HQL 写法

HQL BNF 
query: 
    [selectClause] fromClause [whereClause] [groupByClause] [havingClause] [orderByClause]; 

selectClause: 
    SELECT DISTINCT? selectedPropertiesList | ( NEW className OPEN selectedPropertiesList CLOSE );; 

fromClause: 
    FROM className AS? identifier (  ( COMMA className AS? identifier ); | ( joinType path AS? identifier ); );*; 

joinType: 
    ( ( 'left'|'right' 'outer'? ); | 'full' | 'inner' );? JOIN FETCH?; 

groupByClause: 
    GROUP_BY path ( COMMA path );*; 

orderByClause: 
    ORDER_BY selectedPropertiesList; 

havingClause: 
    HAVING logicalExpression; 

whereClause: 
    WHERE logicalExpression; 

selectedPropertiesList: 
    ( path | aggregate ); ( COMMA path | aggregate );*; 

aggregate: 
    ( aggregateFunction OPEN path CLOSE ); |  ( COUNT OPEN STAR CLOSE ); |  ( COUNT OPEN DISTINCT | ALL path CLOSE );; 

aggregateFunction: 
    COUNT | 'sum' | 'avg' | 'max' | 'min'; 

logicalExpression: TODO! 

expression: TODO! 

collection: ( OPEN query CLOSE ); | ( 'elements'|'indices' OPEN path CLOSE );; 

quantifiedExpression: 'exists' | ( expression 'in' ); | ( expression OP 'any' | 'some' ); collection; 

compoundPath: path ( OPEN_BRACKET expression CLOSE_BRACKET ( '.' path );? );*; 

path: identifier ( '.' identifier );*; 

className: path; 

OP: EQ | LT | GT | LE | GE | NE | SQL_NE | LIKE; 

AS: 'as'; 
DISTINCT: 'distinct'; 
ALL: 'all'; 
COUNT: 'count'; 
SELECT: 'select'; 
FROM: 'from'; 
JOIN: 'join'; 
FETCH: 'fetch' 
BY: 'by'; 
GROUP_BY: 'group' BY; 
ORDER_BY: 'order' BY; 
HAVING: 'having'; 
WHERE: 'where'; 
NEW: 'new'; 

LIKE: 'like'; 
EQ: '='; 
LT: '<'; 
GT: '>'; 
SQL_NE: "<>"; 
NE: "!=" | "^="; 
LE: "<="; 
GE: ">="; 

COMMA: ','; 

OPEN: '('; 
CLOSE: ');'; 
OPEN_BRACKET: '['; 
CLOSE_BRACKET: ']'; 

CONCAT: "||"; 
PLUS: '+'; 
MINUS: '-'; 
STAR: '*'; 
DIV: '/';