openCypher Front End

Scala implementation of - parser - abstract syntax tree (AST) - semantic analysis - typing - scoping for openCypher queries, resulting in a normalised AST representation of the query string. See https://www.opencypher.org for more information on the openCypher project and query language.

License	Apache License, Version 2.0
GroupId	org.opencypher
ArtifactId	front-end-9.0
Last Version	9.0.20210312
Release Date	Mar 12, 2021
Type	jar
Description	openCypher Front End Scala implementation of - parser - abstract syntax tree (AST) - semantic analysis - typing - scoping for openCypher queries, resulting in a normalised AST representation of the query string. See https://www.opencypher.org for more information on the openCypher project and query language.
Source Code Management	https://github.com/openCypher/front-end

Download front-end-9.0

Filename	Size
front-end-9.0-9.0.20210312.pom
front-end-9.0-9.0.20210312.jar	288 KB
front-end-9.0-9.0.20210312-sources.jar	43 KB
front-end-9.0-9.0.20210312-javadoc.jar	496 KB

How to add to project

Apache Maven

<!-- https://jarcasting.com/artifacts/org.opencypher/front-end-9.0/ -->
<dependency>
    <groupId>org.opencypher</groupId>
    <artifactId>front-end-9.0</artifactId>
    <version>9.0.20210312</version>
</dependency>

Gradle Groovy

// https://jarcasting.com/artifacts/org.opencypher/front-end-9.0/
implementation 'org.opencypher:front-end-9.0:9.0.20210312'

Gradle Kotlin

// https://jarcasting.com/artifacts/org.opencypher/front-end-9.0/
implementation ("org.opencypher:front-end-9.0:9.0.20210312")

Apache Buildr

'org.opencypher:front-end-9.0:jar:9.0.20210312'

Apache Ivy

<dependency org="org.opencypher" name="front-end-9.0" rev="9.0.20210312">
  <artifact name="front-end-9.0" type="jar" />
</dependency>

Groovy Grape

@Grapes(
@Grab(group='org.opencypher', module='front-end-9.0', version='9.0.20210312')
)

Scala SBT

libraryDependencies += "org.opencypher" % "front-end-9.0" % "9.0.20210312"

Leiningen

[org.opencypher/front-end-9.0 "9.0.20210312"]

Dependencies

compile (9)

Group / Artifact	Type	Version
org.opencypher : util-9.0	jar	9.0.20210312
org.opencypher : cypher-macros-9.0	jar	9.0.20210312
org.opencypher : expressions-9.0	jar	9.0.20210312
org.opencypher : rewriting-9.0	jar	9.0.20210312
org.opencypher : parser-9.0	jar	9.0.20210312
org.scala-lang : scala-library	jar	2.12.7
org.scala-lang : scala-reflect	jar	2.12.7
org.parboiled : parboiled-scala_2.12	jar	1.2.0
org.apache.commons : commons-lang3	jar	3.7

test (13)

Group / Artifact	Type	Version
org.opencypher : rewriting-9.0	test-jar	9.0.20210312
org.opencypher : util-9.0	test-jar	9.0.20210312
org.opencypher : expressions-9.0	test-jar	9.0.20210312
org.opencypher : ast-9.0	test-jar	9.0.20210312
org.opencypher : parser-9.0	test-jar	9.0.20210312
org.opencypher : opencypher-cypher-ast-factory-9.0	jar	9.0.20210312
org.scalacheck : scalacheck_2.12	jar	1.14.0
com.lihaoyi : pprint_2.12	jar	0.5.3
junit : junit	jar	4.12
org.hamcrest : hamcrest-core	jar	1.3
org.hamcrest : hamcrest-library	jar	1.3
org.mockito : mockito-core	jar	2.18.3
org.scalatest : scalatest_2.12	jar	3.0.5

Project Modules

There are no modules declared in this project.

The Cypher Front End Modules

This repository holds a fully functional front end for the Cypher Property Graph Query Language. This includes a parser, an AST, semantic checking and analysis, and AST rewriting support. Its purpose is to assist anyone wanting to build tools, or working on implementing Cypher for database systems.

It is also the shared front end for Neo4j and Morpheus.

Overview of the included modules

• AST

  • Contains the AST classes (except expressions), and the semantic analysis.

• Expressions

  • This contains all expressions.

• Front End

  • This module contains a prettifier for the AST, and infrastructure data structures for compiler pipelines.

• Parser

  • Contains a parser for the Cypher Query Language.

• Rewriting

  • This contains a set of AST rewriters that simplify and canonicalize the tree before further processing.

• Util

  • Contains shared code and test utilities.

Why do the modules have the version number in the name?

A common feature for database systems is to allow backwards compatability for older releases of the software. This makes it possible to move over systems query by query to an updated version of the database. The names allow for two or more versions of compiler pipelines loaded at the same time. It makes it possible for us to release updated, binary incompatible versions of the front ends.

License

The openCypher project is licensed under the Apache license 2.0.

Neo4j

Versions

Version
9.0.20210312 Mar 12, 2021
9.0.20190305 Mar 5, 2019
9.0.20181129 Nov 29, 2018
9.0.20181030 Oct 30, 2018
9.0.20181012 Oct 12, 2018
9.0.20181009 Oct 9, 2018
9.0.20180928 Sep 28, 2018
9.0.20180925 Sep 25, 2018
9.0.20180914 Sep 14, 2018
9.0.8 Sep 13, 2018
9.0.7 Aug 23, 2018
9.0.6 Aug 14, 2018
9.0.5 Jul 25, 2018
9.0.4 Jul 20, 2018
9.0.3 Jun 15, 2018
9.0.2 Jun 12, 2018
9.0.1 May 28, 2018
1.0.0 May 16, 2018