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The "Self-Descriptive" Neo4j Graph Database:

Embedded Metamodel Subgraphs in the FactMiners Social-Game Ecosystem - Part 1 of 4

Author: Jim Salmons, Project Director - The Softalk Apple Project and the FactMiners Ecosystem

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Game Of Life

Game of Life is mathematic toy world that was invented by John Horton Conway in 1970. Game of Life is played on a grid of cells that are either dead or alive by simluating how the world evolves over a series of rounds. In each round cells die, survive, or are reborn depending on the number of neighbours they have. You can find out more about Game of Life by watching the video below or reading up on it in Wikipedia.

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Projection
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scalac: Error: assertion failed: 
     while compiling: /Users/ata/dev/neo/neo4j/community/cypher/cypher-compiler-2.1/src/test/scala/org/neo4j/cypher/internal/compiler/v2_1/planner/logical/steps/ProjectionTest.scala
        during phase: superaccessors
     library version: version 2.10.4
    compiler version: version 2.10.4
  reconstructed args: -Xmax-classfile-name 100 -bootclasspath /Library/Java/JavaVirtualMachines/jdk1.7.0_21.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_21.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_21.jdk/Contents/Home/jre/lib/sunrsasign.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_21.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_21.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_21.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_21.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_21.jdk/Content

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0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
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1100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
1100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
1100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
1100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
1100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

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Rewriting query: MATCH a WITH a MATCH a-->b RETURN *
ASTRewriter in:                --> Query(None,SingleQuery(List(Match(false,Pattern(List(EveryPath(NodePattern(Some(Identifier(a)(6)@523848e8),List(),None,true)))),List(),None), With(false,ListedReturnItems(List(UnaliasedReturnItem(Identifier(a)(13)@1e9ba5aa,a))),None,None,None,None), Match(false,Pattern(List(EveryPath(RelationshipChain(NodePattern(Some(Identifier(a)(21)@4356cf6c),List(),None,true),RelationshipPattern(None,false,List(),None,None,OUTGOING),NodePattern(Some(Identifier(b)(25)@784bddfd),List(),None,true))))),List(),None), Return(false,ReturnAll(),None,None,None))))
nameMatchPatternElements$      --> Query(None,SingleQuery(List(Match(false,Pattern(List(EveryPath(NodePattern(Some(Identifier(a)(6)@523848e8),List(),None,true)))),List(),None), With(false,ListedReturnItems(List(UnaliasedReturnItem(Identifier(a)(13)@1e9ba5aa,a))),None,None,None,None), Match(false,Pattern(List(EveryPath(RelationshipChain(NodePattern(Some(Identifier(a)(21)@4356cf6c),List

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Plan assuming independence

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Plan assuming dependence

50 rows returned
Compiler CYPHER 2.2-cost

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/Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/bin/java "-Dspecs2.ex=should not be here. delete when in sight" -Didea.launcher.port=7533 "-Didea.launcher.bin.path=/Applications/IntelliJ IDEA 13.app/bin" -Dfile.encoding=UTF-8 -classpath "/Users/ata/Library/Application Support/IntelliJIdea13/Scala/lib/scala-plugin-runners.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/lib/javafx-doclet.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/lib/tools.jar:/Library/Java/JavaVirtualMachines/jdk1.7.0_55.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachine

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[{
  "plans":["NodeByLabelScan[al](al, Right(LabelId(4)), Set())","Selection[al](ArrayBuffer(HasLabels(al, LabelName(\"Album\") ⸬ ⬨)))\n↳ AllNodesScan[al](al, Set())"],
  "winner":"NodeByLabelScan[al](al, Right(LabelId(4)), Set())",
  "calculations":[{
    "plan":"Selection[al](ArrayBuffer(HasLabels(al, LabelName(\"Album\") ⸬ ⬨)))\n↳ AllNodesScan[al](al, Set())",
    "cost":227508.0,
    "cardinalityEstimations":[{
      "plan":"AllNodesScan[al](al, Set())",
      "result":113754.0,
      "selectivityCalculations":[{