Struct rusoto_dynamodb::KeySchemaElement
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pub struct KeySchemaElement { pub attribute_name: String, pub key_type: String, }
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
attribute_name: String
The name of a key attribute.
key_type: String
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' 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.
Trait Implementations
impl Default for KeySchemaElement
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fn default() -> KeySchemaElement
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Returns the "default value" for a type. Read more
impl Debug for KeySchemaElement
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fn fmt(&self, __arg_0: &mut Formatter) -> Result
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Formats the value using the given formatter. Read more
impl Clone for KeySchemaElement
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fn clone(&self) -> KeySchemaElement
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Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more