code: boolean isSameSchemaAndTable(TableSpec tableSpec) {
          return StringUtil.equals(tableSpec.getSchema(), getSchema())
                  && StringUtil.equals(tableSpec.getTable(), getTable());
      }
docs: Returns whether the given column specification has the same schema and
  table as this one.
  
  @param tableSpec
  a {@link TableSpec}.
  @return <code>true</code> if the given table specification has the same
  schema and table as this one, <code>false</code> if not.