The index lookup is used when using labels with properties The label scan store that I described is used for all label scan
Von meinem iPhone gesendet > Am 07.07.2017 um 03:31 schrieb Sun Yuhan <[email protected]>: > > Actually I am using the neo4j to execute some graph pattern query ( subgraph > isomorphism). So the given query pattern will be a labeled graph and the > results are all subgraphs in the database that can fit the pattern. Does the > index you mentioned in the reply can achieve better performance than using > labels? > >> On Wednesday, July 5, 2017 at 1:32:15 AM UTC-7, Michael Hunger wrote: >> It should be a rare operation if you have indexes in place >> >> There is a reverse store mapping labels to sets of node ids >> >> In 3.1 it uses a compressed lucene format >> In 3.2 a custom generational b+ tree >> Details for both are only in the source >> >> >> >> Von meinem iPhone gesendet >> >>> Am 05.07.2017 um 07:31 schrieb Sun Yuhan <[email protected]>: >>> >>> The NodeByLabelScan is very commonly used in cypher query execution plans. >>> However, it is not clear how this operation is executed in neo4j. >>> >>> What's more, I do not know how the label is managed and stored in neo4j. >>> Are there any materials online that I can refer to? Or I can refer to some >>> source code of neo4j to see the implementation details. >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Neo4j" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "Neo4j" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
