FylmTM/Cypher_NoWS.g4

## Cypher_NoWS.g4
grammar Cypher;

cypher : allOptions statement ';'? ;

allOptions : ( anyCypherOption )* ;

anyCypherOption : cypherOption
                | explain
                | profile
                ;

cypherOption : CYPHER ( versionNumber )? ( configurationOption )* ;

versionNumber : digitString '.' digitString ;

explain : EXPLAIN ;

profile : PROFILE ;

configurationOption : symbolicNameString '=' symbolicNameString ;

statement : command
          | query
          ;

query : regularQuery
      | bulkImportQuery
      ;

regularQuery : singleQuery ( union )* ;

bulkImportQuery : periodicCommitHint loadCSVQuery ;

singleQuery : clause ( clause )* ;

periodicCommitHint : USING PERIODIC COMMIT ( signedIntegerLiteral )? ;

loadCSVQuery : loadCSV ( clause )* ;

union : ( UNION ALL singleQuery )
      | ( UNION singleQuery )
      ;

clause : loadCSV
       | start
       | match
       | unwind
       | merge
       | create
       | setClause
       | delete
       | remove
       | foreach
       | with
       | return
       ;

command : createUniqueConstraint
        | createNodePropertyExistenceConstraint
        | createRelationshipPropertyExistenceConstraint
        | createIndex
        | dropUniqueConstraint
        | dropNodePropertyExistenceConstraint
        | dropRelationshipPropertyExistenceConstraint
        | dropIndex
        ;

createUniqueConstraint : CREATE uniqueConstraintSyntax ;

createNodePropertyExistenceConstraint : CREATE nodePropertyExistenceConstraintSyntax ;

createRelationshipPropertyExistenceConstraint : CREATE relationshipPropertyExistenceConstraintSyntax ;

createIndex : CREATE INDEX ON nodeLabel '(' propertyKeyName ')' ;

dropUniqueConstraint : DROP uniqueConstraintSyntax ;

dropNodePropertyExistenceConstraint : DROP nodePropertyExistenceConstraintSyntax ;

dropRelationshipPropertyExistenceConstraint : DROP relationshipPropertyExistenceConstraintSyntax ;

dropIndex : DROP INDEX ON nodeLabel '(' propertyKeyName ')' ;

uniqueConstraintSyntax : CONSTRAINT ON '(' variable nodeLabel ')' ASSERT propertyExpression IS UNIQUE ;

nodePropertyExistenceConstraintSyntax : CONSTRAINT ON '(' variable nodeLabel ')' ASSERT EXISTS '(' propertyExpression ')' ;

relationshipPropertyExistenceConstraintSyntax : CONSTRAINT ON relationshipPatternSyntax ASSERT EXISTS '(' propertyExpression ')' ;

relationshipPatternSyntax : ( '(' ')' dash '[' variable relType ']' dash '(' ')' )
                          | ( '(' ')' dash '[' variable relType ']' rightArrowHead dash '(' ')' )
                          | ( '(' ')' leftArrowHead dash '[' variable relType ']' dash '(' ')' )
                          ;

loadCSV : LOAD CSV ( WITH HEADERS )? FROM expression AS variable ( FIELDTERMINATOR StringLiteral )? ;

match : ( OPTIONAL )? MATCH pattern ( hint )* where? ;

unwind : UNWIND expression AS variable ;

merge : MERGE patternPart ( mergeAction )* ;

mergeAction : ( ON MATCH setClause )
            | ( ON CREATE setClause )
            ;

create : ( CREATE UNIQUE pattern )
       | ( CREATE pattern )
       ;

setClause : SET setItem ( ',' setItem )* ;

setItem : ( propertyExpression '=' expression )
        | ( variable '=' expression )
        | ( variable '+=' expression )
        | ( variable nodeLabels )
        ;

delete : ( DELETE expression ( ',' expression )* )
       | ( DETACH DELETE expression ( ',' expression )* )
       ;

remove : REMOVE removeItem ( ',' removeItem )* ;

removeItem : ( variable nodeLabels )
           | propertyExpression
           ;

foreach : FOREACH '(' variable IN expression '|' ( clause )+ ')' ;

with : ( WITH DISTINCT returnBody where? )
     | ( WITH returnBody where? )
     ;

return : ( RETURN DISTINCT returnBody )
       | ( RETURN returnBody )
       ;

returnBody : returnItems ( order )? ( skip )? ( limit )? ;

returnItems : ( '*' ( ',' returnItem )* )
            | ( returnItem ( ',' returnItem )* )
            ;

returnItem : ( expression AS variable )
           | expression
           ;

order : ORDER BY sortItem ( ',' sortItem )* ;

skip : L_SKIP expression ;

limit : LIMIT expression ;

sortItem : ( expression ( DESCENDING | DESC ) )
         | ( expression ( ASCENDING | ASC )? )
         ;

hint : ( USING INDEX variable nodeLabel '(' propertyKeyName ')' )
     | ( USING JOIN ON variable ( ',' variable )* )
     | ( USING SCAN variable nodeLabel )
     ;

start : START startPoint ( ',' startPoint )* where? ;

startPoint : variable '=' lookup ;

lookup : nodeLookup
       | relationshipLookup
       ;

nodeLookup : NODE ( identifiedIndexLookup | indexQuery | idLookup ) ;

relationshipLookup : ( RELATIONSHIP | REL ) ( identifiedIndexLookup | indexQuery | idLookup ) ;

identifiedIndexLookup : ':' symbolicNameString '(' symbolicNameString '=' ( StringLiteral | parameter ) ')' ;

indexQuery : ':' symbolicNameString '(' ( StringLiteral | parameter ) ')' ;

idLookup : '(' ( literalIds | parameter | '*' ) ')' ;

literalIds : unsignedIntegerLiteral ( ',' unsignedIntegerLiteral )* ;

where : WHERE expression ;

pattern : patternPart ( ',' patternPart )* ;

patternPart : ( variable '=' anonymousPatternPart )
            | anonymousPatternPart
            ;

anonymousPatternPart : shortestPathPattern
                     | patternElement
                     ;

shortestPathPattern : ( SHORTESTPATH '(' patternElement ')' )
                    | ( ALLSHORTESTPATHS '(' patternElement ')' )
                    ;

patternElement : ( nodePattern ( patternElementChain )* )
               | ( '(' patternElement ')' )
               ;

nodePattern : '(' variable? nodeLabels? properties? ')' ;

patternElementChain : relationshipPattern nodePattern ;

relationshipPattern : ( leftArrowHead dash relationshipDetail? dash rightArrowHead )
                    | ( leftArrowHead dash relationshipDetail? dash )
                    | ( dash relationshipDetail? dash rightArrowHead )
                    | ( dash relationshipDetail? dash )
                    ;

relationshipDetail : '[' variable? '?'? relationshipTypes? ( '*' rangeLiteral? )? properties? ']' ;

properties : mapLiteral
           | parameter
           ;

relType : ':' relTypeName ;

relationshipTypes : ':' relTypeName ( '|' ':'? relTypeName )* ;

nodeLabels : nodeLabel ( nodeLabel )* ;

nodeLabel : ':' labelName ;

rangeLiteral : ( unsignedIntegerLiteral )? '..' ( unsignedIntegerLiteral )? ;

labelName : symbolicNameString ;

relTypeName : symbolicNameString ;

expression : expression12 ;

expression12 : expression11 ( OR expression11 )* ;

expression11 : expression10 ( XOR expression10 )* ;

expression10 : expression9 ( AND expression9 )* ;

expression9 : ( NOT expression9 )
            | expression8
            ;

expression8 : expression7 ( partialComparisonExpression )* ;

expression7 : expression6 ( ( '+' expression6 ) | ( '-' expression6 ) )* ;

expression6 : expression5 ( ( '*' expression5 ) | ( '/' expression5 ) | ( '%' expression5 ) )* ;

expression5 : expression4 ( '^' expression4 )* ;

expression4 : expression3
            | ( '+' expression3 )
            | ( '-' expression3 )
            ;

expression3 : expression2 ( ( '[' expression ']' )
            | ( '[' expression? '..' expression? ']' )
            | ( '=~' expression2 )
            | ( IN expression2 )
            | ( STARTS WITH expression2 )
            | ( ENDS WITH expression2 )
            | ( CONTAINS expression2 )
            | ( IS NULL )
            | ( IS NOT NULL ) )* ;

expression2 : expression1 ( propertyLookup | nodeLabels )* ;

expression1 : numberLiteral
            | StringLiteral
            | parameter
            | TRUE
            | FALSE
            | NULL
            | caseExpression
            | ( COUNT '(' '*' ')' )
            | mapLiteral
            | listComprehension
            | ( '[' expression ( ',' expression )* ']' )
            | ( FILTER '(' filterExpression ')' )
            | ( EXTRACT '(' filterExpression ( '|' expression )? ')' )
            | reduce
            | ( ALL '(' filterExpression ')' )
            | ( ANY '(' filterExpression ')' )
            | ( NONE '(' filterExpression ')' )
            | ( SINGLE '(' filterExpression ')' )
            | shortestPathPattern
            | relationshipsPattern
            | parenthesizedExpression
            | functionInvocation
            | variable
            ;

reduce : REDUCE '(' variable '=' expression ',' idInColl '|' expression ')' ;

partialComparisonExpression : ( '=' expression7 )
                            | ( '<>' expression7 )
                            | ( '!=' expression7 )
                            | ( '<' expression7 )
                            | ( '>' expression7 )
                            | ( '<=' expression7 )
                            | ( '>=' expression7 )
                            ;

parenthesizedExpression : '(' expression ')' ;

relationshipsPattern : nodePattern ( patternElementChain )+ ;

filterExpression : idInColl ( where )? ;

idInColl : variable IN expression ;

functionInvocation : functionName '(' DISTINCT? ( expression ( ',' expression )* )? ')' ;

functionName : symbolicNameString ;

listComprehension : '[' filterExpression ( '|' expression )? ']' ;

propertyLookup : '.' ( ( propertyKeyName ( '?' | '!' ) ) | propertyKeyName ) ;

caseExpression : ( ( CASE ( caseAlternatives )+ ) | ( CASE expression ( caseAlternatives )+ ) ) ( ELSE expression )? END ;

caseAlternatives : WHEN expression THEN expression ;

variable : symbolicNameString ;

StringLiteral : ( '"' ( StringLiteral_0 | EscapedChar )* '"' )
              | ( '\'' ( StringLiteral_1 | EscapedChar )* '\'' )
              ;

EscapedChar : '\\' ( '\\' | '\'' | '"' | ( 'B' | 'b' ) | ( 'F' | 'f' ) | ( 'N' | 'n' ) | ( 'R' | 'r' ) | ( 'T' | 't' ) | '_' | '%' | ( ( 'U' | 'u' ) ( HexDigit HexDigit HexDigit HexDigit ) ) | ( ( 'U' | 'u' ) ( HexDigit HexDigit HexDigit HexDigit HexDigit HexDigit HexDigit HexDigit ) ) ) ;

numberLiteral : doubleLiteral
              | signedIntegerLiteral
              ;

mapLiteral : '{' ( propertyKeyName ':' expression ( ',' propertyKeyName ':' expression )* )? '}' ;

parameter : '{' ( symbolicNameString | unsignedDecimalInteger ) '}' ;

propertyExpression : expression1 ( propertyLookup )+ ;

propertyKeyName : symbolicNameString ;

signedIntegerLiteral : hexInteger
                     | octalInteger
                     | decimalInteger
                     ;

unsignedIntegerLiteral : unsignedDecimalInteger ;

hexInteger : '-'? unsignedHexInteger ;

decimalInteger : '-'? unsignedDecimalInteger ;

octalInteger : '-'? unsignedOctalInteger ;

unsignedHexInteger : L_0X hexString ;

unsignedDecimalInteger : ( ( '1' | '2' | '3' | '4' | '5' | '6' | '7' | '8' | '9' ) digitString? )
                       | '0'
                       ;

unsignedOctalInteger : '0' octalString ;

hexString : ( HexDigit )+ ;

digitString : ( digit )+ ;

octalString : ( octDigit )+ ;

HexDigit : '0'
         | '1'
         | '2'
         | '3'
         | '4'
         | '5'
         | '6'
         | '7'
         | '8'
         | '9'
         | ( 'A' | 'a' )
         | ( 'B' | 'b' )
         | ( 'C' | 'c' )
         | ( 'D' | 'd' )
         | ( 'E' | 'e' )
         | ( 'F' | 'f' )
         ;

digit : '0'
      | '1'
      | '2'
      | '3'
      | '4'
      | '5'
      | '6'
      | '7'
      | '8'
      | '9'
      ;

octDigit : '0'
         | '1'
         | '2'
         | '3'
         | '4'
         | '5'
         | '6'
         | '7'
         ;

doubleLiteral : exponentDecimalReal
              | regularDecimalReal
              ;

exponentDecimalReal : '-'? ( digit | '.' )+ ( ( 'E' | 'e' ) | ( 'E' | 'e' ) ) '-'? digitString ;

regularDecimalReal : '-'? ( digit )* '.' digitString ;

symbolicNameString : UnescapedSymbolicNameString
                   | EscapedSymbolicNameString
                   | CYPHER
                   | EXPLAIN
                   | PROFILE
                   | USING
                   | PERIODIC
                   | COMMIT
                   | UNION
                   | ALL
                   | CREATE
                   | INDEX
                   | ON
                   | DROP
                   | CONSTRAINT
                   | ASSERT
                   | IS
                   | UNIQUE
                   | EXISTS
                   | LOAD
                   | CSV
                   | WITH
                   | HEADERS
                   | FROM
                   | AS
                   | FIELDTERMINATOR
                   | OPTIONAL
                   | MATCH
                   | UNWIND
                   | MERGE
                   | SET
                   | DELETE
                   | DETACH
                   | REMOVE
                   | FOREACH
                   | IN
                   | DISTINCT
                   | RETURN
                   | ORDER
                   | BY
                   | L_SKIP
                   | LIMIT
                   | DESCENDING
                   | DESC
                   | ASCENDING
                   | ASC
                   | JOIN
                   | SCAN
                   | START
                   | NODE
                   | RELATIONSHIP
                   | REL
                   | WHERE
                   | SHORTESTPATH
                   | ALLSHORTESTPATHS
                   | OR
                   | XOR
                   | AND
                   | NOT
                   | STARTS
                   | ENDS
                   | CONTAINS
                   | NULL
                   | TRUE
                   | FALSE
                   | COUNT
                   | FILTER
                   | EXTRACT
                   | ANY
                   | NONE
                   | SINGLE
                   | REDUCE
                   | CASE
                   | ELSE
                   | END
                   | WHEN
                   | THEN
                   | L_0X
                   | HexDigit
                   ;

CYPHER : ( 'C' | 'c' ) ( 'Y' | 'y' ) ( 'P' | 'p' ) ( 'H' | 'h' ) ( 'E' | 'e' ) ( 'R' | 'r' )  ;

EXPLAIN : ( 'E' | 'e' ) ( 'X' | 'x' ) ( 'P' | 'p' ) ( 'L' | 'l' ) ( 'A' | 'a' ) ( 'I' | 'i' ) ( 'N' | 'n' )  ;

PROFILE : ( 'P' | 'p' ) ( 'R' | 'r' ) ( 'O' | 'o' ) ( 'F' | 'f' ) ( 'I' | 'i' ) ( 'L' | 'l' ) ( 'E' | 'e' )  ;

USING : ( 'U' | 'u' ) ( 'S' | 's' ) ( 'I' | 'i' ) ( 'N' | 'n' ) ( 'G' | 'g' )  ;

PERIODIC : ( 'P' | 'p' ) ( 'E' | 'e' ) ( 'R' | 'r' ) ( 'I' | 'i' ) ( 'O' | 'o' ) ( 'D' | 'd' ) ( 'I' | 'i' ) ( 'C' | 'c' )  ;

COMMIT : ( 'C' | 'c' ) ( 'O' | 'o' ) ( 'M' | 'm' ) ( 'M' | 'm' ) ( 'I' | 'i' ) ( 'T' | 't' )  ;

UNION : ( 'U' | 'u' ) ( 'N' | 'n' ) ( 'I' | 'i' ) ( 'O' | 'o' ) ( 'N' | 'n' )  ;

ALL : ( 'A' | 'a' ) ( 'L' | 'l' ) ( 'L' | 'l' )  ;

CREATE : ( 'C' | 'c' ) ( 'R' | 'r' ) ( 'E' | 'e' ) ( 'A' | 'a' ) ( 'T' | 't' ) ( 'E' | 'e' )  ;

INDEX : ( 'I' | 'i' ) ( 'N' | 'n' ) ( 'D' | 'd' ) ( 'E' | 'e' ) ( 'X' | 'x' )  ;

ON : ( 'O' | 'o' ) ( 'N' | 'n' )  ;

DROP : ( 'D' | 'd' ) ( 'R' | 'r' ) ( 'O' | 'o' ) ( 'P' | 'p' )  ;

CONSTRAINT : ( 'C' | 'c' ) ( 'O' | 'o' ) ( 'N' | 'n' ) ( 'S' | 's' ) ( 'T' | 't' ) ( 'R' | 'r' ) ( 'A' | 'a' ) ( 'I' | 'i' ) ( 'N' | 'n' ) ( 'T' | 't' )  ;

ASSERT : ( 'A' | 'a' ) ( 'S' | 's' ) ( 'S' | 's' ) ( 'E' | 'e' ) ( 'R' | 'r' ) ( 'T' | 't' )  ;

IS : ( 'I' | 'i' ) ( 'S' | 's' )  ;

UNIQUE : ( 'U' | 'u' ) ( 'N' | 'n' ) ( 'I' | 'i' ) ( 'Q' | 'q' ) ( 'U' | 'u' ) ( 'E' | 'e' )  ;

EXISTS : ( 'E' | 'e' ) ( 'X' | 'x' ) ( 'I' | 'i' ) ( 'S' | 's' ) ( 'T' | 't' ) ( 'S' | 's' )  ;

LOAD : ( 'L' | 'l' ) ( 'O' | 'o' ) ( 'A' | 'a' ) ( 'D' | 'd' )  ;

CSV : ( 'C' | 'c' ) ( 'S' | 's' ) ( 'V' | 'v' )  ;

WITH : ( 'W' | 'w' ) ( 'I' | 'i' ) ( 'T' | 't' ) ( 'H' | 'h' )  ;

HEADERS : ( 'H' | 'h' ) ( 'E' | 'e' ) ( 'A' | 'a' ) ( 'D' | 'd' ) ( 'E' | 'e' ) ( 'R' | 'r' ) ( 'S' | 's' )  ;

FROM : ( 'F' | 'f' ) ( 'R' | 'r' ) ( 'O' | 'o' ) ( 'M' | 'm' )  ;

AS : ( 'A' | 'a' ) ( 'S' | 's' )  ;

FIELDTERMINATOR : ( 'F' | 'f' ) ( 'I' | 'i' ) ( 'E' | 'e' ) ( 'L' | 'l' ) ( 'D' | 'd' ) ( 'T' | 't' ) ( 'E' | 'e' ) ( 'R' | 'r' ) ( 'M' | 'm' ) ( 'I' | 'i' ) ( 'N' | 'n' ) ( 'A' | 'a' ) ( 'T' | 't' ) ( 'O' | 'o' ) ( 'R' | 'r' )  ;

OPTIONAL : ( 'O' | 'o' ) ( 'P' | 'p' ) ( 'T' | 't' ) ( 'I' | 'i' ) ( 'O' | 'o' ) ( 'N' | 'n' ) ( 'A' | 'a' ) ( 'L' | 'l' )  ;

MATCH : ( 'M' | 'm' ) ( 'A' | 'a' ) ( 'T' | 't' ) ( 'C' | 'c' ) ( 'H' | 'h' )  ;

UNWIND : ( 'U' | 'u' ) ( 'N' | 'n' ) ( 'W' | 'w' ) ( 'I' | 'i' ) ( 'N' | 'n' ) ( 'D' | 'd' )  ;

MERGE : ( 'M' | 'm' ) ( 'E' | 'e' ) ( 'R' | 'r' ) ( 'G' | 'g' ) ( 'E' | 'e' )  ;

SET : ( 'S' | 's' ) ( 'E' | 'e' ) ( 'T' | 't' )  ;

DELETE : ( 'D' | 'd' ) ( 'E' | 'e' ) ( 'L' | 'l' ) ( 'E' | 'e' ) ( 'T' | 't' ) ( 'E' | 'e' )  ;

DETACH : ( 'D' | 'd' ) ( 'E' | 'e' ) ( 'T' | 't' ) ( 'A' | 'a' ) ( 'C' | 'c' ) ( 'H' | 'h' )  ;

REMOVE : ( 'R' | 'r' ) ( 'E' | 'e' ) ( 'M' | 'm' ) ( 'O' | 'o' ) ( 'V' | 'v' ) ( 'E' | 'e' )  ;

FOREACH : ( 'F' | 'f' ) ( 'O' | 'o' ) ( 'R' | 'r' ) ( 'E' | 'e' ) ( 'A' | 'a' ) ( 'C' | 'c' ) ( 'H' | 'h' )  ;

IN : ( 'I' | 'i' ) ( 'N' | 'n' )  ;

DISTINCT : ( 'D' | 'd' ) ( 'I' | 'i' ) ( 'S' | 's' ) ( 'T' | 't' ) ( 'I' | 'i' ) ( 'N' | 'n' ) ( 'C' | 'c' ) ( 'T' | 't' )  ;

RETURN : ( 'R' | 'r' ) ( 'E' | 'e' ) ( 'T' | 't' ) ( 'U' | 'u' ) ( 'R' | 'r' ) ( 'N' | 'n' )  ;

ORDER : ( 'O' | 'o' ) ( 'R' | 'r' ) ( 'D' | 'd' ) ( 'E' | 'e' ) ( 'R' | 'r' )  ;

BY : ( 'B' | 'b' ) ( 'Y' | 'y' )  ;

L_SKIP : ( 'S' | 's' ) ( 'K' | 'k' ) ( 'I' | 'i' ) ( 'P' | 'p' )  ;

LIMIT : ( 'L' | 'l' ) ( 'I' | 'i' ) ( 'M' | 'm' ) ( 'I' | 'i' ) ( 'T' | 't' )  ;

DESCENDING : ( 'D' | 'd' ) ( 'E' | 'e' ) ( 'S' | 's' ) ( 'C' | 'c' ) ( 'E' | 'e' ) ( 'N' | 'n' ) ( 'D' | 'd' ) ( 'I' | 'i' ) ( 'N' | 'n' ) ( 'G' | 'g' )  ;

DESC : ( 'D' | 'd' ) ( 'E' | 'e' ) ( 'S' | 's' ) ( 'C' | 'c' )  ;

ASCENDING : ( 'A' | 'a' ) ( 'S' | 's' ) ( 'C' | 'c' ) ( 'E' | 'e' ) ( 'N' | 'n' ) ( 'D' | 'd' ) ( 'I' | 'i' ) ( 'N' | 'n' ) ( 'G' | 'g' )  ;

ASC : ( 'A' | 'a' ) ( 'S' | 's' ) ( 'C' | 'c' )  ;

JOIN : ( 'J' | 'j' ) ( 'O' | 'o' ) ( 'I' | 'i' ) ( 'N' | 'n' )  ;

SCAN : ( 'S' | 's' ) ( 'C' | 'c' ) ( 'A' | 'a' ) ( 'N' | 'n' )  ;

START : ( 'S' | 's' ) ( 'T' | 't' ) ( 'A' | 'a' ) ( 'R' | 'r' ) ( 'T' | 't' )  ;

NODE : ( 'N' | 'n' ) ( 'O' | 'o' ) ( 'D' | 'd' ) ( 'E' | 'e' )  ;

RELATIONSHIP : ( 'R' | 'r' ) ( 'E' | 'e' ) ( 'L' | 'l' ) ( 'A' | 'a' ) ( 'T' | 't' ) ( 'I' | 'i' ) ( 'O' | 'o' ) ( 'N' | 'n' ) ( 'S' | 's' ) ( 'H' | 'h' ) ( 'I' | 'i' ) ( 'P' | 'p' )  ;

REL : ( 'R' | 'r' ) ( 'E' | 'e' ) ( 'L' | 'l' )  ;

WHERE : ( 'W' | 'w' ) ( 'H' | 'h' ) ( 'E' | 'e' ) ( 'R' | 'r' ) ( 'E' | 'e' )  ;

SHORTESTPATH : ( 'S' | 's' ) ( 'H' | 'h' ) ( 'O' | 'o' ) ( 'R' | 'r' ) ( 'T' | 't' ) ( 'E' | 'e' ) ( 'S' | 's' ) ( 'T' | 't' ) ( 'P' | 'p' ) ( 'A' | 'a' ) ( 'T' | 't' ) ( 'H' | 'h' )  ;

ALLSHORTESTPATHS : ( 'A' | 'a' ) ( 'L' | 'l' ) ( 'L' | 'l' ) ( 'S' | 's' ) ( 'H' | 'h' ) ( 'O' | 'o' ) ( 'R' | 'r' ) ( 'T' | 't' ) ( 'E' | 'e' ) ( 'S' | 's' ) ( 'T' | 't' ) ( 'P' | 'p' ) ( 'A' | 'a' ) ( 'T' | 't' ) ( 'H' | 'h' ) ( 'S' | 's' )  ;

OR : ( 'O' | 'o' ) ( 'R' | 'r' )  ;

XOR : ( 'X' | 'x' ) ( 'O' | 'o' ) ( 'R' | 'r' )  ;

AND : ( 'A' | 'a' ) ( 'N' | 'n' ) ( 'D' | 'd' )  ;

NOT : ( 'N' | 'n' ) ( 'O' | 'o' ) ( 'T' | 't' )  ;

STARTS : ( 'S' | 's' ) ( 'T' | 't' ) ( 'A' | 'a' ) ( 'R' | 'r' ) ( 'T' | 't' ) ( 'S' | 's' )  ;

ENDS : ( 'E' | 'e' ) ( 'N' | 'n' ) ( 'D' | 'd' ) ( 'S' | 's' )  ;

CONTAINS : ( 'C' | 'c' ) ( 'O' | 'o' ) ( 'N' | 'n' ) ( 'T' | 't' ) ( 'A' | 'a' ) ( 'I' | 'i' ) ( 'N' | 'n' ) ( 'S' | 's' )  ;

NULL : ( 'N' | 'n' ) ( 'U' | 'u' ) ( 'L' | 'l' ) ( 'L' | 'l' )  ;

TRUE : ( 'T' | 't' ) ( 'R' | 'r' ) ( 'U' | 'u' ) ( 'E' | 'e' )  ;

FALSE : ( 'F' | 'f' ) ( 'A' | 'a' ) ( 'L' | 'l' ) ( 'S' | 's' ) ( 'E' | 'e' )  ;

COUNT : ( 'C' | 'c' ) ( 'O' | 'o' ) ( 'U' | 'u' ) ( 'N' | 'n' ) ( 'T' | 't' )  ;

FILTER : ( 'F' | 'f' ) ( 'I' | 'i' ) ( 'L' | 'l' ) ( 'T' | 't' ) ( 'E' | 'e' ) ( 'R' | 'r' )  ;

EXTRACT : ( 'E' | 'e' ) ( 'X' | 'x' ) ( 'T' | 't' ) ( 'R' | 'r' ) ( 'A' | 'a' ) ( 'C' | 'c' ) ( 'T' | 't' )  ;

ANY : ( 'A' | 'a' ) ( 'N' | 'n' ) ( 'Y' | 'y' )  ;

NONE : ( 'N' | 'n' ) ( 'O' | 'o' ) ( 'N' | 'n' ) ( 'E' | 'e' )  ;

SINGLE : ( 'S' | 's' ) ( 'I' | 'i' ) ( 'N' | 'n' ) ( 'G' | 'g' ) ( 'L' | 'l' ) ( 'E' | 'e' )  ;

REDUCE : ( 'R' | 'r' ) ( 'E' | 'e' ) ( 'D' | 'd' ) ( 'U' | 'u' ) ( 'C' | 'c' ) ( 'E' | 'e' )  ;

CASE : ( 'C' | 'c' ) ( 'A' | 'a' ) ( 'S' | 's' ) ( 'E' | 'e' )  ;

ELSE : ( 'E' | 'e' ) ( 'L' | 'l' ) ( 'S' | 's' ) ( 'E' | 'e' )  ;

END : ( 'E' | 'e' ) ( 'N' | 'n' ) ( 'D' | 'd' )  ;

WHEN : ( 'W' | 'w' ) ( 'H' | 'h' ) ( 'E' | 'e' ) ( 'N' | 'n' )  ;

THEN : ( 'T' | 't' ) ( 'H' | 'h' ) ( 'E' | 'e' ) ( 'N' | 'n' )  ;

L_0X : ( '0' | '0' ) ( 'X' | 'x' )  ;

UnescapedSymbolicNameString : IdentifierStart ( IdentifierPart )* ;

/**
 * Based on the unicode identifier and pattern syntax
 *   (http://www.unicode.org/reports/tr31/)
 * And extended with a few characters.
 */

IdentifierStart : ID_Start
                | Sc
                | '_'
                | '‿'
                | '⁀'
                | '⁔'
                | '︳'
                | '︴'
                | '﹍'
                | '﹎'
                | '﹏'
                | '＿'
                ;

/**
 * Based on the unicode identifier and pattern syntax
 *   (http://www.unicode.org/reports/tr31/)
 * And extended with a few characters.
 */
IdentifierPart : ID_Continue
               | Sc
               ;

/**
 * Any character except "`", enclosed within `backticks`. Backticks are escaped with double backticks. */
EscapedSymbolicNameString : ( '`' ( EscapedSymbolicNameString_0 )* '`' )+ ;

WS : WHITESPACE+ -> channel(HIDDEN);

WHITESPACE : SPACE
           | TAB
           | LF
           | VT
           | FF
           | CR
           | FS
           | GS
           | RS
           | US
           | ' '
           | '᠎'
           | ' '
           | ' '
           | ' '
           | ' '
           | ' '
           | ' '
           | ' '
           | ' '
           | ' '
           | ' '
           | ' '
           | ' '
           | ' '
           | '　'
           | ' '
           | ' '
           | ' '
           | Comment
           ;

Comment : ( '/*' ( Comment_0 | ( '*' Comment_1 ) )* '*/' )
        | ( '//' Comment_2 CR? ( LF | EOF ) )
        ;

leftArrowHead : '<'
              | '⟨'
              | '〈'
              | '﹤'
              | '＜'
              ;

rightArrowHead : '>'
               | '⟩'
               | '〉'
               | '﹥'
               | '＞'
               ;

dash : '-'
     | ''
     | '‐'
     | '‑'
     | '‒'
     | '–'
     | '—'
     | '―'
     | '−'
     | '﹘'
     | '﹣'
     | '－'
     ;
	grammar Cypher;

	cypher : allOptions statement ';'? ;

	allOptions : ( anyCypherOption )* ;

	anyCypherOption : cypherOption
	\| explain
	\| profile
	;

	cypherOption : CYPHER ( versionNumber )? ( configurationOption )* ;

	versionNumber : digitString '.' digitString ;

	explain : EXPLAIN ;

	profile : PROFILE ;

	configurationOption : symbolicNameString '=' symbolicNameString ;

	statement : command
	\| query
	;

	query : regularQuery
	\| bulkImportQuery
	;

	regularQuery : singleQuery ( union )* ;

	bulkImportQuery : periodicCommitHint loadCSVQuery ;

	singleQuery : clause ( clause )* ;

	periodicCommitHint : USING PERIODIC COMMIT ( signedIntegerLiteral )? ;

	loadCSVQuery : loadCSV ( clause )* ;

	union : ( UNION ALL singleQuery )
	\| ( UNION singleQuery )
	;

	clause : loadCSV
	\| start
	\| match
	\| unwind
	\| merge
	\| create
	\| setClause
	\| delete
	\| remove
	\| foreach
	\| with
	\| return
	;

	command : createUniqueConstraint
	\| createNodePropertyExistenceConstraint
	\| createRelationshipPropertyExistenceConstraint
	\| createIndex
	\| dropUniqueConstraint
	\| dropNodePropertyExistenceConstraint
	\| dropRelationshipPropertyExistenceConstraint
	\| dropIndex
	;

	createUniqueConstraint : CREATE uniqueConstraintSyntax ;

	createNodePropertyExistenceConstraint : CREATE nodePropertyExistenceConstraintSyntax ;

	createRelationshipPropertyExistenceConstraint : CREATE relationshipPropertyExistenceConstraintSyntax ;

	createIndex : CREATE INDEX ON nodeLabel '(' propertyKeyName ')' ;

	dropUniqueConstraint : DROP uniqueConstraintSyntax ;

	dropNodePropertyExistenceConstraint : DROP nodePropertyExistenceConstraintSyntax ;

	dropRelationshipPropertyExistenceConstraint : DROP relationshipPropertyExistenceConstraintSyntax ;

	dropIndex : DROP INDEX ON nodeLabel '(' propertyKeyName ')' ;

	uniqueConstraintSyntax : CONSTRAINT ON '(' variable nodeLabel ')' ASSERT propertyExpression IS UNIQUE ;

	nodePropertyExistenceConstraintSyntax : CONSTRAINT ON '(' variable nodeLabel ')' ASSERT EXISTS '(' propertyExpression ')' ;

	relationshipPropertyExistenceConstraintSyntax : CONSTRAINT ON relationshipPatternSyntax ASSERT EXISTS '(' propertyExpression ')' ;

	relationshipPatternSyntax : ( '(' ')' dash '[' variable relType ']' dash '(' ')' )
	\| ( '(' ')' dash '[' variable relType ']' rightArrowHead dash '(' ')' )
	\| ( '(' ')' leftArrowHead dash '[' variable relType ']' dash '(' ')' )
	;

	loadCSV : LOAD CSV ( WITH HEADERS )? FROM expression AS variable ( FIELDTERMINATOR StringLiteral )? ;

	match : ( OPTIONAL )? MATCH pattern ( hint )* where? ;

	unwind : UNWIND expression AS variable ;

	merge : MERGE patternPart ( mergeAction )* ;

	mergeAction : ( ON MATCH setClause )
	\| ( ON CREATE setClause )
	;

	create : ( CREATE UNIQUE pattern )
	\| ( CREATE pattern )
	;

	setClause : SET setItem ( ',' setItem )* ;

	setItem : ( propertyExpression '=' expression )
	\| ( variable '=' expression )
	\| ( variable '+=' expression )
	\| ( variable nodeLabels )
	;

	delete : ( DELETE expression ( ',' expression )* )
	\| ( DETACH DELETE expression ( ',' expression )* )
	;

	remove : REMOVE removeItem ( ',' removeItem )* ;

	removeItem : ( variable nodeLabels )
	\| propertyExpression
	;

	foreach : FOREACH '(' variable IN expression '\|' ( clause )+ ')' ;

	with : ( WITH DISTINCT returnBody where? )
	\| ( WITH returnBody where? )
	;

	return : ( RETURN DISTINCT returnBody )
	\| ( RETURN returnBody )
	;

	returnBody : returnItems ( order )? ( skip )? ( limit )? ;

	returnItems : ( '' ( ',' returnItem ) )
	\| ( returnItem ( ',' returnItem )* )
	;

	returnItem : ( expression AS variable )
	\| expression
	;

	order : ORDER BY sortItem ( ',' sortItem )* ;

	skip : L_SKIP expression ;

	limit : LIMIT expression ;

	sortItem : ( expression ( DESCENDING \| DESC ) )
	\| ( expression ( ASCENDING \| ASC )? )
	;

	hint : ( USING INDEX variable nodeLabel '(' propertyKeyName ')' )
	\| ( USING JOIN ON variable ( ',' variable )* )
	\| ( USING SCAN variable nodeLabel )
	;

	start : START startPoint ( ',' startPoint )* where? ;

	startPoint : variable '=' lookup ;

	lookup : nodeLookup
	\| relationshipLookup
	;

	nodeLookup : NODE ( identifiedIndexLookup \| indexQuery \| idLookup ) ;

	relationshipLookup : ( RELATIONSHIP \| REL ) ( identifiedIndexLookup \| indexQuery \| idLookup ) ;

	identifiedIndexLookup : ':' symbolicNameString '(' symbolicNameString '=' ( StringLiteral \| parameter ) ')' ;

	indexQuery : ':' symbolicNameString '(' ( StringLiteral \| parameter ) ')' ;

	idLookup : '(' ( literalIds \| parameter \| '*' ) ')' ;

	literalIds : unsignedIntegerLiteral ( ',' unsignedIntegerLiteral )* ;

	where : WHERE expression ;

	pattern : patternPart ( ',' patternPart )* ;

	patternPart : ( variable '=' anonymousPatternPart )
	\| anonymousPatternPart
	;

	anonymousPatternPart : shortestPathPattern
	\| patternElement
	;

	shortestPathPattern : ( SHORTESTPATH '(' patternElement ')' )
	\| ( ALLSHORTESTPATHS '(' patternElement ')' )
	;

	patternElement : ( nodePattern ( patternElementChain )* )
	\| ( '(' patternElement ')' )
	;

	nodePattern : '(' variable? nodeLabels? properties? ')' ;

	patternElementChain : relationshipPattern nodePattern ;

	relationshipPattern : ( leftArrowHead dash relationshipDetail? dash rightArrowHead )
	\| ( leftArrowHead dash relationshipDetail? dash )
	\| ( dash relationshipDetail? dash rightArrowHead )
	\| ( dash relationshipDetail? dash )
	;

	relationshipDetail : '[' variable? '?'? relationshipTypes? ( '*' rangeLiteral? )? properties? ']' ;

	properties : mapLiteral
	\| parameter
	;

	relType : ':' relTypeName ;

	relationshipTypes : ':' relTypeName ( '\|' ':'? relTypeName )* ;

	nodeLabels : nodeLabel ( nodeLabel )* ;

	nodeLabel : ':' labelName ;

	rangeLiteral : ( unsignedIntegerLiteral )? '..' ( unsignedIntegerLiteral )? ;

	labelName : symbolicNameString ;

	relTypeName : symbolicNameString ;

	expression : expression12 ;

	expression12 : expression11 ( OR expression11 )* ;

	expression11 : expression10 ( XOR expression10 )* ;

	expression10 : expression9 ( AND expression9 )* ;

	expression9 : ( NOT expression9 )
	\| expression8
	;

	expression8 : expression7 ( partialComparisonExpression )* ;

	expression7 : expression6 ( ( '+' expression6 ) \| ( '-' expression6 ) )* ;

	expression6 : expression5 ( ( '' expression5 ) \| ( '/' expression5 ) \| ( '%' expression5 ) ) ;

	expression5 : expression4 ( '^' expression4 )* ;

	expression4 : expression3
	\| ( '+' expression3 )
	\| ( '-' expression3 )
	;

	expression3 : expression2 ( ( '[' expression ']' )
	\| ( '[' expression? '..' expression? ']' )
	\| ( '=~' expression2 )
	\| ( IN expression2 )
	\| ( STARTS WITH expression2 )
	\| ( ENDS WITH expression2 )
	\| ( CONTAINS expression2 )
	\| ( IS NULL )
	\| ( IS NOT NULL ) )* ;

	expression2 : expression1 ( propertyLookup \| nodeLabels )* ;

	expression1 : numberLiteral
	\| StringLiteral
	\| parameter
	\| TRUE
	\| FALSE
	\| NULL
	\| caseExpression
	\| ( COUNT '(' '*' ')' )
	\| mapLiteral
	\| listComprehension
	\| ( '[' expression ( ',' expression )* ']' )
	\| ( FILTER '(' filterExpression ')' )
	\| ( EXTRACT '(' filterExpression ( '\|' expression )? ')' )
	\| reduce
	\| ( ALL '(' filterExpression ')' )
	\| ( ANY '(' filterExpression ')' )
	\| ( NONE '(' filterExpression ')' )
	\| ( SINGLE '(' filterExpression ')' )
	\| shortestPathPattern
	\| relationshipsPattern
	\| parenthesizedExpression
	\| functionInvocation
	\| variable
	;

	reduce : REDUCE '(' variable '=' expression ',' idInColl '\|' expression ')' ;

	partialComparisonExpression : ( '=' expression7 )
	\| ( '<>' expression7 )
	\| ( '!=' expression7 )
	\| ( '<' expression7 )
	\| ( '>' expression7 )
	\| ( '<=' expression7 )
	\| ( '>=' expression7 )
	;

	parenthesizedExpression : '(' expression ')' ;

	relationshipsPattern : nodePattern ( patternElementChain )+ ;

	filterExpression : idInColl ( where )? ;

	idInColl : variable IN expression ;

	functionInvocation : functionName '(' DISTINCT? ( expression ( ',' expression )* )? ')' ;

	functionName : symbolicNameString ;

	listComprehension : '[' filterExpression ( '\|' expression )? ']' ;

	propertyLookup : '.' ( ( propertyKeyName ( '?' \| '!' ) ) \| propertyKeyName ) ;

	caseExpression : ( ( CASE ( caseAlternatives )+ ) \| ( CASE expression ( caseAlternatives )+ ) ) ( ELSE expression )? END ;

	caseAlternatives : WHEN expression THEN expression ;

	variable : symbolicNameString ;

	StringLiteral : ( '"' ( StringLiteral_0 \| EscapedChar )* '"' )
	\| ( '\'' ( StringLiteral_1 \| EscapedChar )* '\'' )
	;

	EscapedChar : '\\' ( '\\' \| '\'' \| '"' \| ( 'B' \| 'b' ) \| ( 'F' \| 'f' ) \| ( 'N' \| 'n' ) \| ( 'R' \| 'r' ) \| ( 'T' \| 't' ) \| '_' \| '%' \| ( ( 'U' \| 'u' ) ( HexDigit HexDigit HexDigit HexDigit ) ) \| ( ( 'U' \| 'u' ) ( HexDigit HexDigit HexDigit HexDigit HexDigit HexDigit HexDigit HexDigit ) ) ) ;

	numberLiteral : doubleLiteral
	\| signedIntegerLiteral
	;

	mapLiteral : '{' ( propertyKeyName ':' expression ( ',' propertyKeyName ':' expression )* )? '}' ;

	parameter : '{' ( symbolicNameString \| unsignedDecimalInteger ) '}' ;

	propertyExpression : expression1 ( propertyLookup )+ ;

	propertyKeyName : symbolicNameString ;

	signedIntegerLiteral : hexInteger
	\| octalInteger
	\| decimalInteger
	;

	unsignedIntegerLiteral : unsignedDecimalInteger ;

	hexInteger : '-'? unsignedHexInteger ;

	decimalInteger : '-'? unsignedDecimalInteger ;

	octalInteger : '-'? unsignedOctalInteger ;

	unsignedHexInteger : L_0X hexString ;

	unsignedDecimalInteger : ( ( '1' \| '2' \| '3' \| '4' \| '5' \| '6' \| '7' \| '8' \| '9' ) digitString? )
	\| '0'
	;

	unsignedOctalInteger : '0' octalString ;

	hexString : ( HexDigit )+ ;

	digitString : ( digit )+ ;

	octalString : ( octDigit )+ ;

	HexDigit : '0'
	\| '1'
	\| '2'
	\| '3'
	\| '4'
	\| '5'
	\| '6'
	\| '7'
	\| '8'
	\| '9'
	\| ( 'A' \| 'a' )
	\| ( 'B' \| 'b' )
	\| ( 'C' \| 'c' )
	\| ( 'D' \| 'd' )
	\| ( 'E' \| 'e' )
	\| ( 'F' \| 'f' )
	;

	digit : '0'
	\| '1'
	\| '2'
	\| '3'
	\| '4'
	\| '5'
	\| '6'
	\| '7'
	\| '8'
	\| '9'
	;

	octDigit : '0'
	\| '1'
	\| '2'
	\| '3'
	\| '4'
	\| '5'
	\| '6'
	\| '7'
	;

	doubleLiteral : exponentDecimalReal
	\| regularDecimalReal
	;

	exponentDecimalReal : '-'? ( digit \| '.' )+ ( ( 'E' \| 'e' ) \| ( 'E' \| 'e' ) ) '-'? digitString ;

	regularDecimalReal : '-'? ( digit )* '.' digitString ;

	symbolicNameString : UnescapedSymbolicNameString
	\| EscapedSymbolicNameString
	\| CYPHER
	\| EXPLAIN
	\| PROFILE
	\| USING
	\| PERIODIC
	\| COMMIT
	\| UNION
	\| ALL
	\| CREATE
	\| INDEX
	\| ON
	\| DROP
	\| CONSTRAINT
	\| ASSERT
	\| IS
	\| UNIQUE
	\| EXISTS
	\| LOAD
	\| CSV
	\| WITH
	\| HEADERS
	\| FROM
	\| AS
	\| FIELDTERMINATOR
	\| OPTIONAL
	\| MATCH
	\| UNWIND
	\| MERGE
	\| SET
	\| DELETE
	\| DETACH
	\| REMOVE
	\| FOREACH
	\| IN
	\| DISTINCT
	\| RETURN
	\| ORDER
	\| BY
	\| L_SKIP
	\| LIMIT
	\| DESCENDING
	\| DESC
	\| ASCENDING
	\| ASC
	\| JOIN
	\| SCAN
	\| START
	\| NODE
	\| RELATIONSHIP
	\| REL
	\| WHERE
	\| SHORTESTPATH
	\| ALLSHORTESTPATHS
	\| OR
	\| XOR
	\| AND
	\| NOT
	\| STARTS
	\| ENDS
	\| CONTAINS
	\| NULL
	\| TRUE
	\| FALSE
	\| COUNT
	\| FILTER
	\| EXTRACT
	\| ANY
	\| NONE
	\| SINGLE
	\| REDUCE
	\| CASE
	\| ELSE
	\| END
	\| WHEN
	\| THEN
	\| L_0X
	\| HexDigit
	;

	CYPHER : ( 'C' \| 'c' ) ( 'Y' \| 'y' ) ( 'P' \| 'p' ) ( 'H' \| 'h' ) ( 'E' \| 'e' ) ( 'R' \| 'r' ) ;

	EXPLAIN : ( 'E' \| 'e' ) ( 'X' \| 'x' ) ( 'P' \| 'p' ) ( 'L' \| 'l' ) ( 'A' \| 'a' ) ( 'I' \| 'i' ) ( 'N' \| 'n' ) ;

	PROFILE : ( 'P' \| 'p' ) ( 'R' \| 'r' ) ( 'O' \| 'o' ) ( 'F' \| 'f' ) ( 'I' \| 'i' ) ( 'L' \| 'l' ) ( 'E' \| 'e' ) ;

	USING : ( 'U' \| 'u' ) ( 'S' \| 's' ) ( 'I' \| 'i' ) ( 'N' \| 'n' ) ( 'G' \| 'g' ) ;

	PERIODIC : ( 'P' \| 'p' ) ( 'E' \| 'e' ) ( 'R' \| 'r' ) ( 'I' \| 'i' ) ( 'O' \| 'o' ) ( 'D' \| 'd' ) ( 'I' \| 'i' ) ( 'C' \| 'c' ) ;

	COMMIT : ( 'C' \| 'c' ) ( 'O' \| 'o' ) ( 'M' \| 'm' ) ( 'M' \| 'm' ) ( 'I' \| 'i' ) ( 'T' \| 't' ) ;

	UNION : ( 'U' \| 'u' ) ( 'N' \| 'n' ) ( 'I' \| 'i' ) ( 'O' \| 'o' ) ( 'N' \| 'n' ) ;

	ALL : ( 'A' \| 'a' ) ( 'L' \| 'l' ) ( 'L' \| 'l' ) ;

	CREATE : ( 'C' \| 'c' ) ( 'R' \| 'r' ) ( 'E' \| 'e' ) ( 'A' \| 'a' ) ( 'T' \| 't' ) ( 'E' \| 'e' ) ;

	INDEX : ( 'I' \| 'i' ) ( 'N' \| 'n' ) ( 'D' \| 'd' ) ( 'E' \| 'e' ) ( 'X' \| 'x' ) ;

	ON : ( 'O' \| 'o' ) ( 'N' \| 'n' ) ;

	DROP : ( 'D' \| 'd' ) ( 'R' \| 'r' ) ( 'O' \| 'o' ) ( 'P' \| 'p' ) ;

	CONSTRAINT : ( 'C' \| 'c' ) ( 'O' \| 'o' ) ( 'N' \| 'n' ) ( 'S' \| 's' ) ( 'T' \| 't' ) ( 'R' \| 'r' ) ( 'A' \| 'a' ) ( 'I' \| 'i' ) ( 'N' \| 'n' ) ( 'T' \| 't' ) ;

	ASSERT : ( 'A' \| 'a' ) ( 'S' \| 's' ) ( 'S' \| 's' ) ( 'E' \| 'e' ) ( 'R' \| 'r' ) ( 'T' \| 't' ) ;

	IS : ( 'I' \| 'i' ) ( 'S' \| 's' ) ;

	UNIQUE : ( 'U' \| 'u' ) ( 'N' \| 'n' ) ( 'I' \| 'i' ) ( 'Q' \| 'q' ) ( 'U' \| 'u' ) ( 'E' \| 'e' ) ;

	EXISTS : ( 'E' \| 'e' ) ( 'X' \| 'x' ) ( 'I' \| 'i' ) ( 'S' \| 's' ) ( 'T' \| 't' ) ( 'S' \| 's' ) ;

	LOAD : ( 'L' \| 'l' ) ( 'O' \| 'o' ) ( 'A' \| 'a' ) ( 'D' \| 'd' ) ;

	CSV : ( 'C' \| 'c' ) ( 'S' \| 's' ) ( 'V' \| 'v' ) ;

	WITH : ( 'W' \| 'w' ) ( 'I' \| 'i' ) ( 'T' \| 't' ) ( 'H' \| 'h' ) ;

	HEADERS : ( 'H' \| 'h' ) ( 'E' \| 'e' ) ( 'A' \| 'a' ) ( 'D' \| 'd' ) ( 'E' \| 'e' ) ( 'R' \| 'r' ) ( 'S' \| 's' ) ;

	FROM : ( 'F' \| 'f' ) ( 'R' \| 'r' ) ( 'O' \| 'o' ) ( 'M' \| 'm' ) ;

	AS : ( 'A' \| 'a' ) ( 'S' \| 's' ) ;

	FIELDTERMINATOR : ( 'F' \| 'f' ) ( 'I' \| 'i' ) ( 'E' \| 'e' ) ( 'L' \| 'l' ) ( 'D' \| 'd' ) ( 'T' \| 't' ) ( 'E' \| 'e' ) ( 'R' \| 'r' ) ( 'M' \| 'm' ) ( 'I' \| 'i' ) ( 'N' \| 'n' ) ( 'A' \| 'a' ) ( 'T' \| 't' ) ( 'O' \| 'o' ) ( 'R' \| 'r' ) ;

	OPTIONAL : ( 'O' \| 'o' ) ( 'P' \| 'p' ) ( 'T' \| 't' ) ( 'I' \| 'i' ) ( 'O' \| 'o' ) ( 'N' \| 'n' ) ( 'A' \| 'a' ) ( 'L' \| 'l' ) ;

	MATCH : ( 'M' \| 'm' ) ( 'A' \| 'a' ) ( 'T' \| 't' ) ( 'C' \| 'c' ) ( 'H' \| 'h' ) ;

	UNWIND : ( 'U' \| 'u' ) ( 'N' \| 'n' ) ( 'W' \| 'w' ) ( 'I' \| 'i' ) ( 'N' \| 'n' ) ( 'D' \| 'd' ) ;

	MERGE : ( 'M' \| 'm' ) ( 'E' \| 'e' ) ( 'R' \| 'r' ) ( 'G' \| 'g' ) ( 'E' \| 'e' ) ;

	SET : ( 'S' \| 's' ) ( 'E' \| 'e' ) ( 'T' \| 't' ) ;

	DELETE : ( 'D' \| 'd' ) ( 'E' \| 'e' ) ( 'L' \| 'l' ) ( 'E' \| 'e' ) ( 'T' \| 't' ) ( 'E' \| 'e' ) ;

	DETACH : ( 'D' \| 'd' ) ( 'E' \| 'e' ) ( 'T' \| 't' ) ( 'A' \| 'a' ) ( 'C' \| 'c' ) ( 'H' \| 'h' ) ;

	REMOVE : ( 'R' \| 'r' ) ( 'E' \| 'e' ) ( 'M' \| 'm' ) ( 'O' \| 'o' ) ( 'V' \| 'v' ) ( 'E' \| 'e' ) ;

	FOREACH : ( 'F' \| 'f' ) ( 'O' \| 'o' ) ( 'R' \| 'r' ) ( 'E' \| 'e' ) ( 'A' \| 'a' ) ( 'C' \| 'c' ) ( 'H' \| 'h' ) ;

	IN : ( 'I' \| 'i' ) ( 'N' \| 'n' ) ;

	DISTINCT : ( 'D' \| 'd' ) ( 'I' \| 'i' ) ( 'S' \| 's' ) ( 'T' \| 't' ) ( 'I' \| 'i' ) ( 'N' \| 'n' ) ( 'C' \| 'c' ) ( 'T' \| 't' ) ;

	RETURN : ( 'R' \| 'r' ) ( 'E' \| 'e' ) ( 'T' \| 't' ) ( 'U' \| 'u' ) ( 'R' \| 'r' ) ( 'N' \| 'n' ) ;

	ORDER : ( 'O' \| 'o' ) ( 'R' \| 'r' ) ( 'D' \| 'd' ) ( 'E' \| 'e' ) ( 'R' \| 'r' ) ;

	BY : ( 'B' \| 'b' ) ( 'Y' \| 'y' ) ;

	L_SKIP : ( 'S' \| 's' ) ( 'K' \| 'k' ) ( 'I' \| 'i' ) ( 'P' \| 'p' ) ;

	LIMIT : ( 'L' \| 'l' ) ( 'I' \| 'i' ) ( 'M' \| 'm' ) ( 'I' \| 'i' ) ( 'T' \| 't' ) ;

	DESCENDING : ( 'D' \| 'd' ) ( 'E' \| 'e' ) ( 'S' \| 's' ) ( 'C' \| 'c' ) ( 'E' \| 'e' ) ( 'N' \| 'n' ) ( 'D' \| 'd' ) ( 'I' \| 'i' ) ( 'N' \| 'n' ) ( 'G' \| 'g' ) ;

	DESC : ( 'D' \| 'd' ) ( 'E' \| 'e' ) ( 'S' \| 's' ) ( 'C' \| 'c' ) ;

	ASCENDING : ( 'A' \| 'a' ) ( 'S' \| 's' ) ( 'C' \| 'c' ) ( 'E' \| 'e' ) ( 'N' \| 'n' ) ( 'D' \| 'd' ) ( 'I' \| 'i' ) ( 'N' \| 'n' ) ( 'G' \| 'g' ) ;

	ASC : ( 'A' \| 'a' ) ( 'S' \| 's' ) ( 'C' \| 'c' ) ;

	JOIN : ( 'J' \| 'j' ) ( 'O' \| 'o' ) ( 'I' \| 'i' ) ( 'N' \| 'n' ) ;

	SCAN : ( 'S' \| 's' ) ( 'C' \| 'c' ) ( 'A' \| 'a' ) ( 'N' \| 'n' ) ;

	START : ( 'S' \| 's' ) ( 'T' \| 't' ) ( 'A' \| 'a' ) ( 'R' \| 'r' ) ( 'T' \| 't' ) ;

	NODE : ( 'N' \| 'n' ) ( 'O' \| 'o' ) ( 'D' \| 'd' ) ( 'E' \| 'e' ) ;

	RELATIONSHIP : ( 'R' \| 'r' ) ( 'E' \| 'e' ) ( 'L' \| 'l' ) ( 'A' \| 'a' ) ( 'T' \| 't' ) ( 'I' \| 'i' ) ( 'O' \| 'o' ) ( 'N' \| 'n' ) ( 'S' \| 's' ) ( 'H' \| 'h' ) ( 'I' \| 'i' ) ( 'P' \| 'p' ) ;

	REL : ( 'R' \| 'r' ) ( 'E' \| 'e' ) ( 'L' \| 'l' ) ;

	WHERE : ( 'W' \| 'w' ) ( 'H' \| 'h' ) ( 'E' \| 'e' ) ( 'R' \| 'r' ) ( 'E' \| 'e' ) ;

	SHORTESTPATH : ( 'S' \| 's' ) ( 'H' \| 'h' ) ( 'O' \| 'o' ) ( 'R' \| 'r' ) ( 'T' \| 't' ) ( 'E' \| 'e' ) ( 'S' \| 's' ) ( 'T' \| 't' ) ( 'P' \| 'p' ) ( 'A' \| 'a' ) ( 'T' \| 't' ) ( 'H' \| 'h' ) ;

	ALLSHORTESTPATHS : ( 'A' \| 'a' ) ( 'L' \| 'l' ) ( 'L' \| 'l' ) ( 'S' \| 's' ) ( 'H' \| 'h' ) ( 'O' \| 'o' ) ( 'R' \| 'r' ) ( 'T' \| 't' ) ( 'E' \| 'e' ) ( 'S' \| 's' ) ( 'T' \| 't' ) ( 'P' \| 'p' ) ( 'A' \| 'a' ) ( 'T' \| 't' ) ( 'H' \| 'h' ) ( 'S' \| 's' ) ;

	OR : ( 'O' \| 'o' ) ( 'R' \| 'r' ) ;

	XOR : ( 'X' \| 'x' ) ( 'O' \| 'o' ) ( 'R' \| 'r' ) ;

	AND : ( 'A' \| 'a' ) ( 'N' \| 'n' ) ( 'D' \| 'd' ) ;

	NOT : ( 'N' \| 'n' ) ( 'O' \| 'o' ) ( 'T' \| 't' ) ;

	STARTS : ( 'S' \| 's' ) ( 'T' \| 't' ) ( 'A' \| 'a' ) ( 'R' \| 'r' ) ( 'T' \| 't' ) ( 'S' \| 's' ) ;

	ENDS : ( 'E' \| 'e' ) ( 'N' \| 'n' ) ( 'D' \| 'd' ) ( 'S' \| 's' ) ;

	CONTAINS : ( 'C' \| 'c' ) ( 'O' \| 'o' ) ( 'N' \| 'n' ) ( 'T' \| 't' ) ( 'A' \| 'a' ) ( 'I' \| 'i' ) ( 'N' \| 'n' ) ( 'S' \| 's' ) ;

	NULL : ( 'N' \| 'n' ) ( 'U' \| 'u' ) ( 'L' \| 'l' ) ( 'L' \| 'l' ) ;

	TRUE : ( 'T' \| 't' ) ( 'R' \| 'r' ) ( 'U' \| 'u' ) ( 'E' \| 'e' ) ;

	FALSE : ( 'F' \| 'f' ) ( 'A' \| 'a' ) ( 'L' \| 'l' ) ( 'S' \| 's' ) ( 'E' \| 'e' ) ;

	COUNT : ( 'C' \| 'c' ) ( 'O' \| 'o' ) ( 'U' \| 'u' ) ( 'N' \| 'n' ) ( 'T' \| 't' ) ;

	FILTER : ( 'F' \| 'f' ) ( 'I' \| 'i' ) ( 'L' \| 'l' ) ( 'T' \| 't' ) ( 'E' \| 'e' ) ( 'R' \| 'r' ) ;

	EXTRACT : ( 'E' \| 'e' ) ( 'X' \| 'x' ) ( 'T' \| 't' ) ( 'R' \| 'r' ) ( 'A' \| 'a' ) ( 'C' \| 'c' ) ( 'T' \| 't' ) ;

	ANY : ( 'A' \| 'a' ) ( 'N' \| 'n' ) ( 'Y' \| 'y' ) ;

	NONE : ( 'N' \| 'n' ) ( 'O' \| 'o' ) ( 'N' \| 'n' ) ( 'E' \| 'e' ) ;

	SINGLE : ( 'S' \| 's' ) ( 'I' \| 'i' ) ( 'N' \| 'n' ) ( 'G' \| 'g' ) ( 'L' \| 'l' ) ( 'E' \| 'e' ) ;

	REDUCE : ( 'R' \| 'r' ) ( 'E' \| 'e' ) ( 'D' \| 'd' ) ( 'U' \| 'u' ) ( 'C' \| 'c' ) ( 'E' \| 'e' ) ;

	CASE : ( 'C' \| 'c' ) ( 'A' \| 'a' ) ( 'S' \| 's' ) ( 'E' \| 'e' ) ;

	ELSE : ( 'E' \| 'e' ) ( 'L' \| 'l' ) ( 'S' \| 's' ) ( 'E' \| 'e' ) ;

	END : ( 'E' \| 'e' ) ( 'N' \| 'n' ) ( 'D' \| 'd' ) ;

	WHEN : ( 'W' \| 'w' ) ( 'H' \| 'h' ) ( 'E' \| 'e' ) ( 'N' \| 'n' ) ;

	THEN : ( 'T' \| 't' ) ( 'H' \| 'h' ) ( 'E' \| 'e' ) ( 'N' \| 'n' ) ;

	L_0X : ( '0' \| '0' ) ( 'X' \| 'x' ) ;

	UnescapedSymbolicNameString : IdentifierStart ( IdentifierPart )* ;

	/**
	* Based on the unicode identifier and pattern syntax
	* (http://www.unicode.org/reports/tr31/)
	* And extended with a few characters.
	*/

	IdentifierStart : ID_Start
	\| Sc
	\| '_'
	\| '‿'
	\| '⁀'
	\| '⁔'
	\| '︳'
	\| '︴'
	\| '﹍'
	\| '﹎'
	\| '﹏'
	\| '＿'
	;

	/**
	* Based on the unicode identifier and pattern syntax
	* (http://www.unicode.org/reports/tr31/)
	* And extended with a few characters.
	*/
	IdentifierPart : ID_Continue
	\| Sc
	;

	/**
	* Any character except "`", enclosed within `backticks`. Backticks are escaped with double backticks. */
	EscapedSymbolicNameString : ( '`' ( EscapedSymbolicNameString_0 )* '`' )+ ;

	WS : WHITESPACE+ -> channel(HIDDEN);

	WHITESPACE : SPACE
	\| TAB
	\| LF
	\| VT
	\| FF
	\| CR
	\| FS
	\| GS
	\| RS
	\| US
	\| ' '
	\| '᠎'
	\| ' '
	\| ' '
	\| ' '
	\| ' '
	\| ' '
	\| ' '
	\| ' '
	\| ' '
	\| ' '
	\| ' '
	\| ' '
	\| ' '
	\| ' '
	\| '　'
	\| ' '
	\| ' '
	\| ' '
	\| Comment
	;

	Comment : ( '/' ( Comment_0 \| ( '' Comment_1 ) )* '*/' )
	\| ( '//' Comment_2 CR? ( LF \| EOF ) )
	;

	leftArrowHead : '<'
	\| '⟨'
	\| '〈'
	\| '﹤'
	\| '＜'
	;

	rightArrowHead : '>'
	\| '⟩'
	\| '〉'
	\| '﹥'
	\| '＞'
	;

	dash : '-'
	\| ''
	\| '‐'
	\| '‑'
	\| '‒'
	\| '–'
	\| '—'
	\| '―'
	\| '−'
	\| '﹘'
	\| '﹣'
	\| '－'
	;