Quality

Run high performance complex Data Quality and data processing rules using simple SQL in a batch or streaming Spark application at scale.

Write rules using simple SQL or create re-usable functions via SQL Lambdas - your rules are just versioned data, store them wherever convenient, use them by simply defining a column.

Rules are evaluated lazily during Spark actions, such as writing a row, with results saved in a single predictable and extensible column.

The documentation site https://sparkutils.github.io/quality/ breaks down the reason for Quality's existence, and it's usage.

What's it written in?

Scala with sprinklings of java for WholeStageCodeGen optimisations.

How do I use / build it?

For oss with Spark 3.4.1 use properties:

<properties>
    <qualityRuntime>3.4.1.oss_</qualityRuntime>
    <scalaCompatVersion>2.12</scalaCompatVersion>
    <sparkShortVersion>3.4</sparkShortVersion>
    <qualityVersion>0.1.3</qualityVersion>
    <snakeVersion>1.33</snakeVersion>
</properties>

with dependency:

<dependency>
    <groupId>com.sparkutils</groupId>
    <artifactId>quality_${qualityRuntime}${qualityShortVersion}_${scalaCompatVersion}</artifactId>
    <version>${qualityVersion}</version>
</dependency>

<!-- Only required if expressionRunner, to_yaml or from_yaml are used.  Provided scope if running on Databricks 1.24 on 12.2 and lower, 1.33 on 13.1 and higher -->
<dependency>
    <groupId>org.yaml</groupId>
    <artifactId>snakeyaml</artifactId>
    <version>${snakeVersion}</version>
    <scope>provided</scope>
</dependency>

The qualityRuntime variable also supports further runtime types, such as Databricks.

See the docs site build-tool-dependencies section for detailed instructions.