GitHub user Xpray opened a pull request:
https://github.com/apache/flink/pull/5988
[FLINK-9332][TableAPI & SQL] Fix Codegen error of CallGenerator
## What is the purpose of the change
Fix bugs that nullTerm do not handle function call return value correctly.
## Brief change log
- check function call return value and reset nullTerm if necessary.
## Verifying this change
This change added tests and can be verified as follows:
org.apache.flink.table.runtime.stream.sql.SqlITCase#testNullableFunctionCall
## 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, Yarn/Mesos, 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
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/Xpray/flink FLINK-9332
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/5988.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #5988
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commit 6feff0619846d3fb04b10566cb532b9ce5329128
Author: Xpray <leonxpray@...>
Date: 2018-05-11T05:06:31Z
[FLINK-9332][TableAPI & SQL] Fix Codegen error of CallGenerator
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