code: @Override
      public SelectResult select(SelectRequest request) {
          request = beforeClientExecution(request);
          return executeSelect(request);
      }
docs: <p>
  The <code>Select</code> operation returns a set of attributes for <code>ItemNames</code> that match the select
  expression. <code>Select</code> is similar to the standard SQL SELECT statement.
  </p>
  <p>
  The total size of the response cannot exceed 1 MB in total size. Amazon SimpleDB automatically adjusts the number
  of items returned per page to enforce this limit. For example, if the client asks to retrieve 2500 items, but
  each individual item is 10 kB in size, the system returns 100 items and an appropriate <code>NextToken</code> so
  the client can access the next page of results.
  </p>
  <p>
  For information on how to construct select expressions, see Using Select to Create Amazon SimpleDB Queries in the
  Developer Guide.
  </p>
  
  @param selectRequest
  @return Result of the Select operation returned by the service.
  @throws InvalidParameterValueException
  The value for a parameter is invalid.
  @throws InvalidNextTokenException
  The specified NextToken is not valid.
  @throws InvalidNumberPredicatesException
  Too many predicates exist in the query expression.
  @throws InvalidNumberValueTestsException
  Too many predicates exist in the query expression.
  @throws InvalidQueryExpressionException
  The specified query expression syntax is not valid.
  @throws MissingParameterException
  The request must contain the specified missing parameter.
  @throws NoSuchDomainException
  The specified domain does not exist.
  @throws RequestTimeoutException
  A timeout occurred when attempting to query the specified domain with specified query expression.
  @throws TooManyRequestedAttributesException
  Too many attributes requested.
  @sample AmazonSimpleDB.Select