[TINKERPOP-918] ComputerVerificationStrategy is too restrictive

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.1.0-incubating
• Fix Version/s: 3.1.0-incubating
• Component/s: process
• Assignee: Marko A. Rodriguez
• Reporter: Daniel Kuppitz
• Created: 24/Oct/15 17:17
• Updated: 29/Oct/15 15:16
• Resolved: 29/Oct/15 15:16

Description

gremlin> g.V().local(bothE().values("weight").fold())
==>[0.4, 0.5, 1.0]
==>[0.5]
==>[0.4, 0.4, 0.2]
==>[1.0, 0.4, 1.0]
==>[1.0]
==>[0.2]
gremlin> g.V().local(bothE().values("weight").fold()).order().by(sum(local), decr)
A final CollectingBarrierStep can not process an element beyond its id: OrderGlobalStep([decr([SumLocalStep])])
Display stack trace? [yN]

I'm not trying to process an element beyond its id. Another example is when the result is a list of Maps:

gremlin> g.V().as("v").map(bothE().values("weight").fold()).sum(local).as("s").select("v", "s")
==>[v:v[1], s:1.9]
==>[v:v[2], s:0.5]
==>[v:v[3], s:1.0]
==>[v:v[5], s:1.0]
==>[v:v[6], s:0.2]
==>[v:v[4], s:2.4]
gremlin> g.V().as("v").map(bothE().values("weight").fold()).sum(local).as("s").select("v", "s").order().by(select("s"), decr)
A final CollectingBarrierStep can not process an element beyond its id: OrderGlobalStep([decr([SelectOneStep(s)])])
Display stack trace? [yN]