Cypher

EBNF

Cypher = [SP], QueryOptions, Statement, [[SP], ';'], [SP], EOI ;

Statement = Command
          | Query
          ;

Command = CreateIndex
        | DropIndex
        | CreateUniqueConstraint
        | DropUniqueConstraint
        | CreateNodePropertyExistenceConstraint
        | DropNodePropertyExistenceConstraint
        | CreateRelationshipPropertyExistenceConstraint
        | DropRelationshipPropertyExistenceConstraint
        ;

CreateIndex = (C,R,E,A,T,E), SP, Index ;

DropIndex = (D,R,O,P), SP, Index ;

CreateUniqueConstraint = (C,R,E,A,T,E), SP, UniqueConstraint ;

DropUniqueConstraint = (D,R,O,P), SP, UniqueConstraint ;

CreateNodePropertyExistenceConstraint = (C,R,E,A,T,E), SP, NodePropertyExistenceConstraint ;

DropNodePropertyExistenceConstraint = (D,R,O,P), SP, NodePropertyExistenceConstraint ;

CreateRelationshipPropertyExistenceConstraint = (C,R,E,A,T,E), SP, RelationshipPropertyExistenceConstraint ;

DropRelationshipPropertyExistenceConstraint = (D,R,O,P), SP, RelationshipPropertyExistenceConstraint ;

Query = RegularQuery
      | StandaloneCall
      | BulkImportQuery
      ;

RegularQuery = SingleQuery, { [SP], Union } ;

SingleQuery = SinglePartQuery
            | MultiPartQuery
            ;

Union = ((U,N,I,O,N), SP, (A,L,L), [SP], SingleQuery)
      | ((U,N,I,O,N), [SP], SingleQuery)
      ;