import org.apache.hcatalog.common.HCatException; //导入依赖的package包/类
private static void validateHCatFieldAndTajoSchema(HCatFieldSchema fieldSchema) throws CatalogException {
  try {
    HCatFieldSchema.Type fieldType = fieldSchema.getType();
    switch (fieldType) {
      case ARRAY:
        throw new HCatException("Tajo cannot support array field type.");
      case STRUCT:
        throw new HCatException("Tajo cannot support struct field type.");
      case MAP:
        throw new HCatException("Tajo cannot support map field type.");
    }
  } catch (HCatException e) {
    throw new CatalogException("incompatible hcatalog types when assigning to tajo type. - " +
        "HCatFieldSchema:" + fieldSchema);
  }
}
 

import org.apache.hcatalog.common.HCatException; //导入依赖的package包/类
protected HCatFieldSchema getSubFieldSchema(String fieldName, HCatFieldSchema.Type type) throws HCatException {
    HCatFieldSchema result = new HCatFieldSchema(fieldName, type, "");

    return result;
}