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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.
This is an asynchronous operation using the standard naming convention for .NET 4.5 or higher. For .NET 3.5 the operation is implemented as a pair of methods using the standard naming convention of BeginSelect and EndSelect.
Namespace: Amazon.SimpleDB
Assembly: AWSSDK.SimpleDB.dll
Version: 3.x.y.z
public abstract Task<SelectResponse> SelectAsync( SelectRequest request, CancellationToken cancellationToken )
Container for the necessary parameters to execute the Select service method.
A cancellation token that can be used by other objects or threads to receive notice of cancellation.
Exception | Condition |
---|---|
InvalidNextTokenException | The specified NextToken is not valid. |
InvalidNumberPredicatesException | Too many predicates exist in the query expression. |
InvalidNumberValueTestsException | Too many predicates exist in the query expression. |
InvalidParameterValueException | The value for a parameter is invalid. |
InvalidQueryExpressionException | The specified query expression syntax is not valid. |
MissingParameterException | The request must contain the specified missing parameter. |
NoSuchDomainException | The specified domain does not exist. |
RequestTimeoutException | A timeout occurred when attempting to query the specified domain with specified query expression. |
TooManyRequestedAttributesException | Too many attributes requested. |
.NET Core App:
Supported in: 3.1
.NET Standard:
Supported in: 2.0
.NET Framework:
Supported in: 4.5