baiji v0.6.5 Baiji.Simpledb
Amazon SimpleDB is a web service providing the core database functions of data indexing and querying in the cloud. By offloading the time and effort associated with building and operating a web-scale database, SimpleDB provides developers the freedom to focus on application development. A traditional, clustered relational database requires a sizable upfront capital outlay, is complex to design, and often requires extensive and repetitive database administration. Amazon SimpleDB is dramatically simpler, requiring no schema, automatically indexing your data and providing a simple API for storage and access. This approach eliminates the administrative burden of data modeling, index maintenance, and performance tuning. Developers gain access to this functionality within Amazon’s proven computing environment, are able to scale instantly, and pay only for what they use.
Visit http://aws.amazon.com/simpledb/ for more information.
Link to this section Summary
Functions
Returns a map containing the input/output shapes for this endpoint
Outputs values common to all actions
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
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 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
Deletes one or more attributes associated with an item. If all attributes of the item are deleted, the item is deleted
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
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
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
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
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
The Select
operation returns a set of attributes for ItemNames
that
match the select expression. Select
is similar to the standard SQL SELECT
statement
Link to this section Functions
Returns a map containing the input/output shapes for this endpoint
Outputs values common to all actions
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.
- 1 MB request size
- 25 item limit per BatchDeleteAttributes
operation
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.
- 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
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.
Deletes one or more attributes associated with an item. If all attributes of the item are deleted, the item is deleted.
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.
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.
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.
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.
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.
- 256 total attribute name-value pairs per item
- One billion attributes per domain
- 10 GB of total user data storage per domain
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.