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https://issues.apache.org/jira/browse/TINKERPOP-3056?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17817147#comment-17817147
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ASF GitHub Bot commented on TINKERPOP-3056:
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spmallette merged PR #2487:
URL: https://github.com/apache/tinkerpop/pull/2487
> 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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