twalthr opened a new pull request, #23477:
URL: https://github.com/apache/flink/pull/23477
## What is the purpose of the change
"TABLE t" is translated into an implicit "SELECT * FROM t". This would
ignore columns
that are not expanded by default. However, the descriptor explicitly states
the need
for this column.
## Brief change log
Explicit table expressions (for window TVFs at most one)
are captured before rewriting and replaced with a "marker" SqlSelect that
contains the
descriptor information. The "marker" SqlSelect is considered during column
expansion.
## Verifying this change
This change added tests and can be verified as follows: `ColumnExpansionTest`
## 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? not applicable
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