@Override
      public List<Function> run(List<Long> input) throws MetaException {
        return getFunctionsFromFunctionIds(input, catName);
      }
Checks if the column descriptors still has references for other SD-s. If not, then removes
them. Should be called with the list short enough to not trip up Oracle/etc.
@param columnDescriptorIdList The column identifiers
@throws MetaException If there is an SQL exception during the execution it converted to
MetaException
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/MetaStoreDirectSql.java