Struct QueryParameters

pub struct QueryParameters<'a> {
    pub consistency: Consistency,
    pub serial_consistency: Option<SerialConsistency>,
    pub timestamp: Option<i64>,
    pub page_size: Option<i32>,
    pub paging_state: PagingState,
    pub skip_metadata: bool,
    pub values: Cow<'a, SerializedValues>,
}

Various parameters controlling the execution of the statement.

Fields

consistency: Consistency

Consistency level for the query.

serial_consistency: Option<SerialConsistency>

Serial consistency level for the query, if specified.

timestamp: Option<i64>

Client-side-assigned timestamp for the query, if specified.

page_size: Option<i32>

Maximum number of rows to return for the query, if specified. If not specified, the server will not page the result, and instead return all rows in a single response. This is not recommended for large result sets, as it puts a lot of pressure on the server and network, as well as brings high memory usage on both client and server sides.

paging_state: PagingState

Paging state for the query, used to resume fetching results from a previous query. If empty paging state is provided, the query will start from the beginning.

skip_metadata: bool

Whether to skip metadata for the values in the result set. This is an optimisation that can be used when the client does not need the metadata for the values, because it has already been fetched upon preparing the statement.

values: Cow<'a, SerializedValues>

Values bound to the statements.

Implementations

impl QueryParameters<'_>

pub fn serialize( &self, buf: &mut impl BufMut, ) -> Result<(), QueryParametersSerializationError>

Serializes the parameters into the provided buffer.

impl QueryParameters<'_>

pub fn deserialize(buf: &mut &[u8]) -> Result<Self, RequestDeserializationError>

Deserializes the parameters from the provided buffer.

Trait Implementations

impl Default for QueryParameters<'_>

fn default() -> Self

Returns the “default value” for a type.