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Coalesce() step behaves differently than Or() step, with exception in sum() step
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hadoopmarc@...
This question is also asked to the gremlin user group, where it can be best answered:
https://groups.google.com/g/gremlin-users/c/-oBWRUxF_Hw |
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I am trying to replace coalesce() by or() which is generally faster, but there is a problem with or() step failing in the following mum() step:
gremlin> graph3 = TinkerGraph.open() ==>tinkergraph[vertices:0 edges:0]
gremlin> graph3.io(graphml()).readGraph('data/grateful-dead.xml') ==>null
gremlin> g3 = graph3.traversal() ==>graphtraversalsource[tinkergraph[vertices:808 edges:8049], standard]
gremlin> g3.V('89').values("performances") ==>219
gremlin> g3.V('89').values("performances").sum() ==>219
gremlin> g3.V('89').or(values("performances")).sum() ==> org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerVertex cannot be cast to java.lang.Number
gremlin> g3.V('89').or(values("performances"),__.constant("10000")).sum() ==> org.apache.tinkerpop.gremlin.tinkergraph.structure.TinkerVertex cannot be cast to java.lang.Number
gremlin> g3.V('89').coalesce(values("performances"),__.constant("10000")).sum() ==>219
Is an error, or wrong doing?
CM
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