15 replies

mergeE(): increment counter on match

Hi, is there an easy way to increment an existing edge property based on its current value using

mergeE()

mergeE()

in one single query? (e.g.,

counter += 1

counter += 1

)

Something similar to this:

g.mergeE([(T.label):'called', (from): person1, (to):person2]).
  option(Merge.onCreate,['num_calls': 1]).
  option(Merge.onMatch,['num_calls': X+1])

g.mergeE([(T.label):'called', (from): person1, (to):person2]).
  option(Merge.onCreate,['num_calls': 1]).
  option(Merge.onMatch,['num_calls': X+1])

where

is the current value of edge propery

num_calls

num_calls

Solution

gremlin> g.mergeE([(Direction.from):44,(Direction.to):8]).valueMap(true)
==>[id:5062,label:route,dist:549]

gremlin> g.mergeE([(Direction.from):44,(Direction.to):8]).valueMap(true)
==>[id:5062,label:route,dist:549]

and then

gremlin>  g.mergeE([(Direction.from):44,(Direction.to):8]).
......1>     option(onMatch,property('dist',union(values('dist'), __.constant(1)).sum()).constant([:])).valueMap(true)   
==>[id:5062,label:route,dist:550]

gremlin>  g.mergeE([(Direction.from):44,(Direction.to):8]).
......1>     option(onMatch,property('dist',union(values('dist'), __.constant(1)).sum()).constant([:])).valueMap(true)   
==>[id:5062,label:route,dist:550]

Jump to solution

Apache TinkerPop•2y ago•

15 replies

rpuga

mergeE(): increment counter on match

Hi, is there an easy way to increment an existing edge property based on its current value using

mergeE()

mergeE()

in one single query? (e.g.,

counter += 1

counter += 1

)

Something similar to this:

g.mergeE([(T.label):'called', (from): person1, (to):person2]).
  option(Merge.onCreate,['num_calls': 1]).
  option(Merge.onMatch,['num_calls': X+1])

g.mergeE([(T.label):'called', (from): person1, (to):person2]).
  option(Merge.onCreate,['num_calls': 1]).
  option(Merge.onMatch,['num_calls': X+1])

where

is the current value of edge propery

num_calls

num_calls

Solution

gremlin> g.mergeE([(Direction.from):44,(Direction.to):8]).valueMap(true)
==>[id:5062,label:route,dist:549]

gremlin> g.mergeE([(Direction.from):44,(Direction.to):8]).valueMap(true)
==>[id:5062,label:route,dist:549]

and then

gremlin>  g.mergeE([(Direction.from):44,(Direction.to):8]).
......1>     option(onMatch,property('dist',union(values('dist'), __.constant(1)).sum()).constant([:])).valueMap(true)   
==>[id:5062,label:route,dist:550]

gremlin>  g.mergeE([(Direction.from):44,(Direction.to):8]).
......1>     option(onMatch,property('dist',union(values('dist'), __.constant(1)).sum()).constant([:])).valueMap(true)   
==>[id:5062,label:route,dist:550]

Jump to solution

mergeE(): increment counter on match

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