Module datafusion_expr::aggregate_function

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Aggregate function module contains all built-in aggregate functions definitions

Enums

AggregateFunction

Enum of all built-in aggregate functions

Statics

DATES
NUMERICS
STRINGS
TIMESTAMPS

Functions

avg_return_type

function return type of an average

coerce_types

Returns the coerced data type for each input_types. Different aggregate function with different input data type will get corresponding coerced data type.

correlation_return_type

function return type of correlation

covariance_return_type

function return type of covariance

is_approx_percentile_cont_supported_arg_type

Return true if arg_type is of a DataType that the AggregateFunction::ApproxPercentileCont aggregation can operate on.

is_avg_support_arg_type
is_correlation_support_arg_type
is_covariance_support_arg_type
is_stddev_support_arg_type
is_sum_support_arg_type
is_variance_support_arg_type
return_type

Returns the datatype of the aggregate function. This is used to get the returned data type for aggregate expr.

signature

the signatures supported by the function fun.

stddev_return_type

function return type of standard deviation

sum_return_type

function return type of a sum

variance_return_type

function return type of variance