private Schema getSchema() {
    Schema sch = new Schema();
    FieldSchema tmpFieldSchema = new FieldSchema();

    tmpFieldSchema.setName(SET_COLUMN_NAME);

    tmpFieldSchema.setType(STRING_TYPE_NAME);
    sch.putToProperties(SERIALIZATION_NULL_FORMAT, defaultNullString);
    sch.addToFieldSchemas(tmpFieldSchema);

    return sch;
  }
@return A console message that is not strong enough to fail the command (e.g. deprecation).
ql/src/java/org/apache/hadoop/hive/ql/processors/SetProcessor.java