Class: AWS.SimpleDB

Inherits:
AWS.Service show all
Identifier:
simpledb
API Version:
2009-04-15
Defined in:
(unknown)

Overview

Constructs a service interface object. Each API operation is exposed as a function on service.

Sending a Request Using SimpleDB

var simpledb = new AWS.SimpleDB();
simpledb.batchDeleteAttributes(params, function (err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Locking the API Version

In order to ensure that the SimpleDB object uses this specific API, you can construct the object by passing the apiVersion option to the constructor:

var simpledb = new AWS.SimpleDB({apiVersion: '2009-04-15'});

You can also set the API version globally in AWS.config.apiVersions using the simpledb service identifier:

AWS.config.apiVersions = {
  simpledb: '2009-04-15',
  // other service API versions
};

var simpledb = new AWS.SimpleDB();

Version:

  • 2009-04-15

Constructor Summary collapse

Property Summary collapse

Properties inherited from AWS.Service

apiVersions

Method Summary collapse

Methods inherited from AWS.Service

makeRequest, makeUnauthenticatedRequest, waitFor, setupRequestListeners, defineService

Constructor Details

new AWS.SimpleDB(options = {}) ⇒ Object

Constructs a service object. This object has one method for each API operation.

Examples:

Constructing a SimpleDB object

var simpledb = new AWS.SimpleDB({apiVersion: '2009-04-15'});

Options Hash (options):

  • params (map)

    An optional map of parameters to bind to every request sent by this service object. For more information on bound parameters, see "Working with Services" in the Getting Started Guide.

  • endpoint (String)

    The endpoint URI to send requests to. The default endpoint is built from the configured region. The endpoint should be a string like 'https://{service}.{region}.amazonaws.com'.

  • accessKeyId (String)

    your AWS access key ID.

  • secretAccessKey (String)

    your AWS secret access key.

  • sessionToken (AWS.Credentials)

    the optional AWS session token to sign requests with.

  • credentials (AWS.Credentials)

    the AWS credentials to sign requests with. You can either specify this object, or specify the accessKeyId and secretAccessKey options directly.

  • credentialProvider (AWS.CredentialProviderChain)

    the provider chain used to resolve credentials if no static credentials property is set.

  • region (String)

    the region to send service requests to. See AWS.SimpleDB.region for more information.

  • maxRetries (Integer)

    the maximum amount of retries to attempt with a request. See AWS.SimpleDB.maxRetries for more information.

  • maxRedirects (Integer)

    the maximum amount of redirects to follow with a request. See AWS.SimpleDB.maxRedirects for more information.

  • sslEnabled (Boolean)

    whether to enable SSL for requests.

  • paramValidation (Boolean|map)

    whether input parameters should be validated against the operation description before sending the request. Defaults to true. Pass a map to enable any of the following specific validation features:

    • min [Boolean] — Validates that a value meets the min constraint. This is enabled by default when paramValidation is set to true.
    • max [Boolean] — Validates that a value meets the max constraint.
    • pattern [Boolean] — Validates that a string value matches a regular expression.
    • enum [Boolean] — Validates that a string value matches one of the allowable enum values.
  • computeChecksums (Boolean)

    whether to compute checksums for payload bodies when the service accepts it (currently supported in S3 only)

  • convertResponseTypes (Boolean)

    whether types are converted when parsing response data. Currently only supported for JSON based services. Turning this off may improve performance on large response payloads. Defaults to true.

  • correctClockSkew (Boolean)

    whether to apply a clock skew correction and retry requests that fail because of an skewed client clock. Defaults to false.

  • s3ForcePathStyle (Boolean)

    whether to force path style URLs for S3 objects.

  • s3BucketEndpoint (Boolean)

    whether the provided endpoint addresses an individual bucket (false if it addresses the root API endpoint). Note that setting this configuration option requires an endpoint to be provided explicitly to the service constructor.

  • s3DisableBodySigning (Boolean)

    whether S3 body signing should be disabled when using signature version v4. Body signing can only be disabled when using https. Defaults to true.

  • retryDelayOptions (map)

    A set of options to configure the retry delay on retryable errors. Currently supported options are:

    • base [Integer] — The base number of milliseconds to use in the exponential backoff for operation retries. Defaults to 100 ms for all services except DynamoDB, where it defaults to 50ms.
    • customBackoff [function] — A custom function that accepts a retry count and returns the amount of time to delay in milliseconds. The base option will be ignored if this option is supplied.
  • httpOptions (map)

    A set of options to pass to the low-level HTTP request. Currently supported options are:

    • proxy [String] — the URL to proxy requests through
    • agent [http.Agent, https.Agent] — the Agent object to perform HTTP requests with. Used for connection pooling. Defaults to the global agent (http.globalAgent) for non-SSL connections. Note that for SSL connections, a special Agent object is used in order to enable peer certificate verification. This feature is only available in the Node.js environment.
    • connectTimeout [Integer] — Sets the socket to timeout after failing to establish a connection with the server after connectTimeout milliseconds. This timeout has no effect once a socket connection has been established.
    • timeout [Integer] — Sets the socket to timeout after timeout milliseconds of inactivity on the socket. Defaults to two minutes (120000).
    • xhrAsync [Boolean] — Whether the SDK will send asynchronous HTTP requests. Used in the browser environment only. Set to false to send requests synchronously. Defaults to true (async on).
    • xhrWithCredentials [Boolean] — Sets the "withCredentials" property of an XMLHttpRequest object. Used in the browser environment only. Defaults to false.
  • apiVersion (String, Date)

    a String in YYYY-MM-DD format (or a date) that represents the latest possible API version that can be used in all services (unless overridden by apiVersions). Specify 'latest' to use the latest possible version.

  • apiVersions (map<String, String|Date>)

    a map of service identifiers (the lowercase service class name) with the API version to use when instantiating a service. Specify 'latest' for each individual that can use the latest available version.

  • logger (#write, #log)

    an object that responds to .write() (like a stream) or .log() (like the console object) in order to log information about requests

  • systemClockOffset (Number)

    an offset value in milliseconds to apply to all signing times. Use this to compensate for clock skew when your system may be out of sync with the service time. Note that this configuration option can only be applied to the global AWS.config object and cannot be overridden in service-specific configuration. Defaults to 0 milliseconds.

  • signatureVersion (String)

    the signature version to sign requests with (overriding the API configuration). Possible values are: 'v2', 'v3', 'v4'.

  • signatureCache (Boolean)

    whether the signature to sign requests with (overriding the API configuration) is cached. Only applies to the signature version 'v4'. Defaults to true.

  • dynamoDbCrc32 (Boolean)

    whether to validate the CRC32 checksum of HTTP response bodies returned by DynamoDB. Default: true.

Property Details

endpointAWS.Endpoint (readwrite)

Returns an Endpoint object representing the endpoint URL for service requests.

Returns:

  • (AWS.Endpoint)

    an Endpoint object representing the endpoint URL for service requests.

Method Details

batchDeleteAttributes(params = {}, callback) ⇒ AWS.Request

Performs multiple DeleteAttributes operations in a single call, which reduces round trips and latencies. This enables Amazon SimpleDB to optimize requests, which generally yields better throughput.

Note: If you specify BatchDeleteAttributes without attributes or values, all the attributes for the item are deleted. BatchDeleteAttributes is an idempotent operation; running it multiple times on the same item or attribute doesn't result in an error. The BatchDeleteAttributes operation succeeds or fails in its entirety. There are no partial deletes. You can execute multiple BatchDeleteAttributes operations and other operations in parallel. However, large numbers of concurrent BatchDeleteAttributes calls can result in Service Unavailable (503) responses. This operation is vulnerable to exceeding the maximum URL size when making a REST request using the HTTP GET method. This operation does not support conditions using Expected.X.Name, Expected.X.Value, or Expected.X.Exists.

The following limitations are enforced for this operation:

  • 1 MB request size
  • 25 item limit per BatchDeleteAttributes operation

Examples:

Calling the batchDeleteAttributes operation

var params = {
  DomainName: 'STRING_VALUE', /* required */
  Items: [ /* required */
    {
      Name: 'STRING_VALUE', /* required */
      Attributes: [
        {
          Name: 'STRING_VALUE', /* required */
          Value: 'STRING_VALUE'
        },
        /* more items */
      ]
    },
    /* more items */
  ]
};
simpledb.batchDeleteAttributes(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

  • params (Object) (defaults to: {})
    • DomainName — (String) The name of the domain in which the attributes are being deleted.
    • Items — (Array<map>) A list of items on which to perform the operation.
      • Namerequired — (String)
      • Attributes — (Array<map>)
        • Namerequired — (String) The name of the attribute.
        • Value — (String) The value of the attribute.

Callback (callback):

  • function(err, data) { ... }

    Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

    Context (this):

    • (AWS.Response)

      the response object containing error, data properties, and the original request object.

    Parameters:

    • err (Error)

      the error object returned from the request. Set to null if the request is successful.

    • data (Object)

      the de-serialized data returned from the request. Set to null if a request error occurs.

Returns:

  • (AWS.Request)

    a handle to the operation request for subsequent event callback registration.

batchPutAttributes(params = {}, callback) ⇒ AWS.Request

The BatchPutAttributes operation creates or replaces attributes within one or more items. By using this operation, the client can perform multiple PutAttribute operation with a single call. This helps yield savings in round trips and latencies, enabling Amazon SimpleDB to optimize requests and generally produce better throughput.

The client may specify the item name with the Item.X.ItemName parameter. The client may specify new attributes using a combination of the Item.X.Attribute.Y.Name and Item.X.Attribute.Y.Value parameters. The client may specify the first attribute for the first item using the parameters Item.0.Attribute.0.Name and Item.0.Attribute.0.Value, and for the second attribute for the first item by the parameters Item.0.Attribute.1.Name and Item.0.Attribute.1.Value, and so on.

Attributes are uniquely identified within an item by their name/value combination. For example, a single item can have the attributes { "first_name", "first_value" } and { "first_name", "second_value" }. However, it cannot have two attribute instances where both the Item.X.Attribute.Y.Name and Item.X.Attribute.Y.Value are the same.

Optionally, the requester can supply the Replace parameter for each individual value. Setting this value to true will cause the new attribute values to replace the existing attribute values. For example, if an item I has the attributes { 'a', '1' }, { 'b', '2'} and { 'b', '3' } and the requester does a BatchPutAttributes of {'I', 'b', '4' } with the Replace parameter set to true, the final attributes of the item will be { 'a', '1' } and { 'b', '4' }, replacing the previous values of the 'b' attribute with the new value.

Note: You cannot specify an empty string as an item or as an attribute name. The BatchPutAttributes operation succeeds or fails in its entirety. There are no partial puts.
This operation is vulnerable to exceeding the maximum URL size when making a REST request using the HTTP GET method. This operation does not support conditions using Expected.X.Name, Expected.X.Value, or Expected.X.Exists.

You can execute multiple BatchPutAttributes operations and other operations in parallel. However, large numbers of concurrent BatchPutAttributes calls can result in Service Unavailable (503) responses.

The following limitations are enforced for this operation:

  • 256 attribute name-value pairs per item
  • 1 MB request size
  • 1 billion attributes per domain
  • 10 GB of total user data storage per domain
  • 25 item limit per BatchPutAttributes operation

Examples:

Calling the batchPutAttributes operation

var params = {
  DomainName: 'STRING_VALUE', /* required */
  Items: [ /* required */
    {
      Attributes: [ /* required */
        {
          Name: 'STRING_VALUE', /* required */
          Value: 'STRING_VALUE', /* required */
          Replace: true || false
        },
        /* more items */
      ],
      Name: 'STRING_VALUE' /* required */
    },
    /* more items */
  ]
};
simpledb.batchPutAttributes(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

  • params (Object) (defaults to: {})
    • DomainName — (String) The name of the domain in which the attributes are being stored.
    • Items — (Array<map>) A list of items on which to perform the operation.
      • Namerequired — (String) The name of the replaceable item.
      • Attributesrequired — (Array<map>) The list of attributes for a replaceable item.
        • Namerequired — (String) The name of the replaceable attribute.
        • Valuerequired — (String) The value of the replaceable attribute.
        • Replace — (Boolean) A flag specifying whether or not to replace the attribute/value pair or to add a new attribute/value pair. The default setting is false.

Callback (callback):

  • function(err, data) { ... }

    Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

    Context (this):

    • (AWS.Response)

      the response object containing error, data properties, and the original request object.

    Parameters:

    • err (Error)

      the error object returned from the request. Set to null if the request is successful.

    • data (Object)

      the de-serialized data returned from the request. Set to null if a request error occurs.

Returns:

  • (AWS.Request)

    a handle to the operation request for subsequent event callback registration.

createDomain(params = {}, callback) ⇒ AWS.Request

The CreateDomain operation creates a new domain. The domain name should be unique among the domains associated with the Access Key ID provided in the request. The CreateDomain operation may take 10 or more seconds to complete.

Note: CreateDomain is an idempotent operation; running it multiple times using the same domain name will not result in an error response.

The client can create up to 100 domains per account.

If the client requires additional domains, go to http://aws.amazon.com/contact-us/simpledb-limit-request/.

Examples:

Calling the createDomain operation

var params = {
  DomainName: 'STRING_VALUE' /* required */
};
simpledb.createDomain(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

  • params (Object) (defaults to: {})
    • DomainName — (String) The name of the domain to create. The name can range between 3 and 255 characters and can contain the following characters: a-z, A-Z, 0-9, '_', '-', and '.'.

Callback (callback):

  • function(err, data) { ... }

    Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

    Context (this):

    • (AWS.Response)

      the response object containing error, data properties, and the original request object.

    Parameters:

    • err (Error)

      the error object returned from the request. Set to null if the request is successful.

    • data (Object)

      the de-serialized data returned from the request. Set to null if a request error occurs.

Returns:

  • (AWS.Request)

    a handle to the operation request for subsequent event callback registration.

deleteAttributes(params = {}, callback) ⇒ AWS.Request

Deletes one or more attributes associated with an item. If all attributes of the item are deleted, the item is deleted.

Note: If DeleteAttributes is called without being passed any attributes or values specified, all the attributes for the item are deleted.

DeleteAttributes is an idempotent operation; running it multiple times on the same item or attribute does not result in an error response.

Because Amazon SimpleDB makes multiple copies of item data and uses an eventual consistency update model, performing a GetAttributes or Select operation (read) immediately after a DeleteAttributes or PutAttributes operation (write) might not return updated item data.

Examples:

Calling the deleteAttributes operation

var params = {
  DomainName: 'STRING_VALUE', /* required */
  ItemName: 'STRING_VALUE', /* required */
  Attributes: [
    {
      Name: 'STRING_VALUE', /* required */
      Value: 'STRING_VALUE'
    },
    /* more items */
  ],
  Expected: {
    Exists: true || false,
    Name: 'STRING_VALUE',
    Value: 'STRING_VALUE'
  }
};
simpledb.deleteAttributes(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

  • params (Object) (defaults to: {})
    • DomainName — (String) The name of the domain in which to perform the operation.
    • ItemName — (String) The name of the item. Similar to rows on a spreadsheet, items represent individual objects that contain one or more value-attribute pairs.
    • Attributes — (Array<map>) A list of Attributes. Similar to columns on a spreadsheet, attributes represent categories of data that can be assigned to items.
      • Namerequired — (String) The name of the attribute.
      • Value — (String) The value of the attribute.
    • Expected — (map) The update condition which, if specified, determines whether the specified attributes will be deleted or not. The update condition must be satisfied in order for this request to be processed and the attributes to be deleted.
      • Name — (String)

        The name of the attribute involved in the condition.

      • Value — (String)

        The value of an attribute. This value can only be specified when the Exists parameter is equal to true.

      • Exists — (Boolean)

        A value specifying whether or not the specified attribute must exist with the specified value in order for the update condition to be satisfied. Specify true if the attribute must exist for the update condition to be satisfied. Specify false if the attribute should not exist in order for the update condition to be satisfied.

Callback (callback):

  • function(err, data) { ... }

    Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

    Context (this):

    • (AWS.Response)

      the response object containing error, data properties, and the original request object.

    Parameters:

    • err (Error)

      the error object returned from the request. Set to null if the request is successful.

    • data (Object)

      the de-serialized data returned from the request. Set to null if a request error occurs.

Returns:

  • (AWS.Request)

    a handle to the operation request for subsequent event callback registration.

deleteDomain(params = {}, callback) ⇒ AWS.Request

The DeleteDomain operation deletes a domain. Any items (and their attributes) in the domain are deleted as well. The DeleteDomain operation might take 10 or more seconds to complete.

Note: Running DeleteDomain on a domain that does not exist or running the function multiple times using the same domain name will not result in an error response.

Examples:

Calling the deleteDomain operation

var params = {
  DomainName: 'STRING_VALUE' /* required */
};
simpledb.deleteDomain(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

  • params (Object) (defaults to: {})
    • DomainName — (String) The name of the domain to delete.

Callback (callback):

  • function(err, data) { ... }

    Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

    Context (this):

    • (AWS.Response)

      the response object containing error, data properties, and the original request object.

    Parameters:

    • err (Error)

      the error object returned from the request. Set to null if the request is successful.

    • data (Object)

      the de-serialized data returned from the request. Set to null if a request error occurs.

Returns:

  • (AWS.Request)

    a handle to the operation request for subsequent event callback registration.

domainMetadata(params = {}, callback) ⇒ AWS.Request

Returns information about the domain, including when the domain was created, the number of items and attributes in the domain, and the size of the attribute names and values.

Examples:

Calling the domainMetadata operation

var params = {
  DomainName: 'STRING_VALUE' /* required */
};
simpledb.domainMetadata(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

  • params (Object) (defaults to: {})
    • DomainName — (String) The name of the domain for which to display the metadata of.

Callback (callback):

  • function(err, data) { ... }

    Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

    Context (this):

    • (AWS.Response)

      the response object containing error, data properties, and the original request object.

    Parameters:

    • err (Error)

      the error object returned from the request. Set to null if the request is successful.

    • data (Object)

      the de-serialized data returned from the request. Set to null if a request error occurs. The data object has the following properties:

      • ItemCount — (Integer) The number of all items in the domain.
      • ItemNamesSizeBytes — (Integer) The total size of all item names in the domain, in bytes.
      • AttributeNameCount — (Integer) The number of unique attribute names in the domain.
      • AttributeNamesSizeBytes — (Integer) The total size of all unique attribute names in the domain, in bytes.
      • AttributeValueCount — (Integer) The number of all attribute name/value pairs in the domain.
      • AttributeValuesSizeBytes — (Integer) The total size of all attribute values in the domain, in bytes.
      • Timestamp — (Integer) The data and time when metadata was calculated, in Epoch (UNIX) seconds.

Returns:

  • (AWS.Request)

    a handle to the operation request for subsequent event callback registration.

getAttributes(params = {}, callback) ⇒ AWS.Request

Returns all of the attributes associated with the specified item. Optionally, the attributes returned can be limited to one or more attributes by specifying an attribute name parameter.

If the item does not exist on the replica that was accessed for this operation, an empty set is returned. The system does not return an error as it cannot guarantee the item does not exist on other replicas.

Note: If GetAttributes is called without being passed any attribute names, all the attributes for the item are returned.

Examples:

Calling the getAttributes operation

var params = {
  DomainName: 'STRING_VALUE', /* required */
  ItemName: 'STRING_VALUE', /* required */
  AttributeNames: [
    'STRING_VALUE',
    /* more items */
  ],
  ConsistentRead: true || false
};
simpledb.getAttributes(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

  • params (Object) (defaults to: {})
    • DomainName — (String) The name of the domain in which to perform the operation.
    • ItemName — (String) The name of the item.
    • AttributeNames — (Array<String>) The names of the attributes.
    • ConsistentRead — (Boolean) 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.

Callback (callback):

  • function(err, data) { ... }

    Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

    Context (this):

    • (AWS.Response)

      the response object containing error, data properties, and the original request object.

    Parameters:

    • err (Error)

      the error object returned from the request. Set to null if the request is successful.

    • data (Object)

      the de-serialized data returned from the request. Set to null if a request error occurs. The data object has the following properties:

      • Attributes — (Array<map>) The list of attributes returned by the operation.
        • Namerequired — (String) The name of the attribute.
        • AlternateNameEncoding — (String)

        • Valuerequired — (String) The value of the attribute.
        • AlternateValueEncoding — (String)

Returns:

  • (AWS.Request)

    a handle to the operation request for subsequent event callback registration.

listDomains(params = {}, callback) ⇒ AWS.Request

The ListDomains operation lists all domains associated with the Access Key ID. It returns domain names up to the limit set by MaxNumberOfDomains. A NextToken is returned if there are more than MaxNumberOfDomains domains. Calling ListDomains successive times with the NextToken provided by the operation returns up to MaxNumberOfDomains more domain names with each successive operation call.

Examples:

Calling the listDomains operation

var params = {
  MaxNumberOfDomains: 0,
  NextToken: 'STRING_VALUE'
};
simpledb.listDomains(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

  • params (Object) (defaults to: {})
    • MaxNumberOfDomains — (Integer) The maximum number of domain names you want returned. The range is 1 to 100. The default setting is 100.
    • NextToken — (String) A string informing Amazon SimpleDB where to start the next list of domain names.

Callback (callback):

  • function(err, data) { ... }

    Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

    Context (this):

    • (AWS.Response)

      the response object containing error, data properties, and the original request object.

    Parameters:

    • err (Error)

      the error object returned from the request. Set to null if the request is successful.

    • data (Object)

      the de-serialized data returned from the request. Set to null if a request error occurs. The data object has the following properties:

      • DomainNames — (Array<String>) A list of domain names that match the expression.
      • NextToken — (String) An opaque token indicating that there are more domains than the specified MaxNumberOfDomains still available.

Returns:

  • (AWS.Request)

    a handle to the operation request for subsequent event callback registration.

putAttributes(params = {}, callback) ⇒ AWS.Request

The PutAttributes operation creates or replaces attributes in an item. The client may specify new attributes using a combination of the Attribute.X.Name and Attribute.X.Value parameters. The client specifies the first attribute by the parameters Attribute.0.Name and Attribute.0.Value, the second attribute by the parameters Attribute.1.Name and Attribute.1.Value, and so on.

Attributes are uniquely identified in an item by their name/value combination. For example, a single item can have the attributes { "first_name", "first_value" } and { "first_name", second_value" }. However, it cannot have two attribute instances where both the Attribute.X.Name and Attribute.X.Value are the same.

Optionally, the requestor can supply the Replace parameter for each individual attribute. Setting this value to true causes the new attribute value to replace the existing attribute value(s). For example, if an item has the attributes { 'a', '1' }, { 'b', '2'} and { 'b', '3' } and the requestor calls PutAttributes using the attributes { 'b', '4' } with the Replace parameter set to true, the final attributes of the item are changed to { 'a', '1' } and { 'b', '4' }, which replaces the previous values of the 'b' attribute with the new value.

Note: Using PutAttributes to replace attribute values that do not exist will not result in an error response.

You cannot specify an empty string as an attribute name.

Because Amazon SimpleDB makes multiple copies of client data and uses an eventual consistency update model, an immediate GetAttributes or Select operation (read) immediately after a PutAttributes or DeleteAttributes operation (write) might not return the updated data.

The following limitations are enforced for this operation:

  • 256 total attribute name-value pairs per item
  • One billion attributes per domain
  • 10 GB of total user data storage per domain

Examples:

Calling the putAttributes operation

var params = {
  Attributes: [ /* required */
    {
      Name: 'STRING_VALUE', /* required */
      Value: 'STRING_VALUE', /* required */
      Replace: true || false
    },
    /* more items */
  ],
  DomainName: 'STRING_VALUE', /* required */
  ItemName: 'STRING_VALUE', /* required */
  Expected: {
    Exists: true || false,
    Name: 'STRING_VALUE',
    Value: 'STRING_VALUE'
  }
};
simpledb.putAttributes(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

  • params (Object) (defaults to: {})
    • DomainName — (String) The name of the domain in which to perform the operation.
    • ItemName — (String) The name of the item.
    • Attributes — (Array<map>) The list of attributes.
      • Namerequired — (String) The name of the replaceable attribute.
      • Valuerequired — (String) The value of the replaceable attribute.
      • Replace — (Boolean) A flag specifying whether or not to replace the attribute/value pair or to add a new attribute/value pair. The default setting is false.
    • Expected — (map) The update condition which, if specified, determines whether the specified attributes will be updated or not. The update condition must be satisfied in order for this request to be processed and the attributes to be updated.
      • Name — (String)

        The name of the attribute involved in the condition.

      • Value — (String)

        The value of an attribute. This value can only be specified when the Exists parameter is equal to true.

      • Exists — (Boolean)

        A value specifying whether or not the specified attribute must exist with the specified value in order for the update condition to be satisfied. Specify true if the attribute must exist for the update condition to be satisfied. Specify false if the attribute should not exist in order for the update condition to be satisfied.

Callback (callback):

  • function(err, data) { ... }

    Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

    Context (this):

    • (AWS.Response)

      the response object containing error, data properties, and the original request object.

    Parameters:

    • err (Error)

      the error object returned from the request. Set to null if the request is successful.

    • data (Object)

      the de-serialized data returned from the request. Set to null if a request error occurs.

Returns:

  • (AWS.Request)

    a handle to the operation request for subsequent event callback registration.

select(params = {}, callback) ⇒ AWS.Request

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.

Examples:

Calling the select operation

var params = {
  SelectExpression: 'STRING_VALUE', /* required */
  ConsistentRead: true || false,
  NextToken: 'STRING_VALUE'
};
simpledb.select(params, function(err, data) {
  if (err) console.log(err, err.stack); // an error occurred
  else     console.log(data);           // successful response
});

Parameters:

  • params (Object) (defaults to: {})
    • SelectExpression — (String) The expression used to query the domain.
    • NextToken — (String) A string informing Amazon SimpleDB where to start the next list of ItemNames.
    • ConsistentRead — (Boolean) 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.

Callback (callback):

  • function(err, data) { ... }

    Called when a response from the service is returned. If a callback is not supplied, you must call AWS.Request.send() on the returned request object to initiate the request.

    Context (this):

    • (AWS.Response)

      the response object containing error, data properties, and the original request object.

    Parameters:

    • err (Error)

      the error object returned from the request. Set to null if the request is successful.

    • data (Object)

      the de-serialized data returned from the request. Set to null if a request error occurs. The data object has the following properties:

      • Items — (Array<map>) A list of items that match the select expression.
        • Namerequired — (String) The name of the item.
        • AlternateNameEncoding — (String)

        • Attributesrequired — (Array<map>) A list of attributes.
          • Namerequired — (String) The name of the attribute.
          • AlternateNameEncoding — (String)

          • Valuerequired — (String) The value of the attribute.
          • AlternateValueEncoding — (String)

      • NextToken — (String) An opaque token indicating that more items than MaxNumberOfItems were matched, the response size exceeded 1 megabyte, or the execution time exceeded 5 seconds.

Returns:

  • (AWS.Request)

    a handle to the operation request for subsequent event callback registration.