@Override
  public long getMinTime() {
    long minTime = list.getMinTime();
    for (AlignedTVList alignedTvList : sortedList) {
      minTime = Math.min(minTime, alignedTvList.getMinTime());
    }
    return minTime;
  }
Check metadata of columns and return array that mapping existed metadata to index of data
column.

@param schemaListInInsertPlan Contains all existed schema in InsertPlan. If some timeseries
    have been deleted, there will be null in its slot.
@return columnIndexArray: schemaList[i] is schema of columns[columnIndexArray[i]]
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/storageengine/dataregion/memtable/AlignedWritableMemChunk.java