GitHub user okram opened a pull request:
https://github.com/apache/tinkerpop/pull/701
TINKERPOP-1762: Make MatchStep analyze mid-clause variables for executing
ordering purposes.
https://issues.apache.org/jira/browse/TINKERPOP-1762
There was a bug in `MatchStep` where if you had a mid-clause `where()`, its
variable was not being considered as part of the determination of the matching
start-variables. This led to traversers going down clause paths when they
didn't have all the subsequent data.
```
gremlin> graph = TinkerGraph.open()
==>tinkergraph[vertices:0 edges:0]
gremlin> graph.io(graphml()).readGraph("data/grateful-dead.xml")
==>null
gremlin> g = graph.traversal()
==>graphtraversalsource[tinkergraph[vertices:808 edges:8049], standard]
gremlin> g.V().match(
......1> __.as("sunshine").has("song", "name", "HERE COMES SUNSHINE"),
......2>
__.as("sunshine").map(inE("followedBy").values("weight").mean()).as("avg_weight"),
......3> __.as("sunshine").inE("followedBy").as("x"),
......4>
__.as("x").filter(values("weight").where(gte("avg_weight"))).outV().as("followers")).
......5> select("followers").by("name");
==>LOOKS LIKE RAIN
==>PROMISED LAND
==>LIBERTY
==>EL PASO
==>PLAYING IN THE BAND
==>BIG RIVER
==>CASEY JONES
==>THE MUSIC NEVER STOPPED
gremlin>
```
VOTE +1
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/apache/tinkerpop TINKERPOP-1762
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/tinkerpop/pull/701.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #701
----
commit 651367be902a378a6d813ac39efac0bbc20561eb
Author: Marko A. Rodriguez <okramma...@gmail.com>
Date: 2017-08-29T21:46:32Z
fixed a bug in match() where mid-clause where() variables were not being
considered (only start where()s were).
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