public static List<Expression> extractConjuncts(Expression predicate) {
    Set<Expression> conjuncts = new HashSet<>();
    extractConjuncts(predicate, conjuncts);
    return new ArrayList<>(conjuncts);
  }
Combine the given conjuncts into a single expression using "and".

@param conjuncts given conjuncts
@return the expression combined by the given conjuncts
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/analyze/PredicateUtils.java