riteshghorse opened a new issue, #29565:
URL: https://github.com/apache/beam/issues/29565
### What happened?
There is an encoding issue when reading from BigQueryIO using
`readTableRowsWithSchema()`. This happens only when the query contains an array
of structs like shown below:
```
SELECT ARRAY[STRUCT(1, 2)] AS data
```
With this, the inferred schema has `NOT NULL` property attached to it:
```
Schema: Fields: Field{name=id, description=, type=STRING, options={{}}}
Field{name=field2, description=, type=ARRAY<ROW<id STRING, name STRING>NOT
NULL>NOT NULL, options={{}}}
```
So when an element to be encoded has one of the field as NULL, it throws a
null pointer exception along with the following encoding exception:
```
Unable to encode element `{...}` with coder `SchemaCoder<Schema: Fields:
Field{name=id, description=, type=STRING, options={{}}} Field{name=field2,
description=, type=ARRAY<ROW<id STRING, name STRING>NOT NULL>NOT NULL,
options={{}}}`
```
### Issue Priority
Priority: 2 (default / most bugs should be filed as P2)
### Issue Components
- [ ] Component: Python SDK
- [X] Component: Java SDK
- [ ] Component: Go SDK
- [ ] Component: Typescript SDK
- [X] Component: IO connector
- [ ] Component: Beam YAML
- [ ] Component: Beam examples
- [ ] Component: Beam playground
- [ ] Component: Beam katas
- [ ] Component: Website
- [ ] Component: Spark Runner
- [ ] Component: Flink Runner
- [ ] Component: Samza Runner
- [ ] Component: Twister2 Runner
- [ ] Component: Hazelcast Jet Runner
- [ ] Component: Google Cloud Dataflow Runner
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