snuyanzin opened a new pull request #18109:
URL: https://github.com/apache/flink/pull/18109
## What is the purpose of the change
The PR allows to specify the proportion of null values to generate with
DataGen per field,
like
```
CREATE TABLE Orders123 (
order_number STRING,
price DECIMAL(32,2),
buyer ROW<id INT, last_name STRING>,
order_time TIMESTAMP(3),
my_map MAP<INT,STRING>,
my_arrray ARRAY<STRING>
) WITH (
'connector' = 'datagen',
'fields.order_number.null-rate' = '0.7',
'fields.price.null-rate' = '1.0',
'fields.order_time.null-rate' = '0.5',
'fields.buyer.id.null-rate' = '0.5',
'fields.buyer.null-rate' = '0.5',
'fields.my_map.key.null-rate' = '0.5',
'fields.my_map.null-rate' = '0.5',
'fields.my_array.element.null-rate' = '0.1',
'fields.my_array.null-rate' = '0.5'
);
```
## Verifying this change
There have been added test cases to
_flink-table/flink-table-api-java-bridge/src/test/java/org/apache/flink/connector/datagen/table/types/DecimalDataRandomGeneratorTest.java_
## Does this pull request potentially affect one of the following parts:
- Dependencies (does it add or upgrade a dependency): (no)
- The public API, i.e., is any changed class annotated with
`@Public(Evolving)`: (no)
- The serializers: (no)
- The runtime per-record code paths (performance sensitive): (no)
- Anything that affects deployment or recovery: JobManager (and its
components), Checkpointing, Kubernetes/Yarn, ZooKeeper: (no)
- The S3 file system connector: (no)
## Documentation
- Does this pull request introduce a new feature? (yes)
- If yes, how is the feature documented? (docs)
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