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AqlLexer.g4
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AqlLexer.g4
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lexer grammar AqlLexer;
channels {
COMMENT_CHANNEL
}
// SKIP
WS: [ \t\r\n]+ -> skip;
UNICODE_BOM: (
'\uEFBBBF' // UTF-8 BOM
| '\uFEFF' // UTF16_BOM
| '\u0000FEFF' // UTF32_BOM
) -> skip;
COMMENT: (
SYM_DOUBLE_DASH ' ' ~[\r\n]* ('\r'? '\n' | EOF)
| SYM_DOUBLE_DASH ('\r'? '\n' | EOF)
) -> channel(COMMENT_CHANNEL);
// Keywords
// Common Keywords
SELECT: S E L E C T ;
AS: A S ;
FROM: F R O M ;
WHERE: W H E R E ;
ORDER: O R D E R ;
DESC: D E S C ;
DESCENDING: D E S C E N D I N G ;
ASC: A S C ;
ASCENDING: A S C E N D I N G ;
LIMIT: L I M I T ;
OFFSET: O F F S E T ;
// other keywords
DISTINCT: D I S T I N C T ;
VERSION : V E R S I O N ;
LATEST_VERSION : L A T E S T '_' V E R S I O N ;
ALL_VERSIONS : A L L '_' V E R S I O N S ;
NULL: N U L L ;
DEMOGRAPHIC: 'DEMOGRAPHIC';
JOIN: J O I N ;
// deprecated
TOP: T O P ;
FORWARD: F O R W A R D ;
BACKWARD: B A C K W A R D ;
// Additions for GROUP BY, UNION, and UPDATE
GROUP: G R O U P ;
BY: B Y ;
UNION: U N I O N ;
UPDATE: U P D A T E ;
// Operators
// Containment operator
CONTAINS : C O N T A I N S ;
// Logical operators
AND : A N D ;
OR : O R ;
NOT : N O T ;
EXISTS: E X I S T S ;
// Comparison operators
COMPARISON_OPERATOR: SYM_EQ | SYM_NE | SYM_GT | SYM_GE | SYM_LT | SYM_LE ;
LIKE: L I K E ;
MATCHES: M A T C H E S ;
// functions
STRING_FUNCTION_ID: LENGTH | CONTAINS | POSITION | SUBSTRING | CONCAT_WS | CONCAT ;
NUMERIC_FUNCTION_ID: ABS | MOD | CEIL | FLOOR | ROUND ;
DATE_TIME_FUNCTION_ID: NOW | CURRENT_DATE_TIME | CURRENT_DATE | CURRENT_TIMEZONE | CURRENT_TIME ;
// string functions
LENGTH: L E N G T H ;
POSITION: P O S I T I O N ;
SUBSTRING: S U B S T R I N G ;
CONCAT: C O N C A T ;
CONCAT_WS: C O N C A T '_' W S ;
// numeric functions
ABS: A B S ;
MOD: M O D ;
CEIL: C E I L ;
FLOOR: F L O O R ;
ROUND: R O U N D ;
// date and time functions
CURRENT_DATE: C U R R E N T '_' D A T E ;
CURRENT_TIME: C U R R E N T '_' T I M E ;
CURRENT_DATE_TIME: C U R R E N T '_' D A T E '_' T I M E ;
NOW: N O W ;
CURRENT_TIMEZONE: C U R R E N T '_' T I M E Z O N E ;
// aggregate function
COUNT: C O U N T ;
MIN: M I N ;
MAX: M A X ;
SUM: S U M ;
AVG: A V G ;
// other functions
TERMINOLOGY: T E R M I N O L O G Y ;
// other, identifiers
PARAMETER: '$' IDENTIFIER_CHAR;
//
// ======================= Lexical rules ========================
// The followings are copies of https://github.com/openEHR/adl-antlr/blob/master/src/main/antlr/adl2/base_lexer.g4 rules, with some modifications required by AQL
//
// ---------- various ADL2 codes -------
ID_CODE : 'id' CODE_STR ;
AT_CODE : 'at' CODE_STR ;
fragment CODE_STR : ('0' | [1-9][0-9]*)+ ( '.' ('0' | [1-9][0-9]* ))* ;
// ---------- Delimited Regex matcher ------------
CONTAINED_REGEX: '{'WS* SLASH_REGEX WS* (';' WS* STRING)? WS* '}';
fragment SLASH_REGEX: '/' SLASH_REGEX_CHAR+ '/';
fragment SLASH_REGEX_CHAR: ~[/\n\r] | ESCAPE_SEQ | '\\/';
// ---------- ISO8601 Date/Time values ----------
fragment ISO8601_DATE
: YEAR MONTH DAY
| YEAR '-' MONTH '-' DAY
;
fragment ISO8601_TIME
: HOUR MINUTE SECOND ('.' MICROSECOND)? TIMEZONE?
| HOUR ':' MINUTE ':' SECOND ('.' MICROSECOND)? TIMEZONE?
;
fragment ISO8601_DATE_TIME
: YEAR MONTH DAY ('T' HOUR MINUTE SECOND ('.' MICROSECOND)? TIMEZONE?)?
| YEAR '-' MONTH '-' DAY ('T' HOUR ':' MINUTE ':' SECOND ('.' MICROSECOND)? TIMEZONE?)?
;
fragment MICROSECOND: [0-9][0-9][0-9] ;
fragment TIMEZONE: 'Z' | [+-] HOUR ( ':'? MINUTE )? ; // hour offset, e.g. `+09:30`, or else literal `Z` indicating +0000.
fragment YEAR: [0-9][0-9][0-9][0-9] ; // Year in ISO8601:2004 is 4 digits with 0-filling as needed
fragment MONTH: ( [0][1-9] | [1][0-2] ) ; // month in year
fragment DAY: ( [0][1-9] | [12][0-9] | [3][0-1] ) ; // day in month
fragment HOUR: ( [01][0-9] | [2][0-3] ) ; // hour in 24 hour clock
fragment MINUTE: [0-5][0-9] ; // minutes
fragment SECOND: [0-5][0-9] ; // seconds
// ------------------- special word symbols --------------
fragment SYM_TRUE: T R U E ;
fragment SYM_FALSE: F A L S E ;
// ---------------------- Identifiers ---------------------
ARCHETYPE_HRID : ARCHETYPE_HRID_ROOT '.v' VERSION_ID ;
fragment ARCHETYPE_HRID_ROOT : (NAMESPACE '::')? IDENTIFIER_CHAR '-' IDENTIFIER_CHAR '-' IDENTIFIER_CHAR '.' ARCHETYPE_CONCEPT_ID ;
fragment VERSION_ID : DIGIT+ ('.' DIGIT+)* ( ( '-rc' | '-alpha' ) ( '.' DIGIT+ )? )? ;
IDENTIFIER: IDENTIFIER_CHAR;
fragment IDENTIFIER_CHAR : ALPHA_CHAR WORD_CHAR* ;
fragment ARCHETYPE_CONCEPT_ID : ALPHA_CHAR NAME_CHAR* ;
// --------------------- composed primitive types -------------------
// coded term shortcut e.g. 'ICD10AM(1998)::F23', 'ISO_639-1::en' or 'snomed_ct(3.1)::3415004|cyanosis|'
TERM_CODE : TERM_CODE_CHAR+ ( '(' TERM_CODE_CHAR+ ')' )? '::' TERM_CODE_CHAR+ ('|' ~[|[\]]+ '|')?;
fragment TERM_CODE_CHAR: NAME_CHAR | '.';
// URIs - simple recogniser based on https://tools.ietf.org/html/rfc3986 and
// http://www.w3.org/Addressing/URL/5_URI_BNF.html
URI : URI_SCHEME ':' URI_HIER_PART ( '?' URI_QUERY )? ('#' URI_FRAGMENT)? ;
fragment URI_HIER_PART : ( '//' URI_AUTHORITY ) URI_PATH_ABEMPTY
| URI_PATH_ABSOLUTE
| URI_PATH_ROOTLESS
| URI_PATH_EMPTY;
fragment URI_SCHEME : ALPHA_CHAR ( ALPHA_CHAR | DIGIT | '+' | '-' | '.')* ;
fragment URI_AUTHORITY : ( URI_USERINFO '@' )? URI_HOST ( ':' URI_PORT )? ;
fragment URI_USERINFO: (URI_UNRESERVED | URI_PCT_ENCODED | URI_SUB_DELIMS | ':' )* ;
fragment URI_HOST : URI_IP_LITERAL | URI_IPV4_ADDRESS | URI_REG_NAME ; //TODO: ipv6
fragment URI_PORT: DIGIT*;
fragment URI_IP_LITERAL : '[' URI_IPV6_LITERAL ']'; //TODO, if needed: IPvFuture
fragment URI_IPV4_ADDRESS : URI_DEC_OCTET '.' URI_DEC_OCTET '.' URI_DEC_OCTET '.' URI_DEC_OCTET ;
fragment URI_IPV6_LITERAL : HEX_QUAD (':' HEX_QUAD )* '::' HEX_QUAD (':' HEX_QUAD )* ;
fragment URI_DEC_OCTET : DIGIT | [1-9] DIGIT | '1' DIGIT DIGIT | '2' [0-4] DIGIT | '25' [0-5];
fragment URI_REG_NAME: (URI_UNRESERVED | URI_PCT_ENCODED | URI_SUB_DELIMS)*;
fragment HEX_QUAD : HEX_DIGIT HEX_DIGIT HEX_DIGIT HEX_DIGIT ;
fragment URI_PATH_ABEMPTY: ('/' URI_SEGMENT ) *;
fragment URI_PATH_ABSOLUTE: '/' ( URI_SEGMENT_NZ ( '/' URI_SEGMENT )* )?;
fragment URI_PATH_NOSCHEME: URI_SEGMENT_NZ_NC ( '/' URI_SEGMENT )*;
fragment URI_PATH_ROOTLESS: URI_SEGMENT_NZ ( '/' URI_SEGMENT )*;
fragment URI_PATH_EMPTY: ;
fragment URI_SEGMENT: URI_PCHAR*;
fragment URI_SEGMENT_NZ: URI_PCHAR+;
fragment URI_SEGMENT_NZ_NC: ( URI_UNRESERVED | URI_PCT_ENCODED | URI_SUB_DELIMS | '@' )+; //non-zero-length segment without any colon ":"
fragment URI_PCHAR: URI_UNRESERVED | URI_PCT_ENCODED | URI_SUB_DELIMS | ':' | '@';
//fragment URI_PATH : '/' | ( '/' URI_XPALPHA+ )+ ('/')?;
fragment URI_QUERY : (URI_PCHAR | '/' | '?')*;
fragment URI_FRAGMENT : (URI_PCHAR | '/' | '?')*;
fragment URI_PCT_ENCODED : '%' HEX_DIGIT HEX_DIGIT ;
fragment URI_UNRESERVED: ALPHA_CHAR | DIGIT | '-' | '.' | '_' | '~';
fragment URI_RESERVED: URI_GEN_DELIMS | URI_SUB_DELIMS;
fragment URI_GEN_DELIMS: ':' | '/' | '?' | '#' | '[' | ']' | '@'; //TODO: migrate to [/?#...] notation
fragment URI_SUB_DELIMS: '!' | '$' | '&' | '\'' | '(' | ')'
| '*' | '+' | ',' | ';' | '=';
// According to IETF http://tools.ietf.org/html/rfc1034[RFC 1034] and http://tools.ietf.org/html/rfc1035[RFC 1035],
// as clarified by http://tools.ietf.org/html/rfc2181[RFC 2181] (section 11)
fragment NAMESPACE: LABEL ('.' LABEL)* ;
fragment LABEL: ALPHA_CHAR (NAME_CHAR|URI_PCT_ENCODED)* ;
// --------------------- atomic primitive types -------------------
BOOLEAN: SYM_TRUE | SYM_FALSE ;
INTEGER: DIGIT+;
REAL: DIGIT* '.' DIGIT+;
SCI_INTEGER: INTEGER E_SUFFIX;
SCI_REAL: REAL E_SUFFIX;
fragment E_SUFFIX: E [-+]? DIGIT+ ;
DATE
: SYM_SINGLE_QUOTE ISO8601_DATE SYM_SINGLE_QUOTE
| SYM_DOUBLE_QUOTE ISO8601_DATE SYM_DOUBLE_QUOTE
;
TIME
: SYM_SINGLE_QUOTE ISO8601_TIME SYM_SINGLE_QUOTE
| SYM_DOUBLE_QUOTE ISO8601_TIME SYM_DOUBLE_QUOTE
;
DATETIME
: SYM_SINGLE_QUOTE ISO8601_DATE_TIME SYM_SINGLE_QUOTE
| SYM_DOUBLE_QUOTE ISO8601_DATE_TIME SYM_DOUBLE_QUOTE
;
STRING
: SYM_SINGLE_QUOTE ( ESCAPE_SEQ | UTF8CHAR | OCTAL_ESC | ~('\\'|'\'') )* SYM_SINGLE_QUOTE
| SYM_DOUBLE_QUOTE ( ESCAPE_SEQ | UTF8CHAR | OCTAL_ESC | ~('\\'|'"') )* SYM_DOUBLE_QUOTE
;
fragment ESCAPE_SEQ: '\\' ['"?abfnrtv\\] ;
// ------------------- character fragments ------------------
fragment NAME_CHAR: WORD_CHAR | '-' ;
fragment WORD_CHAR: ALPHANUM_CHAR | '_' ;
fragment ALPHANUM_CHAR: ALPHA_CHAR | DIGIT ;
fragment ALPHA_CHAR: [a-zA-Z];
fragment UTF8CHAR: '\\u' HEX_DIGIT HEX_DIGIT HEX_DIGIT HEX_DIGIT ;
fragment DIGIT: [0-9];
fragment HEX_DIGIT: [0-9a-fA-F];
fragment OCTAL_ESC: '\\' [0-3] OCTAL_DIGIT OCTAL_DIGIT | '\\' OCTAL_DIGIT OCTAL_DIGIT | '\\' OCTAL_DIGIT;
fragment OCTAL_DIGIT: [0-7];
// ---------- symbols ----------
SYM_SEMICOLON: ';' ;
SYM_LT: '<' ;
SYM_GT: '>' ;
SYM_LE: '<=' ;
SYM_GE: '>=' ;
SYM_NE: '!=' ;
SYM_EQ: '=' ;
SYM_LEFT_PAREN: '(' ;
SYM_RIGHT_PAREN: ')' ;
SYM_COMMA: ',';
SYM_SLASH: '/';
SYM_ASTERISK: '*';
SYM_PLUS: '+';
SYM_MINUS: '-';
SYM_LEFT_BRACKET: '[';
SYM_RIGHT_BRACKET: ']';
SYM_LEFT_CURLY: '{';
SYM_RIGHT_CURLY: '}';
SYM_DOUBLE_DASH: '--';
fragment SYM_SINGLE_QUOTE: '\'';
fragment SYM_DOUBLE_QUOTE: '"';
// ------------------- Fragment letters ---------------------
fragment A: [aA];
fragment B: [bB];
fragment C: [cC];
fragment D: [dD];
fragment E: [eE];
fragment F: [fF];
fragment G: [gG];
fragment H: [hH];
fragment I: [iI];
fragment J: [jJ];
fragment K: [kK];
fragment L: [lL];
fragment M: [mM];
fragment N: [nN];
fragment O: [oO];
fragment P: [pP];
fragment Q: [qQ];
fragment R: [rR];
fragment S: [sS];
fragment T: [tT];
fragment U: [uU];
fragment V: [vV];
fragment W: [wW];
fragment X: [xX];
fragment Y: [yY];
fragment Z: [zZ];