BlackHole
This documentation is for an unreleased version of Apache Flink. We recommend you use the latest stable version.

BlackHole SQL Connector #

Sink Sink

The BlackHole connector allows for swallowing all input records. It is designed for:

  • high performance testing.
  • UDF to output, not substantive sink.

Just like /dev/null device on Unix-like operating systems.

The BlackHole connector is built-in.

How to create a BlackHole table #

CREATE TABLE blackhole_table (
  f0 INT,
  f1 INT,
  f2 STRING,
  f3 DOUBLE
) WITH (
  'connector' = 'blackhole'
);

Alternatively, it may be based on an existing schema using the LIKE Clause.

CREATE TABLE blackhole_table WITH ('connector' = 'blackhole')
LIKE source_table (EXCLUDING ALL)

Connector Options #

Option Required Default Type Description
connector
required (none) String Specify what connector to use, here should be 'blackhole'.