public List<Expression> getScopeStraddlingEqualities() {
      return scopeStraddlingEqualities;
    }
Returns a canonical expression that is fully contained by the symbolScope and that is
equivalent to the specified expression. Returns null if unable to find a canonical.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/relational/planner/EqualityInference.java