@Explain(vectorization = Vectorization.OPERATOR, displayName = "File Sink Vectorization", explainLevels = { Level.DEFAULT, Level.EXTENDED })
  public FileSinkOperatorExplainVectorization getFileSinkVectorization() {
    VectorFileSinkDesc vectorFileSinkDesc = (VectorFileSinkDesc) getVectorDesc();
    if (vectorFileSinkDesc == null) {
      return null;
    }
    return new FileSinkOperatorExplainVectorization(vectorFileSinkDesc);
  }
Whether this is CREATE TABLE SELECT or CREATE MATERIALIZED VIEW statement
Set by semantic analyzer this is required because CTAS/CM requires some special logic
in mvFileToFinalPath
ql/src/java/org/apache/hadoop/hive/ql/plan/FileSinkDesc.java