Crate tidb_query_aggr

This crate provides aggregate functions for batch executors.

Modules

impl_avg
impl_bit_op
impl_count
impl_first
impl_max_min
impl_sum
impl_variance
parser
summable
util

Macros

impl_concrete_state
impl_state_update_partial
impl_unmatched_function_state
update
update_concrete
update_repeat
update_vector

Structs

AllAggrDefinitionParser

Parse all aggregate function definition from protobuf.

Traits

AggrDefinitionParser	Parse a specific aggregate function definition from protobuf.
AggrFunction	A trait for all single parameter aggregate functions.
AggrFunctionState	A trait for all single parameter aggregate function states.
AggrFunctionStateUpdatePartial	A helper trait that provides update() and update_vector() over a concrete type, which will be relied in AggrFunctionState.
ConcreteAggrFunctionState	A helper trait for single parameter aggregate function states that only work over concrete eval types. This is the actual and only trait that normal aggregate function states will implement.