@Override
  public ReadOnlyMemChunk query(
      QueryContext context,
      IFullPath fullPath,
      long ttlLowerBound,
      List<Pair<ModEntry, IMemTable>> modsToMemtable,
      Filter globalTimeFilter)
      throws IOException, QueryProcessException {
    return ResourceByPathUtils.getResourceInstance(fullPath)
        .getReadOnlyMemChunkFromMemTable(
            context, this, modsToMemtable, ttlLowerBound, globalTimeFilter);
  }
Create this MemChunk if it's not exist.

@param deviceId device id
@param schemaList measurement schemaList
@return this MemChunkGroup
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/memtable/AbstractMemTable.java