[TINKERPOP-1188] Semantics of BarrierSteps in TraversalParent global traversals is wrong.

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.1-incubating
• Fix Version/s: 3.2.0-incubating
• Component/s: process
• Labels: breaking
• Assignee: Marko A. Rodriguez
• Reporter: Marko A. Rodriguez
• Created: 01/Mar/16 17:22
• Updated: 15/Sep/16 16:20
• Resolved: 02/Mar/16 13:31

Description

Suppose the following traversal:

g.V.union(outE().count(), inE().count())

Given that count() is a ReducingBarrierStep and thus, continues to pull until there are no more results, you would expect the result set to be:

[6,6]

However, its actually this:

[3,0]
[0,1]
[0,3]
[2,1]
[0,1]
[1,0]

That is, for each traverser into union(), the count() is calculated.

In OLAP, the result is [6,6] as expected.

What should we do?

Issue Links

• is duplicated by: TINKERPOP-1429 Branch step inside where step misbehaves