it's fine to avoid it for now in the interface | 13:00 |
| nyo | mcdonc: btw, even FieldIndex can't do that nicely when using set intersections | 13:00 |
| mcdonc | right | 13:00 |
| nyo | mcdonc: ok | 13:00 |
| mcdonc | thanks for taking charge of this ;-) | 13:01 |
| nyo | mcdonc: I'll commit keywordindex backward-incompatibility breakage now (normalization thing, we talked about), can you review? | 13:01 |
| mcdonc | sure | 13:01 |
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| nyo | mcdonc: Done. I also wrote an explanation in CHANGES.txt, please review that as well. | 13:12 |
| nyo | mcdonc: I'm afk for some time | 13:12 |
| mcdonc | nyo: ok... will do | 13:13 |
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| mcdonc | nyo: would you be willing to reverse the arg order of limit and reverse in IIndexSort? it'd help me not need to subclass to service existing code | 13:31 |
| nyo | mcdonc: sort(docids, reverse=False, limit=None)? of course. that will do more sense even:) | 13:41 |
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| mcdonc | nyo: yes, great... | 13:42 |
| nyo | mcdonc: done | 13:43 |
| mcdonc | thank you! | 13:43 |
| nyo | so I'm going to release it. others seems to either don't have any objections or are not interested (so they also don't have objections). | 13:44 |
| mcdonc | nyo: go for it | 13:44 |
| mcdonc | this is factored really nicely... its great we can both use the same index impls but different catalog impls | 13:46 |
| nyo | mcdonc: yeah, they can also be used just separately or with z3c.indexer | 13:47 |
| * mcdonc reads http://svn.zope.org/z3c.indexer/trunk/src/z3c/indexer/README.txt?rev=93529&view=markup | 13:48 | |
| mcdonc | good idea... | 13:50 |
| mcdonc | yes, i suspect that being able to spell the ordering of which indexes to intersect in what order would help performance too... z.a.catalog and repoze.catalog dont allow for this | 13:51 |
| nyo | mcdonc: yeah, it also does index-on-commit so it does less indexing-unindexing when using event-based indexing | 13:52 |
| mcdonc | sweet | 13:53 |
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| mcdonc | that's awesome | 13:54 |
| mcdonc | i'm so going to steal that ;-) | 13:55 |
| nyo | mcdonc: okay, 3.5.0 is there | 13:59 |
| mcdonc | nyo: cool, thanks | 13:59 |
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| goschtl | hi has anyone an example of a custom IGroup implementation? | 15:49 |
| nyo | any1 interested in reviewing "nadako-sorting" branch of zope.app.catalog? :) | 15:51 |
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