![Agenda
Introductions
oCIG updates (Petra Selmer, Neo4j)
openCypher Contributor Agreement [oCCA] (Alastair Green, Neo4j)
A schema language for Cypher (Alastair Green, Neo4j)
Supporting dates and times in Cypher (Tobias Lindaaker, Neo4j)
Cypher for Gremlin (Dimitry Solovyov, Neueda)
---Any other items?---](https://image.slidesharecdn.com/ocig7-welcome-180315114703/85/Seventh-openCypher-Implementers-Group-Meeting-Status-Update-3-320.jpg)
![What’s been happening since oCIG 6?
[October 2017]](https://image.slidesharecdn.com/ocig7-welcome-180315114703/85/Seventh-openCypher-Implementers-Group-Meeting-Status-Update-6-320.jpg)
Seventh openCypher Implementers Group Meeting: Status Update
- 1. The Seventh Meeting of the openCypher Implementers Group (oCIG 7) Wednesday, 14 March 2018 Petra Selmer (Neo4j)
- 3. Agenda Introductions oCIG updates (Petra Selmer, Neo4j) openCypher Contributor Agreement [oCCA] (Alastair Green, Neo4j) A schema language for Cypher (Alastair Green, Neo4j) Supporting dates and times in Cypher (Tobias Lindaaker, Neo4j) Cypher for Gremlin (Dimitry Solovyov, Neueda) ---Any other items?---
- 4. How to broadcast your openCypher news [email protected] Slack: openCypher Implementers channel Message me directly (your news will appear on these slides for posterity)
- 6. What’s been happening since oCIG 6? [October 2017]
- 7. CIRs CIR-2017-263: node/relationship accessibility after DELETE operation Semantics of operations where operands are variables bound to deleted entities CIR-2017-264: allowing expressions in WHERE subclause of WITH clause with aggregations CIR-2018-296: resolving MERGE being dependant on evaluation order Improve the semantics of MERGE so that the behaviour does not depend on the evaluation order of the incoming rows, leading to greater clarity and future optimizations
- 8. CIRs CIR-2018-297: Provide an IF (that does not span two lines) CIR-2018-298: Support exact decimal type to prevent rounding errors (with floating point numbers) This is especially relevant when dealing with currency CIR-2018-302: More operations on paths Getting subpaths; adding paths; etc CIPs welcome!
- 9. oCIM 3 13 November 2017, Nancy, France Cypher 10: Multiple graph support Query composition Cypher Improvement Summary
- 10. Multiple graphs & query composition Using CIS, we are discussing: Graph data model Query processing model Equality and equivalence Access, project, and return graphs Managing graphs in the catalog Query composition and subqueries Named queries and graphs For oCIM 4!
- 11. Conferences Montréal Spark meetup December 2017, Canada Compiling openCypher graph queries with Spark Catalyst (Gábor Szárnyas, University of Budapest) FOSDEM (Free & Open Source Developers’ European Meeting) Graph Processing Devroom, February 2018, Brussels, Belgium Cypher: an evolving query language for property graphs (Stefan Plantikow, Neo4j) Cypher for Apache Spark (Martin Junghanns, Max Kiessling, Neo4j) Graph-based analysis of JavaScript source code repositories (Gábor Szárnyas, University of Budapest)
- 12. Cypher.PL Executable specification of the Cypher query language Describes use cases with unclear semantics (aggregation) Accepted at GraphSM Conference (DBKDA - Advances in Databases, Knowledge, and Data Applications) Nice, France, May 2018 Jan Posiadała Pawel Susicki Filip Murlak
- 13. Formal semantic specification SIGMOD, Houston, Texas, USA (June 2018) Cypher: An Evolving Query Language for Property Graphs Collaboration between the University of Edinburgh and Neo4j: Nadime Francis, Alastair Green, Paolo Guagliardo, Leonid Libkin, Tobias Lindaaker, Victor Marsault, Stefan Plantikow, Mats Rydberg, Petra Selmer, Andrés Taylor Paper here Also, the full formal semantic specification has been released Both will be available - and a blog - from the website soon!
- 14. oCIM 4 Tentative 21 - 23 May 2018 Beginning Monday lunchtime Ending Wednesday lunchtime More expansive schedule Proposed location: London / Berlin / Copenhagen Please let us know what you think!
- 15. Wednesday, 11 April 16:00 UTC Next oCIG… (oCIG 8)