aggThrow

Introduced in: v20.1.0 This function can be used for the purpose of testing exception safety. It will throw an exception on creation with the specified probability. Syntax

aggThrow(throw_prob)

Arguments

throw_prob — Probability to throw on creation. Float64

Returned value Returns an exception: Code: 503. DB::Exception: Aggregate function aggThrow has thrown exception successfully. Examples Usage example

Query

SELECT number % 2 AS even, aggThrow(number) FROM numbers(10) GROUP BY even;

Response

Received exception:
Code: 503. DB::Exception: Aggregate function aggThrow has thrown exception successfully: While executing AggregatingTransform. (AGGREGATE_FUNCTION_THROW)

Last modified on June 23, 2026

analysisOfVarianceProvides a statistical test for one-way analysis of variance (ANOVA test). It is a test over several groups of normally distributed observations to find out whether all groups have the same mean or not.

​aggThrow

aggThrow