Struct cassandra_cpp::AggregateMeta

pub struct AggregateMeta(_);

Metadata about a cassandra aggregate

Methods

impl AggregateMeta

Important traits for FieldIterator

impl Iterator for FieldIterator type Item = Field;

pub fn fields_iter(&self) -> FieldIterator

An iterator over the fields of an aggregate

pub fn get_name(&self) -> String

Gets the name of the aggregate.

pub fn full_name(&self) -> String

Gets the full name of the aggregate.

pub fn argument_count(&self) -> usize

Gets the number of arguments this aggregate takes.

pub fn argument_type(&self, index: usize) -> ConstDataType

Gets the aggregate's argument type for the provided index.

pub fn return_type(&self) -> ConstDataType

Gets the aggregate's argument return type.

pub fn state_type(&self) -> ConstDataType

Gets the aggregate's argument state type.

pub fn state_func(&self) -> FunctionMeta

Gets the function metadata for the aggregate's state function.

pub fn final_func(&self) -> FunctionMeta

Gets the function metadata for the aggregates's final function.

pub fn init_cond(&self) -> Value

Gets the initial condition value for the aggregate.

pub fn field_by_name(&self, name: &str) -> Option<Value>

Gets a metadata field for the provided name. Metadata fields allow direct access to the column data found in the underlying "aggregates" metadata table.

Trait Implementations

impl Debug for AggregateMeta

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.