public C ignoreIndex(String... indexes) {
        return addJoinFlag(" ignore index (" + String.join(", ", indexes) + ")", JoinFlag.Position.END);
    }
The alternative syntax IGNORE INDEX (index_list) can be used to tell MySQL to not use some
particular index or indexes.

@param indexes index names
@return the current object
querydsl-sql/src/main/java/com/querydsl/sql/mysql/AbstractMySQLQuery.java