[jira] [Commented] (TINKERPOP-3056) mergeE is updating vertices in certain conditions

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TINKERPOP-3056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17817018#comment-17817018 ] 

ASF GitHub Bot commented on TINKERPOP-3056:
-------------------------------------------

spmallette opened a new pull request, #2487:
URL: https://github.com/apache/tinkerpop/pull/2487

   https://issues.apache.org/jira/browse/TINKERPOP-3056
   
   Since the current traverser was only being updated onMatch when it was used as a start step doing mutations in a sideEffect() would update whatever the current traverser was. This code may have been leftover from a time when the merge steps operated more readily on the current traverser as an argument to the step.
   
   VOTE +1




> mergeE is updating vertices in certain conditions
> -------------------------------------------------
>
>                 Key: TINKERPOP-3056
>                 URL: https://issues.apache.org/jira/browse/TINKERPOP-3056
>             Project: TinkerPop
>          Issue Type: Bug
>          Components: process
>    Affects Versions: 3.6.6
>            Reporter: Stephen Mallette
>            Priority: Blocker
>
> {code}
> gremlin> g.addV('mytestlabel').property(id, 'testA').property('timestamp', 1).as('a').
> ......1>   addV('mytestlabel').property(id, 'testA2').property('timestamp', 1).as('a2').
> ......2>   addE('mytestlabel').from('a').to('a2').property('timestamp', 2).valueMap(true)
> ==>[id:2,label:mytestlabel,timestamp:2]
> gremlin> g.V().mergeE([(T.label):'mytestlabel', (Direction.from): 'testA', (Direction.to):'testA2']).
> ......1> option(onMatch, sideEffect(property(single, 'timestamp', 4).property(single, 'edgelabel', 'exists')).
> ......2> constant([:])).valueMap(true)
> ==>[id:2,label:mytestlabel,timestamp:2]
> ==>[id:2,label:mytestlabel,timestamp:2]
> gremlin> g.V().valueMap(true)
> ==>[id:testA2,label:mytestlabel,edgelabel:[exists],timestamp:[4]]
> ==>[id:testA,label:mytestlabel,edgelabel:[exists],timestamp:[4]]
> {code}



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