Spark ClickHouse Connector

Build on Apache Spark DataSourceV2 API.

Usage

See the documentation for how to use this connector.

Requirements

• Java 8 or 11
• Scala 2.12 or 2.13
• Apache Spark 3.3 or 3.4 or 3.5

Notes:

1. As of 0.5.0, this connector switches from ClickHouse raw gRPC Client to ClickHouse Official Java Client, which brings HTTP protocol support, extends the range of supported versions of ClickHouse Server.
2. Since 0.6.0, HTTP becomes the default protocol.
3. Since 0.7.0, gRPC is deprecated and not recommended, it may be removed in the future.
4. Since 0.8.0, gRPC is removed.

Compatible Matrix

Version	Compatible Spark Versions	ClickHouse JDBC version
0.8.0	Spark 3.3, 3.4, 3.5	0.4.6
0.7.2	Spark 3.3, 3.4	0.4.6
0.6.0	Spark 3.3	0.3.2-patch11
0.5.0	Spark 3.2, 3.3	0.3.2-patch11
0.4.0	Spark 3.2, 3.3	Not depend on
0.3.0	Spark 3.2, 3.3	Not depend on
0.2.1	Spark 3.2	Not depend on
0.1.2	Spark 3.2	Not depend on

Build

Build w/o test

./gradlew clean build -x test

Test

The project leverage Testcontainers and Docker Compose to do integration tests, you should install Docker and Docker Compose before running test, and check more details on Testcontainers document if you'd like to run test with remote Docker daemon.

Run all test

./gradlew clean test

Run all test w/ Spark 3.3 and Scala 2.13

./gradlew clean test -Dspark_binary_version=3.3 -Dscala_binary_version=2.13

Run single test

./gradlew test --tests=ConvertDistToLocalWriteSuite

Test against custom ClickHouse image

CLICKHOUSE_IMAGE=custom-org/clickhouse-server:custom-tag ./gradlew test