HQL does not support the modulo operator (%)

The HQL parser rejects the % (modulo) operator, although Hibernate accepts it.

@Query("select c from Call c where c.duration % 2 = 0")
List<Call> findEvenDurations();

fails with:

org.springframework.data.jpa.repository.query.BadJpqlGrammarException:
At 1:38, token recognition error at: '%';
Bad HQL grammar [select c from Call c where c.duration % 2 = 0]

Hql.g4 only allows * and / as multiplicative operators, while Hibernate's grammar also includes %:

// Hql.g4
expression
    | expression op=('*' | '/') expression    # MultiplicationExpression

// Hibernate HqlParser.g4
multiplicativeOperator
	: SLASH
	| PERCENT_OP
	| ASTERISK
	;

Running the same queries through Hibernate's own HqlParser and through JpaQueryEnhancer.HqlQueryParser:

The same applies to JpaSort.unsafe("age % 2"), which is parsed with the HQL grammar as well. Note that HqlOrderExpressionVisitor.visitMultiplicationExpression currently maps every operator other than * to CriteriaBuilder.quot(…),
so it needs to map % to CriteriaBuilder.mod(…) once the grammar accepts it.

Start with Hql.g4 and JpaQueryEnhancer.HqlQueryParser to trace how multiplicative operators are parsed, then inspect HqlOrderExpressionVisitor.visitMultiplicationExpression for unsafe sort handling. Compare behavior with Hibernate's HqlParser and run the existing parser and sorting tests. Done means % works in HQL expressions and JpaSort.unsafe expressions, with modulo mapped to CriteriaBuilder.mod rather than division.