Struct tidb_query_aggr::impl_count::AggrFnStateCount

[+] Show declaration

pub struct AggrFnStateCount {
    count: usize,
}

[−] Expand description

The state of the COUNT aggregate function.

Fields

count: usize

Implementations

impl AggrFnStateCount[−]

pub fn new() -> Self

fn update<'a, TT>(
    &mut self,
    _ctx: &mut EvalContext,
    value: Option<TT>
) -> Result<()> where
    TT: EvaluableRef<'a>, 

fn update_repeat<'a, TT>(
    &mut self,
    _ctx: &mut EvalContext,
    value: Option<TT>,
    repeat_times: usize
) -> Result<()> where
    TT: EvaluableRef<'a>, 

fn update_vector<'a, TT, CC>(
    &mut self,
    _ctx: &mut EvalContext,
    _phantom_data: Option<TT>,
    physical_values: CC,
    logical_rows: &[usize]
) -> Result<()> where
    TT: EvaluableRef<'a>,
    CC: ChunkRef<'a, TT>, 

Trait Implementations

impl AggrFunctionState for AggrFnStateCount[+]

[+] Show hidden undocumented items

fn push_result(
    &self,
    _ctx: &mut EvalContext,
    target: &mut [VectorValue]
) -> Result<()>

impl<T> AggrFunctionStateUpdatePartial<T> for AggrFnStateCount where
    T: EvaluableRef<'static> + 'static,
    VectorValue: VectorValueExt<T::EvaluableType>, [+]

[+] Show hidden undocumented items

unsafe fn update_unsafe(
    &mut self,
    ctx: &mut EvalContext,
    value: Option<T>
) -> Result<()>[−]

Updates the internal state giving one row data.

unsafe fn update_repeat_unsafe(
    &mut self,
    ctx: &mut EvalContext,
    value: Option<T>,
    repeat_times: usize
) -> Result<()>[−]

Repeatedly updates the internal state giving one row data.

unsafe fn update_vector_unsafe(
    &mut self,
    ctx: &mut EvalContext,
    phantom_data: Option<T>,
    physical_values: T::ChunkedType,
    logical_rows: &[usize]
) -> Result<()>[−]

Updates the internal state giving multiple rows data.

impl Debug for AggrFnStateCount[+]

[+] Show hidden undocumented items

fn fmt(&self, f: &mut Formatter<'_>) -> Result[−]

Formats the value using the given formatter.