select method

Future<SelectResult> select({ required String selectExpression, bool? consistentRead, String? nextToken, })

The Select operation returns a set of attributes for ItemNames that match the select expression. Select is similar to the standard SQL SELECT statement.

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 NextToken so the client can access the next page of results.

For information on how to construct select expressions, see Using Select to Create Amazon SimpleDB Queries in the Developer Guide.

May throw InvalidParameterValue. May throw InvalidNextToken. May throw InvalidNumberPredicates. May throw InvalidNumberValueTests. May throw InvalidQueryExpression. May throw MissingParameter. May throw NoSuchDomain. May throw RequestTimeout. May throw TooManyRequestedAttributes.

Parameter selectExpression : The expression used to query the domain.

Parameter consistentRead : Determines whether or not strong consistency should be enforced when data is read from SimpleDB. If true, any data previously written to SimpleDB will be returned. Otherwise, results will be consistent eventually, and the client may not see data that was written immediately before your read.

Parameter nextToken : A string informing Amazon SimpleDB where to start the next list of ItemNames.

Implementation

Future<SelectResult> select({
  required String selectExpression,
  bool? consistentRead,
  String? nextToken,
}) async {
  ArgumentError.checkNotNull(selectExpression, 'selectExpression');
  final $request = <String, dynamic>{};
  $request['SelectExpression'] = selectExpression;
  consistentRead?.also((arg) => $request['ConsistentRead'] = arg);
  nextToken?.also((arg) => $request['NextToken'] = arg);
  final $result = await _protocol.send(
    $request,
    action: 'Select',
    version: '2009-04-15',
    method: 'POST',
    requestUri: '/',
    exceptionFnMap: _exceptionFns,
    shape: shapes['SelectRequest'],
    shapes: shapes,
    resultWrapper: 'SelectResult',
  );
  return SelectResult.fromXml($result);
}