Struct aws_sdk_dynamodb::model::KeySchemaElement [−][src]
#[non_exhaustive]pub struct KeySchemaElement {
pub attribute_name: Option<String>,
pub key_type: Option<KeyType>,
}
Expand description
Represents a single element of a key schema. A key schema specifies the attributes that make up the primary key of a table, or the key attributes of an index.
A KeySchemaElement
represents exactly one attribute of the primary key. For example, a
simple primary key would be represented by one KeySchemaElement
(for the partition key). A composite
primary key would require one KeySchemaElement
for the partition key, and another
KeySchemaElement
for the sort key.
A KeySchemaElement
must be a scalar, top-level attribute (not a nested attribute). The data type must be one of String, Number, or Binary. The attribute cannot be nested within a List or a Map.
Fields (Non-exhaustive)
This struct is marked as non-exhaustive
Struct { .. }
syntax; cannot be matched against without a wildcard ..
; and struct update syntax will not work.attribute_name: Option<String>
The name of a key attribute.
key_type: Option<KeyType>
The role that this key attribute will assume:
-
HASH
- partition key -
RANGE
- sort key
The partition key of an item is also known as its hash attribute. The term "hash attribute" derives from DynamoDB's usage of an internal hash function to evenly distribute data items across partitions, based on their partition key values.
The sort key of an item is also known as its range attribute. The term "range attribute" derives from the way DynamoDB stores items with the same partition key physically close together, in sorted order by the sort key value.
Implementations
Creates a new builder-style object to manufacture KeySchemaElement
Trait Implementations
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
Auto Trait Implementations
impl RefUnwindSafe for KeySchemaElement
impl Send for KeySchemaElement
impl Sync for KeySchemaElement
impl Unpin for KeySchemaElement
impl UnwindSafe for KeySchemaElement
Blanket Implementations
Mutably borrows from an owned value. Read more
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more