@org.apache.thrift.annotation.Nullable
  public java.lang.Object getFieldValue(_Fields field) {
    switch (field) {
    case CAT_NAME:
      return getCatName();

    case DB_NAME:
      return getDbName();

    case TBL_NAME:
      return getTblName();

    case TABLES_USED:
      return getTablesUsed();

    case VALID_TXN_LIST:
      return getValidTxnList();

    case MATERIALIZATION_TIME:
      return getMaterializationTime();

    case SOURCE_TABLES:
      return getSourceTables();

    }
    throw new java.lang.IllegalStateException();
  }
Returns true if field sourceTables is set (has been assigned a value) and false otherwise
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/CreationMetadata.java