Module aggregates

Aggregates functionalities

Modules

order

Structs

AggregateExec

Hash aggregate execution plan

PhysicalGroupBy

Represents GROUP BY clause in the plan (including the more general GROUPING SET) In the case of a simple GROUP BY a, b clause, this will contain the expression [a, b] and a single group [false, false]. In the case of GROUP BY GROUPING SETS/CUBE/ROLLUP the planner will expand the expression into multiple groups, using null expressions to align each group. For example, with a group by clause GROUP BY GROUPING SETS ((a,b),(a),(b)) the planner should create a PhysicalGroupBy like

Enums

AggregateMode

Hash aggregate modes

Functions

aggregate_expressions

Returns physical expressions for arguments to evaluate against a batch.

concat_slices

Concatenates the given slices.

create_accumulators

finalize_aggregation

returns a vector of ArrayRefs, where each entry corresponds to either the final value (mode = Final, FinalPartitioned and Single) or states (mode = Partial)

get_finer_aggregate_exprs_requirement

Get the common requirement that satisfies all the aggregate expressions.

Type Aliases

AccumulatorItem