使用嵌入 neo4j(版本 3.5.3)的理解时遇到问题。
例如,这种查询在 neo4j 企业 3.5.3 中工作得非常好,但不适用于 neo4j-embedded :
MATCH (myNode:MyNode {myId:'myid'})
MATCH path = ( (myNode) -[*0..]- (otherNode:MyNode) )
WHERE
ALL(n in nodes(path) where [ (n)<--(state:MyState) | state.isConnected ][0] = true)
RETURN myNode, otherNode
我在使用 neo4j-embedded 时遇到的错误很难理解,看起来像是一个内部错误:
org.neo4j.driver.v1.exceptions.DatabaseException: This expression should not be added to a logical plan:
VarExpand(myNode, BOTH, OUTGOING, List(), otherNode, UNNAMED62, VarPatternLength(0,None), ExpandInto, UNNAMED62_NODES, UNNAMED62_RELS, Equals(ContainerIndex(PatternComprehension(None,RelationshipsPattern(RelationshipChain(NodePattern(Some(Variable( UNNAMED62_NODES)),List(),None,None),RelationshipPattern(Some(Variable( REL136)),List(),None,None,INCOMING,false,None),NodePattern(Some(Variable(state)),List(LabelName(MyState)),None,None))),None,Property(Variable(state),PropertyKeyName(isConnected))),Parameter( AUTOINT1,Integer)),True()), True(), List((Variable(n),Equals(ContainerIndex(PatternComprehension(None,RelationshipsPattern(RelationshipChain(NodePattern(Some(Variable(n)),List(),None,None),RelationshipPattern(Some(Variable( REL136)),List(),None,None,INCOMING,false,None),NodePattern(Some(Variable(state)),List(LabelName(MyState)),None,None))),None,Property(Variable(state),PropertyKeyName(isConnected))),Parameter( AUTOINT1,Integer)),True())))) {
LHS -> CartesianProduct() {
LHS -> Selection(Ands(Set(In(Property(Variable(myNode),PropertyKeyName(myId)),ListLiteral(List(Parameter( AUTOSTRING0,String))))))) {
LHS -> NodeByLabelScan(myNode, LabelName(MyNode), Set()) {}
}
RHS -> NodeByLabelScan(otherNode, LabelName(MyNode), Set()) {}
}
}
任何想法 ?