Comments (3)
What i did wrong?
from datafrog.
Variable::from_join
takes two inputs, the first is a Variable
that holds tuples of type (K, V1)
, and the second is a Relation
that holds tuples of type (K, V2)
. A join looks for all pairs of tuples in both inputs that share a "key" (a value of type K
) and calls the closure for each pair (whose values are of type V1
and V2
respectively).
In your case, the key is the source node for both edges and paths, so your join isn't doing what you want. For example, at the first iteration, it sees that the (0, 1)
in path_var
and the (0, 1)
in edges_var
have a shared key (0
), and your closure produces the combination of their values (1, 1)
. Repeating this process will give the same result as datafrog
does.
What you actually want is to make the shared key the source of one of the lists and the target of the other. You'll need to reverse one of the relations, probably edges
, to get this behavior.
from datafrog.
Variable::from_join
takes two inputs, the first is aVariable
that holds tuples of type(K, V1)
, and the second is aRelation
that holds tuples of type(K, V2)
. A join looks for all pairs of tuples in both inputs that share a "key" (a value of typeK
) and calls the closure for each pair (whose values are of typeV1
andV2
respectively).In your case, the key is the source node for both edges and paths, so your join isn't doing what you want. For example, at the first iteration, it sees that the
(0, 1)
inpath_var
and the(0, 1)
inedges_var
have a shared key (0
), and your closure produces the combination of their values(1, 1)
. Repeating this process will give the same result asdatafrog
does.What you actually want is to make the shared key the source of one of the lists and the target of the other. You'll need to reverse one of the relations, probably
edges
, to get this behavior.
Thanks!
from datafrog.
Related Issues (11)
- Add simple profiling statistics
- Investigate the effect of "treefrog leapjoin"-ing more than one Variable HOT 2
- Add repo to Cargo.toml
- Unit tests
- bring this crate into conformance with compiler-team crate policy HOT 1
- Disjunctive (OR) *filters* HOT 7
- `Relation::from_antijoin` is broken HOT 1
- CI no longer runs HOT 1
- Datafrog does not support early termination HOT 5
- Datalog query with leapjoin
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from datafrog.