aggThrow

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

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

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

Introduced in version 20.1.