xuyangzhong opened a new pull request, #23519:
URL: https://github.com/apache/flink/pull/23519
## What is the purpose of the change
When using row as a computed column and select the computed column as a
query, an exception will be thrown by calcite because of the type mismatch
about ROW.
The cause is that in Flink, we always treat the ROW as a struct type
PEEK_FIELDS_NO_EXPAND (refs to LogicalRelDataTypeConverter and
FlinkTypeFactory), but in calcite, the struct type about ROW is FULLY_QUALIFIED
(refs to SqlRowOperator#inferReturnType). And when selecting the column, the
difference causes this bug.
## Brief change log
*(for example:)*
- *Modify the SqlRowOperator to return the true struct type about ROW*
- *Add tests about this pr*
## Verifying this change
Necessary tests have been added.
## 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? no
- If yes, how is the feature documented? no
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