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- AntlrGrammar.g4::: The following sets of rules are mutually left-recursive [subquery]
- grammar GrammarSubspace;
- DIGIT: [0-9];
- INT: DIGIT ( DIGIT )*;
- LETTER : [a-zA-Z_] ;
- ID : LETTER (LETTER|[0-9]|'_');
- expr: expr '*' expr // precedence 4
- | expr '+' expr // precedence 3
- | INT // primary (precedence 2)
- | ID // primary (precedence 1)
- ;
- rowsetoperator: ( UNION (ALL)? | INTERSECT | MINUS );
- subquery:
- (
- TERMINALVARIANT
- | (subquery rowsetoperator subquery)+
- | '(' subquery ')'
- )
- ;
- TERMINALVARIANT: T E R M I N A L V A R I A N T; // Placeholder for another UNTERMINAL that resolves into all terminals without indirect recurrence to subquery
- 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];
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